core: allow pausing and un-pausing of leader broker routine (#13045)
* core: allow pause/un-pause of eval broker on region leader. * agent: add ability to pause eval broker via scheduler config. * cli: add operator scheduler commands to interact with config. * api: add ability to pause eval broker via scheduler config * e2e: add operator scheduler test for eval broker pause. * docs: include new opertor scheduler CLI and pause eval API info.
This commit is contained in:
James Rasell
GitHub
parent
f227855de1
commit
181b247384
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@ -0,0 +1,7 @@
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```release-note:improvement
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cli: Added `scheduler get-config` and `scheduler set-config` commands to the operator CLI
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```
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```release-note:improvement
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core: Added the ability to pause and un-pause the eval broker and blocked eval broker
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```
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@ -134,6 +134,10 @@ type SchedulerConfiguration struct {
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// management ACL token
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RejectJobRegistration bool
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// PauseEvalBroker stops the leader evaluation broker process from running
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// until the configuration is updated and written to the Nomad servers.
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PauseEvalBroker bool
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// CreateIndex/ModifyIndex store the create/modify indexes of this configuration.
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CreateIndex uint64
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ModifyIndex uint64
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@ -5,6 +5,7 @@ import (
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"testing"
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"github.com/hashicorp/nomad/api/internal/testutil"
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"github.com/stretchr/testify/require"
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)
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func TestOperator_RaftGetConfiguration(t *testing.T) {
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@ -53,3 +54,46 @@ func TestOperator_RaftRemovePeerByID(t *testing.T) {
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t.Fatalf("err: %v", err)
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}
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}
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func TestOperator_SchedulerGetConfiguration(t *testing.T) {
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testutil.Parallel(t)
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c, s := makeClient(t, nil, nil)
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defer s.Stop()
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schedulerConfig, _, err := c.Operator().SchedulerGetConfiguration(nil)
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require.Nil(t, err)
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require.NotEmpty(t, schedulerConfig)
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}
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func TestOperator_SchedulerSetConfiguration(t *testing.T) {
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testutil.Parallel(t)
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c, s := makeClient(t, nil, nil)
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defer s.Stop()
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newSchedulerConfig := SchedulerConfiguration{
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SchedulerAlgorithm: SchedulerAlgorithmSpread,
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PreemptionConfig: PreemptionConfig{
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SystemSchedulerEnabled: true,
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SysBatchSchedulerEnabled: true,
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BatchSchedulerEnabled: true,
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ServiceSchedulerEnabled: true,
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},
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MemoryOversubscriptionEnabled: true,
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RejectJobRegistration: true,
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PauseEvalBroker: true,
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}
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schedulerConfigUpdateResp, _, err := c.Operator().SchedulerSetConfiguration(&newSchedulerConfig, nil)
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require.Nil(t, err)
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require.True(t, schedulerConfigUpdateResp.Updated)
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// We can't exactly predict the query meta responses, so we test fields
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// individually.
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schedulerConfig, _, err := c.Operator().SchedulerGetConfiguration(nil)
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require.Nil(t, err)
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require.Equal(t, schedulerConfig.SchedulerConfig.SchedulerAlgorithm, SchedulerAlgorithmSpread)
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require.True(t, schedulerConfig.SchedulerConfig.PauseEvalBroker)
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require.True(t, schedulerConfig.SchedulerConfig.RejectJobRegistration)
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require.True(t, schedulerConfig.SchedulerConfig.MemoryOversubscriptionEnabled)
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require.Equal(t, newSchedulerConfig.PreemptionConfig, schedulerConfig.SchedulerConfig.PreemptionConfig)
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}
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@ -262,6 +262,7 @@ func (s *HTTPServer) schedulerUpdateConfig(resp http.ResponseWriter, req *http.R
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SchedulerAlgorithm: structs.SchedulerAlgorithm(conf.SchedulerAlgorithm),
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MemoryOversubscriptionEnabled: conf.MemoryOversubscriptionEnabled,
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RejectJobRegistration: conf.RejectJobRegistration,
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PauseEvalBroker: conf.PauseEvalBroker,
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PreemptionConfig: structs.PreemptionConfig{
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SystemSchedulerEnabled: conf.PreemptionConfig.SystemSchedulerEnabled,
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SysBatchSchedulerEnabled: conf.PreemptionConfig.SysBatchSchedulerEnabled,
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@ -272,32 +272,32 @@ func TestOperator_ServerHealth_Unhealthy(t *testing.T) {
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func TestOperator_SchedulerGetConfiguration(t *testing.T) {
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ci.Parallel(t)
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httpTest(t, nil, func(s *TestAgent) {
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require := require.New(t)
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body := bytes.NewBuffer(nil)
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req, _ := http.NewRequest("GET", "/v1/operator/scheduler/configuration", body)
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resp := httptest.NewRecorder()
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obj, err := s.Server.OperatorSchedulerConfiguration(resp, req)
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require.Nil(err)
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require.Equal(200, resp.Code)
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require.Nil(t, err)
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require.Equal(t, 200, resp.Code)
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out, ok := obj.(structs.SchedulerConfigurationResponse)
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require.True(ok)
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require.True(t, ok)
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// Only system jobs can preempt other jobs by default.
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require.True(out.SchedulerConfig.PreemptionConfig.SystemSchedulerEnabled)
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require.False(out.SchedulerConfig.PreemptionConfig.SysBatchSchedulerEnabled)
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require.False(out.SchedulerConfig.PreemptionConfig.BatchSchedulerEnabled)
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require.False(out.SchedulerConfig.PreemptionConfig.ServiceSchedulerEnabled)
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require.False(out.SchedulerConfig.MemoryOversubscriptionEnabled)
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require.True(t, out.SchedulerConfig.PreemptionConfig.SystemSchedulerEnabled)
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require.False(t, out.SchedulerConfig.PreemptionConfig.SysBatchSchedulerEnabled)
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require.False(t, out.SchedulerConfig.PreemptionConfig.BatchSchedulerEnabled)
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require.False(t, out.SchedulerConfig.PreemptionConfig.ServiceSchedulerEnabled)
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require.False(t, out.SchedulerConfig.MemoryOversubscriptionEnabled)
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require.False(t, out.SchedulerConfig.PauseEvalBroker)
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})
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}
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func TestOperator_SchedulerSetConfiguration(t *testing.T) {
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ci.Parallel(t)
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httpTest(t, nil, func(s *TestAgent) {
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require := require.New(t)
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body := bytes.NewBuffer([]byte(`
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{
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"MemoryOversubscriptionEnabled": true,
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"PauseEvalBroker": true,
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"PreemptionConfig": {
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"SystemSchedulerEnabled": true,
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"ServiceSchedulerEnabled": true
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@ -306,11 +306,11 @@ func TestOperator_SchedulerSetConfiguration(t *testing.T) {
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req, _ := http.NewRequest("PUT", "/v1/operator/scheduler/configuration", body)
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resp := httptest.NewRecorder()
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setResp, err := s.Server.OperatorSchedulerConfiguration(resp, req)
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require.Nil(err)
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require.Equal(200, resp.Code)
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require.Nil(t, err)
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require.Equal(t, 200, resp.Code)
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schedSetResp, ok := setResp.(structs.SchedulerSetConfigurationResponse)
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require.True(ok)
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require.NotZero(schedSetResp.Index)
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require.True(t, ok)
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require.NotZero(t, schedSetResp.Index)
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args := structs.GenericRequest{
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QueryOptions: structs.QueryOptions{
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@ -320,12 +320,13 @@ func TestOperator_SchedulerSetConfiguration(t *testing.T) {
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var reply structs.SchedulerConfigurationResponse
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err = s.RPC("Operator.SchedulerGetConfiguration", &args, &reply)
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require.Nil(err)
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require.True(reply.SchedulerConfig.PreemptionConfig.SystemSchedulerEnabled)
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require.False(reply.SchedulerConfig.PreemptionConfig.SysBatchSchedulerEnabled)
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require.False(reply.SchedulerConfig.PreemptionConfig.BatchSchedulerEnabled)
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require.True(reply.SchedulerConfig.PreemptionConfig.ServiceSchedulerEnabled)
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require.True(reply.SchedulerConfig.MemoryOversubscriptionEnabled)
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require.Nil(t, err)
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require.True(t, reply.SchedulerConfig.PreemptionConfig.SystemSchedulerEnabled)
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require.False(t, reply.SchedulerConfig.PreemptionConfig.SysBatchSchedulerEnabled)
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require.False(t, reply.SchedulerConfig.PreemptionConfig.BatchSchedulerEnabled)
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require.True(t, reply.SchedulerConfig.PreemptionConfig.ServiceSchedulerEnabled)
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require.True(t, reply.SchedulerConfig.MemoryOversubscriptionEnabled)
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require.True(t, reply.SchedulerConfig.PauseEvalBroker)
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})
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}
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@ -571,7 +571,21 @@ func Commands(metaPtr *Meta, agentUi cli.Ui) map[string]cli.CommandFactory {
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Meta: meta,
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}, nil
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},
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"operator scheduler": func() (cli.Command, error) {
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return &OperatorSchedulerCommand{
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Meta: meta,
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}, nil
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},
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"operator scheduler get-config": func() (cli.Command, error) {
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return &OperatorSchedulerGetConfig{
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Meta: meta,
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}, nil
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},
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"operator scheduler set-config": func() (cli.Command, error) {
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return &OperatorSchedulerSetConfig{
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Meta: meta,
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}, nil
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},
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"operator snapshot": func() (cli.Command, error) {
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return &OperatorSnapshotCommand{
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Meta: meta,
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@ -186,6 +186,9 @@ func (m *monitor) monitor(evalID string) int {
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// Add the initial pending state
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m.update(newEvalState())
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m.ui.Info(fmt.Sprintf("%s: Monitoring evaluation %q",
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formatTime(time.Now()), limit(evalID, m.length)))
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for {
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// Query the evaluation
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eval, _, err := m.client.Evaluations().Info(evalID, nil)
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@ -194,9 +197,6 @@ func (m *monitor) monitor(evalID string) int {
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return 1
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}
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m.ui.Info(fmt.Sprintf("%s: Monitoring evaluation %q",
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formatTime(time.Now()), limit(eval.ID, m.length)))
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// Create the new eval state.
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state := newEvalState()
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state.status = eval.Status
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@ -0,0 +1,42 @@
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package command
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import (
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"strings"
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"github.com/mitchellh/cli"
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)
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// Ensure OperatorSchedulerCommand satisfies the cli.Command interface.
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var _ cli.Command = &OperatorSchedulerCommand{}
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type OperatorSchedulerCommand struct {
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Meta
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}
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func (o *OperatorSchedulerCommand) Help() string {
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helpText := `
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Usage: nomad operator scheduler <subcommand> [options]
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This command groups subcommands for interacting with Nomad's scheduler
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subsystem.
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Get the scheduler configuration:
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$ nomad operator scheduler get-config
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Set the scheduler to use the spread algorithm:
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$ nomad operator scheduler set-config -scheduler-algorithm=spread
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Please see the individual subcommand help for detailed usage information.
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`
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return strings.TrimSpace(helpText)
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}
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func (o *OperatorSchedulerCommand) Synopsis() string {
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return "Provides access to the scheduler configuration"
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}
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func (o *OperatorSchedulerCommand) Name() string { return "operator scheduler" }
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func (o *OperatorSchedulerCommand) Run(_ []string) int { return cli.RunResultHelp }
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@ -0,0 +1,118 @@
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package command
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import (
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"fmt"
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"strings"
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"github.com/mitchellh/cli"
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"github.com/posener/complete"
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)
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// Ensure OperatorSchedulerGetConfig satisfies the cli.Command interface.
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var _ cli.Command = &OperatorSchedulerGetConfig{}
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type OperatorSchedulerGetConfig struct {
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Meta
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json bool
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tmpl string
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}
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func (o *OperatorSchedulerGetConfig) AutocompleteFlags() complete.Flags {
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return mergeAutocompleteFlags(o.Meta.AutocompleteFlags(FlagSetClient),
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complete.Flags{
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"-json": complete.PredictNothing,
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"-t": complete.PredictAnything,
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},
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)
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}
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func (o *OperatorSchedulerGetConfig) AutocompleteArgs() complete.Predictor {
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return complete.PredictNothing
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}
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func (o *OperatorSchedulerGetConfig) Name() string { return "operator scheduler get-config" }
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func (o *OperatorSchedulerGetConfig) Run(args []string) int {
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flags := o.Meta.FlagSet("get-config", FlagSetClient)
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flags.BoolVar(&o.json, "json", false, "")
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flags.StringVar(&o.tmpl, "t", "", "")
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flags.Usage = func() { o.Ui.Output(o.Help()) }
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||||
|
||||
if err := flags.Parse(args); err != nil {
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||||
return 1
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}
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||||
|
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// Set up a client.
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client, err := o.Meta.Client()
|
||||
if err != nil {
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||||
o.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
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||||
return 1
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||||
}
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||||
|
||||
// Fetch the current configuration.
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resp, _, err := client.Operator().SchedulerGetConfiguration(nil)
|
||||
if err != nil {
|
||||
o.Ui.Error(fmt.Sprintf("Error querying scheduler configuration: %s", err))
|
||||
return 1
|
||||
}
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||||
|
||||
// If the user has specified to output the scheduler config as JSON or
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||||
// using a template, perform this action for the entire object and exit the
|
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// command.
|
||||
if o.json || len(o.tmpl) > 0 {
|
||||
out, err := Format(o.json, o.tmpl, resp)
|
||||
if err != nil {
|
||||
o.Ui.Error(err.Error())
|
||||
return 1
|
||||
}
|
||||
o.Ui.Output(out)
|
||||
return 0
|
||||
}
|
||||
|
||||
schedConfig := resp.SchedulerConfig
|
||||
|
||||
// Output the information.
|
||||
o.Ui.Output(formatKV([]string{
|
||||
fmt.Sprintf("Scheduler Algorithm|%s", schedConfig.SchedulerAlgorithm),
|
||||
fmt.Sprintf("Memory Oversubscription|%v", schedConfig.MemoryOversubscriptionEnabled),
|
||||
fmt.Sprintf("Reject Job Registration|%v", schedConfig.RejectJobRegistration),
|
||||
fmt.Sprintf("Pause Eval Broker|%v", schedConfig.PauseEvalBroker),
|
||||
fmt.Sprintf("Preemption System Scheduler|%v", schedConfig.PreemptionConfig.SystemSchedulerEnabled),
|
||||
fmt.Sprintf("Preemption Service Scheduler|%v", schedConfig.PreemptionConfig.ServiceSchedulerEnabled),
|
||||
fmt.Sprintf("Preemption Batch Scheduler|%v", schedConfig.PreemptionConfig.BatchSchedulerEnabled),
|
||||
fmt.Sprintf("Preemption SysBatch Scheduler|%v", schedConfig.PreemptionConfig.SysBatchSchedulerEnabled),
|
||||
fmt.Sprintf("Modify Index|%v", resp.SchedulerConfig.ModifyIndex),
|
||||
}))
|
||||
return 0
|
||||
}
|
||||
|
||||
func (o *OperatorSchedulerGetConfig) Synopsis() string {
|
||||
return "Display the current scheduler configuration"
|
||||
}
|
||||
|
||||
func (o *OperatorSchedulerGetConfig) Help() string {
|
||||
helpText := `
|
||||
Usage: nomad operator scheduler get-config [options]
|
||||
|
||||
Displays the current scheduler configuration.
|
||||
|
||||
If ACLs are enabled, this command requires a token with the 'operator:read'
|
||||
capability.
|
||||
|
||||
General Options:
|
||||
|
||||
` + generalOptionsUsage(usageOptsDefault|usageOptsNoNamespace) + `
|
||||
|
||||
Scheduler Get Config Options:
|
||||
|
||||
-json
|
||||
Output the scheduler config in its JSON format.
|
||||
|
||||
-t
|
||||
Format and display the scheduler config using a Go template.
|
||||
`
|
||||
|
||||
return strings.TrimSpace(helpText)
|
||||
}
|
||||
|
|
@ -0,0 +1,47 @@
|
|||
package command
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
"testing"
|
||||
|
||||
"github.com/hashicorp/nomad/api"
|
||||
"github.com/hashicorp/nomad/ci"
|
||||
"github.com/mitchellh/cli"
|
||||
"github.com/stretchr/testify/require"
|
||||
)
|
||||
|
||||
func TestOperatorSchedulerGetConfig_Run(t *testing.T) {
|
||||
ci.Parallel(t)
|
||||
|
||||
srv, _, addr := testServer(t, false, nil)
|
||||
defer srv.Shutdown()
|
||||
|
||||
ui := cli.NewMockUi()
|
||||
c := &OperatorSchedulerGetConfig{Meta: Meta{Ui: ui}}
|
||||
|
||||
// Run the command, so we get the default output and test this.
|
||||
require.EqualValues(t, 0, c.Run([]string{"-address=" + addr}))
|
||||
s := ui.OutputWriter.String()
|
||||
require.Contains(t, s, "Scheduler Algorithm = binpack")
|
||||
require.Contains(t, s, "Preemption SysBatch Scheduler = false")
|
||||
ui.ErrorWriter.Reset()
|
||||
ui.OutputWriter.Reset()
|
||||
|
||||
// Request JSON output and test.
|
||||
require.EqualValues(t, 0, c.Run([]string{"-address=" + addr, "-json"}))
|
||||
s = ui.OutputWriter.String()
|
||||
var js api.SchedulerConfiguration
|
||||
require.NoError(t, json.Unmarshal([]byte(s), &js))
|
||||
ui.ErrorWriter.Reset()
|
||||
ui.OutputWriter.Reset()
|
||||
|
||||
// Request a template output and test.
|
||||
require.EqualValues(t, 0, c.Run([]string{"-address=" + addr, "-t='{{printf \"%s!!!\" .SchedulerConfig.SchedulerAlgorithm}}'"}))
|
||||
require.Contains(t, ui.OutputWriter.String(), "binpack!!!")
|
||||
ui.ErrorWriter.Reset()
|
||||
ui.OutputWriter.Reset()
|
||||
|
||||
// Test an unsupported flag.
|
||||
require.EqualValues(t, 1, c.Run([]string{"-address=" + addr, "-yaml"}))
|
||||
require.Contains(t, ui.OutputWriter.String(), "Usage: nomad operator scheduler get-config")
|
||||
}
|
||||
|
|
@ -0,0 +1,210 @@
|
|||
package command
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"strings"
|
||||
|
||||
"github.com/hashicorp/nomad/api"
|
||||
flagHelper "github.com/hashicorp/nomad/helper/flags"
|
||||
"github.com/mitchellh/cli"
|
||||
"github.com/posener/complete"
|
||||
)
|
||||
|
||||
// Ensure OperatorSchedulerSetConfig satisfies the cli.Command interface.
|
||||
var _ cli.Command = &OperatorSchedulerSetConfig{}
|
||||
|
||||
type OperatorSchedulerSetConfig struct {
|
||||
Meta
|
||||
|
||||
// The scheduler configuration flags allow us to tell whether the user set
|
||||
// a value or not. This means we can safely merge the current configuration
|
||||
// with user supplied, selective updates.
|
||||
checkIndex string
|
||||
schedulerAlgorithm string
|
||||
memoryOversubscription flagHelper.BoolValue
|
||||
rejectJobRegistration flagHelper.BoolValue
|
||||
pauseEvalBroker flagHelper.BoolValue
|
||||
preemptBatchScheduler flagHelper.BoolValue
|
||||
preemptServiceScheduler flagHelper.BoolValue
|
||||
preemptSysBatchScheduler flagHelper.BoolValue
|
||||
preemptSystemScheduler flagHelper.BoolValue
|
||||
}
|
||||
|
||||
func (o *OperatorSchedulerSetConfig) AutocompleteFlags() complete.Flags {
|
||||
return mergeAutocompleteFlags(o.Meta.AutocompleteFlags(FlagSetClient),
|
||||
complete.Flags{
|
||||
"-check-index": complete.PredictAnything,
|
||||
"-scheduler-algorithm": complete.PredictSet(
|
||||
string(api.SchedulerAlgorithmBinpack),
|
||||
string(api.SchedulerAlgorithmSpread),
|
||||
),
|
||||
"-memory-oversubscription": complete.PredictSet("true", "false"),
|
||||
"-reject-job-registration": complete.PredictSet("true", "false"),
|
||||
"-pause-eval-broker": complete.PredictSet("true", "false"),
|
||||
"-preempt-batch-scheduler": complete.PredictSet("true", "false"),
|
||||
"-preempt-service-scheduler": complete.PredictSet("true", "false"),
|
||||
"-preempt-sysbatch-scheduler": complete.PredictSet("true", "false"),
|
||||
"-preempt-system-scheduler": complete.PredictSet("true", "false"),
|
||||
},
|
||||
)
|
||||
}
|
||||
|
||||
func (o *OperatorSchedulerSetConfig) AutocompleteArgs() complete.Predictor {
|
||||
return complete.PredictNothing
|
||||
}
|
||||
|
||||
func (o *OperatorSchedulerSetConfig) Name() string { return "operator scheduler set-config" }
|
||||
|
||||
func (o *OperatorSchedulerSetConfig) Run(args []string) int {
|
||||
|
||||
flags := o.Meta.FlagSet("set-config", FlagSetClient)
|
||||
flags.Usage = func() { o.Ui.Output(o.Help()) }
|
||||
|
||||
flags.StringVar(&o.checkIndex, "check-index", "", "")
|
||||
flags.StringVar(&o.schedulerAlgorithm, "scheduler-algorithm", "", "")
|
||||
flags.Var(&o.memoryOversubscription, "memory-oversubscription", "")
|
||||
flags.Var(&o.rejectJobRegistration, "reject-job-registration", "")
|
||||
flags.Var(&o.pauseEvalBroker, "pause-eval-broker", "")
|
||||
flags.Var(&o.preemptBatchScheduler, "preempt-batch-scheduler", "")
|
||||
flags.Var(&o.preemptServiceScheduler, "preempt-service-scheduler", "")
|
||||
flags.Var(&o.preemptSysBatchScheduler, "preempt-sysbatch-scheduler", "")
|
||||
flags.Var(&o.preemptSystemScheduler, "preempt-system-scheduler", "")
|
||||
|
||||
if err := flags.Parse(args); err != nil {
|
||||
return 1
|
||||
}
|
||||
|
||||
// Set up a client.
|
||||
client, err := o.Meta.Client()
|
||||
if err != nil {
|
||||
o.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
|
||||
return 1
|
||||
}
|
||||
|
||||
// Check that we got no arguments.
|
||||
args = flags.Args()
|
||||
if l := len(args); l != 0 {
|
||||
o.Ui.Error("This command takes no arguments")
|
||||
o.Ui.Error(commandErrorText(o))
|
||||
return 1
|
||||
}
|
||||
|
||||
// Convert the check index string and handle any errors before adding this
|
||||
// to our request. This parsing handles empty values correctly.
|
||||
checkIndex, _, err := parseCheckIndex(o.checkIndex)
|
||||
if err != nil {
|
||||
o.Ui.Error(fmt.Sprintf("Error parsing check-index value %q: %v", o.checkIndex, err))
|
||||
return 1
|
||||
}
|
||||
|
||||
// Fetch the current configuration. This will be used as a base to merge
|
||||
// user configuration onto.
|
||||
resp, _, err := client.Operator().SchedulerGetConfiguration(nil)
|
||||
if err != nil {
|
||||
o.Ui.Error(fmt.Sprintf("Error querying for scheduler configuration: %s", err))
|
||||
return 1
|
||||
}
|
||||
|
||||
if checkIndex > 0 && resp.SchedulerConfig.ModifyIndex != checkIndex {
|
||||
errMsg := fmt.Sprintf("check-index %v does not match does not match current state value %v",
|
||||
checkIndex, resp.SchedulerConfig.ModifyIndex)
|
||||
o.Ui.Error(fmt.Sprintf("Error performing check index set: %s", errMsg))
|
||||
return 1
|
||||
}
|
||||
|
||||
schedulerConfig := resp.SchedulerConfig
|
||||
|
||||
// Overwrite the modification index if the user supplied one, otherwise we
|
||||
// use what was included within the read response.
|
||||
if checkIndex > 0 {
|
||||
schedulerConfig.ModifyIndex = checkIndex
|
||||
}
|
||||
|
||||
// Merge the current configuration with any values set by the operator.
|
||||
if o.schedulerAlgorithm != "" {
|
||||
schedulerConfig.SchedulerAlgorithm = api.SchedulerAlgorithm(o.schedulerAlgorithm)
|
||||
}
|
||||
o.memoryOversubscription.Merge(&schedulerConfig.MemoryOversubscriptionEnabled)
|
||||
o.rejectJobRegistration.Merge(&schedulerConfig.RejectJobRegistration)
|
||||
o.pauseEvalBroker.Merge(&schedulerConfig.PauseEvalBroker)
|
||||
o.preemptBatchScheduler.Merge(&schedulerConfig.PreemptionConfig.BatchSchedulerEnabled)
|
||||
o.preemptServiceScheduler.Merge(&schedulerConfig.PreemptionConfig.ServiceSchedulerEnabled)
|
||||
o.preemptSysBatchScheduler.Merge(&schedulerConfig.PreemptionConfig.SysBatchSchedulerEnabled)
|
||||
o.preemptSystemScheduler.Merge(&schedulerConfig.PreemptionConfig.SystemSchedulerEnabled)
|
||||
|
||||
// Check-and-set the new configuration.
|
||||
result, _, err := client.Operator().SchedulerCASConfiguration(schedulerConfig, nil)
|
||||
if err != nil {
|
||||
o.Ui.Error(fmt.Sprintf("Error setting scheduler configuration: %s", err))
|
||||
return 1
|
||||
}
|
||||
if result.Updated {
|
||||
o.Ui.Output("Scheduler configuration updated!")
|
||||
return 0
|
||||
}
|
||||
o.Ui.Output("Scheduler configuration could not be atomically updated, please try again")
|
||||
return 1
|
||||
}
|
||||
|
||||
func (o *OperatorSchedulerSetConfig) Synopsis() string {
|
||||
return "Modify the current scheduler configuration"
|
||||
}
|
||||
|
||||
func (o *OperatorSchedulerSetConfig) Help() string {
|
||||
helpText := `
|
||||
Usage: nomad operator scheduler set-config [options]
|
||||
|
||||
Modifies the current scheduler configuration.
|
||||
|
||||
If ACLs are enabled, this command requires a token with the 'operator:write'
|
||||
capability.
|
||||
|
||||
General Options:
|
||||
|
||||
` + generalOptionsUsage(usageOptsDefault|usageOptsNoNamespace) + `
|
||||
|
||||
Scheduler Set Config Options:
|
||||
|
||||
-check-index
|
||||
If set, the scheduler config is only updated if the passed modify index
|
||||
matches the current server side version. If a non-zero value is passed, it
|
||||
ensures that the scheduler config is being updated from a known state.
|
||||
|
||||
-scheduler-algorithm=["binpack"|"spread"]
|
||||
Specifies whether scheduler binpacks or spreads allocations on available
|
||||
nodes.
|
||||
|
||||
-memory-oversubscription=[true|false]
|
||||
When true, tasks may exceed their reserved memory limit, if the client has
|
||||
excess memory capacity. Tasks must specify memory_max to take advantage of
|
||||
memory oversubscription.
|
||||
|
||||
-reject-job-registration=[true|false]
|
||||
When true, the server will return permission denied errors for job registration,
|
||||
job dispatch, and job scale APIs, unless the ACL token for the request is a
|
||||
management token. If ACLs are disabled, no user will be able to register jobs.
|
||||
This allows operators to shed load from automated processes during incident
|
||||
response.
|
||||
|
||||
-pause-eval-broker=[true|false]
|
||||
When set to true, the eval broker which usually runs on the leader will be
|
||||
disabled. This will prevent the scheduler workers from receiving new work.
|
||||
|
||||
-preempt-batch-scheduler=[true|false]
|
||||
Specifies whether preemption for batch jobs is enabled. Note that if this
|
||||
is set to true, then batch jobs can preempt any other jobs.
|
||||
|
||||
-preempt-service-scheduler=[true|false]
|
||||
Specifies whether preemption for service jobs is enabled. Note that if this
|
||||
is set to true, then service jobs can preempt any other jobs.
|
||||
|
||||
-preempt-sysbatch-scheduler=[true|false]
|
||||
Specifies whether preemption for system batch jobs is enabled. Note that if
|
||||
this is set to true, then system batch jobs can preempt any other jobs.
|
||||
|
||||
-preempt-system-scheduler=[true|false]
|
||||
Specifies whether preemption for system jobs is enabled. Note that if this
|
||||
is set to true, then system jobs can preempt any other jobs.
|
||||
`
|
||||
return strings.TrimSpace(helpText)
|
||||
}
|
||||
|
|
@ -0,0 +1,108 @@
|
|||
package command
|
||||
|
||||
import (
|
||||
"strconv"
|
||||
"testing"
|
||||
|
||||
"github.com/hashicorp/nomad/api"
|
||||
"github.com/hashicorp/nomad/ci"
|
||||
"github.com/mitchellh/cli"
|
||||
"github.com/stretchr/testify/require"
|
||||
)
|
||||
|
||||
func TestOperatorSchedulerSetConfig_Run(t *testing.T) {
|
||||
ci.Parallel(t)
|
||||
|
||||
srv, _, addr := testServer(t, false, nil)
|
||||
defer srv.Shutdown()
|
||||
|
||||
ui := cli.NewMockUi()
|
||||
c := &OperatorSchedulerSetConfig{Meta: Meta{Ui: ui}}
|
||||
|
||||
bootstrappedConfig, _, err := srv.Client().Operator().SchedulerGetConfiguration(nil)
|
||||
require.NoError(t, err)
|
||||
require.NotEmpty(t, bootstrappedConfig.SchedulerConfig)
|
||||
|
||||
// Run the command with zero value and ensure the configuration does not
|
||||
// change.
|
||||
require.EqualValues(t, 0, c.Run([]string{"-address=" + addr}))
|
||||
ui.ErrorWriter.Reset()
|
||||
ui.OutputWriter.Reset()
|
||||
|
||||
// Read the configuration again and test that nothing has changed which
|
||||
// ensures our empty flags are working correctly.
|
||||
nonModifiedConfig, _, err := srv.Client().Operator().SchedulerGetConfiguration(nil)
|
||||
require.NoError(t, err)
|
||||
schedulerConfigEquals(t, bootstrappedConfig.SchedulerConfig, nonModifiedConfig.SchedulerConfig)
|
||||
|
||||
// Modify every configuration parameter using the flags. This ensures the
|
||||
// merging is working correctly and that operators can control the entire
|
||||
// object via the CLI.
|
||||
modifyingArgs := []string{
|
||||
"-address=" + addr,
|
||||
"-scheduler-algorithm=spread",
|
||||
"-pause-eval-broker=true",
|
||||
"-memory-oversubscription=true",
|
||||
"-reject-job-registration=true",
|
||||
"-preempt-batch-scheduler=true",
|
||||
"-preempt-service-scheduler=true",
|
||||
"-preempt-sysbatch-scheduler=true",
|
||||
"-preempt-system-scheduler=false",
|
||||
}
|
||||
require.EqualValues(t, 0, c.Run(modifyingArgs))
|
||||
s := ui.OutputWriter.String()
|
||||
require.Contains(t, s, "Scheduler configuration updated!")
|
||||
|
||||
modifiedConfig, _, err := srv.Client().Operator().SchedulerGetConfiguration(nil)
|
||||
require.NoError(t, err)
|
||||
schedulerConfigEquals(t, &api.SchedulerConfiguration{
|
||||
SchedulerAlgorithm: "spread",
|
||||
PreemptionConfig: api.PreemptionConfig{
|
||||
SystemSchedulerEnabled: false,
|
||||
SysBatchSchedulerEnabled: true,
|
||||
BatchSchedulerEnabled: true,
|
||||
ServiceSchedulerEnabled: true,
|
||||
},
|
||||
MemoryOversubscriptionEnabled: true,
|
||||
RejectJobRegistration: true,
|
||||
PauseEvalBroker: true,
|
||||
}, modifiedConfig.SchedulerConfig)
|
||||
|
||||
ui.ErrorWriter.Reset()
|
||||
ui.OutputWriter.Reset()
|
||||
|
||||
// Make a Freudian slip with one of the flags to ensure the usage is
|
||||
// returned.
|
||||
require.EqualValues(t, 1, c.Run([]string{"-address=" + addr, "-pause-evil-broker=true"}))
|
||||
require.Contains(t, ui.OutputWriter.String(), "Usage: nomad operator scheduler set-config")
|
||||
ui.ErrorWriter.Reset()
|
||||
ui.OutputWriter.Reset()
|
||||
|
||||
// Try updating the config using an incorrect check-index value.
|
||||
require.EqualValues(t, 1, c.Run([]string{
|
||||
"-address=" + addr,
|
||||
"-pause-eval-broker=false",
|
||||
"-check-index=1000000",
|
||||
}))
|
||||
require.Contains(t, ui.ErrorWriter.String(), "check-index 1000000 does not match does not match current state")
|
||||
ui.ErrorWriter.Reset()
|
||||
ui.OutputWriter.Reset()
|
||||
|
||||
// Try updating the config using a correct check-index value.
|
||||
require.EqualValues(t, 0, c.Run([]string{
|
||||
"-address=" + addr,
|
||||
"-pause-eval-broker=false",
|
||||
"-check-index=" + strconv.FormatUint(modifiedConfig.SchedulerConfig.ModifyIndex, 10),
|
||||
}))
|
||||
require.Contains(t, ui.OutputWriter.String(), "Scheduler configuration updated!")
|
||||
ui.ErrorWriter.Reset()
|
||||
ui.OutputWriter.Reset()
|
||||
}
|
||||
|
||||
func schedulerConfigEquals(t *testing.T, expected, actual *api.SchedulerConfiguration) {
|
||||
require.Equal(t, expected.SchedulerAlgorithm, actual.SchedulerAlgorithm)
|
||||
require.Equal(t, expected.RejectJobRegistration, actual.RejectJobRegistration)
|
||||
require.Equal(t, expected.MemoryOversubscriptionEnabled, actual.MemoryOversubscriptionEnabled)
|
||||
require.Equal(t, expected.PauseEvalBroker, actual.PauseEvalBroker)
|
||||
require.Equal(t, expected.PreemptionConfig, actual.PreemptionConfig)
|
||||
}
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
// Package operator_scheduler provides end-to-end tests for the Nomad operator
|
||||
// scheduler functionality and configuration options.
|
||||
//
|
||||
// In order to run this test suite only, from the e2e directory you can trigger
|
||||
// go test -v -run '^TestOperatorScheduler' ./operator_scheduler
|
||||
package operator_scheduler
|
||||
|
|
@ -0,0 +1,21 @@
|
|||
job "operator_scheduler" {
|
||||
datacenters = ["dc1"]
|
||||
type = "batch"
|
||||
|
||||
constraint {
|
||||
attribute = "${attr.kernel.name}"
|
||||
value = "linux"
|
||||
}
|
||||
|
||||
group "operator_scheduler" {
|
||||
|
||||
task "test" {
|
||||
driver = "raw_exec"
|
||||
|
||||
config {
|
||||
command = "bash"
|
||||
args = ["-c", "sleep 1"]
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,117 @@
|
|||
package operator_scheduler
|
||||
|
||||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/hashicorp/nomad/e2e/e2eutil"
|
||||
"github.com/hashicorp/nomad/helper/uuid"
|
||||
"github.com/stretchr/testify/assert"
|
||||
"github.com/stretchr/testify/require"
|
||||
)
|
||||
|
||||
const jobBasic = "./input/basic.nomad"
|
||||
|
||||
// TestOperatorScheduler runs the Nomad Operator Scheduler suit of tests which
|
||||
// focus on the behaviour of the /v1/operator/scheduler API.
|
||||
func TestOperatorScheduler(t *testing.T) {
|
||||
|
||||
// Wait until we have a usable cluster before running the tests.
|
||||
nomadClient := e2eutil.NomadClient(t)
|
||||
e2eutil.WaitForLeader(t, nomadClient)
|
||||
e2eutil.WaitForNodesReady(t, nomadClient, 1)
|
||||
|
||||
// Run our test cases.
|
||||
t.Run("TestOperatorScheduler_ConfigPauseEvalBroker", testConfigPauseEvalBroker)
|
||||
}
|
||||
|
||||
// testConfig tests pausing and un-pausing the eval broker and ensures the
|
||||
// correct behaviour is observed at each stage.
|
||||
func testConfigPauseEvalBroker(t *testing.T) {
|
||||
|
||||
nomadClient := e2eutil.NomadClient(t)
|
||||
|
||||
// Generate our job ID which will be used for the entire test.
|
||||
jobID := "operator-scheduler-config-pause-eval-broker-" + uuid.Generate()[:8]
|
||||
jobIDs := []string{jobID}
|
||||
|
||||
// Defer a cleanup function to remove the job. This will trigger if the
|
||||
// test fails, unless the cancel function is called.
|
||||
ctx, cancel := context.WithCancel(context.Background())
|
||||
defer e2eutil.CleanupJobsAndGCWithContext(t, ctx, &jobIDs)
|
||||
|
||||
// Register the job and ensure the alloc reaches the running state before
|
||||
// moving safely on.
|
||||
allocStubs := e2eutil.RegisterAndWaitForAllocs(t, nomadClient, jobBasic, jobID, "")
|
||||
require.Len(t, allocStubs, 1)
|
||||
e2eutil.WaitForAllocRunning(t, nomadClient, allocStubs[0].ID)
|
||||
|
||||
// Get the current scheduler config object.
|
||||
schedulerConfig, _, err := nomadClient.Operator().SchedulerGetConfiguration(nil)
|
||||
require.NoError(t, err)
|
||||
require.NotNil(t, schedulerConfig.SchedulerConfig)
|
||||
|
||||
// Set the eval broker to be paused.
|
||||
schedulerConfig.SchedulerConfig.PauseEvalBroker = true
|
||||
|
||||
// Write the config back to Nomad.
|
||||
schedulerConfigUpdate, _, err := nomadClient.Operator().SchedulerSetConfiguration(
|
||||
schedulerConfig.SchedulerConfig, nil)
|
||||
require.NoError(t, err)
|
||||
require.True(t, schedulerConfigUpdate.Updated)
|
||||
|
||||
// Perform a deregister call. The call will succeed and create an
|
||||
// evaluation. Do not use purge, so we can check the job status when
|
||||
// dereigster happens.
|
||||
evalID, _, err := nomadClient.Jobs().Deregister(jobID, false, nil)
|
||||
require.NoError(t, err)
|
||||
require.NotEmpty(t, evalID)
|
||||
|
||||
// Evaluation status is set to pending initially, so there isn't a great
|
||||
// way to ensure it doesn't transition to another status other than polling
|
||||
// for a long enough time to assume it won't change.
|
||||
timedFn := func() error {
|
||||
|
||||
// 5 seconds should be more than enough time for an eval to change
|
||||
// status unless the broker is disabled.
|
||||
timer := time.NewTimer(5 * time.Second)
|
||||
defer timer.Stop()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-timer.C:
|
||||
return nil
|
||||
default:
|
||||
evalInfo, _, err := nomadClient.Evaluations().Info(evalID, nil)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if !assert.Equal(t, "pending", evalInfo.Status) {
|
||||
return fmt.Errorf(`expected eval status "pending", got %q`, evalInfo.Status)
|
||||
}
|
||||
time.Sleep(1 * time.Second)
|
||||
}
|
||||
}
|
||||
}
|
||||
require.NoError(t, timedFn())
|
||||
|
||||
// Set the eval broker to be un-paused.
|
||||
schedulerConfig.SchedulerConfig.PauseEvalBroker = false
|
||||
|
||||
// Write the config back to Nomad.
|
||||
schedulerConfigUpdate, _, err = nomadClient.Operator().SchedulerSetConfiguration(
|
||||
schedulerConfig.SchedulerConfig, nil)
|
||||
require.NoError(t, err)
|
||||
require.True(t, schedulerConfigUpdate.Updated)
|
||||
|
||||
// Ensure the job is stopped, then run the garbage collection to clear out
|
||||
// all resources.
|
||||
e2eutil.WaitForJobStopped(t, nomadClient, jobID)
|
||||
_, err = e2eutil.Command("nomad", "system", "gc")
|
||||
require.NoError(t, err)
|
||||
|
||||
// If we have reached this far, we do not need to run the cleanup function.
|
||||
cancel()
|
||||
}
|
||||
|
|
@ -0,0 +1,106 @@
|
|||
package broker
|
||||
|
||||
import (
|
||||
"time"
|
||||
|
||||
"github.com/hashicorp/nomad/helper"
|
||||
)
|
||||
|
||||
// GenericNotifier allows a process to send updates to many subscribers in an
|
||||
// easy manner.
|
||||
type GenericNotifier struct {
|
||||
|
||||
// publishCh is the channel used to receive the update which will be sent
|
||||
// to all subscribers.
|
||||
publishCh chan interface{}
|
||||
|
||||
// subscribeCh and unsubscribeCh are the channels used to modify the
|
||||
// subscription membership mapping.
|
||||
subscribeCh chan chan interface{}
|
||||
unsubscribeCh chan chan interface{}
|
||||
}
|
||||
|
||||
// NewGenericNotifier returns a generic notifier which can be used by a process
|
||||
// to notify many subscribers when a specific update is triggered.
|
||||
func NewGenericNotifier() *GenericNotifier {
|
||||
return &GenericNotifier{
|
||||
publishCh: make(chan interface{}, 1),
|
||||
subscribeCh: make(chan chan interface{}, 1),
|
||||
unsubscribeCh: make(chan chan interface{}, 1),
|
||||
}
|
||||
}
|
||||
|
||||
// Notify allows the implementer to notify all subscribers with a specific
|
||||
// update. There is no guarantee the order in which subscribers receive the
|
||||
// message which is sent linearly.
|
||||
func (g *GenericNotifier) Notify(msg interface{}) {
|
||||
select {
|
||||
case g.publishCh <- msg:
|
||||
default:
|
||||
}
|
||||
}
|
||||
|
||||
// Run is a long-lived process which handles updating subscribers as well as
|
||||
// ensuring any update is sent to them. The passed stopCh is used to coordinate
|
||||
// shutdown.
|
||||
func (g *GenericNotifier) Run(stopCh <-chan struct{}) {
|
||||
|
||||
// Store our subscribers inline with a map. This map can only be accessed
|
||||
// via a single channel update at a time, meaning we can manage without
|
||||
// using a lock.
|
||||
subscribers := map[chan interface{}]struct{}{}
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-stopCh:
|
||||
return
|
||||
case msgCh := <-g.subscribeCh:
|
||||
subscribers[msgCh] = struct{}{}
|
||||
case msgCh := <-g.unsubscribeCh:
|
||||
delete(subscribers, msgCh)
|
||||
case update := <-g.publishCh:
|
||||
for subscriberCh := range subscribers {
|
||||
|
||||
// The subscribers channels are buffered, but ensure we don't
|
||||
// block the whole process on this.
|
||||
select {
|
||||
case subscriberCh <- update:
|
||||
default:
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// WaitForChange allows a subscriber to wait until there is a notification
|
||||
// change, or the timeout is reached. The function will block until one
|
||||
// condition is met.
|
||||
func (g *GenericNotifier) WaitForChange(timeout time.Duration) interface{} {
|
||||
|
||||
// Create a channel and subscribe to any update. This channel is buffered
|
||||
// to ensure we do not block the main broker process.
|
||||
updateCh := make(chan interface{}, 1)
|
||||
g.subscribeCh <- updateCh
|
||||
|
||||
// Create a timeout timer and use the helper to ensure this routine doesn't
|
||||
// panic and making the stop call clear.
|
||||
timeoutTimer, timeoutStop := helper.NewSafeTimer(timeout)
|
||||
|
||||
// Defer a function which performs all the required cleanup of the
|
||||
// subscriber once it has been notified of a change, or reached its wait
|
||||
// timeout.
|
||||
defer func() {
|
||||
g.unsubscribeCh <- updateCh
|
||||
close(updateCh)
|
||||
timeoutStop()
|
||||
}()
|
||||
|
||||
// Enter the main loop which listens for an update or timeout and returns
|
||||
// this information to the subscriber.
|
||||
select {
|
||||
case <-timeoutTimer.C:
|
||||
return "wait timed out after " + timeout.String()
|
||||
case update := <-updateCh:
|
||||
return update
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,55 @@
|
|||
package broker
|
||||
|
||||
import (
|
||||
"sync"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/hashicorp/nomad/ci"
|
||||
"github.com/stretchr/testify/require"
|
||||
)
|
||||
|
||||
func TestGenericNotifier(t *testing.T) {
|
||||
ci.Parallel(t)
|
||||
|
||||
// Create the new notifier.
|
||||
stopChan := make(chan struct{})
|
||||
defer close(stopChan)
|
||||
|
||||
notifier := NewGenericNotifier()
|
||||
go notifier.Run(stopChan)
|
||||
|
||||
// Ensure we have buffered channels.
|
||||
require.Equal(t, 1, cap(notifier.publishCh))
|
||||
require.Equal(t, 1, cap(notifier.subscribeCh))
|
||||
require.Equal(t, 1, cap(notifier.unsubscribeCh))
|
||||
|
||||
// Test that the timeout works.
|
||||
var timeoutWG sync.WaitGroup
|
||||
|
||||
for i := 0; i < 6; i++ {
|
||||
go func(wg *sync.WaitGroup) {
|
||||
wg.Add(1)
|
||||
msg := notifier.WaitForChange(100 * time.Millisecond)
|
||||
require.Equal(t, "wait timed out after 100ms", msg)
|
||||
wg.Done()
|
||||
}(&timeoutWG)
|
||||
}
|
||||
timeoutWG.Wait()
|
||||
|
||||
// Test that all subscribers recieve an update when a single notification
|
||||
// is sent.
|
||||
var notifiedWG sync.WaitGroup
|
||||
|
||||
for i := 0; i < 6; i++ {
|
||||
go func(wg *sync.WaitGroup) {
|
||||
wg.Add(1)
|
||||
msg := notifier.WaitForChange(3 * time.Second)
|
||||
require.Equal(t, "we got an update and not a timeout", msg)
|
||||
wg.Done()
|
||||
}(¬ifiedWG)
|
||||
}
|
||||
|
||||
notifier.Notify("we got an update and not a timeout")
|
||||
notifiedWG.Wait()
|
||||
}
|
||||
|
|
@ -6,11 +6,13 @@ import (
|
|||
"errors"
|
||||
"fmt"
|
||||
"math/rand"
|
||||
"strconv"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
metrics "github.com/armon/go-metrics"
|
||||
"github.com/hashicorp/nomad/helper"
|
||||
"github.com/hashicorp/nomad/helper/broker"
|
||||
"github.com/hashicorp/nomad/helper/uuid"
|
||||
"github.com/hashicorp/nomad/lib/delayheap"
|
||||
"github.com/hashicorp/nomad/nomad/structs"
|
||||
|
|
@ -49,6 +51,8 @@ type EvalBroker struct {
|
|||
deliveryLimit int
|
||||
|
||||
enabled bool
|
||||
enabledNotifier *broker.GenericNotifier
|
||||
|
||||
stats *BrokerStats
|
||||
|
||||
// evals tracks queued evaluations by ID to de-duplicate enqueue.
|
||||
|
|
@ -131,6 +135,7 @@ func NewEvalBroker(timeout, initialNackDelay, subsequentNackDelay time.Duration,
|
|||
nackTimeout: timeout,
|
||||
deliveryLimit: deliveryLimit,
|
||||
enabled: false,
|
||||
enabledNotifier: broker.NewGenericNotifier(),
|
||||
stats: new(BrokerStats),
|
||||
evals: make(map[string]int),
|
||||
jobEvals: make(map[structs.NamespacedID]string),
|
||||
|
|
@ -176,6 +181,9 @@ func (b *EvalBroker) SetEnabled(enabled bool) {
|
|||
if !enabled {
|
||||
b.flush()
|
||||
}
|
||||
|
||||
// Notify all subscribers to state changes of the broker enabled value.
|
||||
b.enabledNotifier.Notify("eval broker enabled status changed to " + strconv.FormatBool(enabled))
|
||||
}
|
||||
|
||||
// Enqueue is used to enqueue a new evaluation
|
||||
|
|
|
|||
|
|
@ -131,6 +131,23 @@ func (e *Eval) Dequeue(args *structs.EvalDequeueRequest,
|
|||
args.Timeout = DefaultDequeueTimeout
|
||||
}
|
||||
|
||||
// If the eval broker is paused, attempt to block and wait for a state
|
||||
// change before returning. This avoids a tight loop and mimics the
|
||||
// behaviour where there are no evals to process.
|
||||
//
|
||||
// The call can return because either the timeout is reached or the broker
|
||||
// SetEnabled function was called to modify its state. It is possible this
|
||||
// is because of leadership transition, therefore the RPC should exit to
|
||||
// allow all safety checks and RPC forwarding to occur again.
|
||||
//
|
||||
// The log line is trace, because the default worker timeout is 500ms which
|
||||
// produces a large amount of logging.
|
||||
if !e.srv.evalBroker.Enabled() {
|
||||
message := e.srv.evalBroker.enabledNotifier.WaitForChange(args.Timeout)
|
||||
e.logger.Trace("eval broker wait for un-pause", "message", message)
|
||||
return nil
|
||||
}
|
||||
|
||||
// Attempt the dequeue
|
||||
eval, token, err := e.srv.evalBroker.Dequeue(args.Schedulers, args.Timeout)
|
||||
if err != nil {
|
||||
|
|
|
|||
|
|
@ -454,6 +454,33 @@ func TestEvalEndpoint_Dequeue_Version_Mismatch(t *testing.T) {
|
|||
}
|
||||
}
|
||||
|
||||
func TestEvalEndpoint_Dequeue_BrokerDisabled(t *testing.T) {
|
||||
ci.Parallel(t)
|
||||
|
||||
s1, cleanupS1 := TestServer(t, func(c *Config) {
|
||||
c.NumSchedulers = 0 // Prevent automatic dequeue.
|
||||
})
|
||||
defer cleanupS1()
|
||||
codec := rpcClient(t, s1)
|
||||
testutil.WaitForLeader(t, s1.RPC)
|
||||
|
||||
// Create the register a request.
|
||||
eval1 := mock.Eval()
|
||||
s1.evalBroker.Enqueue(eval1)
|
||||
|
||||
// Disable the eval broker and try to dequeue.
|
||||
s1.evalBroker.SetEnabled(false)
|
||||
|
||||
get := &structs.EvalDequeueRequest{
|
||||
Schedulers: defaultSched,
|
||||
SchedulerVersion: scheduler.SchedulerVersion,
|
||||
WriteRequest: structs.WriteRequest{Region: "global"},
|
||||
}
|
||||
var resp structs.EvalDequeueResponse
|
||||
require.NoError(t, msgpackrpc.CallWithCodec(codec, "Eval.Dequeue", get, &resp))
|
||||
require.Empty(t, resp.Eval)
|
||||
}
|
||||
|
||||
func TestEvalEndpoint_Ack(t *testing.T) {
|
||||
ci.Parallel(t)
|
||||
|
||||
|
|
|
|||
|
|
@ -289,8 +289,8 @@ func (s *Server) establishLeadership(stopCh chan struct{}) error {
|
|||
s.getOrCreateAutopilotConfig()
|
||||
s.autopilot.Start()
|
||||
|
||||
// Initialize scheduler configuration
|
||||
s.getOrCreateSchedulerConfig()
|
||||
// Initialize scheduler configuration.
|
||||
schedulerConfig := s.getOrCreateSchedulerConfig()
|
||||
|
||||
// Initialize the ClusterID
|
||||
_, _ = s.ClusterID()
|
||||
|
|
@ -302,12 +302,9 @@ func (s *Server) establishLeadership(stopCh chan struct{}) error {
|
|||
// Start the plan evaluator
|
||||
go s.planApply()
|
||||
|
||||
// Enable the eval broker, since we are now the leader
|
||||
s.evalBroker.SetEnabled(true)
|
||||
|
||||
// Enable the blocked eval tracker, since we are now the leader
|
||||
s.blockedEvals.SetEnabled(true)
|
||||
s.blockedEvals.SetTimetable(s.fsm.TimeTable())
|
||||
// Start the eval broker and blocked eval broker if these are not paused by
|
||||
// the operator.
|
||||
restoreEvals := s.handleEvalBrokerStateChange(schedulerConfig)
|
||||
|
||||
// Enable the deployment watcher, since we are now the leader
|
||||
s.deploymentWatcher.SetEnabled(true, s.State())
|
||||
|
|
@ -318,10 +315,13 @@ func (s *Server) establishLeadership(stopCh chan struct{}) error {
|
|||
// Enable the volume watcher, since we are now the leader
|
||||
s.volumeWatcher.SetEnabled(true, s.State(), s.getLeaderAcl())
|
||||
|
||||
// Restore the eval broker state
|
||||
// Restore the eval broker state and blocked eval state. If these are
|
||||
// currently paused, we do not need to do this.
|
||||
if restoreEvals {
|
||||
if err := s.restoreEvals(); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
// Activate the vault client
|
||||
s.vault.SetActive(true)
|
||||
|
|
@ -1110,11 +1110,13 @@ func (s *Server) revokeLeadership() error {
|
|||
// Disable the plan queue, since we are no longer leader
|
||||
s.planQueue.SetEnabled(false)
|
||||
|
||||
// Disable the eval broker, since it is only useful as a leader
|
||||
// Disable the eval broker and blocked evals. We do not need to check the
|
||||
// scheduler configuration paused eval broker value, as the brokers should
|
||||
// always be paused on the non-leader.
|
||||
s.brokerLock.Lock()
|
||||
s.evalBroker.SetEnabled(false)
|
||||
|
||||
// Disable the blocked eval tracker, since it is only useful as a leader
|
||||
s.blockedEvals.SetEnabled(false)
|
||||
s.brokerLock.Unlock()
|
||||
|
||||
// Disable the periodic dispatcher, since it is only useful as a leader
|
||||
s.periodicDispatcher.SetEnabled(false)
|
||||
|
|
@ -1693,3 +1695,70 @@ func (s *Server) generateClusterID() (string, error) {
|
|||
s.logger.Named("core").Info("established cluster id", "cluster_id", newMeta.ClusterID, "create_time", newMeta.CreateTime)
|
||||
return newMeta.ClusterID, nil
|
||||
}
|
||||
|
||||
// handleEvalBrokerStateChange handles changing the evalBroker and blockedEvals
|
||||
// enabled status based on the passed scheduler configuration. The boolean
|
||||
// response indicates whether the caller needs to call restoreEvals() due to
|
||||
// the brokers being enabled. It is for use when the change must take the
|
||||
// scheduler configuration into account. This is not needed when calling
|
||||
// revokeLeadership, as the configuration doesn't matter, and we need to ensure
|
||||
// the brokers are stopped.
|
||||
//
|
||||
// The function checks the server is the leader and uses a mutex to avoid any
|
||||
// potential timings problems. Consider the following timings:
|
||||
// - operator updates the configuration via the API
|
||||
// - the RPC handler applies the change via Raft
|
||||
// - leadership transitions with write barrier
|
||||
// - the RPC handler call this function to enact the change
|
||||
//
|
||||
// The mutex also protects against a situation where leadership is revoked
|
||||
// while this function is being called. Ensuring the correct series of actions
|
||||
// occurs so that state stays consistent.
|
||||
func (s *Server) handleEvalBrokerStateChange(schedConfig *structs.SchedulerConfiguration) bool {
|
||||
|
||||
// Grab the lock first. Once we have this we can be sure to run everything
|
||||
// needed before any leader transition can attempt to modify the state.
|
||||
s.brokerLock.Lock()
|
||||
defer s.brokerLock.Unlock()
|
||||
|
||||
// If we are no longer the leader, exit early.
|
||||
if !s.IsLeader() {
|
||||
return false
|
||||
}
|
||||
|
||||
// enableEvalBroker tracks whether the evalBroker and blockedEvals
|
||||
// processes should be enabled or not. It allows us to answer this question
|
||||
// whether using a persisted Raft configuration, or the default bootstrap
|
||||
// config.
|
||||
var enableBrokers, restoreEvals bool
|
||||
|
||||
// The scheduler config can only be persisted to Raft once quorum has been
|
||||
// established. If this is a fresh cluster, we need to use the default
|
||||
// scheduler config, otherwise we can use the persisted object.
|
||||
switch schedConfig {
|
||||
case nil:
|
||||
enableBrokers = !s.config.DefaultSchedulerConfig.PauseEvalBroker
|
||||
default:
|
||||
enableBrokers = !schedConfig.PauseEvalBroker
|
||||
}
|
||||
|
||||
// If the evalBroker status is changing, set the new state.
|
||||
if enableBrokers != s.evalBroker.Enabled() {
|
||||
s.logger.Info("eval broker status modified", "paused", !enableBrokers)
|
||||
s.evalBroker.SetEnabled(enableBrokers)
|
||||
restoreEvals = enableBrokers
|
||||
}
|
||||
|
||||
// If the blockedEvals status is changing, set the new state.
|
||||
if enableBrokers != s.blockedEvals.Enabled() {
|
||||
s.logger.Info("blocked evals status modified", "paused", !enableBrokers)
|
||||
s.blockedEvals.SetEnabled(enableBrokers)
|
||||
restoreEvals = enableBrokers
|
||||
|
||||
if enableBrokers {
|
||||
s.blockedEvals.SetTimetable(s.fsm.TimeTable())
|
||||
}
|
||||
}
|
||||
|
||||
return restoreEvals
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1664,3 +1664,89 @@ func waitForStableLeadership(t *testing.T, servers []*Server) *Server {
|
|||
|
||||
return leader
|
||||
}
|
||||
|
||||
func TestServer_handleEvalBrokerStateChange(t *testing.T) {
|
||||
ci.Parallel(t)
|
||||
|
||||
testCases := []struct {
|
||||
startValue bool
|
||||
testServerCallBackConfig func(c *Config)
|
||||
inputSchedulerConfiguration *structs.SchedulerConfiguration
|
||||
expectedOutput bool
|
||||
name string
|
||||
}{
|
||||
{
|
||||
startValue: false,
|
||||
testServerCallBackConfig: func(c *Config) { c.DefaultSchedulerConfig.PauseEvalBroker = false },
|
||||
inputSchedulerConfiguration: nil,
|
||||
expectedOutput: true,
|
||||
name: "bootstrap un-paused",
|
||||
},
|
||||
{
|
||||
startValue: false,
|
||||
testServerCallBackConfig: func(c *Config) { c.DefaultSchedulerConfig.PauseEvalBroker = true },
|
||||
inputSchedulerConfiguration: nil,
|
||||
expectedOutput: false,
|
||||
name: "bootstrap paused",
|
||||
},
|
||||
{
|
||||
startValue: true,
|
||||
testServerCallBackConfig: nil,
|
||||
inputSchedulerConfiguration: &structs.SchedulerConfiguration{PauseEvalBroker: true},
|
||||
expectedOutput: false,
|
||||
name: "state change to paused",
|
||||
},
|
||||
{
|
||||
startValue: false,
|
||||
testServerCallBackConfig: nil,
|
||||
inputSchedulerConfiguration: &structs.SchedulerConfiguration{PauseEvalBroker: true},
|
||||
expectedOutput: false,
|
||||
name: "no state change to paused",
|
||||
},
|
||||
{
|
||||
startValue: false,
|
||||
testServerCallBackConfig: nil,
|
||||
inputSchedulerConfiguration: &structs.SchedulerConfiguration{PauseEvalBroker: false},
|
||||
expectedOutput: true,
|
||||
name: "state change to un-paused",
|
||||
},
|
||||
{
|
||||
startValue: false,
|
||||
testServerCallBackConfig: nil,
|
||||
inputSchedulerConfiguration: &structs.SchedulerConfiguration{PauseEvalBroker: true},
|
||||
expectedOutput: false,
|
||||
name: "no state change to un-paused",
|
||||
},
|
||||
}
|
||||
|
||||
for _, tc := range testCases {
|
||||
t.Run(tc.name, func(t *testing.T) {
|
||||
|
||||
// Create a new server and wait for leadership to be established.
|
||||
testServer, cleanupFn := TestServer(t, nil)
|
||||
_ = waitForStableLeadership(t, []*Server{testServer})
|
||||
defer cleanupFn()
|
||||
|
||||
// If we set a callback config, we are just testing the eventual
|
||||
// state of the brokers. Otherwise, we set our starting value and
|
||||
// then perform our state modification change and check.
|
||||
if tc.testServerCallBackConfig == nil {
|
||||
testServer.evalBroker.SetEnabled(tc.startValue)
|
||||
testServer.blockedEvals.SetEnabled(tc.startValue)
|
||||
actualOutput := testServer.handleEvalBrokerStateChange(tc.inputSchedulerConfiguration)
|
||||
require.Equal(t, tc.expectedOutput, actualOutput)
|
||||
}
|
||||
|
||||
// Check the brokers are in the expected state.
|
||||
var expectedEnabledVal bool
|
||||
|
||||
if tc.inputSchedulerConfiguration == nil {
|
||||
expectedEnabledVal = !testServer.config.DefaultSchedulerConfig.PauseEvalBroker
|
||||
} else {
|
||||
expectedEnabledVal = !tc.inputSchedulerConfiguration.PauseEvalBroker
|
||||
}
|
||||
require.Equal(t, expectedEnabledVal, testServer.evalBroker.Enabled())
|
||||
require.Equal(t, expectedEnabledVal, testServer.blockedEvals.Enabled())
|
||||
})
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -334,7 +334,19 @@ func (op *Operator) SchedulerSetConfiguration(args *structs.SchedulerSetConfigRe
|
|||
if respBool, ok := resp.(bool); ok {
|
||||
reply.Updated = respBool
|
||||
}
|
||||
|
||||
reply.Index = index
|
||||
|
||||
// If we updated the configuration, handle any required state changes within
|
||||
// the eval broker and blocked evals processes. The state change and
|
||||
// restore functions have protections around leadership transitions and
|
||||
// restoring into non-running brokers.
|
||||
if reply.Updated {
|
||||
if op.srv.handleEvalBrokerStateChange(&args.Config) {
|
||||
return op.srv.restoreEvals()
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -402,39 +402,42 @@ func TestOperator_SchedulerSetConfiguration(t *testing.T) {
|
|||
c.Build = "0.9.0+unittest"
|
||||
})
|
||||
defer cleanupS1()
|
||||
codec := rpcClient(t, s1)
|
||||
rpcCodec := rpcClient(t, s1)
|
||||
testutil.WaitForLeader(t, s1.RPC)
|
||||
|
||||
require := require.New(t)
|
||||
|
||||
// Disable preemption
|
||||
// Disable preemption and pause the eval broker.
|
||||
arg := structs.SchedulerSetConfigRequest{
|
||||
Config: structs.SchedulerConfiguration{
|
||||
PreemptionConfig: structs.PreemptionConfig{
|
||||
SystemSchedulerEnabled: false,
|
||||
},
|
||||
PauseEvalBroker: true,
|
||||
},
|
||||
}
|
||||
arg.Region = s1.config.Region
|
||||
|
||||
var setResponse structs.SchedulerSetConfigurationResponse
|
||||
err := msgpackrpc.CallWithCodec(codec, "Operator.SchedulerSetConfiguration", &arg, &setResponse)
|
||||
require.Nil(err)
|
||||
require.NotZero(setResponse.Index)
|
||||
err := msgpackrpc.CallWithCodec(rpcCodec, "Operator.SchedulerSetConfiguration", &arg, &setResponse)
|
||||
require.Nil(t, err)
|
||||
require.NotZero(t, setResponse.Index)
|
||||
|
||||
// Read and verify that preemption is disabled
|
||||
// Read and verify that preemption is disabled and the eval and blocked
|
||||
// evals systems are disabled.
|
||||
readConfig := structs.GenericRequest{
|
||||
QueryOptions: structs.QueryOptions{
|
||||
Region: s1.config.Region,
|
||||
},
|
||||
}
|
||||
var reply structs.SchedulerConfigurationResponse
|
||||
if err := msgpackrpc.CallWithCodec(codec, "Operator.SchedulerGetConfiguration", &readConfig, &reply); err != nil {
|
||||
t.Fatalf("err: %v", err)
|
||||
}
|
||||
err = msgpackrpc.CallWithCodec(rpcCodec, "Operator.SchedulerGetConfiguration", &readConfig, &reply)
|
||||
require.NoError(t, err)
|
||||
|
||||
require.NotZero(reply.Index)
|
||||
require.False(reply.SchedulerConfig.PreemptionConfig.SystemSchedulerEnabled)
|
||||
require.NotZero(t, reply.Index)
|
||||
require.False(t, reply.SchedulerConfig.PreemptionConfig.SystemSchedulerEnabled)
|
||||
require.True(t, reply.SchedulerConfig.PauseEvalBroker)
|
||||
|
||||
require.False(t, s1.evalBroker.Enabled())
|
||||
require.False(t, s1.blockedEvals.Enabled())
|
||||
}
|
||||
|
||||
func TestOperator_SchedulerGetConfiguration_ACL(t *testing.T) {
|
||||
|
|
|
|||
|
|
@ -190,6 +190,18 @@ type Server struct {
|
|||
// capacity changes.
|
||||
blockedEvals *BlockedEvals
|
||||
|
||||
// evalBroker is used to manage the in-progress evaluations
|
||||
// that are waiting to be brokered to a sub-scheduler
|
||||
evalBroker *EvalBroker
|
||||
|
||||
// brokerLock is used to synchronise the alteration of the blockedEvals and
|
||||
// evalBroker enabled state. These two subsystems change state when
|
||||
// leadership changes or when the user modifies the setting via the
|
||||
// operator scheduler configuration. This lock allows these actions to be
|
||||
// performed safely, without potential for user interactions and leadership
|
||||
// transitions to collide and create inconsistent state.
|
||||
brokerLock sync.Mutex
|
||||
|
||||
// deploymentWatcher is used to watch deployments and their allocations and
|
||||
// make the required calls to continue to transition the deployment.
|
||||
deploymentWatcher *deploymentwatcher.Watcher
|
||||
|
|
@ -200,10 +212,6 @@ type Server struct {
|
|||
// volumeWatcher is used to release volume claims
|
||||
volumeWatcher *volumewatcher.Watcher
|
||||
|
||||
// evalBroker is used to manage the in-progress evaluations
|
||||
// that are waiting to be brokered to a sub-scheduler
|
||||
evalBroker *EvalBroker
|
||||
|
||||
// periodicDispatcher is used to track and create evaluations for periodic jobs.
|
||||
periodicDispatcher *PeriodicDispatch
|
||||
|
||||
|
|
@ -423,6 +431,10 @@ func NewServer(config *Config, consulCatalog consul.CatalogAPI, consulConfigEntr
|
|||
return nil, fmt.Errorf("failed to create volume watcher: %v", err)
|
||||
}
|
||||
|
||||
// Start the eval broker notification system so any subscribers can get
|
||||
// updates when the processes SetEnabled is triggered.
|
||||
go s.evalBroker.enabledNotifier.Run(s.shutdownCh)
|
||||
|
||||
// Setup the node drainer.
|
||||
s.setupNodeDrainer()
|
||||
|
||||
|
|
|
|||
|
|
@ -156,6 +156,12 @@ type SchedulerConfiguration struct {
|
|||
// management ACL token
|
||||
RejectJobRegistration bool `hcl:"reject_job_registration"`
|
||||
|
||||
// PauseEvalBroker is a boolean to control whether the evaluation broker
|
||||
// should be paused on the cluster leader. Only a single broker runs per
|
||||
// region, and it must be persisted to state so the parameter is consistent
|
||||
// during leadership transitions.
|
||||
PauseEvalBroker bool `hcl:"pause_eval_broker"`
|
||||
|
||||
// CreateIndex/ModifyIndex store the create/modify indexes of this configuration.
|
||||
CreateIndex uint64
|
||||
ModifyIndex uint64
|
||||
|
|
|
|||
|
|
@ -40,18 +40,20 @@ $ curl \
|
|||
"Index": 5,
|
||||
"KnownLeader": true,
|
||||
"LastContact": 0,
|
||||
"NextToken": "",
|
||||
"SchedulerConfig": {
|
||||
"CreateIndex": 5,
|
||||
"MemoryOversubscriptionEnabled": false,
|
||||
"ModifyIndex": 5,
|
||||
"SchedulerAlgorithm": "spread",
|
||||
"MemoryOversubscriptionEnabled": true,
|
||||
"RejectJobRegistration": false,
|
||||
"PauseEvalBroker": false,
|
||||
"PreemptionConfig": {
|
||||
"SystemSchedulerEnabled": true,
|
||||
"SysBatchSchedulerEnabled": false,
|
||||
"BatchSchedulerEnabled": false,
|
||||
"ServiceSchedulerEnabled": false
|
||||
}
|
||||
"ServiceSchedulerEnabled": false,
|
||||
"SysBatchSchedulerEnabled": false,
|
||||
"SystemSchedulerEnabled": true
|
||||
},
|
||||
"RejectJobRegistration": false,
|
||||
"SchedulerAlgorithm": "binpack"
|
||||
}
|
||||
}
|
||||
```
|
||||
|
|
@ -64,9 +66,23 @@ $ curl \
|
|||
- `SchedulerConfig` `(SchedulerConfig)` - The returned `SchedulerConfig` object has configuration
|
||||
settings mentioned below.
|
||||
|
||||
- `SchedulerAlgorithm` `(string: "binpack")` - Specifies whether scheduler binpacks or spreads allocations on available nodes.
|
||||
- `SchedulerAlgorithm` `(string: "binpack")` - Specifies whether scheduler
|
||||
binpacks or spreads allocations on available nodes.
|
||||
|
||||
- `MemoryOversubscriptionEnabled` `(bool: false)` <sup>1.1 Beta</sup> - When `true`, tasks may exceed their reserved memory limit, if the client has excess memory capacity. Tasks must specify [`memory_max`](/docs/job-specification/resources#memory_max) to take advantage of memory oversubscription.
|
||||
- `MemoryOversubscriptionEnabled` `(bool: false)` <sup>1.1 Beta</sup> - When
|
||||
`true`, tasks may exceed their reserved memory limit, if the client has excess
|
||||
memory capacity. Tasks must specify [`memory_max`](/docs/job-specification/resources#memory_max)
|
||||
to take advantage of memory oversubscription.
|
||||
|
||||
- `RejectJobRegistration` `(bool: false)` - When `true`, the server will return
|
||||
permission denied errors for job registration, job dispatch, and job scale APIs,
|
||||
unless the ACL token for the request is a management token. If ACLs are disabled,
|
||||
no user will be able to register jobs. This allows operators to shed load from
|
||||
automated processes during incident response.
|
||||
|
||||
- `PauseEvalBroker` `(bool: false)` - When set to `true`, the eval broker which
|
||||
usually runs on the leader will be disabled. This will prevent the scheduler
|
||||
workers from receiving new work.
|
||||
|
||||
- `PreemptionConfig` `(PreemptionConfig)` - Options to enable preemption for various schedulers.
|
||||
|
||||
|
|
@ -120,6 +136,7 @@ server state is authoritative.
|
|||
"SchedulerAlgorithm": "spread",
|
||||
"MemoryOversubscriptionEnabled": false,
|
||||
"RejectJobRegistration": false,
|
||||
"PauseEvalBroker": false,
|
||||
"PreemptionConfig": {
|
||||
"SystemSchedulerEnabled": true,
|
||||
"SysBatchSchedulerEnabled": false,
|
||||
|
|
@ -133,9 +150,20 @@ server state is authoritative.
|
|||
binpacks or spreads allocations on available nodes. Possible values are
|
||||
`"binpack"` and `"spread"`
|
||||
|
||||
- `MemoryOversubscriptionEnabled` `(bool: false)` <sup>1.1 Beta</sup> - When `true`, tasks may exceed their reserved memory limit, if the client has excess memory capacity. Tasks must specify [`memory_max`](/docs/job-specification/resources#memory_max) to take advantage of memory oversubscription.
|
||||
- `MemoryOversubscriptionEnabled` `(bool: false)` <sup>1.1 Beta</sup> - When
|
||||
`true`, tasks may exceed their reserved memory limit, if the client has excess
|
||||
memory capacity. Tasks must specify [`memory_max`](/docs/job-specification/resources#memory_max)
|
||||
to take advantage of memory oversubscription.
|
||||
|
||||
- `RejectJobRegistration` `(bool: false)` - When `true`, the server will return permission denied errors for job registration, job dispatch, and job scale APIs, unless the ACL token for the request is a management token. If ACLs are disabled, no user will be able to register jobs. This allows operators to shed load from automated proceses during incident response.
|
||||
- `RejectJobRegistration` `(bool: false)` - When `true`, the server will return
|
||||
permission denied errors for job registration, job dispatch, and job scale APIs,
|
||||
unless the ACL token for the request is a management token. If ACLs are disabled,
|
||||
no user will be able to register jobs. This allows operators to shed load from
|
||||
automated processes during incident response.
|
||||
|
||||
- `PauseEvalBroker` `(bool: false)` - When set to `true`, the eval broker which
|
||||
usually runs on the leader will be disabled. This will prevent the scheduler
|
||||
workers from receiving new work.
|
||||
|
||||
- `PreemptionConfig` `(PreemptionConfig)` - Options to enable preemption for
|
||||
various schedulers.
|
||||
|
|
|
|||
|
|
@ -42,6 +42,12 @@ The following subcommands are available:
|
|||
- [`operator raft remove-peer`][remove] - Remove a Nomad server from the Raft
|
||||
configuration
|
||||
|
||||
- [`operator scheduler get-config`][scheduler-get-config] - Display the current
|
||||
scheduler configuration
|
||||
|
||||
- [`operator scheduler set-config`][scheduler-set-config] - Modify the scheduler
|
||||
configuration
|
||||
|
||||
- [`operator snapshot agent`][snapshot-agent] <EnterpriseAlert inline /> - Inspects a snapshot of the Nomad server state
|
||||
|
||||
- [`operator snapshot save`][snapshot-save] - Saves a snapshot of the Nomad server state
|
||||
|
|
@ -63,3 +69,5 @@ The following subcommands are available:
|
|||
[snapshot-restore]: /docs/commands/operator/snapshot-restore 'Snapshot Restore command'
|
||||
[snapshot-inspect]: /docs/commands/operator/snapshot-inspect 'Snapshot Inspect command'
|
||||
[snapshot-agent]: /docs/commands/operator/snapshot-agent 'Snapshot Agent command'
|
||||
[scheduler-get-config]: /docs/commands/operator/scheduler-get-config 'Scheduler Get Config command'
|
||||
[scheduler-set-config]: /docs/commands/operator/scheduler-set-config 'Scheduler Set Config command'
|
||||
|
|
|
|||
|
|
@ -0,0 +1,47 @@
|
|||
---
|
||||
layout: docs
|
||||
page_title: 'Commands: operator scheduler get-config'
|
||||
description: |
|
||||
Display the current scheduler configuration.
|
||||
---
|
||||
|
||||
# Command: operator scheduler get-config
|
||||
|
||||
The scheduler operator get-config command is used to view the current scheduler
|
||||
configuration.
|
||||
|
||||
## Usage
|
||||
|
||||
```plaintext
|
||||
nomad operator scheduler get-config [options]
|
||||
```
|
||||
|
||||
If ACLs are enabled, this command requires a token with the `operator:read`
|
||||
capability.
|
||||
|
||||
## General Options
|
||||
|
||||
@include 'general_options_no_namespace.mdx'
|
||||
|
||||
## Get Config Options
|
||||
|
||||
- `-json`: Output the scheduler config in its JSON format.
|
||||
|
||||
- `-t`: Format and display the scheduler config using a Go template.
|
||||
|
||||
## Examples
|
||||
|
||||
Display the current scheduler configuration:
|
||||
|
||||
```shell-session
|
||||
$ nomad operator scheduler get-config
|
||||
Scheduler Algorithm = binpack
|
||||
Memory Oversubscription = false
|
||||
Reject Job Registration = false
|
||||
Pause Eval Broker = false
|
||||
Preemption System Scheduler = true
|
||||
Preemption Service Scheduler = false
|
||||
Preemption Batch Scheduler = false
|
||||
Preemption SysBatch Scheduler = false
|
||||
Modify Index = 5
|
||||
```
|
||||
|
|
@ -0,0 +1,82 @@
|
|||
---
|
||||
layout: docs
|
||||
page_title: 'Commands: operator scheduler set-config'
|
||||
description: |
|
||||
Modify the scheduler configuration.
|
||||
---
|
||||
|
||||
# Command: operator scheduler set-config
|
||||
|
||||
The scheduler operator set-config command is used to modify the scheduler
|
||||
configuration.
|
||||
|
||||
## Usage
|
||||
|
||||
```plaintext
|
||||
nomad operator scheduler set-config [options]
|
||||
```
|
||||
|
||||
If ACLs are enabled, this command requires a token with the `operator:write`
|
||||
capability.
|
||||
|
||||
## General Options
|
||||
|
||||
@include 'general_options_no_namespace.mdx'
|
||||
|
||||
## Set Config Options
|
||||
|
||||
- `-check-index` - If set, the scheduler config is only updated if the passed
|
||||
modify index matches the current server side version. If a non-zero value is
|
||||
passed, it ensures that the scheduler config is being updated from a known
|
||||
state.
|
||||
|
||||
- `-scheduler-algorithm` - Specifies whether scheduler binpacks or spreads
|
||||
allocations on available nodes. Must be one of `["binpack"|"spread"]`.
|
||||
|
||||
- `-memory-oversubscription` - When true, tasks may exceed their reserved memory
|
||||
limit, if the client has excess memory capacity. Tasks must specify [`memory_max`]
|
||||
to take advantage of memory oversubscription. Must be one of `[true|false]`.
|
||||
|
||||
- `-reject-job-registration` - When true, the server will return permission denied
|
||||
errors for job registration, job dispatch, and job scale APIs, unless the ACL
|
||||
token for the request is a management token. If ACLs are disabled, no user
|
||||
will be able to register jobs. This allows operators to shed load from automated
|
||||
processes during incident response. Must be one of `[true|false]`.
|
||||
|
||||
- `-pause-eval-broker` - When set to true, the eval broker which usually runs on
|
||||
the leader will be disabled. This will prevent the scheduler workers from
|
||||
receiving new work. Must be one of `[true|false]`.
|
||||
|
||||
- `-preempt-batch-scheduler` - Specifies whether preemption for batch jobs
|
||||
is enabled. Note that if this is set to true, then batch jobs can preempt any
|
||||
other jobs. Must be one of `[true|false]`.
|
||||
|
||||
- `-preempt-service-scheduler` - Specifies whether preemption for service jobs
|
||||
is enabled. Note that if this is set to true, then service jobs can preempt any
|
||||
other jobs. Must be one of `[true|false]`.
|
||||
|
||||
- `-preempt-sysbatch-scheduler` - Specifies whether preemption for system batch
|
||||
jobs is enabled. Note that if this is set to true, then system batch jobs can
|
||||
preempt any other jobs. Must be one of `[true|false]`.
|
||||
|
||||
- `-preempt-system-scheduler` - Specifies whether preemption for system jobs
|
||||
is enabled. Note that if this is set to true, then system jobs can preempt any
|
||||
other jobs. Must be one of `[true|false]`.
|
||||
|
||||
## Examples
|
||||
|
||||
Modify the scheduler algorithm to spread:
|
||||
|
||||
```shell-session
|
||||
$ nomad operator scheduler set-config -scheduler-algorithm=spread
|
||||
Scheduler configuration updated!
|
||||
```
|
||||
|
||||
Modify the scheduler algorithm to spread using the check index flag:
|
||||
|
||||
```shell-session
|
||||
$ nomad operator scheduler set-config -scheduler-algorithm=spread -check-index=5
|
||||
Scheduler configuration updated!
|
||||
```
|
||||
|
||||
[`memory_max`]: /docs/job-specification/resources#memory_max
|
||||
|
|
@ -312,10 +312,9 @@ job-type schedulers.
|
|||
server {
|
||||
default_scheduler_config {
|
||||
scheduler_algorithm = "spread"
|
||||
|
||||
memory_oversubscription_enabled = true
|
||||
|
||||
reject_job_registration = false
|
||||
pause_eval_broker = false # New in Nomad 1.3.2
|
||||
|
||||
preemption_config {
|
||||
batch_scheduler_enabled = true
|
||||
|
|
|
|||
|
|
@ -585,6 +585,14 @@
|
|||
"title": "raft state",
|
||||
"path": "commands/operator/raft-state"
|
||||
},
|
||||
{
|
||||
"title": "scheduler get-config",
|
||||
"path": "commands/operator/scheduler-get-config"
|
||||
},
|
||||
{
|
||||
"title": "scheduler set-config",
|
||||
"path": "commands/operator/scheduler-set-config"
|
||||
},
|
||||
{
|
||||
"title": "snapshot agent",
|
||||
"path": "commands/operator/snapshot-agent"
|
||||
|
|
|
|||
Loading…
Reference in New Issue