453 lines
13 KiB
Go
453 lines
13 KiB
Go
package command
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import (
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"bytes"
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"fmt"
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"strings"
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"testing"
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"time"
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"github.com/hashicorp/nomad/api"
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"github.com/hashicorp/nomad/command/agent"
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"github.com/hashicorp/nomad/helper"
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"github.com/hashicorp/nomad/testutil"
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"github.com/mitchellh/cli"
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"github.com/posener/complete"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestNodeDrainCommand_Implements(t *testing.T) {
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t.Parallel()
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var _ cli.Command = &NodeDrainCommand{}
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}
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func TestNodeDrainCommand_Detach(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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server, client, url := testServer(t, true, func(c *agent.Config) {
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c.NodeName = "drain_detach_node"
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})
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defer server.Shutdown()
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// Wait for a node to appear
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var nodeID string
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testutil.WaitForResult(func() (bool, error) {
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nodes, _, err := client.Nodes().List(nil)
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if err != nil {
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return false, err
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}
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if len(nodes) == 0 {
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return false, fmt.Errorf("missing node")
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}
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nodeID = nodes[0].ID
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return true, nil
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}, func(err error) {
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t.Fatalf("err: %s", err)
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})
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// Register a job to create an alloc to drain that will block draining
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job := &api.Job{
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ID: helper.StringToPtr("mock_service"),
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Name: helper.StringToPtr("mock_service"),
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Datacenters: []string{"dc1"},
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TaskGroups: []*api.TaskGroup{
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{
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Name: helper.StringToPtr("mock_group"),
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Tasks: []*api.Task{
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{
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Name: "mock_task",
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Driver: "mock_driver",
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Config: map[string]interface{}{
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"run_for": "10m",
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},
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},
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},
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},
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},
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}
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_, _, err := client.Jobs().Register(job, nil)
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require.Nil(err)
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testutil.WaitForResult(func() (bool, error) {
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allocs, _, err := client.Nodes().Allocations(nodeID, nil)
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if err != nil {
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return false, err
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}
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return len(allocs) > 0, fmt.Errorf("no allocs")
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}, func(err error) {
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t.Fatalf("err: %v", err)
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})
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ui := new(cli.MockUi)
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cmd := &NodeDrainCommand{Meta: Meta{Ui: ui}}
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if code := cmd.Run([]string{"-address=" + url, "-self", "-enable", "-detach"}); code != 0 {
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t.Fatalf("expected exit 0, got: %d", code)
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}
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out := ui.OutputWriter.String()
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expected := "drain strategy set"
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require.Contains(out, expected)
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node, _, err := client.Nodes().Info(nodeID, nil)
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require.Nil(err)
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require.NotNil(node.DrainStrategy)
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}
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func TestNodeDrainCommand_Monitor(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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server, client, url := testServer(t, true, func(c *agent.Config) {
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c.NodeName = "drain_monitor_node"
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})
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defer server.Shutdown()
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// Wait for a node to appear
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var nodeID string
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testutil.WaitForResult(func() (bool, error) {
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nodes, _, err := client.Nodes().List(nil)
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if err != nil {
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return false, err
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}
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if len(nodes) == 0 {
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return false, fmt.Errorf("missing node")
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}
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if _, ok := nodes[0].Drivers["mock_driver"]; !ok {
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return false, fmt.Errorf("mock_driver not ready")
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}
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nodeID = nodes[0].ID
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return true, nil
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}, func(err error) {
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t.Fatalf("err: %s", err)
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})
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// Register a service job to create allocs to drain
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serviceCount := 3
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job := &api.Job{
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ID: helper.StringToPtr("mock_service"),
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Name: helper.StringToPtr("mock_service"),
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Datacenters: []string{"dc1"},
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Type: helper.StringToPtr("service"),
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TaskGroups: []*api.TaskGroup{
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{
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Name: helper.StringToPtr("mock_group"),
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Count: &serviceCount,
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Migrate: &api.MigrateStrategy{
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MaxParallel: helper.IntToPtr(1),
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HealthCheck: helper.StringToPtr("task_states"),
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MinHealthyTime: helper.TimeToPtr(10 * time.Millisecond),
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HealthyDeadline: helper.TimeToPtr(5 * time.Minute),
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},
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Tasks: []*api.Task{
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{
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Name: "mock_task",
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Driver: "mock_driver",
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Config: map[string]interface{}{
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"run_for": "10m",
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},
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Resources: &api.Resources{
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CPU: helper.IntToPtr(50),
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MemoryMB: helper.IntToPtr(50),
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},
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},
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},
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},
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},
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}
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_, _, err := client.Jobs().Register(job, nil)
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require.Nil(err)
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// Register a system job to ensure it is ignored during draining
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sysjob := &api.Job{
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ID: helper.StringToPtr("mock_system"),
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Name: helper.StringToPtr("mock_system"),
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Datacenters: []string{"dc1"},
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Type: helper.StringToPtr("system"),
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TaskGroups: []*api.TaskGroup{
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{
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Name: helper.StringToPtr("mock_sysgroup"),
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Count: helper.IntToPtr(1),
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Tasks: []*api.Task{
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{
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Name: "mock_systask",
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Driver: "mock_driver",
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Config: map[string]interface{}{
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"run_for": "10m",
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},
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Resources: &api.Resources{
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CPU: helper.IntToPtr(50),
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MemoryMB: helper.IntToPtr(50),
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},
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},
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},
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},
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},
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}
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_, _, err = client.Jobs().Register(sysjob, nil)
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require.Nil(err)
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var allocs []*api.Allocation
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testutil.WaitForResult(func() (bool, error) {
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allocs, _, err = client.Nodes().Allocations(nodeID, nil)
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if err != nil {
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return false, err
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}
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if len(allocs) != serviceCount+1 {
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return false, fmt.Errorf("number of allocs %d != count (%d)", len(allocs), serviceCount+1)
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}
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for _, a := range allocs {
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if a.ClientStatus != "running" {
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return false, fmt.Errorf("alloc %q still not running: %s", a.ID, a.ClientStatus)
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}
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}
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return true, nil
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}, func(err error) {
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t.Fatalf("err: %v", err)
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})
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outBuf := bytes.NewBuffer(nil)
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ui := &cli.BasicUi{
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Reader: bytes.NewReader(nil),
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Writer: outBuf,
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ErrorWriter: outBuf,
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}
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cmd := &NodeDrainCommand{Meta: Meta{Ui: ui}}
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args := []string{"-address=" + url, "-self", "-enable", "-deadline", "1s", "-ignore-system"}
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t.Logf("Running: %v", args)
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if code := cmd.Run(args); code != 0 {
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t.Fatalf("expected exit 0, got: %d\n%s", code, outBuf.String())
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}
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out := outBuf.String()
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t.Logf("Output:\n%s", out)
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// Unfortunately travis is too slow to reliably see the expected output. The
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// monitor goroutines may start only after some or all the allocs have been
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// migrated.
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if !testutil.IsTravis() {
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require.Contains(out, "marked all allocations for migration")
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for _, a := range allocs {
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if *a.Job.Type == "system" {
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if strings.Contains(out, a.ID) {
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t.Fatalf("output should not contain system alloc %q", a.ID)
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}
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continue
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}
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require.Contains(out, fmt.Sprintf("Alloc %q marked for migration", a.ID))
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require.Contains(out, fmt.Sprintf("Alloc %q draining", a.ID))
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}
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expected := fmt.Sprintf("All allocations on node %q have stopped.\n", nodeID)
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if !strings.HasSuffix(out, expected) {
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t.Fatalf("expected output to end with:\n%s", expected)
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}
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}
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// Test -monitor flag
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outBuf.Reset()
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args = []string{"-address=" + url, "-self", "-monitor", "-ignore-system"}
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t.Logf("Running: %v", args)
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if code := cmd.Run(args); code != 0 {
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t.Fatalf("expected exit 0, got: %d\n%s", code, outBuf.String())
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}
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out = outBuf.String()
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t.Logf("Output:\n%s", out)
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require.Contains(out, "No drain strategy set")
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}
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func TestNodeDrainCommand_Monitor_NoDrainStrategy(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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server, client, url := testServer(t, true, func(c *agent.Config) {
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c.NodeName = "drain_monitor_node2"
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})
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defer server.Shutdown()
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// Wait for a node to appear
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testutil.WaitForResult(func() (bool, error) {
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nodes, _, err := client.Nodes().List(nil)
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if err != nil {
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return false, err
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}
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if len(nodes) == 0 {
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return false, fmt.Errorf("missing node")
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}
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return true, nil
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}, func(err error) {
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t.Fatalf("err: %s", err)
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})
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// Test -monitor flag
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outBuf := bytes.NewBuffer(nil)
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ui := &cli.BasicUi{
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Reader: bytes.NewReader(nil),
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Writer: outBuf,
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ErrorWriter: outBuf,
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}
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cmd := &NodeDrainCommand{Meta: Meta{Ui: ui}}
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args := []string{"-address=" + url, "-self", "-monitor", "-ignore-system"}
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t.Logf("Running: %v", args)
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if code := cmd.Run(args); code != 0 {
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t.Fatalf("expected exit 0, got: %d\n%s", code, outBuf.String())
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}
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out := outBuf.String()
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t.Logf("Output:\n%s", out)
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require.Contains(out, "Monitoring node")
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require.Contains(out, "No drain strategy set")
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}
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func TestNodeDrainCommand_Fails(t *testing.T) {
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t.Parallel()
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srv, _, url := testServer(t, false, nil)
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defer srv.Shutdown()
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ui := new(cli.MockUi)
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cmd := &NodeDrainCommand{Meta: Meta{Ui: ui}}
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// Fails on misuse
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if code := cmd.Run([]string{"some", "bad", "args"}); code != 1 {
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t.Fatalf("expected exit code 1, got: %d", code)
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}
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if out := ui.ErrorWriter.String(); !strings.Contains(out, commandErrorText(cmd)) {
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t.Fatalf("expected help output, got: %s", out)
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}
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ui.ErrorWriter.Reset()
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// Fails on connection failure
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if code := cmd.Run([]string{"-address=nope", "-enable", "12345678-abcd-efab-cdef-123456789abc"}); code != 1 {
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t.Fatalf("expected exit code 1, got: %d", code)
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}
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if out := ui.ErrorWriter.String(); !strings.Contains(out, "Error toggling") {
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t.Fatalf("expected failed toggle error, got: %s", out)
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}
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ui.ErrorWriter.Reset()
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// Fails on nonexistent node
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if code := cmd.Run([]string{"-address=" + url, "-enable", "12345678-abcd-efab-cdef-123456789abc"}); code != 1 {
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t.Fatalf("expected exit 1, got: %d", code)
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}
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if out := ui.ErrorWriter.String(); !strings.Contains(out, "No node(s) with prefix or id") {
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t.Fatalf("expected not exist error, got: %s", out)
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}
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ui.ErrorWriter.Reset()
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// Fails if both enable and disable specified
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if code := cmd.Run([]string{"-enable", "-disable", "12345678-abcd-efab-cdef-123456789abc"}); code != 1 {
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t.Fatalf("expected exit 1, got: %d", code)
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}
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if out := ui.ErrorWriter.String(); !strings.Contains(out, commandErrorText(cmd)) {
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t.Fatalf("expected help output, got: %s", out)
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}
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ui.ErrorWriter.Reset()
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// Fails if neither enable or disable specified
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if code := cmd.Run([]string{"12345678-abcd-efab-cdef-123456789abc"}); code != 1 {
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t.Fatalf("expected exit 1, got: %d", code)
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}
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if out := ui.ErrorWriter.String(); !strings.Contains(out, commandErrorText(cmd)) {
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t.Fatalf("expected help output, got: %s", out)
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}
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ui.ErrorWriter.Reset()
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// Fail on identifier with too few characters
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if code := cmd.Run([]string{"-address=" + url, "-enable", "1"}); code != 1 {
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t.Fatalf("expected exit 1, got: %d", code)
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}
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if out := ui.ErrorWriter.String(); !strings.Contains(out, "must contain at least two characters.") {
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t.Fatalf("expected too few characters error, got: %s", out)
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}
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ui.ErrorWriter.Reset()
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// Identifiers with uneven length should produce a query result
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if code := cmd.Run([]string{"-address=" + url, "-enable", "123"}); code != 1 {
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t.Fatalf("expected exit 1, got: %d", code)
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}
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if out := ui.ErrorWriter.String(); !strings.Contains(out, "No node(s) with prefix or id") {
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t.Fatalf("expected not exist error, got: %s", out)
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}
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ui.ErrorWriter.Reset()
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// Fail on disable being used with drain strategy flags
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for _, flag := range []string{"-force", "-no-deadline", "-ignore-system"} {
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if code := cmd.Run([]string{"-address=" + url, "-disable", flag, "12345678-abcd-efab-cdef-123456789abc"}); code != 1 {
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t.Fatalf("expected exit 1, got: %d", code)
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}
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if out := ui.ErrorWriter.String(); !strings.Contains(out, "combined with flags configuring drain strategy") {
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t.Fatalf("got: %s", out)
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}
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ui.ErrorWriter.Reset()
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}
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// Fail on setting a deadline plus deadline modifying flags
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for _, flag := range []string{"-force", "-no-deadline"} {
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if code := cmd.Run([]string{"-address=" + url, "-enable", "-deadline=10s", flag, "12345678-abcd-efab-cdef-123456789abc"}); code != 1 {
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t.Fatalf("expected exit 1, got: %d", code)
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}
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if out := ui.ErrorWriter.String(); !strings.Contains(out, "deadline can't be combined with") {
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t.Fatalf("got: %s", out)
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}
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ui.ErrorWriter.Reset()
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}
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// Fail on setting a force and no deadline
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if code := cmd.Run([]string{"-address=" + url, "-enable", "-force", "-no-deadline", "12345678-abcd-efab-cdef-123456789abc"}); code != 1 {
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t.Fatalf("expected exit 1, got: %d", code)
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}
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if out := ui.ErrorWriter.String(); !strings.Contains(out, "mutually exclusive") {
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t.Fatalf("got: %s", out)
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}
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ui.ErrorWriter.Reset()
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// Fail on setting a bad deadline
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for _, flag := range []string{"-deadline=0s", "-deadline=-1s"} {
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if code := cmd.Run([]string{"-address=" + url, "-enable", flag, "12345678-abcd-efab-cdef-123456789abc"}); code != 1 {
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t.Fatalf("expected exit 1, got: %d", code)
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}
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if out := ui.ErrorWriter.String(); !strings.Contains(out, "positive") {
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t.Fatalf("got: %s", out)
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}
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ui.ErrorWriter.Reset()
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}
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}
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func TestNodeDrainCommand_AutocompleteArgs(t *testing.T) {
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assert := assert.New(t)
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t.Parallel()
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srv, client, url := testServer(t, true, nil)
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defer srv.Shutdown()
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// Wait for a node to appear
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var nodeID string
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testutil.WaitForResult(func() (bool, error) {
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nodes, _, err := client.Nodes().List(nil)
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if err != nil {
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return false, err
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}
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if len(nodes) == 0 {
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return false, fmt.Errorf("missing node")
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}
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nodeID = nodes[0].ID
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return true, nil
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}, func(err error) {
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t.Fatalf("err: %s", err)
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})
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ui := new(cli.MockUi)
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cmd := &NodeDrainCommand{Meta: Meta{Ui: ui, flagAddress: url}}
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prefix := nodeID[:len(nodeID)-5]
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args := complete.Args{Last: prefix}
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predictor := cmd.AutocompleteArgs()
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res := predictor.Predict(args)
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assert.Equal(1, len(res))
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assert.Equal(nodeID, res[0])
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}
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