619 lines
17 KiB
Go
619 lines
17 KiB
Go
package drainer
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import (
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"context"
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"testing"
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"time"
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"github.com/hashicorp/nomad/helper"
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"github.com/hashicorp/nomad/helper/testlog"
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"github.com/hashicorp/nomad/nomad/mock"
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"github.com/hashicorp/nomad/nomad/state"
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"github.com/hashicorp/nomad/nomad/structs"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"golang.org/x/time/rate"
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)
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func testNodes(t *testing.T, state *state.StateStore) (drainingNode, runningNode *structs.Node) {
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n1 := mock.Node()
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n1.Name = "draining"
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n1.DrainStrategy = &structs.DrainStrategy{
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DrainSpec: structs.DrainSpec{
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Deadline: time.Minute,
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},
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ForceDeadline: time.Now().Add(time.Minute),
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}
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require.Nil(t, state.UpsertNode(100, n1))
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// Create a non-draining node
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n2 := mock.Node()
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n2.Name = "running"
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require.Nil(t, state.UpsertNode(101, n2))
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return n1, n2
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}
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func testDrainingJobWatcher(t *testing.T, state *state.StateStore) (*drainingJobWatcher, context.CancelFunc) {
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t.Helper()
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limiter := rate.NewLimiter(100.0, 100)
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logger := testlog.Logger(t)
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ctx, cancel := context.WithCancel(context.Background())
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w := NewDrainingJobWatcher(ctx, limiter, state, logger)
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return w, cancel
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}
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// TestDrainingJobWatcher_Interface is a compile-time assertion that we
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// implement the intended interface.
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func TestDrainingJobWatcher_Interface(t *testing.T) {
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w, cancel := testDrainingJobWatcher(t, state.TestStateStore(t))
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cancel()
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var _ DrainingJobWatcher = w
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}
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// asertJobWatcherOps asserts a certain number of allocs are drained and/or
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// migrated by the job watcher.
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func assertJobWatcherOps(t *testing.T, jw DrainingJobWatcher, drained, migrated int) (
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*DrainRequest, []*structs.Allocation) {
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t.Helper()
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var (
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drains *DrainRequest
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migrations []*structs.Allocation
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drainsChecked, migrationsChecked bool
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)
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for {
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select {
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case drains = <-jw.Drain():
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ids := make([]string, len(drains.Allocs))
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for i, a := range drains.Allocs {
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ids[i] = a.JobID[:6] + ":" + a.ID[:6]
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}
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t.Logf("draining %d allocs: %v", len(ids), ids)
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require.False(t, drainsChecked, "drains already received")
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drainsChecked = true
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require.Lenf(t, drains.Allocs, drained,
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"expected %d drains but found %d", drained, len(drains.Allocs))
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case migrations = <-jw.Migrated():
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ids := make([]string, len(migrations))
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for i, a := range migrations {
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ids[i] = a.JobID[:6] + ":" + a.ID[:6]
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}
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t.Logf("migrating %d allocs: %v", len(ids), ids)
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require.False(t, migrationsChecked, "migrations already received")
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migrationsChecked = true
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require.Lenf(t, migrations, migrated,
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"expected %d migrations but found %d", migrated, len(migrations))
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case <-time.After(10 * time.Millisecond):
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if !drainsChecked && drained > 0 {
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t.Fatalf("expected %d drains but none happened", drained)
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}
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if !migrationsChecked && migrated > 0 {
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t.Fatalf("expected %d migrations but none happened", migrated)
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}
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return drains, migrations
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}
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}
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}
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// TestDrainingJobWatcher_DrainJobs asserts DrainingJobWatcher batches
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// allocation changes from multiple jobs.
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func TestDrainingJobWatcher_DrainJobs(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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state := state.TestStateStore(t)
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jobWatcher, cancelWatcher := testDrainingJobWatcher(t, state)
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defer cancelWatcher()
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drainingNode, runningNode := testNodes(t, state)
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var index uint64 = 101
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count := 8
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newAlloc := func(node *structs.Node, job *structs.Job) *structs.Allocation {
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a := mock.Alloc()
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a.JobID = job.ID
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a.Job = job
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a.TaskGroup = job.TaskGroups[0].Name
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a.NodeID = node.ID
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return a
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}
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// 2 jobs with count 10, max parallel 3
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jnss := make([]structs.NamespacedID, 2)
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jobs := make([]*structs.Job, 2)
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for i := 0; i < 2; i++ {
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job := mock.Job()
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jobs[i] = job
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jnss[i] = structs.NamespacedID{Namespace: job.Namespace, ID: job.ID}
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job.TaskGroups[0].Migrate.MaxParallel = 3
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job.TaskGroups[0].Count = count
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require.Nil(state.UpsertJob(index, job))
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index++
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var allocs []*structs.Allocation
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for i := 0; i < count; i++ {
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a := newAlloc(drainingNode, job)
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a.DeploymentStatus = &structs.AllocDeploymentStatus{
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Healthy: helper.BoolToPtr(true),
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}
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allocs = append(allocs, a)
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}
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require.Nil(state.UpsertAllocs(index, allocs))
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index++
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}
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// Only register jobs with watcher after creating all data models as
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// once the watcher starts we need to track the index carefully for
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// updating the batch future
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jobWatcher.RegisterJobs(jnss)
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// Expect a first batch of MaxParallel allocs from each job
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drains, _ := assertJobWatcherOps(t, jobWatcher, 6, 0)
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// Fake migrating the drained allocs by starting new ones and stopping
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// the old ones
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drainedAllocs := make([]*structs.Allocation, len(drains.Allocs))
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for i, a := range drains.Allocs {
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a.DesiredTransition.Migrate = helper.BoolToPtr(true)
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// create a copy so we can reuse this slice
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drainedAllocs[i] = a.Copy()
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}
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require.Nil(state.UpsertAllocs(index, drainedAllocs))
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drains.Resp.Respond(index, nil)
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index++
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// Just setting ShouldMigrate should not cause any further drains
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assertJobWatcherOps(t, jobWatcher, 0, 0)
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// Proceed our fake migration along by creating new allocs and stopping
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// old ones
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replacements := make([]*structs.Allocation, len(drainedAllocs))
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updates := make([]*structs.Allocation, 0, len(drainedAllocs)*2)
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for i, a := range drainedAllocs {
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// Stop drained allocs
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a.DesiredTransition.Migrate = nil
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a.DesiredStatus = structs.AllocDesiredStatusStop
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// Create a replacement
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replacement := mock.Alloc()
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replacement.JobID = a.Job.ID
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replacement.Job = a.Job
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replacement.TaskGroup = a.TaskGroup
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replacement.NodeID = runningNode.ID
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// start in pending state with no health status
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updates = append(updates, a, replacement)
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replacements[i] = replacement.Copy()
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}
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require.Nil(state.UpsertAllocs(index, updates))
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index++
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// The drained allocs stopping cause migrations but no new drains
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// because the replacements have not started
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assertJobWatcherOps(t, jobWatcher, 0, 6)
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// Finally kickoff further drain activity by "starting" replacements
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for _, a := range replacements {
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a.ClientStatus = structs.AllocClientStatusRunning
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a.DeploymentStatus = &structs.AllocDeploymentStatus{
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Healthy: helper.BoolToPtr(true),
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}
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}
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require.Nil(state.UpsertAllocs(index, replacements))
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index++
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require.NotEmpty(jobWatcher.drainingJobs())
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// 6 new drains
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drains, _ = assertJobWatcherOps(t, jobWatcher, 6, 0)
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// Fake migrations once more to finish the drain
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drainedAllocs = make([]*structs.Allocation, len(drains.Allocs))
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for i, a := range drains.Allocs {
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a.DesiredTransition.Migrate = helper.BoolToPtr(true)
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// create a copy so we can reuse this slice
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drainedAllocs[i] = a.Copy()
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}
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require.Nil(state.UpsertAllocs(index, drainedAllocs))
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drains.Resp.Respond(index, nil)
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index++
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assertJobWatcherOps(t, jobWatcher, 0, 0)
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replacements = make([]*structs.Allocation, len(drainedAllocs))
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updates = make([]*structs.Allocation, 0, len(drainedAllocs)*2)
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for i, a := range drainedAllocs {
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a.DesiredTransition.Migrate = nil
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a.DesiredStatus = structs.AllocDesiredStatusStop
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replacement := newAlloc(runningNode, a.Job)
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updates = append(updates, a, replacement)
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replacements[i] = replacement.Copy()
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}
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require.Nil(state.UpsertAllocs(index, updates))
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index++
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assertJobWatcherOps(t, jobWatcher, 0, 6)
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for _, a := range replacements {
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a.ClientStatus = structs.AllocClientStatusRunning
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a.DeploymentStatus = &structs.AllocDeploymentStatus{
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Healthy: helper.BoolToPtr(true),
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}
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}
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require.Nil(state.UpsertAllocs(index, replacements))
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index++
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require.NotEmpty(jobWatcher.drainingJobs())
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// Final 4 new drains
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drains, _ = assertJobWatcherOps(t, jobWatcher, 4, 0)
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// Fake migrations once more to finish the drain
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drainedAllocs = make([]*structs.Allocation, len(drains.Allocs))
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for i, a := range drains.Allocs {
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a.DesiredTransition.Migrate = helper.BoolToPtr(true)
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// create a copy so we can reuse this slice
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drainedAllocs[i] = a.Copy()
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}
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require.Nil(state.UpsertAllocs(index, drainedAllocs))
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drains.Resp.Respond(index, nil)
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index++
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assertJobWatcherOps(t, jobWatcher, 0, 0)
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replacements = make([]*structs.Allocation, len(drainedAllocs))
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updates = make([]*structs.Allocation, 0, len(drainedAllocs)*2)
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for i, a := range drainedAllocs {
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a.DesiredTransition.Migrate = nil
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a.DesiredStatus = structs.AllocDesiredStatusStop
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replacement := newAlloc(runningNode, a.Job)
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updates = append(updates, a, replacement)
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replacements[i] = replacement.Copy()
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}
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require.Nil(state.UpsertAllocs(index, updates))
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index++
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assertJobWatcherOps(t, jobWatcher, 0, 4)
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for _, a := range replacements {
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a.ClientStatus = structs.AllocClientStatusRunning
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a.DeploymentStatus = &structs.AllocDeploymentStatus{
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Healthy: helper.BoolToPtr(true),
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}
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}
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require.Nil(state.UpsertAllocs(index, replacements))
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// No jobs should be left!
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require.Empty(jobWatcher.drainingJobs())
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}
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// DrainingJobWatcher tests:
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// TODO Test that the watcher cancels its query when a new job is registered
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// handleTaskGroupTestCase is the test case struct for TestHandleTaskGroup
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//
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// Two nodes will be initialized: one draining and one running.
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type handleTaskGroupTestCase struct {
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// Name of test
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Name string
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// Expectations
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ExpectedDrained int
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ExpectedMigrated int
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ExpectedDone bool
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// Count overrides the default count of 10 if set
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Count int
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// MaxParallel overrides the default max_parallel of 1 if set
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MaxParallel int
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// AddAlloc will be called 10 times to create test allocs
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//
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// Allocs default to be healthy on the draining node
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AddAlloc func(i int, a *structs.Allocation, drainingID, runningID string)
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}
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func TestHandeTaskGroup_Table(t *testing.T) {
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cases := []handleTaskGroupTestCase{
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{
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// All allocs on draining node
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Name: "AllDraining",
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ExpectedDrained: 1,
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ExpectedMigrated: 0,
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ExpectedDone: false,
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},
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{
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// All allocs on non-draining node
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Name: "AllNonDraining",
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ExpectedDrained: 0,
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ExpectedMigrated: 0,
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ExpectedDone: true,
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AddAlloc: func(i int, a *structs.Allocation, drainingID, runningID string) {
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a.NodeID = runningID
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},
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},
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{
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// Some allocs on non-draining node but not healthy
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Name: "SomeNonDrainingUnhealthy",
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ExpectedDrained: 0,
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ExpectedMigrated: 0,
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ExpectedDone: false,
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AddAlloc: func(i int, a *structs.Allocation, drainingID, runningID string) {
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if i%2 == 0 {
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a.NodeID = runningID
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a.DeploymentStatus = nil
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}
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},
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},
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{
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// One draining, other allocs on non-draining node and healthy
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Name: "OneDraining",
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ExpectedDrained: 1,
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ExpectedMigrated: 0,
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ExpectedDone: false,
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AddAlloc: func(i int, a *structs.Allocation, drainingID, runningID string) {
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if i != 0 {
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a.NodeID = runningID
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}
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},
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},
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{
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// One already draining, other allocs on non-draining node and healthy
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Name: "OneAlreadyDraining",
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ExpectedDrained: 0,
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ExpectedMigrated: 0,
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ExpectedDone: false,
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AddAlloc: func(i int, a *structs.Allocation, drainingID, runningID string) {
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if i == 0 {
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a.DesiredTransition.Migrate = helper.BoolToPtr(true)
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return
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}
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a.NodeID = runningID
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},
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},
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{
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// One already drained, other allocs on non-draining node and healthy
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Name: "OneAlreadyDrained",
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ExpectedDrained: 0,
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ExpectedMigrated: 1,
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ExpectedDone: true,
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AddAlloc: func(i int, a *structs.Allocation, drainingID, runningID string) {
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if i == 0 {
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a.DesiredStatus = structs.AllocDesiredStatusStop
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return
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}
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a.NodeID = runningID
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},
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},
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{
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// All allocs are terminl, nothing to be drained
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Name: "AllMigrating",
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ExpectedDrained: 0,
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ExpectedMigrated: 10,
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ExpectedDone: true,
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AddAlloc: func(i int, a *structs.Allocation, drainingID, runningID string) {
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a.DesiredStatus = structs.AllocDesiredStatusStop
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},
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},
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{
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// All allocs may be drained at once
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Name: "AllAtOnce",
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ExpectedDrained: 10,
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ExpectedMigrated: 0,
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ExpectedDone: false,
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MaxParallel: 10,
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},
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{
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// Drain 2
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Name: "Drain2",
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ExpectedDrained: 2,
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ExpectedMigrated: 0,
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ExpectedDone: false,
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MaxParallel: 2,
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},
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{
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// One on new node, one drained, and one draining
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ExpectedDrained: 1,
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ExpectedMigrated: 1,
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MaxParallel: 2,
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AddAlloc: func(i int, a *structs.Allocation, drainingID, runningID string) {
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switch i {
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case 0:
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// One alloc on running node
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a.NodeID = runningID
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case 1:
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// One alloc already migrated
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a.DesiredStatus = structs.AllocDesiredStatusStop
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}
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},
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},
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{
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// 8 on new node, one drained, and one draining
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ExpectedDrained: 1,
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ExpectedMigrated: 1,
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MaxParallel: 2,
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AddAlloc: func(i int, a *structs.Allocation, drainingID, runningID string) {
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switch i {
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case 0, 1, 2, 3, 4, 5, 6, 7:
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a.NodeID = runningID
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case 8:
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a.DesiredStatus = structs.AllocDesiredStatusStop
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}
|
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},
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},
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{
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// 5 on new node, two drained, and three draining
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ExpectedDrained: 3,
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ExpectedMigrated: 2,
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MaxParallel: 5,
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AddAlloc: func(i int, a *structs.Allocation, drainingID, runningID string) {
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switch i {
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case 0, 1, 2, 3, 4:
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a.NodeID = runningID
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case 8, 9:
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a.DesiredStatus = structs.AllocDesiredStatusStop
|
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}
|
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},
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},
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{
|
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// Not all on new node have health set
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Name: "PendingHealth",
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ExpectedDrained: 1,
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ExpectedMigrated: 1,
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MaxParallel: 3,
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AddAlloc: func(i int, a *structs.Allocation, drainingID, runningID string) {
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switch i {
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case 0:
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// Deployment status UNset for 1 on new node
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a.NodeID = runningID
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a.DeploymentStatus = nil
|
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case 1, 2, 3, 4:
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// Deployment status set for 4 on new node
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a.NodeID = runningID
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case 9:
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a.DesiredStatus = structs.AllocDesiredStatusStop
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}
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},
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},
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{
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// 5 max parallel - 1 migrating - 2 with unset health = 2 drainable
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Name: "PendingHealthHigherMax",
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ExpectedDrained: 2,
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ExpectedMigrated: 1,
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MaxParallel: 5,
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AddAlloc: func(i int, a *structs.Allocation, drainingID, runningID string) {
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switch i {
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case 0, 1:
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// Deployment status UNset for 2 on new node
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a.NodeID = runningID
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a.DeploymentStatus = nil
|
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case 2, 3, 4:
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// Deployment status set for 3 on new node
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a.NodeID = runningID
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case 9:
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a.DesiredStatus = structs.AllocDesiredStatusStop
|
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}
|
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},
|
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},
|
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}
|
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|
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for _, testCase := range cases {
|
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t.Run(testCase.Name, func(t *testing.T) {
|
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testHandleTaskGroup(t, testCase)
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})
|
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}
|
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}
|
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|
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func testHandleTaskGroup(t *testing.T, tc handleTaskGroupTestCase) {
|
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t.Parallel()
|
|
require := require.New(t)
|
|
assert := assert.New(t)
|
|
|
|
// Create nodes
|
|
state := state.TestStateStore(t)
|
|
drainingNode, runningNode := testNodes(t, state)
|
|
|
|
job := mock.Job()
|
|
job.TaskGroups[0].Count = 10
|
|
if tc.Count > 0 {
|
|
job.TaskGroups[0].Count = tc.Count
|
|
}
|
|
if tc.MaxParallel > 0 {
|
|
job.TaskGroups[0].Migrate.MaxParallel = tc.MaxParallel
|
|
}
|
|
require.Nil(state.UpsertJob(102, job))
|
|
|
|
var allocs []*structs.Allocation
|
|
for i := 0; i < 10; i++ {
|
|
a := mock.Alloc()
|
|
a.JobID = job.ID
|
|
a.Job = job
|
|
a.TaskGroup = job.TaskGroups[0].Name
|
|
|
|
// Default to being healthy on the draining node
|
|
a.NodeID = drainingNode.ID
|
|
a.DeploymentStatus = &structs.AllocDeploymentStatus{
|
|
Healthy: helper.BoolToPtr(true),
|
|
}
|
|
if tc.AddAlloc != nil {
|
|
tc.AddAlloc(i, a, drainingNode.ID, runningNode.ID)
|
|
}
|
|
allocs = append(allocs, a)
|
|
}
|
|
|
|
require.Nil(state.UpsertAllocs(103, allocs))
|
|
snap, err := state.Snapshot()
|
|
require.Nil(err)
|
|
|
|
res := newJobResult()
|
|
require.Nil(handleTaskGroup(snap, job.TaskGroups[0], allocs, 102, res))
|
|
assert.Lenf(res.drain, tc.ExpectedDrained, "Drain expected %d but found: %d",
|
|
tc.ExpectedDrained, len(res.drain))
|
|
assert.Lenf(res.migrated, tc.ExpectedMigrated, "Migrate expected %d but found: %d",
|
|
tc.ExpectedMigrated, len(res.migrated))
|
|
assert.Equal(tc.ExpectedDone, res.done)
|
|
}
|
|
|
|
func TestHandleTaskGroup_Migrations(t *testing.T) {
|
|
t.Parallel()
|
|
require := require.New(t)
|
|
|
|
// Create a draining node
|
|
state := state.TestStateStore(t)
|
|
n := mock.Node()
|
|
n.DrainStrategy = &structs.DrainStrategy{
|
|
DrainSpec: structs.DrainSpec{
|
|
Deadline: 5 * time.Minute,
|
|
},
|
|
ForceDeadline: time.Now().Add(1 * time.Minute),
|
|
}
|
|
require.Nil(state.UpsertNode(100, n))
|
|
|
|
job := mock.Job()
|
|
require.Nil(state.UpsertJob(101, job))
|
|
|
|
// Create 10 done allocs
|
|
var allocs []*structs.Allocation
|
|
for i := 0; i < 10; i++ {
|
|
a := mock.Alloc()
|
|
a.Job = job
|
|
a.TaskGroup = job.TaskGroups[0].Name
|
|
a.NodeID = n.ID
|
|
a.DeploymentStatus = &structs.AllocDeploymentStatus{
|
|
Healthy: helper.BoolToPtr(false),
|
|
}
|
|
|
|
if i%2 == 0 {
|
|
a.DesiredStatus = structs.AllocDesiredStatusStop
|
|
} else {
|
|
a.ClientStatus = structs.AllocClientStatusFailed
|
|
}
|
|
allocs = append(allocs, a)
|
|
}
|
|
require.Nil(state.UpsertAllocs(102, allocs))
|
|
|
|
snap, err := state.Snapshot()
|
|
require.Nil(err)
|
|
|
|
// Handle before and after indexes
|
|
res := newJobResult()
|
|
require.Nil(handleTaskGroup(snap, job.TaskGroups[0], allocs, 101, res))
|
|
require.Empty(res.drain)
|
|
require.Len(res.migrated, 10)
|
|
require.True(res.done)
|
|
|
|
res = newJobResult()
|
|
require.Nil(handleTaskGroup(snap, job.TaskGroups[0], allocs, 103, res))
|
|
require.Empty(res.drain)
|
|
require.Empty(res.migrated)
|
|
require.True(res.done)
|
|
}
|