lib/dispatchcloud/worker/pool_test.go

   1 // Copyright (C) The Arvados Authors. All rights reserved.
   2 //
   3 // SPDX-License-Identifier: AGPL-3.0
   4
   5 package worker
   6
   7 import (
   8         "sort"
   9         "strings"
  10         "time"
  11
  12         "git.curoverse.com/arvados.git/lib/cloud"
  13         "git.curoverse.com/arvados.git/lib/dispatchcloud/test"
  14         "git.curoverse.com/arvados.git/sdk/go/arvados"
  15         "git.curoverse.com/arvados.git/sdk/go/ctxlog"
  16         "github.com/prometheus/client_golang/prometheus"
  17         check "gopkg.in/check.v1"
  18 )
  19
  20 const GiB arvados.ByteSize = 1 << 30
  21
  22 var _ = check.Suite(&PoolSuite{})
  23
  24 type lessChecker struct {
  25         *check.CheckerInfo
  26 }
  27
  28 func (*lessChecker) Check(params []interface{}, names []string) (result bool, error string) {
  29         return params[0].(int) < params[1].(int), ""
  30 }
  31
  32 var less = &lessChecker{&check.CheckerInfo{Name: "less", Params: []string{"obtained", "expected"}}}
  33
  34 type PoolSuite struct{}
  35
  36 func (suite *PoolSuite) TestResumeAfterRestart(c *check.C) {
  37         type1 := test.InstanceType(1)
  38         type2 := test.InstanceType(2)
  39         type3 := test.InstanceType(3)
  40         waitForIdle := func(pool *Pool, notify <-chan struct{}) {
  41                 timeout := time.NewTimer(time.Second)
  42                 for {
  43                         instances := pool.Instances()
  44                         sort.Slice(instances, func(i, j int) bool {
  45                                 return strings.Compare(instances[i].ArvadosInstanceType, instances[j].ArvadosInstanceType) < 0
  46                         })
  47                         if len(instances) == 3 &&
  48                                 instances[0].ArvadosInstanceType == type1.Name &&
  49                                 instances[0].WorkerState == StateIdle.String() &&
  50                                 instances[1].ArvadosInstanceType == type1.Name &&
  51                                 instances[1].WorkerState == StateIdle.String() &&
  52                                 instances[2].ArvadosInstanceType == type2.Name &&
  53                                 instances[2].WorkerState == StateIdle.String() {
  54                                 return
  55                         }
  56                         select {
  57                         case <-timeout.C:
  58                                 c.Logf("pool.Instances() == %#v", instances)
  59                                 c.Error("timed out")
  60                                 return
  61                         case <-notify:
  62                         }
  63                 }
  64         }
  65
  66         logger := ctxlog.TestLogger(c)
  67         driver := &test.StubDriver{}
  68         is, err := driver.InstanceSet(nil, "", logger)
  69         c.Assert(err, check.IsNil)
  70
  71         newExecutor := func(cloud.Instance) Executor {
  72                 return stubExecutor{
  73                         "crunch-run --list": stubResp{},
  74                         "true":              stubResp{},
  75                 }
  76         }
  77
  78         cluster := &arvados.Cluster{
  79                 Dispatch: arvados.Dispatch{
  80                         MaxProbesPerSecond: 1000,
  81                         ProbeInterval:      arvados.Duration(time.Millisecond * 10),
  82                 },
  83                 CloudVMs: arvados.CloudVMs{
  84                         BootProbeCommand: "true",
  85                         SyncInterval:     arvados.Duration(time.Millisecond * 10),
  86                 },
  87                 InstanceTypes: arvados.InstanceTypeMap{
  88                         type1.Name: type1,
  89                         type2.Name: type2,
  90                         type3.Name: type3,
  91                 },
  92         }
  93
  94         pool := NewPool(logger, arvados.NewClientFromEnv(), prometheus.NewRegistry(), is, newExecutor, nil, cluster)
  95         notify := pool.Subscribe()
  96         defer pool.Unsubscribe(notify)
  97         pool.Create(type1)
  98         pool.Create(type1)
  99         pool.Create(type2)
 100         waitForIdle(pool, notify)
 101         var heldInstanceID cloud.InstanceID
 102         for _, inst := range pool.Instances() {
 103                 if inst.ArvadosInstanceType == type2.Name {
 104                         heldInstanceID = cloud.InstanceID(inst.Instance)
 105                         pool.SetIdleBehavior(heldInstanceID, IdleBehaviorHold)
 106                 }
 107         }
 108         pool.Stop()
 109
 110         c.Log("------- starting new pool, waiting to recover state")
 111
 112         pool2 := NewPool(logger, arvados.NewClientFromEnv(), prometheus.NewRegistry(), is, newExecutor, nil, cluster)
 113         notify2 := pool2.Subscribe()
 114         defer pool2.Unsubscribe(notify2)
 115         waitForIdle(pool2, notify2)
 116         for _, inst := range pool2.Instances() {
 117                 if inst.ArvadosInstanceType == type2.Name {
 118                         c.Check(inst.Instance, check.Equals, heldInstanceID)
 119                         c.Check(inst.IdleBehavior, check.Equals, IdleBehaviorHold)
 120                 } else {
 121                         c.Check(inst.IdleBehavior, check.Equals, IdleBehaviorRun)
 122                 }
 123         }
 124         pool2.Stop()
 125 }
 126
 127 func (suite *PoolSuite) TestCreateUnallocShutdown(c *check.C) {
 128         logger := ctxlog.TestLogger(c)
 129         driver := test.StubDriver{HoldCloudOps: true}
 130         instanceSet, err := driver.InstanceSet(nil, "", logger)
 131         c.Assert(err, check.IsNil)
 132
 133         type1 := arvados.InstanceType{Name: "a1s", ProviderType: "a1.small", VCPUs: 1, RAM: 1 * GiB, Price: .01}
 134         type2 := arvados.InstanceType{Name: "a2m", ProviderType: "a2.medium", VCPUs: 2, RAM: 2 * GiB, Price: .02}
 135         type3 := arvados.InstanceType{Name: "a2l", ProviderType: "a2.large", VCPUs: 4, RAM: 4 * GiB, Price: .04}
 136         pool := &Pool{
 137                 logger:      logger,
 138                 newExecutor: func(cloud.Instance) Executor { return stubExecutor{} },
 139                 instanceSet: &throttledInstanceSet{InstanceSet: instanceSet},
 140                 instanceTypes: arvados.InstanceTypeMap{
 141                         type1.Name: type1,
 142                         type2.Name: type2,
 143                         type3.Name: type3,
 144                 },
 145         }
 146         notify := pool.Subscribe()
 147         defer pool.Unsubscribe(notify)
 148         notify2 := pool.Subscribe()
 149         defer pool.Unsubscribe(notify2)
 150
 151         c.Check(pool.Unallocated()[type1], check.Equals, 0)
 152         c.Check(pool.Unallocated()[type2], check.Equals, 0)
 153         c.Check(pool.Unallocated()[type3], check.Equals, 0)
 154         pool.Create(type2)
 155         pool.Create(type1)
 156         pool.Create(type2)
 157         pool.Create(type3)
 158         c.Check(pool.Unallocated()[type1], check.Equals, 1)
 159         c.Check(pool.Unallocated()[type2], check.Equals, 2)
 160         c.Check(pool.Unallocated()[type3], check.Equals, 1)
 161
 162         // Unblock the pending Create calls.
 163         go driver.ReleaseCloudOps(4)
 164
 165         // Wait for each instance to either return from its Create
 166         // call, or show up in a poll.
 167         suite.wait(c, pool, notify, func() bool {
 168                 pool.mtx.RLock()
 169                 defer pool.mtx.RUnlock()
 170                 return len(pool.workers) == 4
 171         })
 172
 173         // Place type3 node on admin-hold
 174         ivs := suite.instancesByType(pool, type3)
 175         c.Assert(ivs, check.HasLen, 1)
 176         type3instanceID := ivs[0].Instance
 177         err = pool.SetIdleBehavior(type3instanceID, IdleBehaviorHold)
 178         c.Check(err, check.IsNil)
 179
 180         // Check admin-hold behavior: refuse to shutdown, and don't
 181         // report as Unallocated ("available now or soon").
 182         c.Check(pool.Shutdown(type3), check.Equals, false)
 183         suite.wait(c, pool, notify, func() bool {
 184                 return pool.Unallocated()[type3] == 0
 185         })
 186         c.Check(suite.instancesByType(pool, type3), check.HasLen, 1)
 187
 188         // Shutdown both type2 nodes
 189         c.Check(pool.Shutdown(type2), check.Equals, true)
 190         suite.wait(c, pool, notify, func() bool {
 191                 return pool.Unallocated()[type1] == 1 && pool.Unallocated()[type2] == 1
 192         })
 193         c.Check(pool.Shutdown(type2), check.Equals, true)
 194         suite.wait(c, pool, notify, func() bool {
 195                 return pool.Unallocated()[type1] == 1 && pool.Unallocated()[type2] == 0
 196         })
 197         c.Check(pool.Shutdown(type2), check.Equals, false)
 198         for {
 199                 // Consume any waiting notifications to ensure the
 200                 // next one we get is from Shutdown.
 201                 select {
 202                 case <-notify:
 203                         continue
 204                 default:
 205                 }
 206                 break
 207         }
 208
 209         // Shutdown type1 node
 210         c.Check(pool.Shutdown(type1), check.Equals, true)
 211         suite.wait(c, pool, notify, func() bool {
 212                 return pool.Unallocated()[type1] == 0 && pool.Unallocated()[type2] == 0 && pool.Unallocated()[type3] == 0
 213         })
 214         select {
 215         case <-notify2:
 216         case <-time.After(time.Second):
 217                 c.Error("notify did not receive")
 218         }
 219
 220         // Put type3 node back in service.
 221         err = pool.SetIdleBehavior(type3instanceID, IdleBehaviorRun)
 222         c.Check(err, check.IsNil)
 223         suite.wait(c, pool, notify, func() bool {
 224                 return pool.Unallocated()[type3] == 1
 225         })
 226
 227         // Check admin-drain behavior: shut down right away, and don't
 228         // report as Unallocated.
 229         err = pool.SetIdleBehavior(type3instanceID, IdleBehaviorDrain)
 230         c.Check(err, check.IsNil)
 231         suite.wait(c, pool, notify, func() bool {
 232                 return pool.Unallocated()[type3] == 0
 233         })
 234         suite.wait(c, pool, notify, func() bool {
 235                 ivs := suite.instancesByType(pool, type3)
 236                 return len(ivs) == 1 && ivs[0].WorkerState == StateShutdown.String()
 237         })
 238
 239         // Unblock all pending Destroy calls. Pool calls Destroy again
 240         // if a node still appears in the provider list after a
 241         // previous attempt, so there might be more than 4 Destroy
 242         // calls to unblock.
 243         go driver.ReleaseCloudOps(4444)
 244
 245         // Sync until all instances disappear from the provider list.
 246         suite.wait(c, pool, notify, func() bool {
 247                 pool.getInstancesAndSync()
 248                 return len(pool.Instances()) == 0
 249         })
 250 }
 251
 252 func (suite *PoolSuite) instancesByType(pool *Pool, it arvados.InstanceType) []InstanceView {
 253         var ivs []InstanceView
 254         for _, iv := range pool.Instances() {
 255                 if iv.ArvadosInstanceType == it.Name {
 256                         ivs = append(ivs, iv)
 257                 }
 258         }
 259         return ivs
 260 }
 261
 262 func (suite *PoolSuite) wait(c *check.C, pool *Pool, notify <-chan struct{}, ready func() bool) {
 263         timeout := time.NewTimer(time.Second).C
 264         for !ready() {
 265                 select {
 266                 case <-notify:
 267                         continue
 268                 case <-timeout:
 269                 }
 270                 break
 271         }
 272         c.Check(ready(), check.Equals, true)
 273 }