Describe("The steady state", func() {
Context("When there are no desired or running apps", func() {
It("should not send any start or stop messages", func() {
err := analyzer.Analyze()
Ω(err).ShouldNot(HaveOccurred())
Ω(startMessages()).Should(BeEmpty())
Ω(stopMessages()).Should(BeEmpty())
})
})
Context("When the desired number of instances and the running number of instances match", func() {
BeforeEach(func() {
desired := app.DesiredState(3)
desired.State = models.AppStateStarted
store.SyncDesiredState(
desired,
)
store.SyncHeartbeats(app.Heartbeat(3))
})
It("should not send any start or stop messages", func() {
err := analyzer.Analyze()
Ω(err).ShouldNot(HaveOccurred())
Ω(startMessages()).Should(BeEmpty())
Ω(stopMessages()).Should(BeEmpty())
})
})
})
Describe("Starting missing instances", func() {
Context("where an app has desired instances", func() {
}
crashCount := models.CrashCount{
AppGuid: app.AppGuid,
AppVersion: app.AppVersion,
InstanceIndex: 1,
CrashCount: 2,
}
expectedApp = models.NewApp(
app.AppGuid,
app.AppVersion,
app.DesiredState(3),
instanceHeartbeats,
map[int]models.CrashCount{1: crashCount},
)
store.SyncDesiredState(app.DesiredState(3))
store.SyncHeartbeats(app.Heartbeat(3))
store.SaveCrashCounts(crashCount)
validRequestPayload = fmt.Sprintf(`{"droplet":"%s","version":"%s"}`, app.AppGuid, app.AppVersion)
})
Context("when the store is fresh", func() {
BeforeEach(func() {
store.BumpDesiredFreshness(time.Unix(0, 0))
store.BumpActualFreshness(time.Unix(0, 0))
})
Context("when the app query parameters do not correspond to an existing app", func() {
It("should respond with an empty hash", func() {
response := makeRequest(`{"droplet":"elephant","version":"pink-flamingo"}`)
Ω(response).Should(Equal("{}"))
Context("when a response with desired state is received", func() {
var (
a1 appfixture.AppFixture
a2 appfixture.AppFixture
stoppedApp appfixture.AppFixture
pendingStagingApp appfixture.AppFixture
failedToStageApp appfixture.AppFixture
deletedApp appfixture.AppFixture
pendingStagingDesiredState models.DesiredAppState
)
BeforeEach(func() {
deletedApp = appfixture.NewAppFixture()
store.SyncDesiredState(deletedApp.DesiredState(1))
a1 = appfixture.NewAppFixture()
a2 = appfixture.NewAppFixture()
stoppedApp = appfixture.NewAppFixture()
stoppedDesiredState := stoppedApp.DesiredState(1)
stoppedDesiredState.State = models.AppStateStopped
pendingStagingApp = appfixture.NewAppFixture()
pendingStagingDesiredState = pendingStagingApp.DesiredState(1)
pendingStagingDesiredState.PackageState = models.AppPackageStatePending
failedToStageApp = appfixture.NewAppFixture()
failedStagingDesiredState := failedToStageApp.DesiredState(1)
failedStagingDesiredState.PackageState = models.AppPackageStateFailed
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfUndesiredRunningApps", Value: -1}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfRunningInstances", Value: -1}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfMissingIndices", Value: -1}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfCrashedInstances", Value: -1}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfCrashedIndices", Value: -1}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfDesiredApps", Value: -1}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfDesiredInstances", Value: -1}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfDesiredAppsPendingStaging", Value: -1}))
})
})
Context("When a desired app is pending staging", func() {
BeforeEach(func() {
desired := a.DesiredState(3)
desired.PackageState = models.AppPackageStatePending
store.SyncDesiredState(desired)
store.SyncHeartbeats(a.Heartbeat(1))
})
It("should have the correct stats", func() {
context := metricsServer.Emit()
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfAppsWithAllInstancesReporting", Value: 0}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfAppsWithMissingInstances", Value: 0}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfUndesiredRunningApps", Value: 0}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfRunningInstances", Value: 1}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfMissingIndices", Value: 0}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfCrashedInstances", Value: 0}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfCrashedIndices", Value: 0}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfDesiredApps", Value: 0}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfDesiredInstances", Value: 0}))
Ω(context.Metrics).Should(ContainElement(instrumentation.Metric{Name: "NumberOfDesiredAppsPendingStaging", Value: 1}))
It("should not send any messages", func() {
err := sender.Send()
Ω(err).ShouldNot(HaveOccurred())
Ω(messageBus.PublishedMessages).Should(BeEmpty())
})
})
Context("when there are start messages", func() {
var keepAliveTime int
var sentOn int64
var err error
var pendingMessage models.PendingStartMessage
var storeSetErrInjector *fakestoreadapter.FakeStoreAdapterErrorInjector
JustBeforeEach(func() {
store.SyncDesiredState(app.DesiredState(1))
pendingMessage = models.NewPendingStartMessage(time.Unix(100, 0), 30, keepAliveTime, app.AppGuid, app.AppVersion, 0, 1.0, models.PendingStartMessageReasonInvalid)
pendingMessage.SentOn = sentOn
store.SavePendingStartMessages(
pendingMessage,
)
storeAdapter.SetErrInjector = storeSetErrInjector
err = sender.Send()
})
BeforeEach(func() {
keepAliveTime = 0
sentOn = 0
err = nil
storeSetErrInjector = nil
})