func (db *SQLDB) ClaimActualLRP(logger lager.Logger, processGuid string, index int32, instanceKey *models.ActualLRPInstanceKey) (*models.ActualLRPGroup, *models.ActualLRPGroup, error) {
logger = logger.WithData(lager.Data{"process_guid": processGuid, "index": index, "instance_key": instanceKey})
logger.Info("starting")
defer logger.Info("complete")
var beforeActualLRP models.ActualLRP
var actualLRP *models.ActualLRP
err := db.transact(logger, func(logger lager.Logger, tx *sql.Tx) error {
var err error
actualLRP, err = db.fetchActualLRPForUpdate(logger, processGuid, index, false, tx)
if err != nil {
logger.Error("failed-fetching-actual-lrp-for-share", err)
return err
}
beforeActualLRP = *actualLRP
if !actualLRP.AllowsTransitionTo(&actualLRP.ActualLRPKey, instanceKey, models.ActualLRPStateClaimed) {
logger.Error("cannot-transition-to-claimed", nil, lager.Data{"from_state": actualLRP.State, "same_instance_key": actualLRP.ActualLRPInstanceKey.Equal(instanceKey)})
return models.ErrActualLRPCannotBeClaimed
}
if actualLRP.State == models.ActualLRPStateClaimed && actualLRP.ActualLRPInstanceKey.Equal(instanceKey) {
return nil
}
actualLRP.ModificationTag.Increment()
actualLRP.State = models.ActualLRPStateClaimed
actualLRP.ActualLRPInstanceKey = *instanceKey
actualLRP.PlacementError = ""
actualLRP.ActualLRPNetInfo = models.ActualLRPNetInfo{}
actualLRP.Since = db.clock.Now().UnixNano()
_, err = db.update(logger, tx, actualLRPsTable,
SQLAttributes{
"state": actualLRP.State,
"cell_id": actualLRP.CellId,
"instance_guid": actualLRP.InstanceGuid,
"modification_tag_index": actualLRP.ModificationTag.Index,
"placement_error": actualLRP.PlacementError,
"since": actualLRP.Since,
"net_info": []byte{},
},
"process_guid = ? AND instance_index = ? AND evacuating = ?",
processGuid, index, false,
)
if err != nil {
logger.Error("failed-claiming-actual-lrp", err)
return db.convertSQLError(err)
}
return nil
})
return &models.ActualLRPGroup{Instance: &beforeActualLRP}, &models.ActualLRPGroup{Instance: actualLRP}, err
}
func itValidatesPresenceOfPlacementError(lrp *models.ActualLRP) {
Context("when placement error is set", func() {
BeforeEach(func() {
lrp.PlacementError = "insufficient capacity"
})
It("validate does not return an error", func() {
Expect(lrp.Validate()).NotTo(HaveOccurred())
})
})
Context("when placement error is not set", func() {
BeforeEach(func() {
lrp.PlacementError = ""
})
It("validate does not return an error", func() {
Expect(lrp.Validate()).NotTo(HaveOccurred())
})
})
}
func itValidatesAbsenceOfPlacementError(lrp *models.ActualLRP) {
Context("when placement error is set", func() {
BeforeEach(func() {
lrp.PlacementError = "insufficient capacity"
})
It("validate returns an error", func() {
err := lrp.Validate()
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(ContainSubstring("placement error"))
})
})
Context("when placement error is not set", func() {
BeforeEach(func() {
lrp.PlacementError = ""
})
It("validate does not return an error", func() {
Expect(lrp.Validate()).NotTo(HaveOccurred())
})
})
}
func (db *SQLDB) FailActualLRP(logger lager.Logger, key *models.ActualLRPKey, placementError string) (*models.ActualLRPGroup, *models.ActualLRPGroup, error) {
logger = logger.WithData(lager.Data{"actual_lrp_key": key, "placement_error": placementError})
logger.Info("starting")
defer logger.Info("complete")
var beforeActualLRP models.ActualLRP
var actualLRP *models.ActualLRP
err := db.transact(logger, func(logger lager.Logger, tx *sql.Tx) error {
var err error
actualLRP, err = db.fetchActualLRPForUpdate(logger, key.ProcessGuid, key.Index, false, tx)
if err != nil {
logger.Error("failed-to-get-actual-lrp", err)
return err
}
beforeActualLRP = *actualLRP
if actualLRP.State != models.ActualLRPStateUnclaimed {
logger.Error("cannot-fail-actual-lrp", nil, lager.Data{"from_state": actualLRP.State})
return models.ErrActualLRPCannotBeFailed
}
now := db.clock.Now().UnixNano()
actualLRP.ModificationTag.Increment()
actualLRP.PlacementError = placementError
actualLRP.Since = now
evacuating := false
_, err = db.update(logger, tx, actualLRPsTable,
SQLAttributes{
"modification_tag_index": actualLRP.ModificationTag.Index,
"placement_error": truncateString(actualLRP.PlacementError, 1024),
"since": actualLRP.Since,
},
"process_guid = ? AND instance_index = ? AND evacuating = ?",
key.ProcessGuid, key.Index, evacuating,
)
if err != nil {
logger.Error("failed-failing-actual-lrp", err)
return db.convertSQLError(err)
}
return nil
})
return &models.ActualLRPGroup{Instance: &beforeActualLRP}, &models.ActualLRPGroup{Instance: actualLRP}, err
}
func (db *SQLDB) StartActualLRP(logger lager.Logger, key *models.ActualLRPKey, instanceKey *models.ActualLRPInstanceKey, netInfo *models.ActualLRPNetInfo) (*models.ActualLRPGroup, *models.ActualLRPGroup, error) {
logger = logger.WithData(lager.Data{"actual_lrp_key": key, "actual_lrp_instance_key": instanceKey, "net_info": netInfo})
var beforeActualLRP models.ActualLRP
var actualLRP *models.ActualLRP
err := db.transact(logger, func(logger lager.Logger, tx *sql.Tx) error {
var err error
actualLRP, err = db.fetchActualLRPForUpdate(logger, key.ProcessGuid, key.Index, false, tx)
if err == models.ErrResourceNotFound {
actualLRP, err = db.createRunningActualLRP(logger, key, instanceKey, netInfo, tx)
return err
}
if err != nil {
logger.Error("failed-to-get-actual-lrp", err)
return err
}
beforeActualLRP = *actualLRP
if actualLRP.ActualLRPKey.Equal(key) &&
actualLRP.ActualLRPInstanceKey.Equal(instanceKey) &&
actualLRP.ActualLRPNetInfo.Equal(netInfo) &&
actualLRP.State == models.ActualLRPStateRunning {
logger.Debug("nothing-to-change")
return nil
}
if !actualLRP.AllowsTransitionTo(key, instanceKey, models.ActualLRPStateRunning) {
logger.Error("failed-to-transition-actual-lrp-to-started", nil)
return models.ErrActualLRPCannotBeStarted
}
logger.Info("starting")
defer logger.Info("completed")
now := db.clock.Now().UnixNano()
evacuating := false
actualLRP.ActualLRPInstanceKey = *instanceKey
actualLRP.ActualLRPNetInfo = *netInfo
actualLRP.State = models.ActualLRPStateRunning
actualLRP.Since = now
actualLRP.ModificationTag.Increment()
actualLRP.PlacementError = ""
netInfoData, err := db.serializeModel(logger, &actualLRP.ActualLRPNetInfo)
if err != nil {
logger.Error("failed-to-serialize-net-info", err)
return err
}
_, err = db.update(logger, tx, actualLRPsTable,
SQLAttributes{
"state": actualLRP.State,
"cell_id": actualLRP.CellId,
"instance_guid": actualLRP.InstanceGuid,
"modification_tag_index": actualLRP.ModificationTag.Index,
"placement_error": actualLRP.PlacementError,
"since": actualLRP.Since,
"net_info": netInfoData,
},
"process_guid = ? AND instance_index = ? AND evacuating = ?",
key.ProcessGuid, key.Index, evacuating,
)
if err != nil {
logger.Error("failed-starting-actual-lrp", err)
return db.convertSQLError(err)
}
return nil
})
return &models.ActualLRPGroup{Instance: &beforeActualLRP}, &models.ActualLRPGroup{Instance: actualLRP}, err
}
Expect(claimErr).To(Equal(models.ErrActualLRPCannotBeClaimed))
})
It("does not alter the existing actual", func() {
lrpGroupInBBS, err := etcdDB.ActualLRPGroupByProcessGuidAndIndex(logger, processGuid, index)
Expect(err).NotTo(HaveOccurred())
Expect(lrpGroupInBBS.Instance.InstanceGuid).To(Equal(instanceGuid))
})
})
})
Context("when there is a placement error", func() {
BeforeEach(func() {
instanceKey = models.NewActualLRPInstanceKey("some-instance-guid", cellID)
actualLRP.PlacementError = "insufficient resources"
etcdHelper.SetRawActualLRP(actualLRP)
})
It("should clear placement error", func() {
Expect(claimErr).NotTo(HaveOccurred())
lrp, err := etcdDB.ActualLRPGroupByProcessGuidAndIndex(logger, processGuid, index)
Expect(err).NotTo(HaveOccurred())
Expect(lrp.Instance.PlacementError).To(BeEmpty())
})
It("returns the existing actual lrp group", func() {
Expect(beforeActualGroup).To(Equal(&models.ActualLRPGroup{Instance: actualLRP}))
})
})
})
})
It("does not emit any events", func() {
Consistently(actualHub.EmitCallCount).Should(Equal(0))
})
})
})
Context("when the instance is unclaimed", func() {
BeforeEach(func() {
actual.State = models.ActualLRPStateUnclaimed
})
Context("without a placement error", func() {
BeforeEach(func() {
actual.PlacementError = ""
group := &models.ActualLRPGroup{Evacuating: afterActual}
fakeEvacuationDB.EvacuateActualLRPReturns(group, nil)
})
It("evacuates the LRP", func() {
response := models.EvacuationResponse{}
err := response.Unmarshal(responseRecorder.Body.Bytes())
Expect(err).NotTo(HaveOccurred())
Expect(response.KeepContainer).To(BeTrue())
Expect(response.Error).To(BeNil())
Expect(fakeEvacuationDB.EvacuateActualLRPCallCount()).To(Equal(1))
_, actualLRPKey, actualLRPInstanceKey, actualLrpNetInfo, ttl := fakeEvacuationDB.EvacuateActualLRPArgsForCall(0)
Expect(*actualLRPKey).To(Equal(actual.ActualLRPKey))
Expect(*actualLRPInstanceKey).To(Equal(actual.ActualLRPInstanceKey))