Do not remove evacuating actual LRP during cleanup (#53)

Evacuating actual LRP will be removed by BBS convergence or after the
replacement LRP is started. No need to bombard BBS during cell updates.
This will minimize the drain time and it will actually stay close to the
configured drain timeout. Cleanup is happening after the timeout is
reached and BBS requests can overload BBS and cause it to timeout each
request (10s) by default.

evacuation/cleanup.go

@@ -78,10 +78,6 @@ func (e *EvacuationCleanup) Run(signals <-chan os.Signal, ready chan<- struct{})
 		}
 
 		strandedEvacuationCount++
-		err = e.bbsClient.RemoveEvacuatingActualLRP(logger, traceID, &actualLRP.ActualLRPKey, &actualLRP.ActualLRPInstanceKey)
-		if err != nil {
-			logger.Error("failed-removing-evacuating-actual-lrp", err, lager.Data{"lrp-key": actualLRP.ActualLRPKey})
-		}
 	}
 
 	err = e.metronClient.SendMetric(strandedEvacuatingActualLRPsMetric, strandedEvacuationCount)

evacuation/cleanup_test.go

@@ -134,26 +134,6 @@ var _ = Describe("EvacuationCleanup", func() {
 			cleanupProcess.Signal(os.Kill)
 		})
 
-		It("removes all evacuating actual lrps associated with the cell", func() {
-			Eventually(errCh).Should(Receive(nil))
-			Expect(fakeBBSClient.ActualLRPsCallCount()).To(Equal(1))
-			_, traceID, filter := fakeBBSClient.ActualLRPsArgsForCall(0)
-			Expect(traceID).To(BeEmpty())
-			Expect(filter).To(Equal(models.ActualLRPFilter{CellID: cellID}))
-
-			Expect(fakeBBSClient.RemoveEvacuatingActualLRPCallCount()).To(Equal(2))
-
-			_, traceID, lrpKey, lrpInstanceKey := fakeBBSClient.RemoveEvacuatingActualLRPArgsForCall(0)
-			Expect(traceID).To(BeEmpty())
-			Expect(*lrpKey).To(Equal(evacuatingActualLRP.ActualLRPKey))
-			Expect(*lrpInstanceKey).To(Equal(evacuatingActualLRP.ActualLRPInstanceKey))
-
-			_, traceID, lrpKey, lrpInstanceKey = fakeBBSClient.RemoveEvacuatingActualLRPArgsForCall(1)
-			Expect(traceID).To(BeEmpty())
-			Expect(*lrpKey).To(Equal(evacuatingActualLRPWithReplacement.ActualLRPKey))
-			Expect(*lrpInstanceKey).To(Equal(evacuatingActualLRPWithReplacement.ActualLRPInstanceKey))
-		})
-
 		It("logs the number of stranded evacuating actual lrps", func() {
 			Eventually(logger).Should(gbytes.Say("finished-evacuating.*\"stranded-evacuating-actual-lrps\":2"))
 		})
@@ -318,16 +298,5 @@ var _ = Describe("EvacuationCleanup", func() {
 				Expect(err).To(Equal(errors.New("failed")))
 			})
 		})
-
-		Describe("when removing the evacuating actual lrp fails", func() {
-			BeforeEach(func() {
-				fakeBBSClient.RemoveEvacuatingActualLRPReturns(errors.New("failed"))
-			})
-
-			It("continues removing evacuating actual lrps", func() {
-				Eventually(errCh).Should(Receive(nil))
-				Expect(fakeBBSClient.RemoveEvacuatingActualLRPCallCount()).To(Equal(2))
-			})
-		})
 	})
 })