Enabled jobs instead of cronjobs to take care of running compaction. #235

abdasgupta · 2021-09-25T10:38:12Z

How to categorize this PR?

/area performance
/kind enhancement

What this PR does / why we need it:
Earlier cronjobs are scheduled through druid for backup compaction of ETCD. But that incurs huge cost as we have to predefine schedule and resources for compaction jobs. This PR enabled to run jobs instead of cronjobs to run the backup compaction. Jobs are triggered based on the number of events that accumulated as delta snapshot after last full snapshot.

cc @aaronfern
Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Release note:

CronJob is no more used to schedule compaction job at regular interval. Instead, we are using Job.
Therefore, `BackupCompactionSchedule` field is removed from ETCD backup spec, as it was only necessary for scheduling CronJob.

A new controller named lease controller has been introduced. Lease controller will be responsible for creating compaction job based on the delta event lease.
For this, two new `Lease`s are introduced: One to hold the value of the latest full snapshot revision and one for the last delta revision.

gardener-robot · 2021-09-25T10:38:15Z

@abdasgupta Labels area/todo, kind/todo do not exist.

timuthy

Thanks for the PR. I have a few suggestions and questions which I added as a comment to the affected line(s).

controllers/etcd_custodian_controller.go

charts/etcd/templates/etcd-compaction-job.yaml

controllers/etcd_custodian_controller.go

aaronfern

Thanks @abdasgupta for the well written PR!
Just one query from me and some nitpicks
Thanks!

controllers/lease_controller.go

controllers/etcd_controller.go

controllers/controller_ref_manager.go

aaronfern

Hey @abdasgupta
Just adding below some changes to the job that needs to be made before this PR is merged
This is to ensure it correctly works with the etcdbr version

controllers/lease_controller.go

controllers/controller_ref_manager.go

timuthy

Just some last comments. Thanks for your effort 👍

main.go

pkg/predicate/predicate_test.go

timuthy

/lgtm
I tested and played around with it w/o facing any issues 👍

stoyanr

/lgtm

There are a few comments that still use the old name LeaseController that you may want to fix.

stoyanr · 2021-11-12T13:50:08Z

controllers/compaction_lease_controller.go

+	config      controllersconfig.CompactionLeaseConfig
+}
+
+// NewCompactionLeaseController creates a new LeaseController object


Suggested change

// NewCompactionLeaseController creates a new LeaseController object

// NewCompactionLeaseController creates a new CompactionLeaseController object

stoyanr · 2021-11-12T13:50:32Z

controllers/compaction_lease_controller.go

+	}
+}
+
+// NewCompactionLeaseControllerWithImageVector creates a new LeaseController object


Suggested change

// NewCompactionLeaseControllerWithImageVector creates a new LeaseController object

// NewCompactionLeaseControllerWithImageVector creates a new CompactionLeaseController object

stoyanr · 2021-11-12T13:50:54Z

controllers/compaction_lease_controller.go

+	return lc.InitializeControllerWithImageVector()
+}
+
+// InitializeControllerWithImageVector will use LeaseController client to initialize image vector for etcd


Suggested change

// InitializeControllerWithImageVector will use LeaseController client to initialize image vector for etcd

// InitializeControllerWithImageVector will use CompactionLeaseController client to initialize image vector for etcd

aaronfern

/lgtm

Added test case for lease controller in separate test file.

timuthy

/lgtm

Comments have been addressed. Reviewer is absent.

abdasgupta requested a review from a team as a code owner September 25, 2021 10:38

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Simplify reconciliation #208

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abdasgupta force-pushed the job branch from 6565109 to 5314db6 Compare October 6, 2021 10:00

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abdasgupta changed the title ~~[WIP] Enabled jobs instead of cronjobs to take care of running compaction.~~ Enabled jobs instead of cronjobs to take care of running compaction. Oct 6, 2021

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Added role, rolebinding, serviceaccount, and environment variables. #233

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Several improvements for compaction feature #258

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Enabled jobs instead of cronjobs to take care of running compaction.

f5a2929

Added test case for lease controller in separate test file.

abdasgupta force-pushed the job branch from efa8681 to f5a2929 Compare November 15, 2021 09:21

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[Feature] Divide the Druid controllers into Reconciler and Actuator #259

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Enabled jobs instead of cronjobs to take care of running compaction. #235

Enabled jobs instead of cronjobs to take care of running compaction. #235

abdasgupta commented Sep 25, 2021 •

edited by timuthy

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	// NewCompactionLeaseController creates a new LeaseController object
	// NewCompactionLeaseController creates a new CompactionLeaseController object

	// NewCompactionLeaseControllerWithImageVector creates a new LeaseController object
	// NewCompactionLeaseControllerWithImageVector creates a new CompactionLeaseController object

	// InitializeControllerWithImageVector will use LeaseController client to initialize image vector for etcd
	// InitializeControllerWithImageVector will use CompactionLeaseController client to initialize image vector for etcd

Enabled jobs instead of cronjobs to take care of running compaction. #235

Enabled jobs instead of cronjobs to take care of running compaction. #235

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abdasgupta commented Sep 25, 2021 •

edited by timuthy

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