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Kubernetes Prow Robot 45e5f6053b Merge pull request #74424 from liggitt/drop-k8s-io-node-labels Clean up self-set node labels		2019-03-06 08:24:26 -08:00
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addon-manager	Merge pull request #73540 from rlenferink/patch-5	2019-02-08 09:05:56 -08:00
calico-policy-controller	Updated OWNERS files to include link to docs	2019-02-04 22:33:12 +01:00
cluster-loadbalancing	Update docs for Ingress-GCE related cluster addon	2019-02-18 13:17:01 -08:00
cluster-monitoring	delete all duplicate empty blanks	2019-02-23 10:28:04 +08:00
dashboard	Updated OWNERS files to include link to docs	2019-02-04 22:33:12 +01:00
device-plugins/nvidia-gpu	Update nvidia-gpu-device-plugin addon.	2019-02-11 15:52:33 -08:00
dns	delete all duplicate empty blanks	2019-02-23 10:28:04 +08:00
dns-horizontal-autoscaler	Updated OWNERS files to include link to docs	2019-02-04 22:33:12 +01:00
fluentd-elasticsearch	Merge pull request #74424 from liggitt/drop-k8s-io-node-labels	2019-03-06 08:24:26 -08:00
fluentd-gcp	Merge pull request #74424 from liggitt/drop-k8s-io-node-labels	2019-03-06 08:24:26 -08:00
ip-masq-agent	Prepare switch from beta.kubernetes.io/masq-agent-ds-ready to node.kubernetes.io/masq-agent-ds-ready	2019-02-26 11:43:10 -05:00
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metrics-server	Updated OWNERS files to include link to docs	2019-02-04 22:33:12 +01:00
node-problem-detector	Change add-on manifests to apps/v1	2018-12-19 17:30:59 -05:00
prometheus	delete all duplicate empty blanks	2019-02-23 10:28:04 +08:00
rbac	Grant permissions for batch/job to cluster-autoscaler	2018-10-16 10:46:46 +02:00
runtimeclass	Update deprecated links	2019-02-15 09:13:07 -05:00
storage-class	change default storage class annotation for all addons	2018-09-06 11:27:25 +02:00
storage-crds	Updated OWNERS files to include link to docs	2019-02-04 22:33:12 +01:00
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README.md	…

README.md

Legacy Cluster add-ons

For more information on add-ons see the documentation.

Overview

Cluster add-ons are resources like Services and Deployments (with pods) that are shipped with the Kubernetes binaries and are considered an inherent part of the Kubernetes clusters.

There are currently two classes of add-ons:

Add-ons that will be reconciled.
Add-ons that will be created if they don't exist.

More details could be found in addon-manager/README.md.

Cooperating Horizontal / Vertical Auto-Scaling with "reconcile class addons"

"Reconcile" class addons will be periodically reconciled to the original state given by the initial config. In order to make Horizontal / Vertical Auto-scaling functional, the related fields in config should be left unset. More specifically, leave replicas in ReplicationController / Deployment / ReplicaSet unset for Horizontal Scaling, leave resources for container unset for Vertical Scaling. The periodic reconcile won't clobbered these fields, hence they could be managed by Horizontal / Vertical Auto-scaler.

Add-on naming

The suggested naming for most of the resources is <basename> (with no version number). Though resources like Pod, ReplicationController and DaemonSet are exceptional. It would be hard to update Pod because many fields in Pod are immutable. For ReplicationController and DaemonSet, in-place update may not trigger the underlying pods to be re-created. You probably need to change their names during update to trigger a complete deletion and creation.