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addon-manager Update all script to use /usr/bin/env bash in shebang Apr 19, 2018
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device-plugins/nvidia-gpu Remove hostNetwork and hostPID from nvidia-gpu-device-plugin manifest. Apr 11, 2018
dns-horizontal-autoscaler autoscaler support for CoreDNS Apr 11, 2018
dns Merge pull request #62409 from rajansandeep/corednsscaler Apr 23, 2018
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istio Move istio-injection label to default namespace Mar 30, 2018
kube-proxy Add wildcard tolerations to kube-proxy. Nov 29, 2017
metadata-agent Merge pull request #63000 from kawych/versions Apr 24, 2018
metadata-proxy Added network-unavailable tolerations for hostNetwork=true. Mar 19, 2018
metrics-server Add Troubleshooting sections to Heapster and Metrics Server addons do… Mar 13, 2018
node-problem-detector `exec` away the shell for node-problem-detector Mar 10, 2018
prometheus [prometheus addon] Fix missing storage class in alertmanager PVC Apr 30, 2018
python-image remove gcloud docker -- since it's deprecated Feb 28, 2018
rbac gce: split legacy kubelet node role binding and bootstrapper role bin… Dec 14, 2017
storage-class [addon/storage-class] update storageclass groupversion in storage-class Oct 22, 2017
BUILD Use the pkg_tar wrapper from kubernetes/repo-infra Jan 19, 2018
README.md Updated cluster/addons readme to match and point to docs Oct 18, 2017

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.

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