magnum/releasenotes/notes/fix-race-condition-for-k8s-multi-masters-29bd36de57df355a.yaml
Feilong Wang 3c72d7b88b Fix race condition issue for k8s multi masters
When creating a multi-master cluster, all master nodes will attempt to
create kubernetes resources in the cluster at this same time, like
coredns, the dashboard, calico etc. This race conditon shouldn't be
a problem when doing declarative calls instead of imperative (kubectl
apply instead of create). However, due to [1], kubectl fails to apply
the changes and the deployemnt scripts fail causing cluster to creation
to fail in the case of Heat SoftwareDeployments. This patch passes the
ResourceGroup index of every master so that resource creation will be
attempted only from the first master node.

[1] https://github.com/kubernetes/kubernetes/issues/44165

Task: 21673
Story: 1775759

Change-Id: I83f78022481aeef945334c37ac6c812bba9791fd
2018-06-14 09:16:32 +12:00

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YAML

---
fixes:
- |
When creating a multi-master cluster, all master nodes will attempt to
create kubernetes resources in the cluster at this same time, like
coredns, the dashboard, calico etc. This race conditon shouldn't be
a problem when doing declarative calls instead of imperative (kubectl
apply instead of create). However, due to [1], kubectl fails to apply
the changes and the deployemnt scripts fail causing cluster to creation
to fail in the case of Heat SoftwareDeployments. This patch passes the
ResourceGroup index of every master so that resource creation will be
attempted only from the first master node.
[1] https://github.com/kubernetes/kubernetes/issues/44165