From c30560241c9de738a3d0dd83e153c8ec167e63d9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Micha=C5=82=20Socho=C5=84?= Date: Mon, 21 Feb 2022 22:10:47 +0100 Subject: [PATCH] Update etcdInsufficientMembers.md Fixes #30 --- content/runbooks/etcd/etcdInsufficientMembers.md | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/content/runbooks/etcd/etcdInsufficientMembers.md b/content/runbooks/etcd/etcdInsufficientMembers.md index bb4f91d..97fa7a2 100644 --- a/content/runbooks/etcd/etcdInsufficientMembers.md +++ b/content/runbooks/etcd/etcdInsufficientMembers.md @@ -4,6 +4,7 @@ This alert fires when there are fewer instances available than are needed by etcd to be healthy. +This means that etcd cluster has not enough members in the cluster to create quorum. ## Impact @@ -11,6 +12,9 @@ When etcd does not have a majority of instances available the Kubernetes and OpenShift APIs will reject read and write requests and operations that preserve the health of workloads cannot be performed. +In general loosing quorum will switch etcd to read only, which effectively renders k8s api read only. +It is possible to read the current state, but not possible to update it. + ## Diagnosis This can kubectlcur multiple control plane nodes are powered off or are unable to