Equipment/Blanton/Kubernetes: Difference between revisions

Equipment/Blanton/Kubernetes (view source)

870 bytes added , 2 April 2022

134

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 # Run <code>kubeadm reset</code> on the affected node
 # Run <code>kubeadm join</code> as if it was a new node
+== ETCD Maintainance ==
+It seems the ETCD database can grow very, very large, which can cause startup to take many minutes, making many things unhappy.
+Running this on the master can help:
+  ETCDCTL_API=3 etcdctl --cacert=/etc/kubernetes/pki/etcd/ca.crt  --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key  get revisiontestkey -w json
+ {"header":{"cluster_id":12152285089840826538,"member_id":17687274478532125122,"revision":45368346,"raft_term":10}}
+take the revision from above, subtract one, then run:
+  ETCDCTL_API=3 etcdctl --cacert=/etc/kubernetes/pki/etcd/ca.crt  --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key  compact 45368345
+  ETCDCTL_API=3 etcdctl --cacert=/etc/kubernetes/pki/etcd/ca.crt  --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key defrag