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etcd-backup addon fails to generate backups if ETCDCTL_CACERT, ETCDCTL_CERT and ETCDCTL_KEY is set in the cronjob
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Problem
- etcd-backup addon fails to generate backups if ETCDCTLCACERT, ETCDCTL CERT and ETCDCTL_KEY is set in the cronjob.
- Below environment variables are set in etcd-backup cronjob:
Javascript
xxxxxxxxxx# kubectl -n kube-system get cronjob etcd-backup-with-interval -o yaml |grep -A7 ETCDCTL_CACERT - name: ETCDCTL_CACERT value: /certs/apiserver/etcd/ca.crt - name: ETCDCTL_CERT value: /certs/apiserver/etcd/request.crt - name: ETCDCTL_KEY value: /certs/apiserver/etcd/request.key- etcd-backup pods remain in NotReady state:
Javascript
# kubectl get pod -o wide | grep etcdetcd-backup-with-interval-27801890-zjghf 1/2 NotReady 0 7m41s 10.164.209.47 10.164.209.47 <none> <none>- db.part files are created in the backup path:
Javascript
# kubectl logs etcd-backup-with-interval-27801890-zjghf etcd-backup{"level":"info","ts":1668113401.1358364,"caller":"snapshot/v3_snapshot.go:119","msg":"created temporary db file","path":"/backup/etcd-snapshot-2022-11-10_20:50:01_UTC.db.part"}%Environment
- Platform9 Managed Kubernetes - v5.6.1(kubernetes version 1.23)
Resolution
- Edit the cronjob and remove below 6 environment variables:
Javascript
xxxxxxxxxx# kubectl -n kube-system edit cronjob etcd-backup-with-interval >> Remove below 6 lines and save the config: - name: ETCDCTL_CACERT value: /certs/apiserver/etcd/ca.crt - name: ETCDCTL_CERT value: /certs/apiserver/etcd/request.crt - name: ETCDCTL_KEY value: /certs/apiserver/etcd/request.key- Then check if the backups work.
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