9
Etcdのクラスターバックアップ/リストア
OpenShiftのクラスターバックアップ/リストア
● OpenShiftが提供しているスクリプトを実行
○ CoreOSにスクリプトが仕込んである。
○ master nodeに入って実行するだけ。
● クラスター全体のバックアップ/リストア
○ リストア時はクラスター全体のリソースが復元される。
○ 1台でもmasterが生きていればリストアできる。
● 注意点
○ ストレージ(PV)のデータはバックアップされないた
め、リストアできない。
○ 特定のNamespaceだけ、など部分的なリストアはで
きない。
○ 別のクラスタにリストアはできない。
[[email protected] ~]# oc debug node/master0
Starting pod/master0-debug ...
To use host binaries, run `chroot /host`
Pod IP: 172.16.0.10
If you don't see a command prompt, try pressing enter.
sh-4.4# chroot /host
sh-4.4# /usr/local/bin/cluster-backup.sh /home/core/backup/
found latest kube-apiserver: /etc/kubernetes/static-pod-resources/kube-apiserver-pod-20
found latest kube-controller-manager:
/etc/kubernetes/static-pod-resources/kube-controller-manager-pod-8
found latest kube-scheduler: /etc/kubernetes/static-pod-resources/kube-scheduler-pod-9
found latest etcd: /etc/kubernetes/static-pod-resources/etcd-pod-4
etcdctl is already installed
{"level":"info","ts":1642661012.619663,"caller":"snapshot/v3_snapshot.go:68","msg":"created
temporary db file","path":"/home/core/backup//snapshot_2022-01-20_064332.db.part"}
{"level":"info","ts":1642661012.6269116,"logger":"client","caller":"v3/maintenance.go:211",
"msg":"opened snapshot stream; downloading"}
{"level":"info","ts":1642661012.6271513,"caller":"snapshot/v3_snapshot.go:76","msg":"fetchi
ng snapshot","endpoint":"https://172.16.0.10:2379"}
{"level":"info","ts":1642661013.1581688,"logger":"client","caller":"v3/maintenance.go:219",
"msg":"completed snapshot read; closing"}
{"level":"info","ts":1642661013.4697661,"caller":"snapshot/v3_snapshot.go:91","msg":"fetche
d snapshot","endpoint":"https://172.16.0.10:2379","size":"81 MB","took":"now"}
{"level":"info","ts":1642661013.4698682,"caller":"snapshot/v3_snapshot.go:100","msg":"saved
","path":"/home/core/backup//snapshot_2022-01-20_064332.db"}
Snapshot saved at /home/core/backup//snapshot_2022-01-20_064332.db
Deprecated: Use `etcdutl snapshot status` instead.
{"hash":678588886,"revision":36324472,"totalKey":11757,"totalSize":81399808}
snapshot db and kube resources are successfully saved to /home/core/backup/
sh-4.4# ls -l /home/core/backup/
total 79576
-rw-------. 1 root root 81399840 Jan 20 06:43 snapshot_2022-01-20_064332.db
-rw-------. 1 root root 78742 Jan 20 06:43static_kuberesources_2022-01-20_064332.tar.gz
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