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Backup etcd

etcdctl インストール

sudo apt install etcd-client

ercd 疎通確認

  • https://github.com/etcd-io/etcd/tree/main/etcdctl#endpoint-health 
    ETCD_ENDPOINT=https://192.168.10.50:2379
ETCD_CACERT=/etc/etcd/ca.pem
ETCD_CERT=/etc/etcd/kubernetes.pem
ETCD_KEY=/etc/etcd/kubernetes-key.pem

ETCDCTL_API=3 etcdctl endpoint health \
  --endpoints=${ETCD_ENDPOINT} \
  --cacert=${ETCD_CACERT} \
  --cert=${ETCD_CERT} \
  --key=${ETCD_KEY}
    • https://192.168.10.50:2379 is healthy: successfully committed proposal: took = 32.557549ms などの標準出力が確認できれば疎通できている

etcd バックアップ

  • https://github.com/etcd-io/etcd/tree/main/etcdctl#snapshot-save-filename 
    ETCD_ENDPOINT=https://192.168.10.50:2379
ETCD_CACERT=/etc/etcd/ca.pem
ETCD_CERT=/etc/etcd/kubernetes.pem
ETCD_KEY=/etc/etcd/kubernetes-key.pem

ETCDCTL_API=3 etcdctl snapshot save snapshot.db \
  --endpoints=${ETCD_ENDPOINT} \
  --cacert=${ETCD_CACERT} \
  --cert=${ETCD_CERT} \
  --key=${ETCD_KEY}

バックアップファイルの情報を確認

  • https://github.com/etcd-io/etcd/tree/main/etcdctl#snapshot-status-filename 
    ETCDCTL_API=3 etcdctl snapshot status snapshot.db
    • 以下のような出力が確認できます 
      +----------+----------+------------+------------+---------+
|   HASH   | REVISION | TOTAL KEYS | TOTAL SIZE | VERSION |
+----------+----------+------------+------------+---------+
| c9a815d0 |     3356 |        488 |     1.1 MB |         |
+----------+----------+------------+------------+---------+

etcd リストア