插入测试数据
7369
# etcdctl put allen 7499
# etcdctl put ward 7521
# etcdctl put jones 7566
# etcdctl put martin 7654
# etcdctl put blake 7698
# etcdctl put clark 7782
# etcdctl put scott 7788
# etcdctl put king 7839
# etcdctl put turner 7844
# etcdctl put adams 7876
# etcdctl put james 7900
# etcdctl put ford 7902
# etcdctl put miller 7934查看数据
""
adams
7876
allen
7499
blake
7698
clark
7782
ford
7902
james
7900
jones
7566
king
7839
martin
7654
miller
7934
scott
7788
smith
7369
turner
7844
ward
7521做快照
# etcdctl snapshot save backup.db
{"level":"info","ts":1570085496.5022638,"caller":"snapshot/v3_snapshot.go:109","msg":"created temporary db file","path":"backup.db.part"}
{"level":"warn","ts":"2019-10-03T14:51:36.503+0800","caller":"clientv3/retry_interceptor.go:116","msg":"retry stream intercept"}
{"level":"info","ts":1570085496.5036564,"caller":"snapshot/v3_snapshot.go:120","msg":"fetching snapshot","endpoint":"127.0.0.1:2379"}
{"level":"info","ts":1570085496.5214782,"caller":"snapshot/v3_snapshot.go:133","msg":"fetched snapshot","endpoint":"127.0.0.1:2379","took":0.018938519}
{"level":"info","ts":1570085496.521635,"caller":"snapshot/v3_snapshot.go:142","msg":"saved","path":"backup.db"}
Snapshot saved at backup.db查看快照信息
write-out=table
+----------+----------+------------+------------+
| HASH | REVISION | TOTAL KEYS | TOTAL SIZE |
+----------+----------+------------+------------+
| 6d1803a9 | 110 | 146 | 37 kB |
+----------+----------+------------+------------+清空数据
""
14删除当前etcd的data目录，否则会报错目录已存在
rm -rf /usr/local/etcd/data恢复数据
dir="/usr/local/etcd/data"
{"level":"info","ts":1570085656.639806,"caller":"snapshot/v3_snapshot.go:286","msg":"restoring snapshot","path":"backup.db","wal-dir":"/usr/local/etcd/data/member/wal","data-dir":"/usr/local/etcd/data","snap-dir":"/usr/local/etcd/data/member/snap"}
{"level":"info","ts":1570085656.7266932,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"cdf818194e3a8c32","local-member-id":"0","added-peer-id":"8e9e05c52164694d","added-peer-peer-urls":["http://localhost:2380"]}
{"level":"info","ts":1570085656.7834268,"caller":"snapshot/v3_snapshot.go:299","msg":"restored snapshot","path":"backup.db","wal-dir":"/usr/local/etcd/data/member/wal","data-dir":"/usr/local/etcd/data","snap-dir":"/usr/local/etcd/data/member/snap"}恢复完成后需要将从备份重新生成的data目录的属主和属组修改为etcd系统服务中的对应属主和属组
chown -R tnuser.dba /usr/local/etcd/data重启etcd系统服务
# systemctl stop etcd
# systemctl start etcd再次查看恢复的数据
""
adams
7876
allen
7499
blake
7698
clark
7782
ford
7902
james
7900
jones
7566
king
7839
martin
7654
miller
7934
scott
7788
smith
7369
turner
7844
ward
7521