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数据库-etcd备份恢复

时间：2023-08-10 16:37:59浏览次数：46  
标签：备份 11.0 snapshot etcd go home kube 数据库

1.member下数据说明：

snap：存放快照数据,etcd防止WAL文件过多而设置的快照，存储etcd数据状态
wal：存放预写式日志,最大的作用是记录了整个数据变化的全部历程。在etcd中，所有数据的修改在提交前，都要先写入到WAL中

 

2.备份，只需要备份其中一台etcd export ETCDCTL_API=3

/home/s/bin/etcdctl  --endpoints=https://ip:2379  --cacert=/home/s/cert/kube_etcd/ca.pem --cert=/home/s/cert/kube_etcd/client.pem --key=/home/s/cert/kube_etcd/client-key.pem  snapshot save /home/s/backup/etcd/etcd.db

[root@localhost kube_etcd]# /home/s/bin/etcdctl  --endpoints=https://11.0.1.149:2379  --cacert=/home/s/cert/kube_etcd/ca.pem --cert=/home/s/cert/kube_etcd/client.pem --key=/home/s/cert/kube_etcd/client-key.pem  snapshot save /home/s/etcd.db
{"level":"info","ts":1691654104.1296446,"caller":"snapshot/v3_snapshot.go:68","msg":"created temporary db file","path":"/home/s/etcd.db.part"}
{"level":"info","ts":1691654104.1369681,"logger":"client","caller":"v3/maintenance.go:211","msg":"opened snapshot stream; downloading"}
{"level":"info","ts":1691654104.1370292,"caller":"snapshot/v3_snapshot.go:76","msg":"fetching snapshot","endpoint":"https://11.0.1.149:2379"}
{"level":"info","ts":1691654104.4866412,"logger":"client","caller":"v3/maintenance.go:219","msg":"completed snapshot read; closing"}
{"level":"info","ts":1691654104.525598,"caller":"snapshot/v3_snapshot.go:91","msg":"fetched snapshot","endpoint":"https://11.0.1.149:2379","size":"23 MB","took":"now"}
{"level":"info","ts":1691654104.5257566,"caller":"snapshot/v3_snapshot.go:100","msg":"saved","path":"/home/s/etcd.db"}
Snapshot saved at /home/s/etcd.db

 

 

3.恢复数据， 恢复需要三台etcd都执行

a、关闭etcd服务： systemctl stop kube_etcd

b、移除旧数据

 rm -rf /home/s/data/kube_etcd/member

c、复制etcd.db备份文件到另外两台

for i etcd2,etcd3;do scp etcd.db root@i:/root ;done

d、恢复数据

[root@localhost data]# /home/s/bin/etcdctl   --cacert=/home/s/cert/kube_etcd/ca.pem --cert=/home/s/cert/kube_etcd/client.pem --key=/home/s/cert/kube_etcd/client-key.pem  snapshot restore /root/etcd-snap73.db  --data-dir=/home/s/data/kube_etcd/   --initial-advertise-peer-urls=https://11.0.1.149:2380  --initial-cluster="11.0.1.149=https://11.0.1.149:2380,11.0.1.150=https://11.0.1.150:2380,11.0.1.151=https://11.0.1.151:2380"  --name 11.0.1.149
Deprecated: Use `etcdutl snapshot restore` instead.

2023-08-10T16:06:07+08:00    info    snapshot/v3_snapshot.go:251    restoring snapshot    {"path": "/root/etcd-snap73.db", "wal-dir": "/home/s/data/kube_etcd/member/wal", "data-dir": "/home/s/data/kube_etcd/", "snap-dir": "/home/s/data/kube_etcd/member/snap", "stack": "go.etcd.io/etcd/etcdutl/v3/snapshot.(*v3Manager).Restore\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdutl/snapshot/v3_snapshot.go:257\ngo.etcd.io/etcd/etcdutl/v3/etcdutl.SnapshotRestoreCommandFunc\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdutl/etcdutl/snapshot_command.go:147\ngo.etcd.io/etcd/etcdctl/v3/ctlv3/command.snapshotRestoreCommandFunc\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdctl/ctlv3/command/snapshot_command.go:128\ngithub.com/spf13/cobra.(*Command).execute\n\t/home/remote/sbatsche/.gvm/pkgsets/go1.16.3/global/pkg/mod/github.com/spf13/[email protected]/command.go:856\ngithub.com/spf13/cobra.(*Command).ExecuteC\n\t/home/remote/sbatsche/.gvm/pkgsets/go1.16.3/global/pkg/mod/github.com/spf13/[email protected]/command.go:960\ngithub.com/spf13/cobra.(*Command).Execute\n\t/home/remote/sbatsche/.gvm/pkgsets/go1.16.3/global/pkg/mod/github.com/spf13/[email protected]/command.go:897\ngo.etcd.io/etcd/etcdctl/v3/ctlv3.Start\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdctl/ctlv3/ctl.go:107\ngo.etcd.io/etcd/etcdctl/v3/ctlv3.MustStart\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdctl/ctlv3/ctl.go:111\nmain.main\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdctl/main.go:59\nruntime.main\n\t/home/remote/sbatsche/.gvm/gos/go1.16.3/src/runtime/proc.go:225"}
2023-08-10T16:06:07+08:00    info    membership/store.go:119    Trimming membership information from the backend...
2023-08-10T16:06:07+08:00    info    membership/cluster.go:393    added member    {"cluster-id": "af94405c9fa143f5", "local-member-id": "0", "added-peer-id": "6e45a7efe4f43e72", "added-peer-peer-urls": ["https://11.0.1.149:2380"]}
2023-08-10T16:06:07+08:00    info    membership/cluster.go:393    added member    {"cluster-id": "af94405c9fa143f5", "local-member-id": "0", "added-peer-id": "83b35c880ec44a22", "added-peer-peer-urls": ["https://11.0.1.151:2380"]}
2023-08-10T16:06:07+08:00    info    membership/cluster.go:393    added member    {"cluster-id": "af94405c9fa143f5", "local-member-id": "0", "added-peer-id": "d0c21986d57fb7ce", "added-peer-peer-urls": ["https://11.0.1.150:2380"]}
2023-08-10T16:06:07+08:00    info    snapshot/v3_snapshot.go:272    restored snapshot    {"path": "/root/etcd-snap73.db", "wal-dir": "/home/s/data/kube_etcd/member/wal", "data-dir": "/home/s/data/kube_etcd/", "snap-dir": "/home/s/data/kube_etcd/member/snap"}
[root@localhost kube_etcd]# export ETCDCTL_API=3
[root@localhost kube_etcd]# ls
[root@localhost kube_etcd]# /home/s/bin/etcdctl   --cacert=/home/s/cert/kube_etcd/ca.pem --cert=/home/s/cert/kube_etcd/client.pem --key=/home/s/cert/kube_etcd/client-key.pem  snapshot restore /root/etcd-snap73.db  --data-dir=/home/s/data/kube_etcd   --initial-advertise-peer-urls=https://11.0.1.150:2380  --initial-cluster="11.0.1.149=https://11.0.1.149:2380,11.0.1.150=https://11.0.1.150:2380,11.0.1.151=https://11.0.1.151:2380"  --name 11.0.1.150
Deprecated: Use `etcdutl snapshot restore` instead.

2023-08-10T16:07:39+08:00    info    snapshot/v3_snapshot.go:251    restoring snapshot    {"path": "/root/etcd-snap73.db", "wal-dir": "/home/s/data/kube_etcd/member/wal", "data-dir": "/home/s/data/kube_etcd", "snap-dir": "/home/s/data/kube_etcd/member/snap", "stack": "go.etcd.io/etcd/etcdutl/v3/snapshot.(*v3Manager).Restore\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdutl/snapshot/v3_snapshot.go:257\ngo.etcd.io/etcd/etcdutl/v3/etcdutl.SnapshotRestoreCommandFunc\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdutl/etcdutl/snapshot_command.go:147\ngo.etcd.io/etcd/etcdctl/v3/ctlv3/command.snapshotRestoreCommandFunc\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdctl/ctlv3/command/snapshot_command.go:128\ngithub.com/spf13/cobra.(*Command).execute\n\t/home/remote/sbatsche/.gvm/pkgsets/go1.16.3/global/pkg/mod/github.com/spf13/[email protected]/command.go:856\ngithub.com/spf13/cobra.(*Command).ExecuteC\n\t/home/remote/sbatsche/.gvm/pkgsets/go1.16.3/global/pkg/mod/github.com/spf13/[email protected]/command.go:960\ngithub.com/spf13/cobra.(*Command).Execute\n\t/home/remote/sbatsche/.gvm/pkgsets/go1.16.3/global/pkg/mod/github.com/spf13/[email protected]/command.go:897\ngo.etcd.io/etcd/etcdctl/v3/ctlv3.Start\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdctl/ctlv3/ctl.go:107\ngo.etcd.io/etcd/etcdctl/v3/ctlv3.MustStart\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdctl/ctlv3/ctl.go:111\nmain.main\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdctl/main.go:59\nruntime.main\n\t/home/remote/sbatsche/.gvm/gos/go1.16.3/src/runtime/proc.go:225"}
2023-08-10T16:07:39+08:00    info    membership/store.go:119    Trimming membership information from the backend...
2023-08-10T16:07:39+08:00    info    membership/cluster.go:393    added member    {"cluster-id": "af94405c9fa143f5", "local-member-id": "0", "added-peer-id": "6e45a7efe4f43e72", "added-peer-peer-urls": ["https://11.0.1.149:2380"]}
2023-08-10T16:07:39+08:00    info    membership/cluster.go:393    added member    {"cluster-id": "af94405c9fa143f5", "local-member-id": "0", "added-peer-id": "83b35c880ec44a22", "added-peer-peer-urls": ["https://11.0.1.151:2380"]}
2023-08-10T16:07:39+08:00    info    membership/cluster.go:393    added member    {"cluster-id": "af94405c9fa143f5", "local-member-id": "0", "added-peer-id": "d0c21986d57fb7ce", "added-peer-peer-urls": ["https://11.0.1.150:2380"]}
2023-08-10T16:07:39+08:00    info    snapshot/v3_snapshot.go:272    restored snapshot    {"path": "/root/etcd-snap73.db", "wal-dir": "/home/s/data/kube_etcd/member/wal", "data-dir": "/home/s/data/kube_etcd", "snap-dir": "/home/s/data/kube_etcd/member/snap"}
[root@localhost kube_etcd]# ls
member
[root@localhost kube_etcd]# export ETCDCTL_API=3
[root@localhost kube_etcd]# /home/s/bin/etcdctl   --cacert=/home/s/cert/kube_etcd/ca.pem --cert=/home/s/cert/kube_etcd/client.pem --key=/home/s/cert/kube_etcd/client-key.pem  snapshot restore /root/etcd-snap73.db  --data-dir=/home/s/data/kube_etcd   --initial-advertise-peer-urls=https://11.0.1.151:2380  --initial-cluster="11.0.1.149=https://11.0.1.149:2380,11.0.1.150=https://11.0.1.150:2380,11.0.1.151=https://11.0.1.151:2380"  --name 11.0.1.151
Deprecated: Use `etcdutl snapshot restore` instead.

2023-08-10T16:09:06+08:00    info    snapshot/v3_snapshot.go:251    restoring snapshot    {"path": "/root/etcd-snap73.db", "wal-dir": "/home/s/data/kube_etcd/member/wal", "data-dir": "/home/s/data/kube_etcd", "snap-dir": "/home/s/data/kube_etcd/member/snap", "stack": "go.etcd.io/etcd/etcdutl/v3/snapshot.(*v3Manager).Restore\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdutl/snapshot/v3_snapshot.go:257\ngo.etcd.io/etcd/etcdutl/v3/etcdutl.SnapshotRestoreCommandFunc\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdutl/etcdutl/snapshot_command.go:147\ngo.etcd.io/etcd/etcdctl/v3/ctlv3/command.snapshotRestoreCommandFunc\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdctl/ctlv3/command/snapshot_command.go:128\ngithub.com/spf13/cobra.(*Command).execute\n\t/home/remote/sbatsche/.gvm/pkgsets/go1.16.3/global/pkg/mod/github.com/spf13/[email protected]/command.go:856\ngithub.com/spf13/cobra.(*Command).ExecuteC\n\t/home/remote/sbatsche/.gvm/pkgsets/go1.16.3/global/pkg/mod/github.com/spf13/[email protected]/command.go:960\ngithub.com/spf13/cobra.(*Command).Execute\n\t/home/remote/sbatsche/.gvm/pkgsets/go1.16.3/global/pkg/mod/github.com/spf13/[email protected]/command.go:897\ngo.etcd.io/etcd/etcdctl/v3/ctlv3.Start\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdctl/ctlv3/ctl.go:107\ngo.etcd.io/etcd/etcdctl/v3/ctlv3.MustStart\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdctl/ctlv3/ctl.go:111\nmain.main\n\t/tmp/etcd-release-3.5.0/etcd/release/etcd/etcdctl/main.go:59\nruntime.main\n\t/home/remote/sbatsche/.gvm/gos/go1.16.3/src/runtime/proc.go:225"}
2023-08-10T16:09:07+08:00    info    membership/store.go:119    Trimming membership information from the backend...
2023-08-10T16:09:07+08:00    info    membership/cluster.go:393    added member    {"cluster-id": "af94405c9fa143f5", "local-member-id": "0", "added-peer-id": "6e45a7efe4f43e72", "added-peer-peer-urls": ["https://11.0.1.149:2380"]}
2023-08-10T16:09:07+08:00    info    membership/cluster.go:393    added member    {"cluster-id": "af94405c9fa143f5", "local-member-id": "0", "added-peer-id": "83b35c880ec44a22", "added-peer-peer-urls": ["https://11.0.1.151:2380"]}
2023-08-10T16:09:07+08:00    info    membership/cluster.go:393    added member    {"cluster-id": "af94405c9fa143f5", "local-member-id": "0", "added-peer-id": "d0c21986d57fb7ce", "added-peer-peer-urls": ["https://11.0.1.150:2380"]}
2023-08-10T16:09:07+08:00    info    snapshot/v3_snapshot.go:272    restored snapshot    {"path": "/root/etcd-snap73.db", "wal-dir": "/home/s/data/kube_etcd/member/wal", "data-dir": "/home/s/data/kube_etcd", "snap-dir": "/home/s/data/kube_etcd/member/snap"}

e、启动服务，三台都执行

注意： 由于我的服务启动用户是bsafe， 所以要修改member目录用户

[root@localhost kube_etcd]# chown -R bsafe:bsafe /home/s/data/kube_etcd/member
[root@localhost kube_etcd]# ll
total 0
drwx------. 4 bsafe bsafe 29 Aug 10 16:09 member
[root@localhost kube_etcd]# systemctl start kube_etcd
[root@localhost kube_etcd]# systemctl status kube_etcd
● kube_etcd.service - kubenetes etcd key-value store
   Loaded: loaded (/etc/systemd/system/kube_etcd.service; enabled; vendor preset: disabled)
   Active: active (running) since Thu 2023-08-10 16:11:18 CST; 3s ago
     Docs: https://github.com/coreos/etcd
 Main PID: 11400 (etcd)
   CGroup: /system.slice/kube_etcd.service
           └─11400 /home/s/bin/etcd --config-file /home/s/etc/kube_etcd/kube_etcd.conf

Aug 10 16:11:18 localhost.localdomain etcd[11400]: {"level":"info","ts":"2023-08-10T16:11:18.106+0800","caller":"rafthttp/stream.go:169","msg":"started stream writer with remote peer","local-me...7efe4f43e72"}
Aug 10 16:11:18 localhost.localdomain etcd[11400]: {"level":"info","ts":"2023-08-10T16:11:18.106+0800","caller":"rafthttp/stream.go:395","msg":"started stream reader with remote peer","stream-r...7efe4f43e72"}
Aug 10 16:11:18 localhost.localdomain etcd[11400]: {"level":"info","ts":"2023-08-10T16:11:18.106+0800","caller":"rafthttp/stream.go:395","msg":"started stream reader with remote peer","stream-r...7efe4f43e72"}
Aug 10 16:11:18 localhost.localdomain etcd[11400]: {"level":"info","ts":"2023-08-10T16:11:18.106+0800","caller":"rafthttp/stream.go:169","msg":"started stream writer with remote peer","local-me...986d57fb7ce"}
Aug 10 16:11:18 localhost.localdomain etcd[11400]: {"level":"info","ts":"2023-08-10T16:11:18.107+0800","caller":"rafthttp/stream.go:169","msg":"started stream writer with remote peer","local-me...986d57fb7ce"}
Aug 10 16:11:18 localhost.localdomain etcd[11400]: {"level":"info","ts":"2023-08-10T16:11:18.107+0800","caller":"rafthttp/stream.go:395","msg":"started stream reader with remote peer","stream-r...986d57fb7ce"}
Aug 10 16:11:18 localhost.localdomain etcd[11400]: {"level":"info","ts":"2023-08-10T16:11:18.107+0800","caller":"rafthttp/stream.go:395","msg":"started stream reader with remote peer","stream-r...986d57fb7ce"}
Aug 10 16:11:18 localhost.localdomain etcd[11400]: {"level":"info","ts":"2023-08-10T16:11:18.107+0800","caller":"etcdserver/server.go:744","msg":"starting initial election tick advance","election-ticks":16}
Aug 10 16:11:18 localhost.localdomain etcd[11400]: {"level":"info","ts":"2023-08-10T16:11:18.109+0800","caller":"embed/etcd.go:580","msg":"serving peer traffic","address":"11.0.1.151:2380"}
Aug 10 16:11:18 localhost.localdomain etcd[11400]: {"level":"info","ts":"2023-08-10T16:11:18.109+0800","caller":"embed/etcd.go:552","msg":"cmux::serve","address":"11.0.1.151:2380"}
Hint: Some lines were ellipsized, use -l to show in full.

f、查看etcd集群状态

[root@localhost data]#  /home/s/bin/etcdctl  --endpoints=https://11.0.1.149:2379,https://11.0.1.150:2379,https://11.0.1.151:2379  --cacert=/home/s/cert/kube_etcd/ca.pem --cert=/home/s/cert/kube_etcd/client.pem --key=/home/s/cert/kube_etcd/client-key.pem  endpoint status --write-out=table
+-------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
|        ENDPOINT         |        ID        | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+-------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| https://11.0.1.149:2379 | 6e45a7efe4f43e72 |   3.5.0 |   23 MB |     false |      false |         2 |         11 |                 11 |        |
| https://11.0.1.150:2379 | d0c21986d57fb7ce |   3.5.0 |   23 MB |     false |      false |         2 |         11 |                 11 |        |
| https://11.0.1.151:2379 | 83b35c880ec44a22 |   3.5.0 |   23 MB |      true |      false |         2 |         11 |                 11 |        |
+-------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------

 

[root@localhost data]#  /home/s/bin/etcdctl  --endpoints=https://11.0.1.149:2379,https://11.0.1.150:2379,https://11.0.1.151:2379  --cacert=/home/s/cert/kube_etcd/ca.pem --cert=/home/s/cert/kube_etcd/client.pem --key=/home/s/cert/kube_etcd/client-key.pem  endpoint health
https://11.0.1.151:2379 is healthy: successfully committed proposal: took = 19.705544ms
https://11.0.1.150:2379 is healthy: successfully committed proposal: took = 19.187536ms
https://11.0.1.149:2379 is healthy: successfully committed proposal: took = 23.052489ms

 

 

说明：

1.k8s下， 容器部署的etcd， 原理一样， 注意停服：/etc/kubernetes/manifests 把静态pod yaml移走就会自动停服
2.etcd配置文件

name: "11.0.1.149"
data-dir: /home/s/data/kube_etcd
wal-dir: 
snapshot-count: 50000
heartbeat-interval: 300
election-timeout: 5000
max-request-bytes: 10485760
quota-backend-bytes: 5368709120
listen-peer-urls: https://11.0.1.149:2380
listen-client-urls: http://localhost:2379,https://11.0.1.149:2379
max-snapshots: 5
max-wals: 3
cors: 
initial-advertise-peer-urls: https://11.0.1.149:2380
advertise-client-urls: https://11.0.1.149:2379
discovery: 
discovery-fallback: 'proxy'
discovery-proxy: 
discovery-srv: 

initial-cluster: "11.0.1.149=https://11.0.1.149:2380,11.0.1.150=https://11.0.1.150:2380,11.0.1.151=https://11.0.1.151:2380"

initial-cluster-token: 'etcd-cluster'
initial-cluster-state: 'existing'
strict-reconfig-check: false
enable-v2: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0

client-transport-security: 
  ca-file: 
  cert-file: /home/s/cert/kube_etcd/peer.pem
  key-file: /home/s/cert/kube_etcd/peer-key.pem
  client-cert-auth: False
  trusted-ca-file: /home/s/cert/kube_etcd/ca.pem
  auto-tls: false

peer-transport-security: 
  ca-file:
  cert-file: /home/s/cert/kube_etcd/peer.pem
  key-file: /home/s/cert/kube_etcd/peer-key.pem
  client-cert-auth: False
  trusted-ca-file: /home/s/cert/kube_etcd/ca.pem
  auto-tls: false

debug: false
log-package-levels: 
force-new-cluster: false
auto-compaction-mode: periodic
auto-compaction-retention: "1"
View Code

 

标签：备份,11.0,snapshot,etcd,go,home,kube,数据库
From： https://www.cnblogs.com/aroin/p/17620703.html

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