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一篇带给你ETCD入门指南
发布时间：2025-11-05 01:28:22 来源：云智核 作者：域名
前言
之前对etcd不是篇带很了解，于是篇带下定决心学习一下。随手把过程记录了一下，篇带希望对大家有帮助。篇带
环境说明如下：
一、篇带集群搭建
我这里将etcd部署在虚拟机上，篇带采取静态配置，篇带即在etcd各节点在配置中指定。篇带
1.所有节点下载etcd并解压、篇带移动至/usr/local/bin/，篇带并给予对应权限
# 下载地址：https://github.com/etcd-io/etcd/releases wget https://github.com/coreos/etcd/releases/download/v3.4.16/etcd-v3.4.16-linux-amd64.tar.gz tar -zxvf etcd-v3.4.16-linux-amd64.tar.gz cd etcd* mv etcdctl etcd /usr/local/bin chmod +x /usr/local/bin/etcd*2.证书文件
# 证书文件 ca-config.json etcd-ca-csr.json etcd-csr.json cat ca-config.json { "signing": { "default": { "expiry": "876000h" },篇带 "profiles": { "kubernetes": { "usages": [ "signing", "key encipherment", "server auth", "client auth" ], "expiry": "876000h" } } } } cat etcd-ca-csr-json { "CN": "etcd", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "ST": "Shenzhen", "L": "Shenzhen", "O": "etcd", "OU": "Etcd Security" } ] } cat etcd-csr.json { "CN": "etcd", "hosts": [ "127.0.0.1", "10.211.55.50", "10.211.55.51", "10.211.55.52" ], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "ST": "Shenzhen", "L": "Shenzhen", "O": "etcd", "OU": "Etcd Security" } ] }3.etcd-ca证书
cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare etcd-ca # 查看证书文件 [root@etcd1 opt]# ls -al total 36 drwxr-xr-x. 2 root root 186 May 13 21:53 . dr-xr-xr-x. 17 root root 244 Oct 21 2020 .. -rw------- 1 root root 294 Nov 27 2019 ca-config.json -rw-r--r-- 1 root root 1005 May 13 21:53 etcd-ca.csr -rw------- 1 root root 212 Nov 27 2019 etcd-ca-csr.json -rw------- 1 root root 1675 May 13 21:53 etcd-ca-key.pem -rw-r--r-- 1 root root 1371 May 13 21:53 etcd-ca.pem -rw------- 1 root root 374 May 13 21:48 etcd-csr.json4.生成etcd证书
cfssl gencert -ca=etcd-ca.pem -ca-key=etcd-ca-key.pem -config=ca-config.json -profile=kubernetes etcd-csr.json | cfssljson -bare etcd # 查看证书 ls -al total 36 drwxr-xr-x. 2 root root 186 May 13 21:53 . dr-xr-xr-x. 17 root root 244 Oct 21 2020 .. -rw------- 1 root root 294 Nov 27 2019 ca-config.json -rw-r--r-- 1 root root 1005 May 13 21:53 etcd-ca.csr -rw------- 1 root root 212 Nov 27 2019 etcd-ca-csr.json -rw------- 1 root root 1675 May 13 21:53 etcd-ca-key.pem -rw-r--r-- 1 root root 1371 May 13 21:53 etcd-ca.pem -rw-r--r-- 1 root root 1078 May 13 21:53 etcd.csr -rw------- 1 root root 374 May 13 21:48 etcd-csr.json -rw------- 1 root root 1679 May 13 21:53 etcd-key.pem -rw-r--r-- 1 root root 1456 May 13 21:53 etcd.pem5.复制到etcd的证书到证书目录
mkdir -pv /etc/etcd/ssl && cp etcd*.pem /etc/etcd/ssl # 复制证书目录到其他节点 scp -r /etc/etcd root@etcd2 scp -r /etc/etcd root@etcd36.配置成系统服务
cat etcd.service # 要根据每个节点进行修改IP和name [Unit] Description=Etcd Server After=network.target After=network-online.target Wants=network-online.target Documentation=https://github.com/coreos [Service] Type=notify WorkingDirectory=/var/lib/etcd/ EnvironmentFile=-/etc/etcd/etcd.conf ExecStart=/usr/local/bin/etcd \ --name=etcd1 \ --cert-file=/etc/etcd/ssl/etcd.pem \ --key-file=/etc/etcd/ssl/etcd-key.pem \ --peer-cert-file=/etc/etcd/ssl/etcd.pem \ --peer-key-file=/etc/etcd/ssl/etcd-key.pem \ --trusted-ca-file=/etc/etcd/ssl/etcd-ca.pem \ --peer-trusted-ca-file=/etc/etcd/ssl/etcd-ca.pem \ --initial-advertise-peer-urls=https://10.211.55.50:2380 \ --listen-peer-urls=https://10.211.55.50:2380 \ --listen-client-urls=https://10.211.55.50:2379,http://127.0.0.1:2379 \ --advertise-client-urls=https://10.211.55.50:2379 \ --initial-cluster-token=etcd-cluster-0 \ --initial-cluster=etcd1=https://10.211.55.50:2380,etcd2=https://10.211.55.51:2380,etcd3=https://10.211.55.52:2380 \ --initial-cluster-state=new \ --data-dir=/var/lib/etcd Restart=on-failure RestartSec=5 LimitNOFILE=65536 [Install] WantedBy=multi-user.target7.启动etcd
# 三个节点启动etcd服务 systemctl daemon-reload && systemctl enable etcd && systemctl start etcd8.检查集群状态
# 检查member etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.52:2379 member list -w table +------------------+---------+-------+---------------------------+---------------------------+------------+ | ID | STATUS | NAME | PEER ADDRS | CLIENT ADDRS | IS LEARNER | +------------------+---------+-------+---------------------------+---------------------------+------------+ | ca2cb14b2acc776 | started | etcd3 | https://10.211.55.52:2380 | https://10.211.55.52:2379 | false | | 31f517c6aefb1a37 | started | etcd1 | https://10.211.55.50:2380 | https://10.211.55.50:2379 | false | | ad1ee26f89ef12f4 | started | etcd2 | https://10.211.55.51:2380 | https://10.211.55.51:2379 | false | +------------------+---------+-------+---------------------------+---------------------------+------------+ # 查看是否有LD etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 endpoint status -w table +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS | +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | https://10.211.55.50:2379 | 31f517c6aefb1a37 | 3.4.16 | 25 kB | true | false | 645 | 54 | 54 | | | https://10.211.55.51:2379 | ad1ee26f89ef12f4 | 3.4.16 | 20 kB | false | false | 645 | 54 | 54 | | | https://10.211.55.52:2379 | ca2cb14b2acc776 | 3.4.16 | 20 kB | false | false | 645 | 54 | 54 | | +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ # 尝试写入数据 etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 put foo4 bar4 # 读取数据 etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 get foo4 foo4 bar4 # 获取所有key etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 get --prefix --keys-only foo foo2 foo3 foo4 # 只获取value etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 get --print-value-only --prefix=true bar bar2 bar3 bar # 获取指定key、rev的篇带数据 etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 get foo4 -w json {"header":{"cluster_id":9218922165880849559,"member_id":910513364439713654,"revision":10,"raft_term":645},"kvs":[{"key":"Zm9vNA==","create_revision":7,"mod_revision":10,"version":4,"value":"eGl5YW5neGl4aQ=="}],"count":1} etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 get foo4 -w json --rev=8 {"header":{"cluster_id":9218922165880849559,"member_id":3599809619259234871,"revision":10,"raft_term":645},"kvs":[{"key":"Zm9vNA==","create_revision":7,"mod_revision":8,"version":2,"value":"eGl5YW5neGl4aWE="}],"count":1}二、成员变更
删除成员
因为我的篇带资源有限，免费信息发布网所以先模拟删除成员再添加成员。篇带
# 先检查集群状态并获取成员ID etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,篇带https://10.211.55.51:2379,https://10.211.55.52:2379 endpoint status -w table +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS | +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | https://10.211.55.50:2379 | 31f517c6aefb1a37 | 3.4.16 | 25 kB | true | false | 645 | 54 | 54 | | | https://10.211.55.51:2379 | ad1ee26f89ef12f4 | 3.4.16 | 20 kB | false | false | 645 | 54 | 54 | | | https://10.211.55.52:2379 | ca2cb14b2acc776 | 3.4.16 | 20 kB | false | false | 645 | 54 | 54 | | +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ # 通过ID删除成员，这里以删除10.211.55.52为例 etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379 member remove ca2cb14b2acc776 Member ca2cb14b2acc776 removed from cluster 7ff030ddad4d8497 # 检查集群状态，只有两个节点了 etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 endpoint status -w table +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS | +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | https://10.211.55.50:2379 | 31f517c6aefb1a37 | 3.4.16 | 25 kB | true | false | 645 | 58 | 58 | | | https://10.211.55.51:2379 | ad1ee26f89ef12f4 | 3.4.16 | 20 kB | false | false | 645 | 58 | 58 | | +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ # 查看10.211.55.52 etcd状态，发现etcd systemctl status etcd ● etcd.service - Etcd Server Loaded: loaded (/etc/systemd/system/etcd.service; enabled; vendor preset: disabled) Active: inactive (dead) since Sun 2021-07-04 11:39:42 CST; 1min 31s ago ...... # 尝试写入数据 etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379 put foo4 bar8 OK # 尝试获取写入的数据 etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379 get foo4 foo4 bar8添加成员
添加成员主要分为两步，一是通过etcdctl添加成员，二是根据第一步输出的配置修改etcd配置并启动etcd
# 先通过etcdctl添加成员 etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379 member add etcd3 --peer-urls="https://10.211.55.52:2380" Member 89088d035064124d added to cluster 7ff030ddad4d8497 ETCD_NAME="etcd3" ETCD_INITIAL_CLUSTER="etcd1=https://10.211.55.50:2380,etcd3=https://10.211.55.52:2380,etcd2=https://10.211.55.51:2380" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.211.55.52:2380" ETCD_INITIAL_CLUSTER_STATE="existing" # 更改etcd配置并启动etcd，注意要保证etcd数据目录为空 systemctl cat etcd # /etc/systemd/system/etcd.service [Unit] Description=Etcd Server After=network.target After=network-online.target Wants=network-online.target Documentation=https://github.com/coreos [Service] Type=notify WorkingDirectory=/var/lib/etcd/ EnvironmentFile=-/etc/etcd/etcd.conf ExecStart=/usr/local/bin/etcd \ --name=etcd3 \ --cert-file=/etc/etcd/ssl/etcd.pem \ --key-file=/etc/etcd/ssl/etcd-key.pem \ --peer-cert-file=/etc/etcd/ssl/etcd.pem \ --peer-key-file=/etc/etcd/ssl/etcd-key.pem \ --trusted-ca-file=/etc/etcd/ssl/etcd-ca.pem \ --peer-trusted-ca-file=/etc/etcd/ssl/etcd-ca.pem \ --initial-advertise-peer-urls=https://10.211.55.52:2380 \ --listen-peer-urls=https://10.211.55.52:2380 \ --listen-client-urls=https://10.211.55.52:2379,http://127.0.0.1:2379 \ --advertise-client-urls=https://10.211.55.52:2379 \ --initial-cluster-token=etcd-cluster-0 \ --initial-cluster=etcd1=https://10.211.55.50:2380,etcd2=https://10.211.55.51:2380,etcd3=https://10.211.55.52:2380 \ --initial-cluster-state=existing \ --data-dir=/var/lib/etcd Restart=on-failure RestartSec=5 LimitNOFILE=65536 [Install] WantedBy=multi-user.target # 启动etcd systemctl start etcd && systemctl status etcd # 检查集群状态 etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 endpoint status -w table +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS | +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | https://10.211.55.50:2379 | 31f517c6aefb1a37 | 3.4.16 | 25 kB | true | false | 645 | 62 | 62 | | | https://10.211.55.51:2379 | ad1ee26f89ef12f4 | 3.4.16 | 20 kB | false | false | 645 | 62 | 62 | | | https://10.211.55.52:2379 | 89088d035064124d | 3.4.16 | 20 kB | false | false | 645 | 62 | 62 | | +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+三、数据备份
数据备份我这里直接使用snapshot人工备份好了，仅用于测试而已。
# 先写入一个数据，方便后面做测试 etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 put xiyangxixi boys OK etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 get xiyangxixi xiyangxixi boys # 备份数据 etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379 snapshot save snapshot-xiyangxixi.db {"level":"info","ts":1625373129.2212617,"caller":"snapshot/v3_snapshot.go:119","msg":"created temporary db file","path":"snapshot-xiyangxixi.db.part"} {"level":"info","ts":"2021-07-04T12:32:09.228+0800","caller":"clientv3/maintenance.go:200","msg":"opened snapshot stream; downloading"} {"level":"info","ts":1625373129.2287908,"caller":"snapshot/v3_snapshot.go:127","msg":"fetching snapshot","endpoint":"https://10.211.55.50:2379"} {"level":"info","ts":"2021-07-04T12:32:09.231+0800","caller":"clientv3/maintenance.go:208","msg":"completed snapshot read; closing"} {"level":"info","ts":1625373129.2318149,"caller":"snapshot/v3_snapshot.go:142","msg":"fetched snapshot","endpoint":"https://10.211.55.50:2379","size":"25 kB","took":0.010441635} {"level":"info","ts":1625373129.2318769,"caller":"snapshot/v3_snapshot.go:152","msg":"saved","path":"snapshot-xiyangxixi.db"} Snapshot saved at snapshot-xiyangxixi.db四、集群数据恢复
需要使用同一个备份文件。这里以上面的云服务器提供商snapshot-xiyangxixi.db进行模拟。
# 注意： # 1、最好指定一下data-dir我这里没指定，结果数据都到etcd1.etcd、etcd2.etcd、etcd3.etcd中去了，这样子还得修改etcd.service文件 # 2、恢复数据前，之前的数据目录记得备份 # 3、如果是单节点故障，可以考虑删除该节点再添加该节点 # etcd1上执行 etcdctl snapshot restore /root/snapshot-xiyangxixi.db --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --name etcd1 --initial-advertise-peer-urls=https://10.211.55.50:2380 --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd1=https://10.211.55.50:2380,etcd2=https://10.211.55.51:2380,etcd3=https://10.211.55.52:2380 {"level":"info","ts":1625373977.7445557,"caller":"snapshot/v3_snapshot.go:296","msg":"restoring snapshot","path":"/root/snapshot-xiyangxixi.db","wal-dir":"etcd1.etcd/member/wal","data-dir":"etcd1.etcd","snap-dir":"etcd1.etcd/member/snap"} {"level":"info","ts":1625373977.7477813,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"517f2ff3c4b9581b","added-peer-peer-urls":["https://10.211.55.52:2380"]} {"level":"info","ts":1625373977.7478256,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"6856401bd8388bec","added-peer-peer-urls":["https://10.211.55.50:2380"]} {"level":"info","ts":1625373977.7478426,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"6ea7d2ec70c556d5","added-peer-peer-urls":["https://10.211.55.51:2380"]} {"level":"info","ts":1625373977.7509031,"caller":"snapshot/v3_snapshot.go:309","msg":"restored snapshot","path":"/root/snapshot-xiyangxixi.db","wal-dir":"etcd1.etcd/member/wal","data-dir":"etcd1.etcd","snap-dir":"etcd1.etcd/member/snap"} # etcd2上执行 etcdctl snapshot restore /root/snapshot-xiyangxixi.db --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --name etcd2 --initial-advertise-peer-urls=https://10.211.55.51:2380 --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd1=https://10.211.55.50:2380,etcd2=https://10.211.55.51:2380,etcd3=https://10.211.55.52:2380 {"level":"info","ts":1625374104.1673598,"caller":"snapshot/v3_snapshot.go:296","msg":"restoring snapshot","path":"/root/snapshot-xiyangxixi.db","wal-dir":"etcd2.etcd/member/wal","data-dir":"etcd2.etcd","snap-dir":"etcd2.etcd/member/snap"} {"level":"info","ts":1625374104.1709266,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"517f2ff3c4b9581b","added-peer-peer-urls":["https://10.211.55.52:2380"]} {"level":"info","ts":1625374104.1709714,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"6856401bd8388bec","added-peer-peer-urls":["https://10.211.55.50:2380"]} {"level":"info","ts":1625374104.1709878,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"6ea7d2ec70c556d5","added-peer-peer-urls":["https://10.211.55.51:2380"]} {"level":"info","ts":1625374104.1741195,"caller":"snapshot/v3_snapshot.go:309","msg":"restored snapshot","path":"/root/snapshot-xiyangxixi.db","wal-dir":"etcd2.etcd/member/wal","data-dir":"etcd2.etcd","snap-dir":"etcd2.etcd/member/snap"} # etcd3上执行 etcdctl snapshot restore /root/snapshot-xiyangxixi.db --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --name etcd3 --initial-advertise-peer-urls=https://10.211.55.52:2380 --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd1=https://10.211.55.50:2380,etcd2=https://10.211.55.51:2380,etcd3=https://10.211.55.52:2380 {"level":"info","ts":1625374158.713205,"caller":"snapshot/v3_snapshot.go:296","msg":"restoring snapshot","path":"/root/snapshot-xiyangxixi.db","wal-dir":"etcd3.etcd/member/wal","data-dir":"etcd3.etcd","snap-dir":"etcd3.etcd/member/snap"} {"level":"info","ts":1625374158.7164843,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"517f2ff3c4b9581b","added-peer-peer-urls":["https://10.211.55.52:2380"]} {"level":"info","ts":1625374158.7165308,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"6856401bd8388bec","added-peer-peer-urls":["https://10.211.55.50:2380"]} {"level":"info","ts":1625374158.7165465,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"6ea7d2ec70c556d5","added-peer-peer-urls":["https://10.211.55.51:2380"]} {"level":"info","ts":1625374158.7190611,"caller":"snapshot/v3_snapshot.go:309","msg":"restored snapshot","path":"/root/snapshot-xiyangxixi.db","wal-dir":"etcd3.etcd/member/wal","data-dir":"etcd3.etcd","snap-dir":"etcd3.etcd/member/snap"} # 启动etcd systemctl daemon-reload && systemctl start etcd # 查看etcd集群状态 etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 endpoint status -w table +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS | +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | https://10.211.55.50:2379 | 6856401bd8388bec | 3.4.16 | 25 kB | false | false | 4 | 8 | 8 | | | https://10.211.55.51:2379 | 6ea7d2ec70c556d5 | 3.4.16 | 25 kB | true | false | 4 | 8 | 8 | | | https://10.211.55.52:2379 | 517f2ff3c4b9581b | 3.4.16 | 25 kB | false | false | 4 | 8 | 8 | | +---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ # 获取key为xiyangxixi的数据 etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 get xiyangxixi xiyangxixi boys参考
https://etcd.io/docs/v3.4/op-guide/hardware/ https://etcd.io/docs/v3.4/op-guide/recovery/ https://etcd.io/docs/v3.4/op-guide/clustering/本文转载自微信公众号「运维开发故事」，可以通过以下二维码关注。转载本文请联系运维开发故事公众号。
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