一篇带给你ETCD入门指南
前言
之前对etcd不是很了解，于是下定决心学习一下。随手把过程记录了一下，希望对大家有帮助。
让客户满意是我们工作的目标，不断超越客户的期望值来自于我们对这个行业的热爱。我们立志把好的技术通过有效、简单的方式提供给客户，将通过不懈努力成为客户在信息化领域值得信任、有价值的长期合作伙伴，公司提供的服务项目有：主机域名、网络空间、营销软件、网站建设、汉台网站维护、网站推广。
环境说明如下：
一、集群搭建
我这里将etcd部署在虚拟机上，采取静态配置，即在etcd各节点在配置中指定。
1.所有节点下载etcd并解压、移动至/usr/local/bin/，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"
- },
- "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.json
4.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.pem
5.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@etcd3
6.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.target
7.启动etcd
- # 三个节点启动etcd服务
- systemctl daemon-reload && systemctl enable etcd && systemctl start etcd
8.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
因为我的资源有限，所以先模拟删除成员再添加成员。
- # 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,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。
本文名称：一篇带给你ETCD入门指南
文章网址：http://www.shufengxianlan.com/qtweb/news30/76130.html
网站建设、网络推广公司-创新互联，是专注品牌与效果的网站制作，网络营销seo公司；服务项目有等
声明：本网站发布的内容（图片、视频和文字）以用户投稿、用户转载内容为主，如果涉及侵权请尽快告知，我们将会在第一时间删除。文章观点不代表本网站立场，如需处理请联系客服。电话：028-86922220；邮箱：631063699@qq.com。内容未经允许不得转载，或转载时需注明来源： 创新互联
- DB2文件系统已满的破解方案描述
- 怎么查看redis当前连接
- 香港云主机哪里好
- 构建完美多商户商城：数据库设计的精髓(多商户商城数据库设计)
- 为软件王国立法：从硬件产业的内幕说起
- 阿里云域名备案流程？阿里服务器备案
- 手机web——自适应网页设计（html/css控制）
- Linux的多元化发展：探析各种分支（linux的分支）
- 服务器运行失败怎么解决？这里有一些实用的方法！
- 不太贵的美国服务器都有哪些？适合外贸建站的，谢谢？做站美国服务器推荐
- 有服务器和域名怎么建站？(有域名后如何建站)
- 创新互联Python教程：python生成器如何实现
- 利用Redis链接MySQL加速数据处理（redis链接mysql）
- 5g是不是4g的演进？什么时候服务器是5G
- 如何选择适合自己的公司云存储平台？