需要安装：
dockerdocker-compose
参数详细：
–name：设置成员节点的别名，建议为每个成员节点配置可识别的命名–advertise-client-urls：广播到集群中本成员的监听客户端请求的地址–initial-advertise-peer-urls：广播到集群中本成员的Peer监听通信地址–listen-client-urls：客户端请求的监听地址列表–listen-peer-urls：Peer消息的监听服务地址列表–initial-cluster-token：启动集群的时候指定集群口令，只有相同token的几点才能加入到同一集群–initial-cluster：所有集群节点的地址列表–initial-cluster-state：初始化集群状态，默认为new，也可以指定为exi-string表示要加入到一个已有集群
创建etcd数据目录
mkdir -p ./etcd-node{1,2,3}创建docker网络
docker network create --driver bridge --subnet 172.62.0.0/16 --gateway 172.62.0.1 etcd-clusteretcd-cluster-compose.yml
version: '3'
networks:
etcd-cluster:
external: true
services:
etcd-node1:
image: quay.io/coreos/etcd:v3.3.1
container_name: etcd-node1
ports:
- "12379:2379"
- "12380:2380"
restart: always
volumes:
- ./etcd-node1:/data/app/etcd
command: etcd --name etcd-node1 --data-dir /data/app/etcd/ --advertise-client-urls http://172.62.0.10:2379 --initial-advertise-peer-urls http://172.62.0.10:2380 --listen-client-urls http://0.0.0.0:2379 --listen-peer-urls http://0.0.0.0:2380 --initial-cluster-token etcd-cluster --initial-cluster "etcd-node1=http://172.62.0.10:2380,etcd-node2=http://172.62.0.11:2380,etcd-node3=http://172.62.0.12:2380" --initial-cluster-state new
networks:
etcd-cluster:
ipv4_address: 172.62.0.10
etcd-node2:
image: quay.io/coreos/etcd:v3.3.1
container_name: etcd-node2
ports:
- "22379:2379"
- "22380:2380"
restart: always
volumes:
- ./etcd-node2:/data/app/etcd
command: etcd --name etcd-node2 --data-dir /data/app/etcd/ --advertise-client-urls http://172.62.0.11:2379 --initial-advertise-peer-urls http://172.62.0.11:2380 --listen-client-urls http://0.0.0.0:2379 --listen-peer-urls http://0.0.0.0:2380 --initial-cluster-token etcd-cluster --initial-cluster "etcd-node1=http://172.62.0.10:2380,etcd-node2=http://172.62.0.11:2380,etcd-node3=http://172.62.0.12:2380" --initial-cluster-state new
networks:
etcd-cluster:
ipv4_address: 172.62.0.11
etcd-node3:
image: quay.io/coreos/etcd:v3.3.1
container_name: etcd-node3
ports:
- "32379:2379"
- "32380:2380"
restart: always
volumes:
- ./etcd-node3:/data/app/etcd
command: etcd --name etcd-node3 --data-dir /data/app/etcd/ --advertise-client-urls http://172.62.0.12:2379 --initial-advertise-peer-urls http://172.62.0.12:2380 --listen-client-urls http://0.0.0.0:2379 --listen-peer-urls http://0.0.0.0:2380 --initial-cluster-token etcd-cluster --initial-cluster "etcd-node1=http://172.62.0.10:2380,etcd-node2=http://172.62.0.11:2380,etcd-node3=http://172.62.0.12:2380" --initial-cluster-state new
networks:
etcd-cluster:
ipv4_address: 172.62.0.12
启动并验证集群
启动
[root@k8s-node1 etcd-cluster]# docker-compose -f etcd-cluster-compose.yml up -d
Pulling etcd-node1 (quay.io/coreos/etcd:v3.3.1)...
v3.3.1: Pulling from coreos/etcd
ff3a5c916c92: Pull complete
dec5fcc85a18: Pull complete
3944f16f0112: Pull complete
0b6d29b049fe: Pull complete
d8c39ae91d38: Pull complete
42fcea4864ba: Pull complete
Digest: sha256:454e69370d87554dcb4272833b8f07ce1b5d457caa153bda4070b76d89a1cc97
Status: Downloaded newer image for quay.io/coreos/etcd:v3.3.1
Creating etcd-node1 ... done
Creating etcd-node2 ... done
Creating etcd-node3 ... done
[root@k8s-node1 etcd-cluster]# docker-compose -f etcd-cluster-compose.yml ps -a
Name Command State Ports
------------------------------------------------------------------------------------------------------
etcd-node1 etcd --name etcd-node1 --d ... Up 0.0.0.0:12379->2379/tcp, 0.0.0.0:12380->2380/tcp
etcd-node2 etcd --name etcd-node2 --d ... Up 0.0.0.0:22379->2379/tcp, 0.0.0.0:22380->2380/tcp
etcd-node3 etcd --name etcd-node3 --d ... Up 0.0.0.0:32379->2379/tcp, 0.0.0.0:32380->2380/tcp
验证集群
通过etcdctl member list命令可以查询出所有集群节点的列表并且结果一致即为成功
[root@k8s-node1 etcd-cluster]# docker exec -it etcd-node1 /bin/sh
/ # etcdctl member list
8cef47d732d4acff: name=etcd-node1 peerURLs=http://172.62.0.10:2380 clientURLs=http://172.62.0.10:2379 isLeader=false
c93af917b643516f: name=etcd-node3 peerURLs=http://172.62.0.12:2380 clientURLs=http://172.62.0.12:2379 isLeader=true
cdee7114ad135065: name=etcd-node2 peerURLs=http://172.62.0.11:2380 clientURLs=http://172.62.0.11:2379 isLeader=false
/ # exit
[root@k8s-node1 etcd-cluster]# docker exec -it etcd-node2 /bin/sh
/ # etcdctl member list
8cef47d732d4acff: name=etcd-node1 peerURLs=http://172.62.0.10:2380 clientURLs=http://172.62.0.10:2379 isLeader=false
c93af917b643516f: name=etcd-node3 peerURLs=http://172.62.0.12:2380 clientURLs=http://172.62.0.12:2379 isLeader=true
cdee7114ad135065: name=etcd-node2 peerURLs=http://172.62.0.11:2380 clientURLs=http://172.62.0.11:2379 isLeader=false
[root@k8s-node1 etcd-cluster]# docker exec -it etcd-node3 /bin/sh
/ # etcdctl member list
8cef47d732d4acff: name=etcd-node1 peerURLs=http://172.62.0.10:2380 clientURLs=http://172.62.0.10:2379 isLeader=false
c93af917b643516f: name=etcd-node3 peerURLs=http://172.62.0.12:2380 clientURLs=http://172.62.0.12:2379 isLeader=true
cdee7114ad135065: name=etcd-node2 peerURLs=http://172.62.0.11:2380 clientURLs=http://172.62.0.11:2379 isLeader=false
k/v操作
CURL
新增
[root@k8s-node1 etcd-cluster]# docker-compose -f etcd-cluster-compose.yml ps -a
Name Command State Ports
------------------------------------------------------------------------------------------------------
etcd-node1 etcd --name etcd-node1 --d ... Up 0.0.0.0:12379->2379/tcp, 0.0.0.0:12380->2380/tcp
etcd-node2 etcd --name etcd-node2 --d ... Up 0.0.0.0:22379->2379/tcp, 0.0.0.0:22380->2380/tcp
etcd-node3 etcd --name etcd-node3 --d ... Up 0.0.0.0:32379->2379/tcp, 0.0.0.0:32380->2380/tcp
[root@k8s-node1 etcd-cluster]# curl -L http://127.0.0.1:12379/version
{"etcdserver":"3.3.1","etcdcluster":"3.3.0"}[root@k8s-node1 etcd-cluster]#
[root@k8s-node1 etcd-cluster]# curl -L http://127.0.0.1:12379/v2/keys/Alexclownfish -X PUT -d value=https://blog.alexcld.com
{"action":"set","node":{"key":"/Alexclownfish","value":"https://blog.alexcld.com","modifiedIndex":19,"createdIndex":19}}
查询
[root@k8s-node1 etcd-cluster]# curl -L http://127.0.0.1:12379/v2/keys/Alexclownfish -X GET
{"action":"get","node":{"key":"/Alexclownfish","value":"https://blog.alexcld.com","modifiedIndex":19,"createdIndex":19}}
[root@k8s-node1 etcd-cluster]# curl -L http://127.0.0.1:22379/v2/keys/Alexclownfish -X GET
{"action":"get","node":{"key":"/Alexclownfish","value":"https://blog.alexcld.com","modifiedIndex":19,"createdIndex":19}}
[root@k8s-node1 etcd-cluster]# curl -L http://127.0.0.1:32379/v2/keys/Alexclownfish -X GET
{"action":"get","node":{"key":"/Alexclownfish","value":"https://blog.alexcld.com","modifiedIndex":19,"createdIndex":19}}
修改
同新建一样
删除
[root@k8s-node1 etcd-cluster]# curl -L http://127.0.0.1:12379/v2/keys/Alexclownfish -X DELETE
{"action":"delete","node":{"key":"/Alexclownfish","modifiedIndex":20,"createdIndex":19},"prevNode":{"key":"/Alexclownfish","value":"https://blog.alexcld.com","modifiedIndex":19,"createdIndex":19}}
[root@k8s-node1 etcd-cluster]# curl -L http://127.0.0.1:12379/v2/keys/Alexclownfish -X GET
{"errorCode":100,"message":"Key not found","cause":"/Alexclownfish","index":20}etcdctl
新增
/ # etcdctl set clownfish 1234567
1234567
/ # etcdctl get clownfish
1234567查询
/ # etcdctl get clownfish
1234567修改
/ # etcdctl get clownfish
1234567
/ # etcdctl set clownfish 987654321ddd
987654321ddd
/ # etcdctl get clownfish
987654321ddd删除
/ # etcdctl rm clownfish
PrevNode.Value: 987654321ddd
/ # etcdctl get clownfish
Error: 100: Key not found (/clownfish) [23]总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持编程网。
