2017-12-03 13:57:02 +08:00
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## etcd 集群
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2017-12-03 18:53:35 +08:00
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下面我们使用 [Docker Compose](../compose/) 模拟启动一个 3 节点的 `etcd` 集群。
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2017-12-03 13:57:02 +08:00
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编辑 `docker-compose.yml` 文件
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```yaml
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2018-07-10 08:08:34 +08:00
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version: "3.6"
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2017-12-03 13:57:02 +08:00
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services:
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node1:
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image: quay.io/coreos/etcd
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volumes:
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- node1-data:/etcd-data
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expose:
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- 2379
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- 2380
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networks:
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cluster_net:
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ipv4_address: 172.16.238.100
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environment:
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- ETCDCTL_API=3
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command:
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- /usr/local/bin/etcd
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- --data-dir=/etcd-data
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- --name
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- node1
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- --initial-advertise-peer-urls
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- http://172.16.238.100:2380
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- --listen-peer-urls
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- http://0.0.0.0:2380
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- --advertise-client-urls
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- http://172.16.238.100:2379
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- --listen-client-urls
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- http://0.0.0.0:2379
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- --initial-cluster
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- node1=http://172.16.238.100:2380,node2=http://172.16.238.101:2380,node3=http://172.16.238.102:2380
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- --initial-cluster-state
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- new
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- --initial-cluster-token
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- docker-etcd
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node2:
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image: quay.io/coreos/etcd
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volumes:
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- node2-data:/etcd-data
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networks:
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cluster_net:
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ipv4_address: 172.16.238.101
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environment:
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- ETCDCTL_API=3
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expose:
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- 2379
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- 2380
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command:
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- /usr/local/bin/etcd
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- --data-dir=/etcd-data
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- --name
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- node2
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- --initial-advertise-peer-urls
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- http://172.16.238.101:2380
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- --listen-peer-urls
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- http://0.0.0.0:2380
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- --advertise-client-urls
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- http://172.16.238.101:2379
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- --listen-client-urls
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- http://0.0.0.0:2379
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- --initial-cluster
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- node1=http://172.16.238.100:2380,node2=http://172.16.238.101:2380,node3=http://172.16.238.102:2380
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- --initial-cluster-state
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- new
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- --initial-cluster-token
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- docker-etcd
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node3:
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image: quay.io/coreos/etcd
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volumes:
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- node3-data:/etcd-data
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networks:
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cluster_net:
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ipv4_address: 172.16.238.102
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environment:
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- ETCDCTL_API=3
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expose:
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- 2379
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- 2380
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command:
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- /usr/local/bin/etcd
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- --data-dir=/etcd-data
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- --name
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- node3
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- --initial-advertise-peer-urls
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- http://172.16.238.102:2380
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- --listen-peer-urls
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- http://0.0.0.0:2380
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- --advertise-client-urls
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- http://172.16.238.102:2379
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- --listen-client-urls
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- http://0.0.0.0:2379
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- --initial-cluster
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- node1=http://172.16.238.100:2380,node2=http://172.16.238.101:2380,node3=http://172.16.238.102:2380
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- --initial-cluster-state
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- new
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- --initial-cluster-token
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- docker-etcd
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volumes:
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node1-data:
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node2-data:
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node3-data:
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networks:
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cluster_net:
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driver: bridge
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ipam:
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driver: default
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config:
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-
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subnet: 172.16.238.0/24
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```
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2017-12-03 18:53:35 +08:00
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使用 `docker-compose up` 启动集群之后使用 `docker exec` 命令登录到任一节点测试 `etcd` 集群。
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2017-12-03 13:57:02 +08:00
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```bash
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/ # etcdctl member list
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daf3fd52e3583ff, started, node3, http://172.16.238.102:2380, http://172.16.238.102:2379
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422a74f03b622fef, started, node1, http://172.16.238.100:2380, http://172.16.238.100:2379
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ed635d2a2dbef43d, started, node2, http://172.16.238.101:2380, http://172.16.238.101:2379
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```
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