Example playbook:

ansible-playbook -i inventory.ini deploy.yml -vv

ansible-deploy-etcd-cluster

集群大小	最大容错
1	0
3	1
5	2
7	3
9	4

etcd 集群的搭建有三种方式：

• static 方式
• etcd discovery
• DNS discovery

name	ip
etcd1	172.16.3.111
etcd2	172.16.3.112
etcd3	172.16.3.113

static 方式

172.16.3.111：

$ etcd --name etcd1 --data-dir /vpants/etcd/data --initial-advertise-peer-urls http://172.16.3.111:2380
--listen-peer-urls http://172.16.3.111:2380
--listen-client-urls http://172.16.3.111:2379,http://127.0.0.1:2379
--advertise-client-urls http://172.16.3.111:2379
--initial-cluster-token etcd-cluster-1
--initial-cluster etcd1=http://172.16.3.111:2380,etcd2=http://172.16.3.112:2380,etcd3=http://172.16.3.113:2380
--initial-cluster-state new

172.16.3.112:

$ etcd --name etcd2 --data-dir /vpants/etcd/data --initial-advertise-peer-urls http://172.16.3.112:2380
--listen-peer-urls http://172.16.3.112:2380
--listen-client-urls http://172.16.3.112:2379,http://127.0.0.1:2379
--advertise-client-urls http://172.16.3.112:2379
--initial-cluster-token etcd-cluster-1
--initial-cluster etcd1=http://172.16.3.111:2380,etcd2=http://172.16.3.112:2380,etcd3=http://172.16.3.113:2380
--initial-cluster-state new

172.16.3.113:

$ etcd --name etcd3 --data-dir /vpants/etcd/data --initial-advertise-peer-urls http://172.16.3.113:2380
--listen-peer-urls http://172.16.3.113:2380
--listen-client-urls http://172.16.3.113:2379,http://127.0.0.1:2379
--advertise-client-urls http://172.16.3.113:2379
--initial-cluster-token etcd-cluster-1
--initial-cluster etcd1=http://172.16.3.111:2380,etcd2=http://172.16.3.112:2380,etcd3=http://172.16.3.113:2380
--initial-cluster-state new

etcdctl

show cluster node

etcdctl member list

update cluster node

etcdctl member update id http://ip:2380

delete cluster node

etcdctl member reomve id

add cluster node

etcdctl member add name http://ip:2380

initial-cluster-state: existing