docker1.12.0 swarm集群
测试环境:Manager:
192.168.209.129Docker_Node1
Node:
192.168.209.130Docker_Node2
系统及软件:centos 7.2docker 1.12.0
1.初始化swarm集群
# docker swarm init
还可以用参数:
--listen-addr指定监听(格式: <ip|interface>[:port]) (默认:0.0.0.0:2377)
--advertise-addr 指定通告网卡(格式: <ip|interface>[:port])
执行后返回信息中包括两个命令,分别是加入node和加入manager
2.把Docker_Node2加入集群,根据提示的命令
# docker swarm join --token \
SWMTKN-1-1toyv27479tfrruwqj14l7dc6gsju4w4u8957wikn59kjlqqdu-dj71uypb64ckw0wylvq7svmzw\
192.168.209.129:2377
执行完成后收到This node joined a swarm as a worker.
# docker swarm --help
Commands:
init Initialize a swarm
join Join a swarm as a node and/or manager
join-tokenManage join tokens
update Update the swarm
leave Leave a swarm
3.查看集群状态信息
Manager:
# docker info
Swarm: active
NodeID: awsh1ay3dvghh9kuuoipbnanj
Is Manager: true
ClusterID: eelrml6monrirrlp1qzou45nb
Managers: 1
Nodes: 2
Orchestration:
Task History Retention Limit: 5
Raft:
Snapshot interval: 10000
Heartbeat tick: 1
Election tick: 3
Dispatcher:
Heartbeat period: 5 seconds
CA configuration:
Expiry duration: 3 months
Node Address: 192.168.209.129
Node:
# docker info
Swarm: active
NodeID: 6tm7yidwzw69c8byp5rtoeqel
Is Manager: false
Node Address: 192.168.209.130
查看node 信息
# docker node ls
ID HOSTNAME STATUSAVAILABILITYMANAGER STATUS
6tm7yidwzw69c8byp5rtoeqel Docker-Node2Ready Active
awsh1ay3dvghh9kuuoipbnanj *Docker-Node1Ready Active Leader
还可以用inspect查看详细信息
# docker node inspect 6tm7yidwzw69c8byp5rtoeqel
# docker node --help
Commands:
demote Demote a node from manager in the swarm
inspect Display detailed information on one or more nodes
ls List nodes in the swarm
promote Promote a node to a manager in the swarm
rm Remove a node from the swarm
ps List tasks running on a node
update Update a node
Docker service
1.创建nginx服务
# docker service create --name web --publish 80:80 --replicas 2 nginx
6x1ymmvsugcxtib6sjyjat4yd
注:
docker service create 创建service命令
--name 名称
--publish 指定对外提供服务端口
--replicas 运行容器数量
nginx 镜像名称
2.查看创建的service
# docker service ls
查看运行状态,这里看到分别在Docker-Node1、Docker-Node2各运行一个容器
# docker serviceps web
3.在线扩容,web的容器数量改成5
# docker service scale web=5
web scaled to 5
4.在线缩减
# docker service scale web=3
web scaled to 3
# docker service --help
Commands:
create Create a new service
inspect Display detailed information on one or more services
ps List the tasks of a service
ls List services
rm Remove a service
scale Scale one or multiple services
update Update a service
参考:https://docs.docker.com/engine/swarm/
页:
[1]