本文来自我的github pages博客http://galengao.github.io/ 即www.gaohuirong.cn
摘要:
- swarm是docker原生的集群管理软件，与kubernetes比起来比较简单
1、部署
系统时centos7上
关闭防火墙 systemctl stop firewalld.service
关闭selinux vi /etc/selinux/comfig
192.168.10.140 swarm manager
192.168.10.141 swarm node
192.168.10.142 swarm mode
2、分别在manager节点和node节点上安装docker
安装方式参照我的另一篇文章docker安装http://galengao.github.io/docker/2016/06/03/mydocker-use.html
yum update tee /etc/yum.repos.d/docker.repo<<EOF
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/7/
enabled=
gpgcheck=
gpgkey=https://yum.dockerproject.org/gpg
EOF yum install docker-engine
3、分别在manager节点和node节点上配置docker
vi /lib/systemd/system/docker.service
# 修改ExecStart项为如下：
ExecStart=/usr/bin/docker daemon -H 0.0.0.0: -H unix:///var/run/docker.sock
# 重新载入配置，使修改生效。
systemctl daemon-reload
# 重启docker。
systemctl restart docker
4、在manager节点和node节点上push swarm镜像
[root@swarm1 ~]# docker pull swarm
Using default tag: latest
latest: Pulling from library/swarm
1e61bbec5d24: Pull complete
8c7b2f6b74da: Pull complete
245a8db4f1e1: Pull complete
Digest: sha256:661f2e4c9470e7f6238cebf603bcf5700c8b948894ac9e35f2cf6f63dcda723a
Status: Downloaded newer image for swarm:latest
5、创建集群token，获取全球唯一的 token，作为集群唯一标识
# 在任何节点都可以，但是要记住该值，以后要用到
[root@swarm1 ~]# docker run --rm swarm create
eca9b4ab85feb53f8a9676c72dd01b1a
6、加入集群
# 在manager也就是节点node1
[root@swarm1 ~]# docker run -d swarm join -addr=192.168.10.140: token://eca9b4ab85feb53f8a9676c72dd01b1a
109da11914295c588c6afe5f83ab731bd0d0012897c39c311de89534e2f5bc13
# node2上
[root@swarm1 ~]# docker run -d swarm join -addr=192.168.10.141: token://eca9b4ab85feb53f8a9676c72dd01b1a
1da02eb6a00a8860eefe965a0aded446aebff8b502962c717dd3f494b546841a
# node3上
[root@swarm1 ~]# docker run -d swarm join -addr=192.168.10.142: token://eca9b4ab85feb53f8a9676c72dd01b1a
b5483c91bff0ad21e19700af51990d631e991f9d67188c7419f147652d494972
7、启动管理机
# 在管理机上执行:
[root@swarm1 ~]# docker run -d -p : swarm manage token://eca9b4ab85feb53f8a9676c72dd01b1a
3073a3dd59a5782f706d6481cfd1a36e8090f21764dfec2532899450bd719456
8、查看节点信息
# 本机上查看节点信息
[root@swarm1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1da02eb6a00a swarm "/swarm join -addr=19" minutes ago Up minutes /tcp sick_bose
# 查看集群所有节点信息，在任何一台机器上执行
[root@swarm1 ~]# docker run --rm swarm list token://eca9b4ab85feb53f8a9676c72dd01b1a
192.168.10.142:
192.168.10.141:
192.168.10.140:
# 查看集群详细信息。在任何一台机器上执行:
# 该IP地址是manager的地址
[root@swarm1 ~]# docker -H 192.168.10.140: info
Containers:
Running:
Paused:
Stopped:
Images:
Server Version: swarm/1.2.
Role: primary
Strategy: spread
Filters: health, port, containerslots, dependency, affinity, constraint
Nodes:
(unknown): 192.168.10.142:
└ ID:
└ Status: Pending
└ Containers:
└ Reserved CPUs: /
└ Reserved Memory: B / B
└ Labels:
└ UpdatedAt: --28T07::39Z
└ ServerVersion:
(unknown): 192.168.10.141:
└ ID:
└ Status: Pending
└ Containers:
└ Reserved CPUs: /
└ Reserved Memory: B / B
└ Labels:
└ UpdatedAt: --28T07::39Z
└ ServerVersion:
(unknown): 192.168.10.140:
└ ID:
└ Status: Pending
└ Containers:
└ Reserved CPUs: /
└ Reserved Memory: B / B
└ Labels:
└ UpdatedAt: --28T07::39Z
└ ServerVersion:
Plugins:
Volume:
Network:
Kernel Version: 3.10.-.el7.x86_64
Operating System: linux
Architecture: amd64
CPUs:
Total Memory: B
Name: 3073a3dd59a5
Docker Root Dir:
Debug mode (client): false
Debug mode (server): false
WARNING: No kernel memory limit support