Docker Swarm及界面管理软件Portainer安装

ASP站长网Docker swarm是集群下docker容器编排工具，本文讲解了安装swarm的步骤和swarm界面管理工具Portainer的安装。
 
本文使用的操作是CentOS7；三台主机，一台作为管理节点，另外两台作为工作节点。
 
1.安装swarm
编辑三台机器的/etc/hosts文件，内容修改为： 192.168.1.130    manager.wisely.com  manager
192.168.1.131    node1.wisely.com    node1
192.168.1.132    node2.wisely.com    node2
 
每台机器安装docker，顺序执行下面命令 yum update -y
yum install docker
systemctl start docker
systemctl enable docker
 
每台机器开放下面防火墙端口，顺序执行下面命令： firewall-cmd --permanent --add-port=2376/tcp
firewall-cmd --permanent --add-port=2377/tcp
firewall-cmd --permanent --add-port=7946/tcp
firewall-cmd --permanent --add-port=7946/udp
firewall-cmd --permanent --add-port=4789/udp
firewall-cmd --permanent --add-port=80/tcp
firewall-cmd --reload
systemctl restart docker
 
在manager节点初始化集群： docker swarm init --advertise-addr 192.168.1.130
 
执行后，得到下面结果：
Swarm initialized: current node (b0389cuqtk1h2v5vhj3a3xurz) is now a manager.
 
To add a worker to this swarm, run the following command:
 
  docker swarm join \
  --token SWMTKN-1-2xinda2i8kc8is6eob7hhyqyntxal1688ixzep2dqpmkyktnio-4xub9o40ilq326yi6b0hnjx9f \
  192.168.1.130:2377
 
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
 
在另外两个工作节点执行： docker swarm join \
  --token SWMTKN-1-2xinda2i8kc8is6eob7hhyqyntxal1688ixzep2dqpmkyktnio-4xub9o40ilq326yi6b0hnjx9f \
  192.168.1.130:2377
 
输出为：
[root@localhost ~]# docker swarm join \
>    --token SWMTKN-1-2xinda2i8kc8is6eob7hhyqyntxal1688ixzep2dqpmkyktnio-4xub9o40ilq326yi6b0hnjx9f \
>    192.168.1.130:2377
This node joined a swarm as a worker.
 
执行docker node ls查看集群信息: ID                          HOSTNAME            STATUS  AVAILABILITY  MANAGER STATUS
0bd7q219yihhkrlbj2prhlmxu    node1.wisely.com    Ready  Active       
0qm0up69sjld7rwofso506oml    node2.wisely.com    Ready  Active       
b0389cuqtk1h2v5vhj3a3xurz *  manager.wisely.com  Ready  Active        Leader
 
使用阿里云docker镜像加速，按顺序执行，请去阿里云申请： sudo mkdir -p /etc/docker
 
sudo tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["https://*.mirror.aliyuncs.com"]
}
EOF
 
sudo systemctl daemon-reload
 
sudo systemctl restart docker
 
部署测试，在管理节点执行： docker service create -p 80:80 --name webserver --replicas 5 httpd
 
查看集群中的servicedocker service ls：
ID            NAME      REPLICAS  IMAGE  COMMAND
7wk5kekwkyjd  webserver  5/5      httpd
 
查看集群中的webserver服务docker service ps webserver:
ID                        NAME        IMAGE  NODE                DESIRED STATE  CURRENT STATE            ERROR
5jq6c649y7kfdofhc8t4od7jc  webserver.1  httpd  node1.wisely.com    Running        Preparing 38 seconds ago
80ijfnq17p2h8dvipaabq3j4l  webserver.2  httpd  node1.wisely.com    Running        Preparing 38 seconds ago
94yrknng8y9e4h9l80ractm2r  webserver.3  httpd  manager.wisely.com  Running        Preparing 38 seconds ago
3ctowh4uctuh8q5u7lr930e9p  webserver.4  httpd  node2.wisely.com    Running        Preparing 38 seconds ago
du0eoe5nn9dpcvqik0z4m2ros  webserver.5  httpd  node2.wisely.com    Running        Preparing 38 seconds ago
 
访问http://192.168.1.130、http://192.168.1.131或http://192.168.1.132，结果为：
 
 
 
2.安装Portainer
 
首先关闭selinux，setenforce 0
 
在manager节点执行：
docker service create \
--name portainer \
--publish 9000:9000 \
--constraint 'node.role == manager' \
--mount type=bind,src=/var/run/docker.sock,dst=/var/run/docker.sock \
portainer/portainer \
-H unix:///var/run/docker.sock
 
​访问http://192.168.1.130:9000