docker swarm集群搭建及使用Portainer管理使用Docker Swarm环境

一、规划

1、swarm01作为manager节点，swarm02和swarm03作为worker节点。

 $cat /etc/hosts
172.18.144.188  node1   node1
172.18.144.191  node2
172.18.144.190  node3
172.18.144.189  node4

2、配置SSH免密登陆

这一步参考https://blog.csdn.net/zxf_668899/article/details/53927391#13-%E9%85%8D%E7%BD%AEssh%E5%85%8D%E5%AF%86%E7%A0%81%E7%99%BB%E5%BD%95
配置完成

二、安装docker和ansible

1、安装配置ansible

$ yum -y install ansible
$ cat /etc/ansible/hosts | grep -v ^# | grep -v ^$
[node]
172.18.144.188
172.18.144.191  
172.18.144.190 
172.18.144.189 
$ sed -i "s/SELINUX=enforcing/SELINUX=disabled" /etc/selinux/config
$ ansible node -m copy -a 'src=/etc/selinux/config dest=/etc/selinux/'
$ systemctl stop firewalld
$ systemctl disable firewalld
$ ansible node -a 'systemctl stop firewalld'
$ ansible node -a 'systemctl disable firewalld'

注:这里选择关闭防火墙，实际环境中可自行开放端口。

2、安装docker

• 在manager节点安装docker

$ yum install -y yum-utils device-mapper-persistent-data lvm2
$ yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
$ yum list docker-ce --showduplicates | sort -r
$ yum -y install docker-ce
$ docker --version
Docker version 18.05.0-ce, build f150324
$ systemctl start docker
$ systemctl status docker
$ systemctl enable docker

• 使用ansible在worker节点安装docker

$ ansible node -m copy -a 'src=/etc/yum.repos.d/docker-ce.repo dest=/etc/yum.repos.d/'
$ ansible node -m yum -a "state=present name=docker-ce"
$ ansible node -a 'docker --version'
172.18.144.191   | SUCCESS | rc=0 >>
Docker version 18.05.0-ce, build f150324
1172.18.144.190   | SUCCESS | rc=0 >>
Docker version 18.05.0-ce, build f150324
172.18.144.189   | SUCCESS | rc=0 >>
Docker version 18.05.0-ce, build f150324
$ ansible node -a 'systemctl start docker'
$ ansible node -a 'systemctl status docker'
$ ansible node -a 'systemctl enable docker'

三、配置docker swarm集群

1、创建docker swarm集群

$ docker swarm init --listen-addr 0.0.0.0
Swarm initialized: current node (a1tno675d14sm6bqlc512vf10) is now a manager.
To add a worker to this swarm, run the following command:
    docker swarm join --token SWMTKN-1-3sp9uxzokgr252u1jauoowv74930s7f8f5tsmm5mlk5oim359e-dk52k5uul50w49gbq4j1y7zzb 172.18.144.188:2377
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.

2、查看节点

$ docker node ls
ID                           HOSTNAME      STATUS      AVAILABILITY   MANAGER STATUS
a1tno675d14sm6bqlc512vf10 *  swarm01        Ready         Active           Leader

3、查看加入集群manager管理节点的命令

$ docker swarm join-token manager
To add a manager to this swarm, run the following command:
    docker swarm join --token SWMTKN-1-3sp9uxzokgr252u1jauoowv74930s7f8f5tsmm5mlk5oim359e-7tdlpdnkyfl1bnq34ftik9wxw 172.18.144.188:2377

4、查看加入集群worker节点的命令

$ docker swarm join-token worker
To add a worker to this swarm, run the following command:
    docker swarm join --token SWMTKN-1-3sp9uxzokgr252u1jauoowv74930s7f8f5tsmm5mlk5oim359e-dk52k5uul50w49gbq4j1y7zzb 172.18.144.188:2377

5、将前面规划的三个worker节点加入集群

$ docker swarm join --token SWMTKN-1-3sp9uxzokgr252u1jauoowv74930s7f8f5tsmm5mlk5oim359e-dk52k5uul50w49gbq4j1y7zzb 172.18.144.188:2377
This node joined a swarm as a worker.

6、查看worker节点是否已加入集群

$ docker node ls
ID                            HOSTNAME            STATUS              AVAILABILITY        MANAGER STATUS      ENGINE VERSION
mcc9hge72y8dhnxms6jwdqhrd *   node1               Ready               Active              Leader              18.05.0-ce
rc8xoueu78vp2lmyv9afd5wkf     node2               Ready               Active                                  18.05.0-ce
lu8qsmf31ubk9s77bawmsxzw2     node3               Ready               Active                                  18.05.0-ce
yl71cs8qs7s24yhvuwmdatfzp     node4               Ready               Active                                  18.05.0-ce

7、查看docker swarm的管理网络

$ docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
91e24f0c4c6b        bridge              bridge              local
6f6790a75aee        docker_gwbridge     bridge              local
8add841bce4f        host                host                local
jqzdbhspwicz        ingress             overlay             swarm
6e8c1ff220be        none                null                local
31e09aaeec48        redis-net           bridge              local

这里，一个docker swarm集群就搭建好了

四、搭建docker swarm的UI—Portainer

Portainer地址:https://portainer.io/

1、使用该命令部署Portainer

$ docker volume create portainer_data
$ docker service create \
--name portainer \
--publish 9000:9000 \
--replicas=1 \
--constraint 'node.role == manager' \
--mount type=bind,src=//var/run/docker.sock,dst=/var/run/docker.sock \
--mount type=volume,src=portainer_data,dst=/data \
portainer/portainer \
-H unix:///var/run/docker.sock
# docker images |grep portainer
portainer/portainer  latest  07cde96d4789   2 weeks ago  10.4MB
# docker service ls                    ###查看集群列表
ID              NAME        MODE     REPLICAS      IMAGE             PORTS
p5bo3n0fmqgz  portainer  replicated    1/1   portainer/portainer:latest   *:9000->9000/tcp

这就部署好了

2、浏览器输入http://localhost:9000进入该UI界面，如下所示，第一次进入Portainer，配置8位数的admin密码

密码修改完成后点击“validate”验证

如下图所示，输入admin用户名和密码进入Portainer

首页如下

image.png

查看swarm节点模块

image.png