主机配置
A 45.77.250.9 CentOS 7 x64
B 66.42.55.131 CentOS 7 x64
1.A、B主机分别安装docker
yum install docker -y
A、B主机分别启动docker
systemctl start docker
检查docker安装成功
docker version
2.A主机安装consul
wget https://releases.hashicorp.com/consul/0.9.2/consul_0.9.2_linux_386.zip
解压
unzip consul_0.9.2_linux_386.zip
然后执行
mv consul /usr/bin
chmod +x /usr/bin/consul
启动consul
nohup consul agent -server -ui -bootstrap -data-dir /data/docker/consul -client=45.77.250.9 -bind=45.77.250.9 >> /var/log/consul.log 2>&1 &
3.A、B主机分别配置docker连接consul
A、B主机分别执行
mkdir -p /etc/systemd/system/docker.service.d
vi /etc/systemd/system/docker.service.d/env.conf
A主机编辑文件env.conf内容如下
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock --cluster-store consul://45.77.250.9:8500 --cluster-advertise 45.77.250.9:2375
B主机编辑文件env.conf内容如下
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock --cluster-store consul://45.77.250.9:8500 --cluster-advertise 66.42.55.131:2375
重启docker
systemctl daemon-reload
systemctl restart docker
访问http://45.77.250.9:8500/ui/#/dc1/kv/docker/nodes/
4.A主机创建overlay网络
docker network create -d overlay overlay_2
查看网络创建成功
docker network ls
B主机查看overlay网络已同步到B主机
docker network ls
5.A、B主机分别导入镜像
cat ubuntu-16.04-x86_64.tar.gz | docker import - myubuntu
A主机创建运行容器ubuntu_1
docker run -itd --net overlay_2 --name ubuntu_1 myubuntu bash
B主机创建运行容器ubuntu_2
docker run -itd --net overlay_2 --name ubuntu_2 myubuntu bash
创建运行容器报错/usr/bin/docker-current: Error response from daemon: shim error: docker-runc not installed on system解决
执行
cp /usr/libexec/docker/docker-runc-current /usr/libexec/docker/docker-runc
docker rm -f $(docker ps -aq)
A主机查看容器ubuntu_1 IP 这里是10.0.0.2
docker inspect --format="{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}" ubuntu_1
B主机查看容器ubuntu_2 IP 这里是10.0.0.3
docker inspect --format="{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}" ubuntu_2
A主机进入ubuntu_1容器
docker exec -it ubuntu_1 bash
然后ping B主机ubuntu_2容器
ping 10.0.0.3
B主机进入ubuntu_2容器
docker exec -it ubuntu_2 bash
然后ping A主机ubuntu_1容器
ping 10.0.0.2