Docker容器跨主機通訊--overlay
阿新 • • 發佈:2019-01-05
主機配置
A 45.77.250.9 CentOS 7 x64
B 66.42.55.131 CentOS 7 x64
1.A、B主機分別安裝docker
yum install docker -y
A、B主機分別啟動docker
systemctl start docker
檢查docker安裝成功
docker version
2.A主機安裝consul
wget https://releases.hashicorp.com/consul/0.9.2/consul_0.9.2_linux_386.zip
解壓
unzip consul_0.9.2_linux_386.zip
然後執行
mv consul /usr/bin
chmod +x /usr/bin/consul
啟動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主機分別配置docker連線consul
A、B主機分別執行
mkdir -p /etc/systemd/system/docker.service.d vi /etc/systemd/system/docker.service.d/env.conf
A主機編輯檔案env.conf內容如下
[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主機編輯檔案env.conf內容如下
[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
重啟docker
systemctl daemon-reload
systemctl restart docker
訪問http://45.77.250.9:8500/ui/#/dc1/kv/docker/nodes/
4.A主機建立overlay網路
docker network create -d overlay overlay_2
檢視網路建立成功
docker network ls
B主機檢視overlay網路已同步到B主機
docker network ls
5.A、B主機分別匯入映象
cat ubuntu-16.04-x86_64.tar.gz | docker import - myubuntu
A主機建立執行容器ubuntu_1
docker run -itd --net overlay_2 --name ubuntu_1 myubuntu bash
B主機建立執行容器ubuntu_2
docker run -itd --net overlay_2 --name ubuntu_2 myubuntu bash
建立執行容器報錯/usr/bin/docker-current: Error response from daemon: shim error: docker-runc not installed on system解決
執行
cp /usr/libexec/docker/docker-runc-current /usr/libexec/docker/docker-runc
docker rm -f $(docker ps -aq)
A主機檢視容器ubuntu_1 IP 這裡是10.0.0.2
docker inspect --format="{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}" ubuntu_1
B主機檢視容器ubuntu_2 IP 這裡是10.0.0.3
docker inspect --format="{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}" ubuntu_2
A主機進入ubuntu_1容器
docker exec -it ubuntu_1 bash
然後ping B主機ubuntu_2容器
ping 10.0.0.3
B主機進入ubuntu_2容器
docker exec -it ubuntu_2 bash
然後ping A主機ubuntu_1容器
ping 10.0.0.2