在 node 节点上安装 docker
参考 https://www.cnblogs.com/klvchen/p/8468855.html
Flannel 工作原理:
部署 Flannel 网络
在 master 上执行
- # Falnnel 要用 etcd 存储自身一个子网信息, 所以要保证能成功连接 Etcd, 写入预定义子网段:
- cd /opt/etcd/ssl
- /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.0.205:2379,https://192.168.0.206:2379,https://192.168.0.207:2379" set /coreos.com/network/config '{"Network":"172.17.0.0/16","Backend": {"Type":"vxlan"}}'
下载 flannel-v0.10.0-Linux-amd64.tar.gz
- ansible node -m file -a 'path=/iba/tools state=directory'
- ansible node -m command -a 'wget -O /iba/tools/flannel-v0.10.0-linux-amd64.tar.gz https://github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar.gz'
- ansible node -m file -a 'path=/opt/kubernetes/bin state=directory'
- ansible node -m shell -a 'tar zxf /iba/tools/flannel-v0.10.0-linux-amd64.tar.gz -C /opt/kubernetes/bin/'
systemd 管理 Flannel
- mkdir /home/config && cd /home/config
- cat> flanneld.service <<-'EOF'
- [Unit]
- Description=Flanneld overlay address etcd agent
- After=network-online.target network.target
- Before=docker.service
- [Service]
- Type=notify
- EnvironmentFile=/opt/kubernetes/cfg/flanneld
- ExecStart=/opt/kubernetes/bin/flanneld --ip-masq $FLANNEL_OPTIONS
- ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
- Restart=on-failure
- [Install]
- WantedBy=multi-user.target
- EOF
- ansible node -m copy -a 'src=flanneld.service dest=/usr/lib/systemd/system/flanneld.service'
配置 Flannel
- ansible node -m file -a 'path=/opt/kubernetes/cfg state=directory'
- cat> flanneld << EOF
- FLANNEL_OPTIONS="--etcd-endpoints=https://192.168.0.205:2379,https://192.168.0.206:2379,https://192.168.0.207:2379 -etcd-cafile=/opt/etcd/ssl/ca.pem -etcd-certfile=/opt/etcd/ssl/server.pem -etcd-keyfile=/opt/etcd/ssl/server-key.pem"
- EOF
- ansible node -m copy -a 'src=flanneld dest=/opt/kubernetes/cfg/flanneld'
配置 Docker 启动指定子网段
- # 在 node 上执行
- vi /usr/lib/systemd/system/docker.service
- # 在 for containers run by docker 下面添加, 修改两行
- EnvironmentFile=/run/flannel/subnet.env
- ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H unix://
启动 ?annel 和 重启 docker
- # 在 master 上执行
- ansible node -m shell -a 'systemctl daemon-reload'
- ansible node -m shell -a 'systemctl start flanneld'
- ansible node -m shell -a 'systemctl status flanneld.service'
- ansible node -m shell -a 'systemctl restart docker'
检查 docker 有没有在指定的 ip 下启动
ansible node -m shell -a 'ps -ef|grep docker'
检查 docker0 与 flannel.1 在同一个网段
ansible node -m shell -a 'ip add'
来源: http://www.bubuko.com/infodetail-2930455.html