部署Flannel网络
部署Flannel网络
部署flannel网络需要执行以下步骤：
1）写入分配的子网段到etcd，供flanneld使用
2）下载二进制包
3）配置Flannel
4）systemd管理Flannel
5）配置Docker启动指定子网段
6）启动
第一步：下载flannel二进制包
wget https://github.com/coreos/flannel/releases/download/v0.9.1/flannel-v0.9.1-linux-amd64.tar.gz
第二步：解压flannel二进制包并且复制到其他节点
//解压二进制文件
tar -zxvf flannel-v0.9.1-linux-amd64.tar.gz
//将可执行文件flanneld mk-docker-opts.sh复制发送到其他节点
scp flanneld mk-docker-opts.sh root@172.16.163.130:/opt/kubernetes/bin/
第三步：写入分配的子网段到etcd，供flanneld使用
/opt/kubernetes/bin/etcdctl \
--ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem \
--endpoints="https://172.16.163.131:2379,https://172.16.163.130:2379,https://172.16.163.129:2379" \
set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'
第四步：编写flanneld配置文件
NNEL_OPTIONS="--etcd-endpoints=https://172.16.163.131:2379,https://172.16.163.130:2379,https://172.16.163.129:2379 -etcd-cafile=/opt/kubernetes/ssl/ca.pem -etcd-certfile=/opt/kubernetes/ssl/server.pem -etcd-keyfile=/opt/kubernetes/ssl/server-key.pem"
第五步：编写flanneld.service配置文件
[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
第六步：docker.service配置文件
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service containerd.service
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/run/flannel/subnet.env
ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target
以上配置好了之后，需要将flanneld配置文件，flanneld.service文件，docker.service文件，复制到其他节点。
第七步：启动服务
systemctl daemon-reload
systemctl start flanneld
systemctl enable flanneld
systemctl restart docker
最后配置结果截图
