部署Flannel網絡

部署Flannel網絡

部署flannel網絡需要執行以下步驟：

1）寫入分配的子網段到etcd，供flanneld使用
2）下載二進制包
3）配置Flannel
4）systemd管理Flannel
5）配置Docker啟動指定子網段
6）啟動

第一步：下載flannel二進制包

wget https://github.com/coreos/flannel/releases/download/v0.9.1/flannel-v0.9.1-linux-amd64.tar.gz

第二步：解壓flannel二進制包並且復制到其他節點

//解壓二進制文件
tar -zxvf flannel-v0.9.1-linux-amd64.tar.gz 
//將可執行文件flanneld mk-docker-opts.sh復制發送到其他節點
scp flanneld mk-docker-opts.sh  root@172.16.163.130:/opt/kubernetes/bin/

第三步：寫入分配的子網段到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：編寫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：編寫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，需要將flanneld配置文件，flanneld.service文件，docker.service文件，復制到其他節點。

第七步：啟動服務

systemctl daemon-reload
systemctl start flanneld
systemctl enable flanneld
systemctl restart docker

最后配置結果截圖