Centos7部署Flannel网络(八)

 
 1、为Flannel生成证书 

  [root@linux-node1 ssl]# vim flanneld-csr.json 

{

  "CN": "flanneld", 

  "hosts": [], 

  "key": { 

  "algo": "rsa", 

  "size": 2048 

},

  "names": [ 

{

  "C": "CN", 

  "ST": "BeiJing", 

  "L": "BeiJing", 

  "O": "k8s", 

  "OU": "System" 

}

]

}

 
 2、生成证书 

  [root@linux-node1 ssl]# cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem \ 

  > -ca-key=/opt/kubernetes/ssl/ca-key.pem \ 

  > -config=/opt/kubernetes/ssl/ca-config.json \ 

  > -profile=kubernetes flanneld-csr.json | cfssljson -bare flanneld 

 
 3、分发证书 

  [root@linux-node1 ssl]# cp flanneld*.pem /opt/kubernetes/ssl/ 

  [root@linux-node1 ssl]# scp flanneld*.pem 192.168.43.22:/opt/kubernetes/ssl/ 

  [root@linux-node1 ssl]# scp flanneld*.pem 192.168.43.23:/opt/kubernetes/ssl/ 

 
 4、下载Flannel软件包 

  [root@linux-node1 src]# wget https://github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar.gz 

  [root@linux-node1 src]# tar -zxvf flannel-v0.10.0-linux-amd64.tar.gz 

  [root@linux-node1 src]# cp flanneld mk-docker-opts.sh /opt/kubernetes/bin/ 

  [root@linux-node1 src]# scp flanneld mk-docker-opts.sh 192.168.43.22:/opt/kubernetes/bin/ 

  [root@linux-node1 src]# scp flanneld mk-docker-opts.sh 192.168.43.23:/opt/kubernetes/bin/ 

  [root@linux-node1 src]# cd /usr/local/src/kubernetes/cluster/centos/node/bin/ 

  [root@linux-node1 bin]# cp remove-docker0.sh /opt/kubernetes/bin/ 

  [root@linux-node1 bin]# scp remove-docker0.sh 192.168.43.22:/opt/kubernetes/bin/ 

  [root@linux-node1 bin]# scp remove-docker0.sh 192.168.43.23:/opt/kubernetes/bin/ 

 
 5、配置Flannel 

  [root@linux-node1 ~]# vim /opt/kubernetes/cfg/flannel 

  FLANNEL_ETCD="-etcd-endpoints=https://192.168.43.21:2379,https://192.168.43.22:2379,https://192.168.43.23:2379" 

  FLANNEL_ETCD_KEY="-etcd-prefix=/kubernetes/network" 

  FLANNEL_ETCD_CAFILE="--etcd-cafile=/opt/kubernetes/ssl/ca.pem" 

  FLANNEL_ETCD_CERTFILE="--etcd-certfile=/opt/kubernetes/ssl/flanneld.pem" 

  FLANNEL_ETCD_KEYFILE="--etcd-keyfile=/opt/kubernetes/ssl/flanneld-key.pem" 

  [root@linux-node1 ~]# scp /opt/kubernetes/cfg/flannel 192.168.43.22:/opt/kubernetes/cfg/ 

  [root@linux-node1 ~]# scp /opt/kubernetes/cfg/flannel 192.168.43.23:/opt/kubernetes/cfg/ 

 
 6、设置Flannel系统服务 

  [root@linux-node1 ~]# vim /usr/lib/systemd/system/flannel.service 

  [Unit] 

  Description=Flanneld overlay address etcd agent 

  After=network.target 

  Before=docker.service 

  [Service] 

  EnvironmentFile=-/opt/kubernetes/cfg/flannel 

  ExecStartPre=/opt/kubernetes/bin/remove-docker0.sh 

  ExecStart=/opt/kubernetes/bin/flanneld ${FLANNEL_ETCD} ${FLANNEL_ETCD_KEY} ${FLANNEL_ETCD_CAFILE} ${FLANNEL_ETCD_CERTFILE} ${FLANNEL_ETCD_KEYFILE} 

  ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -d /run/flannel/docker 

  Type=notify 

  [Install] 

  WantedBy=multi-user.target 

  RequiredBy=docker.service 

  [root@linux-node1 ~]# scp /usr/lib/systemd/system/flannel.service 192.168.43.22:/usr/lib/systemd/system/ 

  [root@linux-node1 ~]# scp /usr/lib/systemd/system/flannel.service 192.168.43.23:/usr/lib/systemd/system/ 

 
 7、Flannel CNI集成 

  下载CNI插件 

  [root@linux-node1 ~]# wget 
 https://github.com/containernetworking/plugins/releases/download/v0.7.1/cni-plugins-amd64-v0.7.1.tgz 

  [root@linux-node1 src]# mkdir /opt/kubernetes/bin/cni 

  [root@linux-node2 src]# mkdir /opt/kubernetes/bin/cni 

  [root@linux-node3 src]# mkdir /opt/kubernetes/bin/cni 

  [root@linux-node1 src]# tar zxf cni-plugins-amd64-v0.7.1.tgz -C /opt/kubernetes/bin/cni 

  [root@linux-node1 src]# scp -r /opt/kubernetes/bin/cni/* 192.168.43.22:/opt/kubernetes/bin/cni/ 

  [root@linux-node1 src]# scp -r /opt/kubernetes/bin/cni/* 192.168.43.23:/opt/kubernetes/bin/cni/ 

 
 8、创建etcd的key 

  [root@linux-node1 src]# /opt/kubernetes/bin/etcdctl --ca-file /opt/kubernetes/ssl/ca.pem --cert-file /opt/kubernetes/ssl/flanneld.pem --key-file /opt/kubernetes/ssl/flanneld-key.pem \ 

  > --no-sync -C https://192.168.43.21:2379,https://192.168.43.22:2379,https://192.168.43.23:2379 \ 

  > mk /kubernetes/network/config '{ "Network": "10.2.0.0/16", "Backend": { "Type": "vxlan", "VNI": 1 }}' >/dev/null 2>&1 

 
 9、启动flannel(三个节点都执行) 

  # systemctl daemon-reload 

  # systemctl enable flannel 

  # chmod +x /opt/kubernetes/bin/* 

  # systemctl start flannel 

 
 10、配置Docker使用Flannel 

  [root@linux-node1 src]# vim /usr/lib/systemd/system/docker.service 

  [Unit] #在Unit下面修改After和增加Requires 

  After=network-online.target firewalld.service flannel.service 

  Wants=network-online.target 

  Requires=flannel.service 

  [Service] #增加EnvironmentFile=-/run/flannel/docker 

  Type=notify 

  EnvironmentFile=-/run/flannel/docker 

  ExecStart=/usr/bin/dockerd $DOCKER_OPTS 

  [root@linux-node1 src]# scp /usr/lib/systemd/system/docker.service 192.168.43.22:/usr/lib/systemd/system/ 

  [root@linux-node1 src]# scp /usr/lib/systemd/system/docker.service 192.168.43.23:/usr/lib/systemd/system/ 

 
 11、重启docker三台节点执行同一操作 

  # systemctl daemon-reload 

  # systemctl restart docker 

Centos7部署Flannel网络(八)

猜你喜欢