都部署完成后，检查etcd集群状态：
# /opt/etcd/bin/etcdctl \ --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem \ --endpoints="https://192.168.31.63:2379,https://192.168.31.65:2379,https://192.168.31.66:2379" \ cluster-health member 18218cfabd4e0dea is healthy: got healthy result from https://192.168.31.63:2379 member 541c1c40994c939b is healthy: got healthy result from https://192.168.31.65:2379 member a342ea2798d20705 is healthy: got healthy result from https://192.168.31.66:2379 cluster is healthy如果输出上面信息，就说明集群部署成功。如果有问题第一步先看日志：/var/log/message 或 journalctl -u etcd
2. 在Node安装Docker # yum install -y yum-utils device-mapper-persistent-data lvm2 # yum-config-manager \ --add-repo \ https://download.docker.com/linux/centos/docker-ce.repo # yum install docker-ce -y # curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s # systemctl start docker # systemctl enable docker 3. 部署Flannel网络工作原理：
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：
# /opt/etcd/bin/etcdctl \ --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem \ --endpoints="https://192.168.31.63:2379,https://192.168.31.65:2379,https://192.168.31.66:2379" \ set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'以下部署步骤在规划的每个node节点都操作。
下载二进制包：
# wget https://github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar.gz # tar zxvf flannel-v0.9.1-linux-amd64.tar.gz # mv flanneld mk-docker-opts.sh /opt/kubernetes/bin配置Flannel：
# cat /opt/kubernetes/cfg/flanneld FLANNEL_OPTIONS="--etcd-endpoints=https://192.168.31.63:2379,https://192.168.31.65:2379,https://192.168.31.66:2379 -etcd-cafile=/opt/etcd/ssl/ca.pem -etcd-certfile=/opt/etcd/ssl/server.pem -etcd-keyfile=/opt/etcd/ssl/server-key.pem"systemd管理Flannel：
# cat /usr/lib/systemd/system/flanneld.service [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配置Docker启动指定子网段：
# cat /usr/lib/systemd/system/docker.service [Unit] Description=Docker Application Container Engine Documentation=https://docs.docker.com After=network-online.target firewalld.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重启flannel和docker：
# systemctl daemon-reload # systemctl start flanneld # systemctl enable flanneld # systemctl restart docker检查是否生效：
# ps -ef |grep docker root 20941 1 1 Jun28 ? 09:15:34 /usr/bin/dockerd --bip=172.17.34.1/24 --ip-masq=false --mtu=1450 # ip addr 3607: flannel.1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN link/ether 8a:2e:3d:09:dd:82 brd ff:ff:ff:ff:ff:ff inet 172.17.34.0/32 scope global flannel.1 valid_lft forever preferred_lft forever 3608: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UP link/ether 02:42:31:8f:d3:02 brd ff:ff:ff:ff:ff:ff inet 172.17.34.1/24 brd 172.17.34.255 scope global docker0 valid_lft forever preferred_lft forever inet6 fe80::42:31ff:fe8f:d302/64 scope link valid_lft forever preferred_lft forever