K8s所有节点安装flannel网络
安装flannel
# 所有节点都需执行
yum install flannel -y
sed -i 's#FLANNEL_ETCD_ENDPOINTS="http://127.0.0.1:2379"#FLANNEL_ETCD_ENDPOINTS="http://10.0.0.21:2379"#g' /etc/sysconfig/flanneld
master节点配置key
etcdctl mk /atomic.io/network/config '{ "Network": "172.16.0.0/16" }'master节点安装docker
yum install docker -y
#为了安装Harbor，如果有更多服务器则单独一台用来安装Harbormaster节点重启服务
systemctl enable flanneld
systemctl restart flanneld
systemctl enable docker
systemctl daemon-reload
systemctl restart docker
systemctl restart kube-apiserver
systemctl restart kube-controller-manager
systemctl restart kube-scheduler
node节点重启服务
systemctl enable flanneld
systemctl restart flanneld
systemctl daemon-reload
systemctl restart docker
systemctl restart kubelet
systemctl restart kube-proxy
某些版本的docker安装后会修改IPTABLES的FORWARD链为DROP，导致docker间网络不通无法通信（进容器后相互PING Docker分配的虚拟IP），需要修改宿主机的IPTABLES的FORWARD链规则为ACCEPT（每个机器都要修改）
iptables -P FORWARD ACCEPT
一劳永逸修改方案：
vim /usr/lib/systemd/system/docker.service
ExecStart上方添加 ExecStartPost=/usr/sbin/iptables -P FORWARD ACCEPT
systemctl daemon-reload
systemctl restart docker
一键安装脚本
master
yum install flannel -y
#下方IP为etcd主节点IP（master节点IP）
sed -i 's#FLANNEL_ETCD_ENDPOINTS="http://127.0.0.1:2379"#FLANNEL_ETCD_ENDPOINTS="http://10.0.0.11:2379"#g' /etc/sysconfig/flanneld
etcdctl mk /atomic.io/network/config '{ "Network": "172.16.0.0/16" }'
yum install docker -y
#为了安装Harbor，如果有更多服务器则单独一台用来安装Harbor
systemctl enable flanneld
systemctl restart flanneld
systemctl enable docker
systemctl daemon-reload
systemctl restart docker
systemctl restart kube-apiserver
systemctl restart kube-controller-manager
systemctl restart kube-scheduler
node
# 所有节点都需执行
yum install flannel -y
sed -i 's#FLANNEL_ETCD_ENDPOINTS="http://127.0.0.1:2379"#FLANNEL_ETCD_ENDPOINTS="http://10.0.0.11:2379"#g' /etc/sysconfig/flanneld
systemctl enable flanneld
systemctl restart flanneld
systemctl daemon-reload
systemctl restart docker
systemctl restart kubelet
systemctl restart kube-proxy
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