安装cni网络插件-非必须

安装cni网络插件

安装cni
# 安装 cni
# 百度云链接：https://pan.baidu.com/s/1-PputObLs5jouXLnuBCI6Q 密码：tzqm
cd /server/software/k8s
wget https://github.com/containernetworking/plugins/releases/download/v0.7.1/cni-plugins-amd64-v0.7.1.tgz
mkdir -pv /opt/cni/bin
tar xf cni-plugins-amd64-v0.7.1.tgz -C /opt/cni/bin
ls -l /opt/cni/bin
cd $HOME

vi /etc/cni/net.d/-mynet.conf

{
    "cniVersion": "0.7.0",
    "name": "mynet",
    "type": "bridge",
    "bridge": "cni0",
    "isGateway": true,
    "ipMasq": true,
    "ipam": {
        "type": "host-local",
        "subnet": "172.30.0.0/16",
        "routes": [
            { "dst": "0.0.0.0/0" }
        ]
    }
}

cat >/etc/cni/net.d/-loopback.conf <<EOF
{
    "cniVersion": "0.6.0",
    "name": "lo",
    "type": "loopback"
}
EOF

获取subnet：

etcdctl \
  --endpoints=${ETCD_ENDPOINTS} \
  --ca-file=/etc/kubernetes/cert/ca.pem \
  --cert-file=/etc/flanneld/cert/flanneld.pem \
  --key-file=/etc/flanneld/cert/flanneld-key.pem \
  ls ${FLANNEL_ETCD_PREFIX}/subnets

/kubernetes/network/subnets/172.30.43.0-
/kubernetes/network/subnets/172.30.49.0-
/kubernetes/network/subnets/172.30.30.0-
/kubernetes/network/subnets/172.30.44.0-

echo  > /sys/devices/virtual/net/docker0/bridge/nf_call_iptables

插件必须设置net/bridge/bridge-nf-call-iptables sysctl为1，以确保iptables代理功能正常。

参照地址： k8s这区文档：   https://k8smeetup.github.io/docs/concepts/cluster-administration/network-plugins/