7、二进制安装K8s之部署kube-proxy

二进制安装K8s之部署kube-proxy

1、创建配置文件

cat > /data/k8s/config/kube-proxy.conf << EOF
KUBE_PROXY_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/data/k8s/logs \\
--config=/data/k8s/config/kube-proxy-config.yml"
EOF

2、配置参数文件

cat > /data/k8s/config/kube-proxy-config.yml << EOF
kind: KubeProxyConfiguration
apiVersion: kubeproxy.config.k8s.io/v1alpha1
address: 0.0.0.0
metricsBindAddress: 0.0.0.0:10249
clientConnection:
  kubeconfig: /data/k8s/config/kube-proxy.kubeconfig
hostnameOverride: k8s-master01
clusterCIDR: 10.0.0.0/24
EOF

• hostnameOverride 当前k8s 集群显示的当前自己名字
• clusterCIDR 后面CNI网络的IP段，不能与任何网络重复，否则获报错

3、生成kube-proxy.kubeconfig文件

• 生成kube-proxy证书：

cat > /data/docker/TSL/k8s/kube-proxy-csr.json <<EOF
{
    "CN": "system:kube-proxy",
    "hosts": [],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF
#生成
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy

#复制
cp  kube-proxy*.pem /data/k8s/ssl/

• 生成kubeconfig文件：
  
  KUBE_APISERVER k8s-matser api 地址

KUBE_APISERVER="https://192.168.100.170:6443"
KUBE_PROXTCONFIG="/data/k8s/config/kube-proxy.kubeconfig"
kubectl config set-cluster kubernetes \
--certificate-authority=/data/k8s/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=${KUBE_PROXTCONFIG}

kubectl config set-credentials kube-proxy \
--client-certificate=/data/k8s/ssl/kube-proxy.pem \
--client-key=/data/k8s/ssl/kube-proxy-key.pem \
--embed-certs=true \
--kubeconfig=${KUBE_PROXTCONFIG}

kubectl config set-context default \
--cluster=kubernetes \
--user=kube-proxy \
--kubeconfig=${KUBE_PROXTCONFIG}

kubectl config use-context default --kubeconfig=${KUBE_PROXTCONFIG}

• 拷贝到配置文件指定路径：

cp kube-proxy.kubeconfig /data/k8s/kubernetes/config/

4、systemd管理kube-proxy

cat > /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Proxy
After=network.target
[Service]
EnvironmentFile=/data/k8s/config/kube-proxy.conf
ExecStart=/data/k8s/bin/kube-proxy \$KUBE_PROXY_OPTS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF

5、启动并设置开机启动

systemctl daemon-reload
systemctl start kube-proxy
systemctl enable kube-proxy

6、授权apiserver访问kubelet

cat > /root/apiserver-to-kubelet-rbac.yaml << EOF
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  annotations:
    rbac.authorization.kubernetes.io/autoupdate: "true"
  labels:
    kubernetes.io/bootstrapping: rbac-defaults
  name: system:kube-apiserver-to-kubelet
rules:
  - apiGroups:
      - ""
    resources:
      - nodes/proxy
      - nodes/stats
      - nodes/log
      - nodes/spec
      - nodes/metrics
      - pods/log
    verbs:
      - "*"
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: system:kube-apiserver
  namespace: ""
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:kube-apiserver-to-kubelet
subjects:
  - apiGroup: rbac.authorization.k8s.io
    kind: User
    name: kubernetes

EOF

kubectl apply -f /root/apiserver-to-kubelet-rbac.yaml