二进制安装 kubernetes 1.12(四) - 部署 Node 节点组件

在 master 上操作

vi /etc/profile
export PATH=/opt/kubernetes/bin:$PATH

source /etc/profile

将 kubelet-bootstrap 用户绑定到系统集群角色

cd /opt/kubernetes/cfg

kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node-bootstrapper \
--user=kubelet-bootstrap

创建 kubeconfig 文件

# 创建 kubelet bootstrapping kubeconfig
BOOTSTRAP_TOKEN=674c457d4dcf2eefe4920d7dbb6b0ddc
KUBE_APISERVER="https://192.168.0.205:6443"

# 设置集群参数
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=bootstrap.kubeconfig 

# 设置客户端认证参数
kubectl config set-credentials kubelet-bootstrap \
--token=${BOOTSTRAP_TOKEN} \
--kubeconfig=bootstrap.kubeconfig

# 设置上下文参数
kubectl config set-context default \
--cluster=kubernetes \
--user=kubelet-bootstrap \
--kubeconfig=bootstrap.kubeconfig

# 设置默认上下文
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig

创建 kube-proxy kubeconfig 文件

cp /iba/master-ca/kube-proxy.pem /opt/kubernetes/ssl/
cp /iba/master-ca/kube-proxy-key.pem /opt/kubernetes/ssl/

kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=kube-proxy.kubeconfig

kubectl config set-credentials kube-proxy \
--client-certificate=/opt/kubernetes/ssl/kube-proxy.pem \
--client-key=/opt/kubernetes/ssl/kube-proxy-key.pem \
--embed-certs=true \
--kubeconfig=kube-proxy.kubeconfig

kubectl config set-context default \
--cluster=kubernetes \
--user=kube-proxy \
--kubeconfig=kube-proxy.kubeconfig

kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig 

# 将这两个文件拷贝到Node节点/opt/kubernetes/cfg目录下
bootstrap.kubeconfig kube-proxy.kubeconfig

ansible node -m copy -a 'src=bootstrap.kubeconfig dest=/opt/kubernetes/cfg'
ansible node -m copy -a 'src=kube-proxy.kubeconfig dest=/opt/kubernetes/cfg'

部署 kubelet 组件

cd /iba/tools/kubernetes/server/bin

ansible node -m copy -a 'src=kubelet dest=/opt/kubernetes/bin'
ansible node -m copy -a 'src=kube-proxy dest=/opt/kubernetes/bin'

ansible node -m shell -a 'chmod +x /opt/kubernetes/bin/kubelet'
ansible node -m shell -a 'chmod +x /opt/kubernetes/bin/kube-proxy'

在 node1 上执行

# 创建kubelet配置文件：
cat > /opt/kubernetes/cfg/kubelet << EOF
KUBELET_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.0.206 \
--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \
--bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \
--config=/opt/kubernetes/cfg/kubelet.config \
--cert-dir=/opt/kubernetes/ssl \
--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"
EOF

参数说明：
--hostname-override           // 在集群中显示的主机名
--kubeconfig                  // 指定kubeconfig文件位置，会自动生成
--bootstrap-kubeconfig        // 指定刚才生成的bootstrap.kubeconfig文件
--cert-dir                    // 颁发证书存放位置
--pod-infra-container-image   // 管理Pod网络的镜像

# kubelet.config配置文件如下
cat > /opt/kubernetes/cfg/kubelet.config << EOF
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 192.168.0.206
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS: ["10.0.0.2"]
clusterDomain: cluster.local.
failSwapOn: false
authentication:
  anonymous:
    enabled: true
EOF

systemd管理kubelet组件

cat > /usr/lib/systemd/system/kubelet.service << -'EOF'
[Unit]
Description=Kubernetes Kubelet
After=docker.service
Requires=docker.service

[Service]
EnvironmentFile=/opt/kubernetes/cfg/kubelet
ExecStart=/opt/kubernetes/bin/kubelet $KUBELET_OPTS
Restart=on-failure
KillMode=process

[Install]
WantedBy=multi-user.target
-EOF

启动 kubelet

chmod +x /opt/kubernetes/bin/kubelet

systemctl daemon-reload
systemctl enable kubelet
systemctl start kubelet
systemctl status kubelet 

# 把配置文件发送到 node2
scp /opt/kubernetes/cfg/kubelet root@192.168.0.207:/opt/kubernetes/cfg/

scp /opt/kubernetes/cfg/kubelet.config root@192.168.0.207:/opt/kubernetes/cfg/

scp /usr/lib/systemd/system/kubelet.service root@192.168.0.207:/usr/lib/systemd/system/

# 在 node2 上修改对应的 IP
vi /opt/kubernetes/cfg/kubelet
vi /opt/kubernetes/cfg/kubelet.config

chmod +x /opt/kubernetes/bin/kubelet

systemctl daemon-reload
systemctl enable kubelet
systemctl start kubelet
systemctl status kubelet

在 master 审批 Node 加入集群

cd /opt/kubernetes/bin
kubectl get csr
kubectl certificate approve XXXXX
kubectl get node

部署kube-proxy组件

# 在 node1 上执行
# 创建kube-proxy配置文件：
cat > /opt/kubernetes/cfg/kube-proxy << EOF
KUBE_PROXY_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.0.206 \
--cluster-cidr=10.0.0.0/24 \
--proxy-mode=ipvs \
--kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"
EOF

# systemd管理kube-proxy组件
cat > /usr/lib/systemd/system/kube-proxy.service << -'EOF'
[Unit]
Description=Kubernetes Proxy
After=network.target 

[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-proxy
ExecStart=/opt/kubernetes/bin/kube-proxy $KUBE_PROXY_OPTS
Restart=on-failure 

[Install]
WantedBy=multi-user.target
-EOF

chmod +x /opt/kubernetes/bin/kube-proxy

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

# 把配置文件发送到 node2
scp /opt/kubernetes/cfg/kube-proxy root@192.168.0.207:/opt/kubernetes/cfg/

scp /usr/lib/systemd/system/kube-proxy.service root@192.168.0.207:/usr/lib/systemd/system/

# 在 node2 上修改到对应的IP
vi /opt/kubernetes/cfg/kube-proxy 

chmod +x /opt/kubernetes/bin/kube-proxy

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