Kubernetes -- Server 部署

1.  Node 节点配置文件

1.1 下载相关的软件

wget https://dl.k8s.io/v1.13.1/kubernetes-server-linux-amd64.tar.gz
wget https://dl.k8s.io/v1.13.1/kubernetes-client-linux-amd64.tar.gz

上面的 client 包里只有一个 kubectl 的脚本，这个脚本在 kubernetes-server-linux-amd64.tar.gz 也有。

1.2. 创建一个文件  /opt/k8s/cfg/gen-cfg.sh ， 并增加执行权限，文件内容如下：

#! /bin/bash
# create TLS Bootstrapping Token
export BOOTSTRAP_TOKEN=$(head -c  /dev/urandom | od -An -t x | tr -d ' ')
cat > token.csv <<EOF
${BOOTSTRAP_TOKEN},kubelet-bootstrap,,"system:kubelet-bootstrap"
EOF

#----------------
#创建  kubelet bootstrapping 配置文件
export KUBE_APISERVER="https://192.168.137.81:6443"

# 设置 cluster 参数
kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/k8s/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
kubectl config set-context default \
  --cluster=kubernetes \
  --user=kubelet-bootstrap \
  --kubeconfig=bootstrap.kubeconfig

kubectl config use-context default --kubeconfig=bootstrap.kubeconfig

#-------------
#创建 kube-proxy 配置文件
kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/k8s/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=kube-proxy.kubeconfig

kubectl config set-credentials kube-proxy \
  --client-certificate=/opt/k8s/ssl/kube-proxy.pem \
  --client-key=/opt/k8s/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

1.3. 运行此脚本，会生成两个文件， 一个文件是 bootstrap.kubeconfig， 另一个是 kube-proxy.kubeconfig

2. Master

2.1 创建 apiserver 的配置文件  vim /opt/k8s/kube-apiserver.conf，内容如下：

KUBE_APISERVER_OPTS="--logtostderr=true \
--v= \
--etcd-servers=${ETCD_SERVERS} \
--insecure-bind-address=127.0.0.1 \
--bind-address=${MASTER_ADDRESS} \
--insecure-port= \
--secure-port= \
--advertise-address=${MASTER_ADDRESS} \
--allow-privileged=true \
--service-cluster-ip-range=10.10.10.0/ \
--admission-control=NamespaceLifecycle,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \
--kubelet-https=true \
--enable-bootstrap-token-auth \
--token-auth-file=/opt/k8s/cfg/token.csv \
--service-node-port-range=- \
--tls-cert-file=/opt/k8s/ssl/server.pem \
--tls-private-key-file=/opt/k8s/ssl/server-key.pem \
--client-ca-file=/opt/k8s/ssl/ca.pem \
--service-account-key-file=/opt/k8s/ssl/ca-key.pem \
--etcd-cafile=/opt/k8s/ssl/ca.pem \
--etcd-certfile=/opt/k8s/ssl/server.pem \
--etcd-keyfile=/opt/k8s/ssl/server-key.pem"

2.2 创建 service：   vim /usr/lib/systemd/system/kube-apiserver.service

[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=-/opt/k8s/cfg/kube-apiserver.conf
ExecStart=/opt/k8s/bin/kube-apiserver \$KUBE_APISERVER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target

2.3 启动 service 及查看状态

systemctl daemon-reload
systemctl enable kube-apiserver
systemctl restart kube-apiserver
systemctl status kube-apiserver

3. controller-manager

3.1  创建文件  vim /opt/k8s/cfg/kube-contoller-manager.conf，内容如下：

KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \
--v= \
--master=127.0.0.1: \
--leader-elect=true \
--address=127.0.0.1 \
--service-cluster-ip-range=10.10.10.0/ \
--cluster-name=kubernetes \
--cluster-signing-cert-file=/opt/k8s/ssl/ca.pem \
--cluster-signing-key-file=/opt/k8s/ssl/ca-key.pem  \
--root-ca-file=/opt/k8s/ssl/ca.pem \
--service-account-private-key-file=/opt/k8s/ssl/ca-key.pem"

3.2  创建文件  vim /usr/lib/systemd/system/kube-controller-manager.service，内容如下：

[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=-/opt/k8s/cfg/kube-controller-manager.conf
ExecStart=/opt/k8s/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target

3.3 启动 service 及查看状态

systemctl daemon-reload
systemctl enable controller-manager
systemctl restart controller-manager
systemctl status controller-manager

4. scheduler

4.1  创建文件  vim /opt/k8s/cfg/kube-scheduler.conf，内容如下：

KUBE_SCHEDULER_OPTS="--logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect"

4.2  创建文件  vim /usr/lib/systemd/system/kube-scheduler.service，内容如下：

[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=-/opt/k8s/cfg/kube-scheduler.conf
ExecStart=/opt/k8s/bin/kube-scheduler $KUBE_SCHEDULER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target

4.3 启动 service 及查看状态

systemctl daemon-reload
systemctl enable kube-scheduler
systemctl restart kube-scheduler
systemctl status kube-scheduler