K8s安装

• 硬件
  • 本地ubuntu18.04
  • 虚拟机vmware
• 软件
  • docker-machine
  • etcd
  • kubernetes

给节点安装docker

  docker-machine create --driver generic --generic-ip-address=192.168.1.10 k8s-node1

安装

1. 规划

2. 软件下载

2.1 Kubernetes二进制文件下载

kubernetes下载,从CHANGELOG页面下载二进制文件，如图所示为其Linux Server版本

2.2 etcd数据库下载

etcd下载这里选用的是最新版本v3.4.3.

3. Master安装

3.1 etcd安装

etcd安装

3.2 Master组件

• kube-apiserver
• kube-controller-manager
• kube-scheduler

3.2.1 复制二进制文件到/usr/bin目录

将kube-apiserver,kube-controller-manager,kube-scheduler三个可执行文件复制到/usr/bin目录,并给执行权限

3.2.2 kube-apiserver

在/usr/lib/systemd/system/目录下创建文件kube-apiserver.service内容为:

[Unit]
Description=Kubernetes API Server
After=etcd.service
Wants=etcd.service

[Service]
EnvironmentFile=/etc/kubernetes/apiserver
ExecStart=/usr/bin/kube-apiserver  \
        $KUBE_ETCD_SERVERS \
        $KUBE_API_ADDRESS \
        $KUBE_API_PORT \
        $KUBE_SERVICE_ADDRESSES \
        $KUBE_ADMISSION_CONTROL \
        $KUBE_API_LOG \
        $KUBE_API_ARGS 
Restart=on-failure
Type=notify
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

其中EnvironmentFile为kube-apiserver的配置文件

3.2.3 kube-aouserver配置文件

在/etc/kubernetes/目录下创建文件apiserver,内容为:

KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"
KUBE_API_PORT="--insecure-port=8080"
KUBE_ETCD_SERVERS="--etcd-servers=http://192.168.1.12:2379"
KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=172.18.0.0/16"
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota"
KUBE_API_LOG="--logtostderr=false --log-dir=/var/log/kubernets/apiserver --v=2"
KUBE_API_ARGS=" "

3.2.4 kube-controller-manager

在/usr/lib/systemd/system/目录下创建kube-controller-manager.service，内容为：

[Unit]
Description=Kubernetes Scheduler
After=kube-apiserver.service 
Requires=kube-apiserver.service

[Service]
EnvironmentFile=-/etc/kubernetes/controller-manager.conf
ExecStart=/usr/bin/kube-controller-manager \
        $KUBE_MASTER \
        $KUBE_CONTROLLER_MANAGER_ARGS
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

3.2.5 kube-controller-manager配置文件

在/etc/kubernetes/目录下创建文件controller-manager,内容为

KUBE_MASTER="--master=http://192.168.1.12:8080"
KUBE_CONTROLLER_MANAGER_ARGS=" "

3.2.6 kube-scheduler

在/usr/lib/systemd/system/目录下创建kube-scheduler.service，内容为：

[Unit]
Description=Kubernetes Scheduler
After=kube-apiserver.service 
Requires=kube-apiserver.service

[Service]
User=root
EnvironmentFile=-/etc/kubernetes/scheduler.conf
ExecStart=/usr/bin/kube-scheduler \
        $KUBE_MASTER \
        $KUBE_SCHEDULER_ARGS
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

3.2.7 kube-scheduler配置文件

在/etc/kubernetes/目录下创建文件scheduler,内容为

KUBE_MASTER="--master=http://192.168.1.12:8080"
KUBE_SCHEDULER_ARGS="--logtostderr=true --log-dir=/var/log/kubernetes/scheduler --v=2"

3.2.7 各组件开机启动

systemctl daemon-reload
systemctl enable kube-apiserver.service
systemctl start kube-apiserver.service
systemctl enable kube-controller-manager.service
systemctl start kube-controller-manager.service
systemctl enable kube-scheduler.service
systemctl start kube-scheduler.service

3.2.8 检验正确

kubectl get cs
systemctl status kube-apiserver kube-controller-manager kube-scheduler

4 Node安装

4.1 组件列表

• docker
• kube-proxy
• kubelet