目录
1.首先建立3个centos7.6的虚拟机。比如用流行的VirtualBox
2.从k8s的github上下载最新版本的安装包。https://github.com/kubernetes/kubernetes/releases
3.通过winscp把windows上的下载的安装包copy到centos虚拟机上
4.更改各虚拟机的hostname, 比如一个为k8s-master:hostnamectl set-hostname k8s-master
5.先安装etcd服务, 参考前面的例子。 假设etcd和kube-apiserver的ip都是:10.6.119.106
6.在同一台机器上开始安装kube-apiserver
7.利用tar -xvzf命令解压后, 把kube-apiserver复制到/usr/local/bin/下。 如:mv /root/Downloads/kubernetes/server/bin/kube-apiserver /usr/local/bin/kube-apiserver
8.在/usr/lib/systemd/system目录下创建kube-apiserver.service,内容如下:
9.在/etc/下创建/etc/kube-apiserver/, 然后创建配置/etc/kube-apiserver/kube-apiserver.conf文件
10. 在/var/lib/下新建目录kube-apiserver
11.配置kube-apiserver开机启动
12. 发现enable报错:Failed to execute operation: Bad message。 查看/var/log/message发现具体内容为:
13.重复7-9的步骤, 配置kube-controller-manager, kube-scheduler。
14.kube-controller-manager.service如下:
15. kube-scheduler.service如下:
16.启动
17. sysemctl status xxxx来确认服务是否正确启动
18. kubectl cluster-info 和 kubectl get cs 来查看下 master是否正常
[Unit]
Description=Kubernetes API Service
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=network.target
After=etcd.service
[Service]
WorkingDirectory=/var/lib/kube-apiserver/
EnvironmentFile=-/etc/kube-apiserver/kube-apiserver.conf
ExecStart=/usr/local/bin/kube-apiserver $KUBE_LOGTOSTDERR $KUBE_LOG_LEVEL $KUBE_ETCD_SERVERS $KUBE_API_ADDRESS $KUBE_API_PORT $KUBELET_PORT $KUBE_ALLOW_PRIV $KUBE_SERVICE_ADDRESSES $KUBE_ADMISSION_CONTROL $KUBE_API_ARGS
Restart=on-failure
Type=notify
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"
KUBE_API_PORT="--insecure-port=8080"
KUBE_ETCD_SERVERS="--etcd-servers=http://10.6.119.106:2379"
KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=169.169.0.0/16"
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota"
KUBE_API_LOG="--logtostderr=false --log-dir=/var/lib/kube-apiserver --v=2"
KUBE_API_ARGS=" "
systemctl daemon-reload
systemctl enable kube-apiserver.service
systemctl start kube-apiserver.service
Mar 18 20:01:22 RT-NODE1 systemd: [/usr/lib/systemd/system/kube-apiserver.service:9] Trailing garbage, ignoring.
Mar 18 20:01:22 RT-NODE1 systemd: [/usr/lib/systemd/system/kube-apiserver.service:10] Missing '='.
也就是kube-apiserver.service内容的ExecStart配置有问题,对比了网上其他的配置以及替换测试发现还是同样的错。 后来把execstart的多参数放在一行启动成功了。
如下:ExecStart=/usr/local/bin/kube-apiserver $KUBE_LOGTOSTDERR $KUBE_LOG_LEVEL $KUBE_ETCD_SERVERS $KUBE_API_ADDRESS $KUBE_API_PORT $KUBELET_PORT $KUBE_ALLOW_PRIV $KUBE_SERVICE_ADDRESSES $KUBE_ADMISSION_CONTROL $KUBE_API_ARGS
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=kube-apiserver.service
Requires=kube-apiserver.service
[Service]
WorkingDirectory=/var/lib/kube-apiserver/
EnvironmentFile=-/etc/kube-apiserver/kube-controller-manager.conf
ExecStart=/usr/local/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_ARGS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
kube-controller-manager.conf如下:
KUBE_CONTROLLER_MANAGER_ARGS="--master=http://10.6.119.106:8080 --logtostderr=true --log-dir=/var/lib/kube-apiserver/ --v=0"
[Unit]
Description=Kubernetes Scheduler Plugin
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=kube-apiserver.service
Requires=kube-apiserver.service
[Service]
EnvironmentFile=-/etc/kube-apiserver/kube-scheduler.conf
ExecStart=/usr/local/bin/kube-scheduler $KUBE_SCHEDULER_ARGS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
kube-scheduler.conf如下:
KUBE_SCHEDULER_ARGS="--master=http://10.6.119.106:8080 --logtostderr=true --log-dir=/var/lib/kube-apiserver --v=0"
systemctl daemon-reload
systemctl enable kube-controller-manager.service
systemctl start kube-controller-manager.service
systemctl enable kube-scheduler.service
systemctl start kube-scheduler.service
[root@k8s-master ~]# kubectl cluster-info
Kubernetes master is running at http://localhost:8080
[root@k8s-master ~]# kubectl get cs
NAME STATUS MESSAGE ERROR
controller-manager Healthy ok
scheduler Healthy ok
etcd-0 Healthy {"health":"true"}
调试和离线文件参考:https://blog.csdn.net/muzizongheng/article/details/105067876