更新时间:2021-12-03 06:08:47
[root@k8s-master ~]# systemctl start etcd
[root@k8s-master ~]# systemctl start docker
[root@k8s-master ~]# systemctl start kube-apiserver.service
[root@k8s-master ~]# systemctl start kube-apiserver.service
[root@k8s-master ~]# systemctl start kube-controller-manager.service
[root@k8s-master ~]# systemctl start kube-scheduler.service
[root@k8s-master ~]# systemctl start kubelet.service
[root@k8s-master ~]# systemctl start kube-proxy.service
[root@k8s-master ~]# kubectl expose deployment nginx-app --type=NodePort --port=80 --target-port=80
service "nginx-app" exposed
[root@k8s-master ~]# kubectl describe service nginx-app
Name: nginx-app
Namespace: default
Labels: run=nginx-app
Selector: run=nginx-app
Type: NodePort
IP: 10.254.73.139
Port: <unset> 80/TCP
NodePort: <unset> 30048/TCP
Endpoints: 172.17.0.2:80
Session Affinity: None
No events.
[root@k8s-master ~]# kubectl rolling-update frontend-v1 frontend-v2 --image=image:v2
etcd
:分布式存储;保存了整个集群的状态;
controller
:控制节点; 控制节点负责整个集群的管理,例如:容器调度、资源状态维护、自动扩展、滚动更新等;
node
:服务节点;服务节点是真正运行容器的主机;负责管理镜像和容器以及cluster内的服务发现和负载均衡;
核心层:Kubernetes最核心的功能,对外提供API构建高层应用,对内提供插件式应用执行环境;
应用层:部署(无状态应用、有状态应用、批处理任务、集群应用)和路由(服务发现、DNS解析)
管理层:系统度量()
ExecAction#在容器内执行一个命令,如果退出状态码为0,则容器健康;
TCPSocketActioon#通过容器的IP地址和端口号执行TCP检查;
HTTPGetAction#通过HTTP GET方法检查,如果状态码大于200且小于400,则容器健康;