Kubernetes static pod

static pod

특정노드의 /etc/kubernetes/manifests 에 yaml로 저장된 pod 의 경우, kubelet이 동작하는 동안 필수적으로 구동되어야 하는 pod에 사용됨

1. node1에 static pod 생성

```bash
[root@node1 /etc/kubernetes/manifests]# vi nginx.yaml
[root@node1 /etc/kubernetes/manifests]# cat nginx.yaml
apiVersion: v1
kind: Pod
metadata:
  name: nginx-static-pod
spec:
  containers:
  - name: nginx-container
    image: nginx
    ports:
    - containerPort: 80
      protocol: TCP
```

2. master에서 확인

   [root@master ~/kube/06/init-pod]# kubectl get pod
   NAME                     READY   STATUS    RESTARTS   AGE
   nginx-static-pod-node1   1/1     Running   0          118s
   [root@master ~/kube/06/init-pod]# kubectl describe pod nginx-static-pod-node1
   Events:
     Type    Reason   Age    From     Message
     ----    ------   ----   ----     -------
     Normal  Pulling  2m14s  kubelet  Pulling image "nginx"
     Normal  Pulled   2m12s  kubelet  Successfully pulled image "nginx" in 2.292182966s (2.292187845s including waiting)
     Normal  Created  2m12s  kubelet  Created container nginx-container
     Normal  Started  2m12s  kubelet  Started container nginx-container

   ▶ scheduling 과정 없는 것을 확인할 수 있음 :: ∵ node에서 직접 생성

※ 기본적으로 kube-apiserver, kube-controller-manager, kube-scheduler는 master에 static pod로 띄워져 있음을 확인할 수 있음

[root@master /etc/kubernetes/manifests]# ls
kube-apiserver.yaml  kube-controller-manager.yaml  kube-scheduler.yaml