Replication Controller

*컨트롤러 종류

*Replication Controller

요구하는 pod의 개수를 보장하며 파드집합의 실행을 항상 안정적으로 유지하는 것을 목표

ReplicationController-definition

*Replication Controller 실습예제

kubectl create -f rc-nginx.yaml

kubectl get replicationcontrollers

(=kubectl get rc)

kubectl describe rc rc-nginx

kubectl run redis --image=redis --labels=app=webui --dry-run > redis.yaml

kubectl get pod --show-labels

kubectl create -f redis.yaml

kubectl edit rc rc-nginx

kubectl scale rc rc-nginx --replicas=2

 

ReplicationController 문제

[solution]

apiVersion: v1
kind: ReplicationController
metadata:
labels:
    app: main
    name: apache
    rel: stable
  name: rc-mainui
spec:
  replicas: 3
  selector:
    app: main
    name: apache
    rel: stable
  template:
    metadata:
      labels:
        app: main
        name: apache
        rel: stable
      name: mainui
    spec:
      containers:
      - image: httpd:2.2
        name: mainui