Exercise 8.1: Create a ConfigMap

CP 노드에 연결된 터미널로 이동

ConfigMap에 사용할 파일 생성

{
    mkdir primary
    echo c > primary/cyan
    echo m > primary/magenta
    echo y > primary/yellow
    echo k > primary/black
    echo "known as key" >> primary/black
    echo blue > favorite
}

ConfigMap 생성

kubectl create configmap colors \
--from-literal=text=black \
--from-file=./favorite \
--from-file=./primary/

생성된 ConfigMap 확인
```
kubectl get cm colors
```
생성된 ConfigMap 데이터 확인
```
kubectl get cm colors -o yaml 
```

Pod 생성

cat <<EOF | kubectl create -f -
apiVersion: v1
kind: Pod
metadata:
  name: shell-demo
spec:
  containers:
  - name: nginx
    image: nginx
    env:
    - name: ilike
      valueFrom:
        configMapKeyRef:
          name: colors
          key: favorite
EOF

생성된 Pod에 지정한 환경변수 확인

kubectl exec shell-demo -- /bin/bash -c 'echo $ilike'

Pod 삭제
```
kubectl delete pod shell-demo
```

Pod 생성

cat <<EOF | kubectl create -f -
apiVersion: v1
kind: Pod
metadata:
  name: shell-demo
spec:
  containers:
  - name: nginx
    image: nginx
    envFrom:
    - configMapRef:
        name: colors
EOF

생성된 Pod에 지정된 모든 환경변수 확인
```
kubectl exec shell-demo -- /bin/bash -c 'env'
```
Pod 삭제
```
kubectl delete pod shell-demo
```

ConfigMap 생성

cat <<EOF | kubectl create -f -
apiVersion: v1
kind: ConfigMap
metadata:
  name: fast-car
  namespace: default
data:
  car.make: Hyundai
  car.model: Ioniq
  car.trim: Exclusive
EOF

생성된 ConfigMap 데이터 확인
```
kubectl get cm fast-car -o yaml 
```

Pod 생성

cat <<EOF | kubectl create -f -
apiVersion: v1
kind: Pod
metadata:
  name: shell-demo
spec:
  containers:
  - name: nginx
    image: nginx
    volumeMounts:
      - name: car-vol
        mountPath: /etc/cars
  volumes:
    - name: car-vol
      configMap:
        name: fast-car
EOF

생성된 Pod에 마운트된 디렉토리 확인

kubectl exec shell-demo -- /bin/bash -c 'df -ha |grep cars'

생성된 Pod에 마운트된 파일 내용 확인

kubectl exec shell-demo -- /bin/bash -c 'cat /etc/cars/car.trim; echo'

Pod 삭제
```
kubectl delete pod shell-demo
```
ConfigMap 삭제
```
kubectl delete cm fast-car colors
```

Last updated 2 years ago