myconfigmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: my-config
data:
  player_initial_lives: 3
  ui_properties_file_name: "myuser-interface.properties"
  game.properties: |
    enemy.types=firstline,zoomzoom
    player.maximum-lives=5
  user-interface.properties: |
    color.good=green
    color.bad=red
    allow.textmode=true

kubectl apply -f myconfigmap.yaml

kubectl describe configmaps my-config

kubectl get configmaps my-config -o yaml


kubectl create configmap myconfig-fromurl --from-file=game.properties

kubectl describe configmaps myconfig-fromurl


kubectl get configmaps myconfig-fromurl -o yaml

kubectl create -f configmap-multikeys.yaml
kubectl create -f pod-configmap-env-var-valueFrom.yaml

kubectl get configmaps special-config -o yaml

kubectl describe pod/dapi-test-pod

kubectl logs dapi-test-pod


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

myconfigmap.yaml
~~~~~~~~~~~~~~~
apiVersion: v1
kind: ConfigMap
metadata:
  name: my-config
data:
  player_initial_lives: "3"
  ui_properties_file_name: "myuser-interface.properties"
  game.properties: |
    enemy.types=firstline,zoomzoom
    player.maximum-lives="5"
  user-interface.properties: |
    color.good=green
    color.bad=red
    allow.textmode=true
    
~~~~~~~~~~~~~~~
game.properties
~~~~~~~~~~~~~~~
enemies=aliens
lives=3
enemies.cheat=true
enemies.cheat.level=xyz
secret.code.passphrase=XXXXXYYYYYYY
secret.code.allowed=true
secret.code.lives=30


~~~~~~~~~~~~~~~
configmap-multikeys.yaml
~~~~~~~~~~~~~~~
apiVersion: v1
kind: ConfigMap
metadata:
  name: special-config
  namespace: default
data:
  SPECIAL_LEVEL: Level4
  SPECIAL_TYPE: poweruser
  

~~~~~~~~~~~~~~~
pod-configmap-env-var-valueFrom.yaml
~~~~~~~~~~~~~~~
apiVersion: v1
kind: Pod
metadata:
  name: my-dapi-test-pod
spec:
  containers:
    - name: test-container
      image: k8s.gcr.io/busybox
      command: [ "/bin/sh", "-c", "echo $(SPECIAL_LEVEL_KEY) $(SPECIAL_TYPE_KEY)" ]
      env:
        - name: SPECIAL_LEVEL_KEY
          valueFrom:
            configMapKeyRef:
              name: special-config
              key: SPECIAL_LEVEL
        - name: SPECIAL_TYPE_KEY
          valueFrom:
            configMapKeyRef:
              name: special-config
              key: SPECIAL_TYPE
  restartPolicy: Never

~~~~~~~~~~~~~~~