ConfigMaps: K8S - 2 · Samarthya

We looked at using the environment variables using the configmap in the last blog.

The config map remains the same but now in YAML.

apiVersion: v1
kind: ConfigMap
metadata:
  name: happy-faces-mnt
data:
  data.values: |-
    my.name=samarthya
    my.profession=engineer

I will use this to mount it to a container and then see the contents of the file.

apiVersion: v1
kind: Pod
metadata:
  name: happy-pod
spec:
  containers:
  - name: bbox-pod
    image: busybox:latest
    command: ['sh','-c',"echo hello world! && sleep 3600"]
    volumeMounts:
    - name: my-volume
      mountPath: /etc/values
      readOnly: true
  volumes:
  - name: my-volume
    configMap:
      name: happy-faces-mnt

Have added a volume and mount.

volumes:
  - name: my-volume
    configMap:
      name: happy-faces-mnt

configMap listing for my machine is as under

k get cm
NAME              DATA   AGE
happy-faces-mnt   1      36m

k describe cm

Name:         happy-faces-mnt
Namespace:    default
Labels:       <none>
Annotations:  
Data
====
data.values:
----
my.name=samarthya
my.profession=engineer
Events:  <none>

Run the pod

k get pods
NAME        READY   STATUS    RESTARTS   AGE
happy-pod   1/1     Running   0          8m21s

Check the mounted volume using

k exec pod/happy-pod -- cat /etc/values/data.values
my.name=samarthya
my.profession=engineer

The content of the file are shown.

Author

Samarthya

Engineer, learner, tinkerer. This is my trophy shelf of everyday work and leisure.

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