Kubernetes Lab 2 - Pod Configuration

HANDS ON LAB:

Pod Configuration

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            Problem
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           <p> What you'll learn</p>
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            Exercises
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        Create definition file like  <span style="padding: 0px 5px 0px 10px;background-color: grey;border-radius: 4px;"> yoda-service-pod.yml </span>, and then using the definition file create a POD, ConfigMap,Secret and Service Account.
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       To learn the POD, ConfigMap, Secret and Service Account creation and configuration. 
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        <ul style="padding-left: 10px; !important">
        <li>Create the definition file for POD, ConfigMap, Secret and Service Account</li>
        <li>Execute the command and create the respective resources</li>
        <li>Verify the created resources</li>
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        Beginner
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        15 Min
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apiVersion: v1
kind: ConfigMap
metadata:
  name: yoda-service-config
data:
  yoda.cfg: |-
    yoda.baby.power=100000000
    yoda.strength=10

apiVersion: v1
kind: Secret
metadata:
  name: yoda-db-password
stringData:
  password: 0penSh1ftRul3s!

apiVersion: v1
kind: Pod
metadata:
  name: yoda-service
spec:
  serviceAccountName: yoda-svc
  containers:
  - name: yoda-service
    image: bitnami/nginx
    volumeMounts:
    - name: config-volume
      mountPath: /etc/yoda-service
    env:
    - name: DB_PASSWORD
      valueFrom:
        secretKeyRef:
          name: yoda-db-password
          key: password
    resources:
      requests:
        memory: "64Mi"
        cpu: "250m"
      limits:
        memory: "128Mi"
        cpu: "500m"
  volumes:
  - name: config-volume
    configMap:
        name: yoda-service-config
        key:service-config

Create the Service Account executing the following command.

shell script oc create sa yoda-svc -n {DEV_NAMESPACE}

Once the Service Account created, create the ConfigMap,Secret.
Create the Yaml file for POD, ConfigMap, Secret using below POD configuration.
Execute the below command for creating ConfigMap,Secret.

shell script oc apply -f Downloads/yoda-service-config.yaml -n {DEV_NAMESPACE} oc apply -f Downloads/yoda-db-password.yaml -n {DEV_NAMESPACE}
- Execute the below command for creating the POD.

shell script oc apply -f Downloads/yoda-service-pod.yml -n {DEV_NAMESPACE}

Verification¶

To verify your setup is complete, check /etc/yoda-service for the yoda.cfg file and use the cat command to check it's contents.

kubectl exec -it yoda-service /bin/bash
cd /etc/yoda-service
cat yoda.cfg