Chapter 8: Troubleshooting Applications in Kubernetes

Activity 9: Troubleshooting an Application in Kubernetes

Solution:

Perform the following steps to complete this activity:

1. Create a Pod definition file that uses the suakbas/chapter08:v1 image and is consuming the LOG_LEVEL and ENABLE_CONNECTION environment variables from a ConfigMap named app-config. Name the file as pod.yaml:

   apiVersion: v1

   kind: Pod

   metadata:

   name: app

   spec:

   containers:

   - name: app

   image: suakbas/lesson08:v1

   env:

   - name: LOG_LEVEL

   valueFrom:

   configMapKeyRef:

   name: app-config

   key: log-level

   - name: ENABLE_CONNECTION

   valueFrom:

   configMapKeyRef:

   name: app-config

   key: enable-connection

2. Create a ConfigMap with the LOG_LEVEL field set to INFO and ENABLE_CONNECTION set to No. Name the file as configmap.yaml:

   apiVersion: v1

   kind: ConfigMap

   metadata:

   name: app-config

   data:

   log-level: "INFO"

   enable-connection: "No&quot...