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...