spring-boot-kube-deployment-port80-3467990654-5c8nl 0/1 CrashLoopBackOff

Question

Steps followed during rolling updates:

• Create an image for the v2 version of the application with some changes

• Re-Build a Docker Image with Maven. pom.xml. Run command in SSH or Cloud Shell:

  docker build -t gcr.io/satworks-1/springio/gs-spring-boot-docker:v2 .
  

• Push the new updated docker image to the Google Container Registry. Run command in SSH or Cloud Shell

  gcloud docker -- push gcr.io/satworks-1/springio/gs-spring-boot-docker:v2
  

• Apply a rolling update to the existing deployment with an image update. Run command in SSH or Cloud Shell

  kubectl set image deployment/spring-boot-kube-deployment-port80 spring-boot-kube-deployment-port80=gcr.io/satworks-1/springio/gs-spring-boot-docker:v2
  

• Revalidate the application again through curl or browser

  curl 35.227.108.89
  

  and observe the changes take effect.

When do we come across the "CrashLoopBackOff" error and how can we resolve this issue? Does it happen at application level or at kubernetes pods level?