getting error trying to run strace with kubectl debug mode

 

kubectl debug is quite limited and won't let you add for example, SYS_PTRACE (to run strace on your app). To resolve it, try adding shareProcessNamespace and add SYS_PTRACE in your deployment or pod. 

For example, 


apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  shareProcessNamespace: true
  containers:
  - name: nginx
    image: nginx
  - name: shell
    image: ubuntu
    command: ["sleep", "3600"]
    securityContext:
      capabilities:
        add:
        - SYS_PTRACE
    stdin: true
    tty: true


As you can see, we have a shell container and just runs ubuntu image. You can install strace -p PROCESS-ID since these containers are already sharing processes. 

Also noticed the SYS_PTRACE entry. This will resolve issues with strace permissions. 



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