Pod naming ignores dashes and underscores

Apache Airflow version: 2.0.2

Kubernetes version (if you are using Kubernetes) (use kubectl version): Client Version: version.Info{Major:“1”, Minor:“19”, GitVersion:“v1.19.11”, GitCommit:“c6a2f08fc4378c5381dd948d9ad9d1080e3e6b33”, GitTreeState:“clean”, BuildDate:“2021-05-12T12:27:07Z”, GoVersion:“go1.15.12”, Compiler:“gc”, Platform:“darwin/amd64”} Server Version: version.Info{Major:“1”, Minor:“19+”, GitVersion:“v1.19.10-gke.1600”, GitCommit:“7b8e568a7fb4c9d199c2ba29a5f7d76f6b4341c2”, GitTreeState:“clean”, BuildDate:“2021-05-07T09:18:53Z”, GoVersion:“go1.15.10b5”, Compiler:“gc”, Platform:“linux/amd64”}

What happened: I am running Airflow within GKE, one pod, a git-sync container for dags, two containers (same image) for the webserver and scheduler. I utilize Kubernetes Executor and Kubernetes Pod Operators. When I run task I see pod with the name matching the pattern dag_idtask_id.hash. But this naming ignores dashes and underscores. Example, dag_id='inititializer_prefix', and task_id='job_prefix'. In kubectl get pods I see initializerprefixjobprefix.6d5191b91782409082d46dd3b0ea97f9

What you expected to happen:

I expect executor pod to have name like initializer_prefixjob_prefix.6d5191b91782409082d46dd3b0ea97f9 at least, or initializer_prefix_job_prefix.6d5191b91782409082d46dd3b0ea97f9 (autoseparation of dag_id and task_id by underscore)

[ashb]

Pod names need to be valid DNS labels, and so can’t have underscores in them anyway https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#dns-label-names.

We could make it more legabile by having _ -> -, and then also separating as OP suggestes

[uranusjr]

The docstring seems to suggest the original author knew, but didn’t want to deal with edge cases in the rules, and just took the simplest route by removing everything.