grepthat opened a new issue #16362:
URL: https://github.com/apache/airflow/issues/16362
Apache Airflow version: master
Kubernetes version: v1.19.3
Environment: Ubuntu 18.04 Server
I'm using Airflow with the **KubernetesExecutor**. Certain tasks create a
k8s container with status **"ContainerCannotRun".** Looking at the kubelet logs
I see `"hostname for pod:"XX" was longer than 63. Truncated hostname to :"XY"`
```bash
❯ kubectl get pods -n airflow
NAME
READY STATUS RESTARTS AGE
202103x8projectxyzsubsetabcsinglesequenceprocessingtgsurveyset0.a9f22a70681c4c9aaa16f04602a9f350
0/1 ContainerCannotRun 0 13h
202103x8projectxyzsubsetabcsinglesequenceprocessingtgsurveyset0.b0a2134828c14a0fb7e63a3d4bfd6f0c
0/1 ContainerCannotRun 0 13h
❯ sudo journalctl -u kubelet -f
Jun 10 06:06:22 atremata.lan kubelet[2856]: E0610 06:06:22.483466 2856
kubelet_pods.go:403] hostname for
pod:"202104usadrycreektgsurveyset000ex003tsmoothingquadadjustere8422.4fbe91ce276048ea8d99b74ffdbda909"
was longer than 63. Truncated hostname to
:"202104usadrycreektgsurveyset000ex003tsmoothingquadadjustere8422"
```
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