Fix: Drupal solution: MySQL deployment error due MYSQL_USER

[lyoum]

MySQL deployment pod error while using existing drupal-mysql.yaml config.

There seems no MYSQL_USER anymore at secret.

PS. This seems to be a problem with a newer docker version because this used to work before and not throw an error.
Docker PR: docker-library/mysql#749

controlplane $ kubectl get pods
NAME                            READY   STATUS    RESTARTS   AGE
drupal-865b5f5594-hz7rz         1/1     Running   0          18m
drupal-mysql-77d6988c7b-x9czh   0/1     Error     4          113s

Events:
  Type     Reason     Age                From               Message
  ----     ------     ----               ----               -------
  Normal   Scheduled  41s                default-scheduler  Successfully assigned default/drupal-mysql-77d6988c7b-cx6c6 to node01
  Normal   Pulled     22s (x3 over 40s)  kubelet, node01    Container image "mysql:5.7" already present on machine
  Normal   Created    21s (x3 over 40s)  kubelet, node01    Created container mysql
  Normal   Started    21s (x3 over 40s)  kubelet, node01    Started container mysql
  Warning  BackOff    10s (x4 over 38s)  kubelet, node01    Back-off restarting failed container

Logs

controlplane $ kubectl logs -f drupal-mysql-77d6988c7b-cx6c6
2022-05-04 03:43:20+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 5.7.38-1debian10 started.
2022-05-04 03:43:20+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql'
2022-05-04 03:43:20+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 5.7.38-1debian10 started.
2022-05-04 03:43:20+00:00 [ERROR] [Entrypoint]: MYSQL_USER="root", MYSQL_USER and MYSQL_PASSWORD are for configuring a regular user and cannot be used for the root user
    Remove MYSQL_USER="root" and use one of the following to control the root user password:
    - MYSQL_ROOT_PASSWORD
    - MYSQL_ALLOW_EMPTY_PASSWORD
    - MYSQL_RANDOM_ROOT_PASSWORD

Solution

• Removed MYSQL_USER lines in drupal-mysql.yaml

Refer
mysql-docker-container-keeps-restarting