在CI test的时候报错：shell not found

错误提示

Running with gitlab-runner 11.5.0 (3afdaba6)
  on product schedule ci test e0ce56b5
Using Docker executor with image python:3.8 ...
Pulling docker image python:3.8 ...

shell not found
shell not found
ERROR: Job failed: exit code 1

原因

摸索一番之后觉得问题可能出在python版本上，以下是gitlab-runner config.toml设置

[[runners]]
  name = "product schedule ci test"
  url = ""
  token = ""
  executor = "docker"
  [runners.docker]
    tls_verify = false
    image = "python:3.8"
    privileged = false
    disable_entrypoint_overwrite = false
    oom_kill_disable = false
    disable_cache = false
    volumes = ["/cache"]
    shm_size = 0
  [runners.cache]
    [runners.cache.s3]
    [runners.cache.gcs]

gitlab-runner在pull的时候，应该是拉了最新的python3.8镜像，最新的镜像应该是兼容性的问题，知道问题出在哪就好办了

修改gitlab-runner config.toml，指定python版本

[[runners]]
  name = "product schedule ci test"
  url = ""
  token = ""
  executor = "docker"
  [runners.docker]
    image = "python:3.8.9"