Configmap user is not right, securityContext config not working

General Discussions
#1

Hi
I configed as follow:

spec:
  securityContext:
    runAsUser: 1000
    runAsGroup: 1000
    fsGroup: 1000

which i expected configmap files owner is service, but not working
when i configed as this, the file ownership is root:servicegroup
any ideas?