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Docker couldn't use LDAP authentication

Hi there,

I’m trying to allow LDAP users in LDAP group ‘docker’ to connect docker and they got something this:
**[xxx.xxx@xxx-srv-xxx:xxx]$ docker ps -a
Cannot connect to the Docker daemon. Is the docker daemon running on this host?
**
now I can only work around this problem by adding them into the local group ‘docker’, then they will be able to connect, as ‘local’ docker group member.

is there something that I missed? anyone met this before?

Many thanks!