[Bug 1734225] Re: Invalid service name defined in /etc/ctdb/events.d/50.samba

[Thomas Smith]

I ran into this problem as well, and the solution (editing
/etc/default/ctdb) does resolve the issue.

Note, too, that this issue will prevent a CTDB cluster (or at least the
problem node) from coming online (i.e. indicating a status of "HEALTHY")
until the mentioned settings are updated.

One thing I would adjust (versus what the OP indicated) is changing the
related variables in 50.samba to:

    CTDB_SERVICE_SMB=${CTDB_SERVICE_SMB:-smbd}
    CTDB_SERVICE_NMB=${CTDB_SERVICE_NMB:-nmbd}

instead of:

    CTDB_SERVICE_SMB=smbd
    CTDB_SERVICE_NMB=nmbd

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https://bugs.launchpad.net/bugs/1734225

Title:
  Invalid service name defined in /etc/ctdb/events.d/50.samba

Status in samba package in Ubuntu:
  Confirmed

Bug description:
  The CTDB deployed /etc/ctdb/events.d/50.samba script contain the following code to detect the smbd/nmbd service name:
  ---
  case $CTDB_INIT_STYLE in
          suse)
                  CTDB_SERVICE_SMB=${CTDB_SERVICE_SMB:-smb}
                  CTDB_SERVICE_NMB=${CTDB_SERVICE_NMB:-nmb}
                  ;;
          debian)
                  CTDB_SERVICE_SMB=${CTDB_SERVICE_SMB:-samba}
                  CTDB_SERVICE_NMB=${CTDB_SERVICE_NMB:-""}
                  ;;
          *)
                  # Use redhat style as default:
                  CTDB_SERVICE_SMB=${CTDB_SERVICE_SMB:-smb}
                  CTDB_SERVICE_NMB=${CTDB_SERVICE_NMB:-""}
                  ;;
  esac
  ---

  It detects Ubuntu as Debian (/etc/ctdb/functions) and so define that
  the smb service is named "samba" and the nmb service does not exists.

  That could be OK since Samba deploy an "samba" init script as well as
  smbd and nmbd. Except, this init script does not really work to start
  smbd and nmbd.

  To make CTDB happy, the previous code must be modified:
  --- 50.samba.orig	2017-11-23 23:34:35.146314429 +0000
  +++ 50.samba	2017-11-23 23:35:08.161814684 +0000
  @@ -14,8 +14,8 @@
   		CTDB_SERVICE_NMB=${CTDB_SERVICE_NMB:-nmb}
   		;;
   	debian)
  -		CTDB_SERVICE_SMB=${CTDB_SERVICE_SMB:-samba}
  -		CTDB_SERVICE_NMB=${CTDB_SERVICE_NMB:-""}
  +		CTDB_SERVICE_SMB=smbd
  +		CTDB_SERVICE_NMB=nmbd
   		;;
   	*)
   		# Use redhat style as default:

  
  I reproduced this issue on both Ubuntu 16.04 and 14.04. But it does not exists on Debian Stretch (the 50.samba has been updated).

  
  An easier workaround to avoid updating the 50.samba script is to set those 2 service name in the /etc/default/ctdb:

  CTDB_SERVICE_SMB=smbd
  CTDB_SERVICE_NMB=nmbd

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