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Bug 1104199

Summary: RabbitMQ server shouldn't leave epmd running after being stopped
Product: Red Hat OpenStack Reporter: Fabio Massimo Di Nitto <fdinitto>
Component: rabbitmq-serverAssignee: Peter Lemenkov <plemenko>
Status: CLOSED NOTABUG QA Contact: Udi Shkalim <ushkalim>
Severity: high Docs Contact:
Priority: high    
Version: 5.0 (RHEL 7)CC: apevec, jeckersb, lhh, plemenko
Target Milestone: ---Keywords: ZStream
Target Release: 5.0 (RHEL 7)   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2017-02-22 12:02:28 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1104843    
Bug Blocks: 1083890    

Description Fabio Massimo Di Nitto 2014-06-03 13:31:02 UTC 
[root@rhos5-rabbitmq1 ~]# systemctl start rabbitmq-server

[root@rhos5-rabbitmq1 ~]# ps ax | grep erlang
... take a note ....

[root@rhos5-rabbitmq1 ~]# rabbitmqctl status
... note same error as #1104193

[root@rhos5-rabbitmq1 ~]# ps ax | grep erlang
notice the new process
 3652 ?        S      0:00 /usr/lib64/erlang/erts-5.10.4/bin/epmd -daemon

[root@rhos5-rabbitmq1 ~]# systemctl stop rabbitmq-server
[root@rhos5-rabbitmq1 ~]# ps ax | grep erlang
 3652 ?        S      0:00 /usr/lib64/erlang/erts-5.10.4/bin/epmd -daemon
Comment 2 Peter Lemenkov 2015-10-09 10:49:17 UTC 
It's not easy in systemd to detect if a service is idle. So far the best advice is to stop epmd@<ip-address>.service and the corresponding socket manually.

I believe we should close this ticket as CANTFIX.
Comment 3 Peter Lemenkov 2015-10-09 10:50:21 UTC 
See the discussion in fedora-devel on that matter:

http://thread.gmane.org/gmane.linux.redhat.fedora.devel/201512/focus=201540
Comment 4 Fabio Massimo Di Nitto 2015-10-09 12:25:37 UTC 
You can use:

[Service]
ExecStop=....

in order to use an external script to cleanup after you. I think there are also other keywords to trigger scripts or commands Before or After Stop.