Bug 1297580 - cinder GID is stolen by epmd
cinder GID is stolen by epmd
Product: Red Hat OpenStack
Classification: Red Hat
Component: openstack-cinder (Show other bugs)
8.0 (Liberty)
x86_64 Linux
urgent Severity urgent
: ga
: 8.0 (Liberty)
Assigned To: hguemar
Depends On:
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Reported: 2016-01-11 18:06 EST by Emilien Macchi
Modified: 2016-04-26 11:35 EDT (History)
5 users (show)

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Doc Type: Bug Fix
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Last Closed: 2016-01-14 03:54:22 EST
Type: Bug
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RHEL 7.3 requirements from Atomic Host:
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Description Emilien Macchi 2016-01-11 18:06:28 EST
Currently, cinder packaging does:
useradd -u 165 (...)

But when installing epmd (erlang process), it does:
new user: name=epmd, UID=165, GID=155, home=/tmp, shell=/sbin/nologin

So cinder user is not created.
It's a very recent change in epmd and breaks all versions of Cinder.
If you want to see CI failures:

(grep 165 to see outputs).

Note: before, epmq was using GID 106:
Comment 1 Eric Harney 2016-01-12 11:18:51 EST

The setup package's uidgid file in RHEL indicates that Cinder owns gid 165...?
Comment 2 Eric Harney 2016-01-12 11:24:35 EST
IMO the Cinder package in OSP is correct and we should the epmd package as needed downstream to fix this.
Comment 3 hguemar 2016-01-12 11:26:31 EST
Yes, I discussed this w/ Sergey earlier and we decided that we should do that change.

We're currently discussing within RDO to drop static allocation altogether as we can't prevent similar issues (and Fedora is already recommending to use dynamic allocation).
Comment 5 hguemar 2016-01-14 03:54:22 EST
Change reverted in dist-git.
For RDO, we decided to keep static UID/GID for existing services, new services will use dynamic UID/GID unless required.

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