[CentOS] C8 regression / tmp on tmpfs

[Orion Poplawski]

On 10/22/19 7:04 AM, Leon Fauster via CentOS wrote:
> Am 22.10.19 um 04:52 schrieb Orion Poplawski:
>> On 10/21/19 3:42 PM, Leon Fauster via CentOS wrote:
>>> Does someone have a working tmp on tmpfs via
>>>
>>> systemctl enable tmp.mount
>>>
>>> under CentOS8/RHEL8? This seems to work straight in EL7 ...
>>>
>>>
>>> # LANG=C systemctl enable tmp.mount
>>> The unit files have no installation config (WantedBy, RequiredBy, 
>>> Also, Alias
>>> settings in the [Install] section, and DefaultInstance for template 
>>> units).
>>
>> Looks like a known issue:
>>
>> https://bugzilla.redhat.com/show_bug.cgi?id=1667065
>>
> 
> It works in EL7 and F30. In EL8 it seems to be intentional :
> 
> $ rpm -q --changelog systemd |grep tmp.mount
> 
> - unit: don't add Requires for tmp.mount (#1619292)
> 
> $ grep -E 'tmpfs|tmp.mount' systemd.spec |grep -v devpts
> 
> Patch0004: 0004-Avoid-tmp-being-mounted-as-tmpfs-without-the-user-s-.patch
> Patch0059: 0059-unit-don-t-add-Requires-for-tmp.mount.patch
> # No tmp-on-tmpfs by default in RHEL. bz#876122 bz#1578772
> rm -f 
> %{buildroot}%{_prefix}/lib/systemd/system/local-fs.target.wants/tmp.mount
> - unit: don't add Requires for tmp.mount (#1619292)
> - avoid /tmp being mounted as tmpfs without the user's will (#1578772)
> - do not mount /tmp as tmpfs (#1578772)
> - Enable /var/run and /var/lock on tmpfs
> 
> 
> The "remove" stanza leads to the missing "WantedBy".
> 
> Unfortunately all bz# are private ... so why they remove this 
> functionality? We then at least known what impact it has when
> enabled.
> 

I'm not quite sure why you don't appear to have read the bug I pointed 
to.  It has been fix in git (c8-beta branch) and will either be out with 
8.1 or with an errata earlier if it is judged to be worth it.

-- 
Orion Poplawski
Manager of NWRA Technical Systems          720-772-5637
NWRA, Boulder/CoRA Office             FAX: 303-415-9702
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