CentOS - Dec 2015 - CentOS 7 (1511) is released

On 12/15/2015 03:51 PM, Leon Fauster wrote:
> Am 15.12.2015 um 14:31 schrieb Zdenek Sedlak <dev at apgrco.com>:
>> On 12/15/2015 02:23 PM, Dennis Jacobfeuerborn wrote:
>>> On 15.12.2015 03:22, John R Pierce wrote:
>>>> On 12/14/2015 3:46 PM, Wes James wrote:
>>>>
>>>> most service updates will restart the service
>>>
>>> Will they? That sound like a pretty terrible idea.
>>>
>>> Regards,
>>>  Dennis
>>>
>>>
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>>
>> No they don't (opposite to e.g. Debian).
> 
> 
> 
> If updated via rpm/yum, they do a "condrestart", but OPs 
> context is an 7.1503 to 7.1511 "upgrade". Thus, the execution 
> environment changes significantly (glibc, kernel etc.) and 
> this should be addressed with a reboot. If in the future only 
> a "service" (e.g. httpd) gets an update, then rpm handles the 
> restarting process of the running service.
> 
> --
> LF
> 
> 
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> 
Thank for the explanation. When did this change? I always believed the
running daemon is not touched by rpm/yum...

IMHO this is a dangerous behaviour because of possible configuration
changes which need to be merged first...


//Zdenek

On Tue, Dec 15, 2015 at 04:29:12PM +0100, Zdenek Sedlak wrote:
> Thank for the explanation. When did this change? I always believed the
> running daemon is not touched by rpm/yum...
> 
> IMHO this is a dangerous behaviour because of possible configuration
> changes which need to be merged first...
The change was made years ago. From the lack of screaming, you can
tell that rpm is being reasonably clever about it.

Apache, for example, checks its config syntax before restarting: man
apachectl, see 'graceful' and 'restart'.

-- greg

On 12/15/2015 08:51 AM, Greg Lindahl wrote:
> The change was made years ago. From the lack of screaming, you can
> tell that rpm is being reasonably clever about it.
I can find no evidence that rpm does anything of the sort.  httpd 
restarts on upgrade because its maintainers included a command to do so 
in the %posttrans scriptlet.
> Apache, for example, checks its config syntax before restarting: man
> apachectl, see 'graceful' and 'restart'.
httpd checks its configuration syntax before *reloading* which is not 
what happens during an rpm upgrade.  An upgrade will run "systemctl 
try-restart", which stops and starts the service if it is running.