Re: [CentOS] CentOS 7 (1511) is released

On Tue, Dec 15, 2015 at 10:04:50AM -0800, Gordon Messmer wrote:

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.

I can think of another example of a package restarting a service:

The glibc and glibc-common packages run a command called /usr/sbin/glibc_post_upgrade.x86_64 or /usr/sbin/glibc_post_upgrade.i686 (depending on whether its an x86_64 or i686 package) in their RPM postinstall scriptlet.

It runs service sshd condrestart if it detects that /etc/rc.d/init.d/sshd exists (so, nothing on systemd-based systems). It also runs 'telinit u' too.