You mention 'pacemaker'. Does anyone know of any other open-source projects that might accomplish the type of remote service dependency checking that I'm trying to accomplish? For example, if service A on server A depends on service B on server B is there a project that makes this type of checking possible/easy?
> Date: Fri, 26 Jun 2015 19:14:36 +0300 > From: arvidj...@gmail.com > To: ljkimme...@hotmail.com > CC: systemd-devel@lists.freedesktop.org; lnyk...@redhat.com > Subject: Re: [systemd-devel] SysVInit service migration to systemd > > В Fri, 26 Jun 2015 10:02:41 -0500 > Lesley Kimmel <ljkimme...@hotmail.com> пишет: > > > Thanks for the information. I've seen that blog before. Unfortunately, it > > only describes a starting a service that already has a good level of > > integration with some of the underlying infrastructure of systemd (e.g. > > dbus). Let me be a little more specific about what I'm trying to accomplish > > and see if anyone has any thoughts on how systemd could help (or impede me). > > > > I have a collection of servers hosting many processes such as Apache HTTPD, > > a database, and Java application servers. Using init these servers would: > > a) need to be started in a specific order and b) take a long time to start. > > To improve both of these scenarios I created a Python service which took an > > XML configuration file describing the dependencies of the various > > components. The Python service is started by init and forks so as to not > > stop the boot process. The forked process then does some basic dependency > > checking (including remote tests, mostly telnet or pings) before starting > > local services using init scripts that are not configured to be started by > > init. > > That sounds exactly like what pacemaker does. > > > > > I'm wondering, with systemd, if this Python "control" daemon would be > > required at all. Does systemd have the ability to check the status of > > remote servers? > > No.
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