[systemd-devel] SysVInit service migration to systemd

[Graham Cantin]

One I might point out is Spotify's "Luigi" python framework.
http://luigi.readthedocs.org/en/latest/index.html
At first glance, it might look like it's really hadoop specific -- and it
used to be, but the hadoop stuff's been scooped off to a contrib module.
Don't let that fool you though, it's actually quite generic and useful for
many things -- it's a lot more like GNU make where you describe the state
things should be in to proceed.

If you're stuck doing complex dependency control; expressing it to luigi is
far less of a headache.



On Mon, Jul 6, 2015 at 11:18 AM, Lesley Kimmel <ljkimmel99 at hotmail.com>
wrote:

> 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: arvidjaar at gmail.com
> > To: ljkimmel99 at hotmail.com
> > CC: systemd-devel at lists.freedesktop.org; lnykryn at redhat.com
> > Subject: Re: [systemd-devel] SysVInit service migration to systemd
> >
> > В Fri, 26 Jun 2015 10:02:41 -0500
> > Lesley Kimmel <ljkimmel99 at 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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>


-- 
Graham Cantin | (408) 890-7463
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