libvirt users - Oct 2014 - Re: How can a user process be automatically started after the container is started?

Dear All,

I want to start my application automatically after I start the container with a
virsh command " virsh -c lxc:/// start mycontainer"
How can I achieve this?

Thank you in advance.
Cheng

On Thu, Oct 23, 2014 at 05:09:50AM +0000, WANG Cheng D
wrote:
> Dear All,
> 
> I want to start my application automatically after I start the container
with a virsh command " virsh -c lxc:/// start mycontainer"
> How can I achieve this?
Whatever you specify as the <init>....</init> binary in the
container
XML file is started when the container is created. If you only want
1 application to run, then this is straightforward. If you want to
run multiple applications either point the "init" binary to a shell
script to run the many things, or better yet use a real init system
like systemd to spawn off the things you need.


Regards,
Daniel
-- 
|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|

Dear Daniel,

You said "use a real init system like systemd to spawn off the
things", do you mean a full OS distro container?

I installed the container using "yum --installroot=/root/fedora19lxc
--releasever=19 install -y openssh, bridge-utils" which is described at
https://www.redhat.com/archives/libvirt-users/2013-August/msg00007.html.

I don't know how to make systemd work in my current container. And I
don't know how to install a full OS distro container either. Could you give
me more guidance?

With my warmest regards,
Cheng

-----Original Message-----
From: Daniel P. Berrange [mailto:berrange@redhat.com] 
Sent: 2014年10月23日 16:11
To: WANG Cheng D
Cc: libvirt-users@redhat.com
Subject: Re: [libvirt-users] How can a user process be automatically started
after the container is started?

On Thu, Oct 23, 2014 at 05:09:50AM +0000, WANG Cheng D
wrote:
> Dear All,
> 
> I want to start my application automatically after I start the container
with a virsh command " virsh -c lxc:/// start mycontainer"
> How can I achieve this?
Whatever you specify as the <init>....</init> binary in the
container XML file is started when the container is created. If you only want
1 application to run, then this is straightforward. If you want to run multiple
applications either point the "init" binary to a shell script to run
the many things, or better yet use a real init system like systemd to spawn off
the things you need.


Regards,
Daniel
-- 
|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|