I will prefix by saying I am very new to LXC so apologies in advance for any really obvious questions…
I have just installed the Nomad LXC Driver and I can run the example job no problem. The difference is that the example application given with the driver is deploying a busybox container using an LXC template. What I now have is an LXC image that I have exported and now have a .tar.gz file. I would like to run that image but the driver expects a template to be given which seems to be some kind of a shell script.
There doesn’t seem to be many docs or other examples about the driver out there on the internet so I was wondering if anyone else had any extra insight? If I have to write a template then that is fine also but I can’t seem to be able to find any documentation on that either.
My end goal is to build a container image that includes my application and be able to deploy that image multiple times into the nomad cluster.
we’re not using it in production but considered it for quite some time and went through a intense protoype phase.
Here is what i learned back then:
Code your own lxc-template and use the template and template_args driver options.
A lxc-template is nothing more then a executable (shell script, python, go, …) stored in /usr/share/lxc/templates/lxc-yourtemplate. Such a template is a factory which produces new containers.
The template can use any arguments to create the container directory in /var/lib/lxc, unpack your rootfs, write a config file etc. Best to have a look into the existing templates like “download” or “busybox” to learn about how it works.
It can further be used to download (wget/curl) your image from some another place to emulate a “pull image” operation. Alternatively it can be combined later with nomads artifact stanza etc.
