[lxc-users] is there a lxc-attach -v switch equivalent in lxc python bindings ?

[Benoit Barthelet]

thanks, that is exactly what I wanted !

On Tue, Mar 14, 2017 at 1:37 PM, Stéphane Graber <stgraber at ubuntu.com>
wrote:

> On Tue, Mar 14, 2017 at 11:22:26AM +0100, Benoit Barthelet wrote:
> > ultimately I'd like to do this in python:
> >
> > lxc-attach --clear-env -n lxcws -v TERM=xterm
> >
> > So far I managed to clear the env variables doing the following, but I
> > didn't find a way to pass the TERM env variable.
> >
> > container.attach_wait(lxc.attach_run_command,
> >                       ["apt-get", "dist-upgrade", "-y"],
> >                       env_policy=lxc.LXC_ATTACH_CLEAR_ENV)
>
> Easiest I think is to use your own attach function instead of the
> generic lxc.attach_run_command. In that function you can then set
> os.environ as you want and call subprocess to run the command you want.
>
> In the lxc-ci code we have something like this:
>
>     def execute(self, cmd, cwd="/"):
>         def run_command(args):
>             cmd, cwd = args
>
>             os.environ['PATH'] = '/usr/sbin:/usr/bin:/sbin:/bin'
>             os.environ['HOME'] = '/root'
>             if "env" in config and "proxy" in config['env']:
>                 os.environ["DEBIAN_FRONTEND"] = "noninteractive"
>                 os.environ['http_proxy'] = config['env']['proxy']
>                 os.environ['https_proxy'] = config['env']['proxy']
>
>             return subprocess.call(cmd, cwd=cwd)
>
>         if isinstance(cmd, str):
>             pid = self.container.init_pid
>             cmdpath = "/proc/%d/root/tmp/exec_script" % pid
>             with open(cmdpath, "w+") as fd:
>                 fd.write(cmd)
>             os.chmod(cmdpath, 0o755)
>             cmd = ["/tmp/exec_script"]
>
>         print(" ==> Executing: \"%s\" in %s" % (" ".join(cmd), cwd))
>         return self.container.attach_wait(run_command,
>                                           (cmd, cwd),
>                                           env_policy=lxc.LXC_ATTACH_
> CLEAR_ENV)
>
>
>
> --
> Stéphane Graber
> Ubuntu developer
> http://www.ubuntu.com
>
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>



-- 
benoit barthelet
http://pgp.mit.edu/pks/lookup?op=get&search=0xF150E01A72F6D2EE
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