java not working in chrooted environment

Fri Oct 11 00:36:41 UTC 2013

Hi Saurabh,

I think you may be hitting a number of issues simultaneously.

1. precise and the local provider is not expected to work unless you
running the raring 3.8 HWE kernel, even then I'm not super confident
on that combination.
2. if juju ssh fails, there might be a problem with the key that you
are using, i can't really be more descriptive than that, but juju will
sniff out your id_{rsa,dsa}.pub and pass that into the machine via
cloud init as the key for the ubuntu user. machines do not allow
password authentication, you must use a key.
3. The original issue with java, if the hook is failing, can you
please post the source of the hook or charm.

Cheers

Dave

On Thu, Oct 10, 2013 at 7:37 PM, Saurabh <saurabh.kumar at techblue.co.uk> wrote:
> Hi Andrew,
> Thanks for your time, but juju ssh <unit> does not run in my setup. It gives
> the following error.
>
> "Warning: Permanently added '10.0.3.236' (ECDSA) to the list of known hosts.
> Permission denied (publickey).
> error: exit status 255"
>
> And yes I know that the machines that gets created by juju are lxc
> containers, and my concern is when they have proc already mounted then why
> does the install hook fails to load java?
>
>
> Thanks
> Saurabh.
>
>
> On 10/10/13 08:39, Andrew Wilkins wrote:
>
> On Wed, Oct 9, 2013 at 11:04 PM, Saurabh <saurabh.kumar at techblue.co.uk>
> wrote:
>>
>> Hi everybody,
>
>
> Hi Saurabh,
>
>>
>> I have Installed juju on my ubuntu 12.04 machine in a local environment.
>> I am writing a charm for an application development server, but It could
>> not get java.
>> I have written the install hook to install open_jdk via apt.
>> Java gets installed, when I manually chroot to the location of this
>> machine (chroot /var/lib/lxc/saurabh-local-machine-1/rootfs) and do a "which
>> java" command It says "/usr/bin/java". But when I do "java -version" it says
>> "java: error while loading shared libraries: libjli.so: cannot open shared
>> object file: No such file or directory "
>
>
> You probably don't want to chroot into the filesystem. If you want to run
> java from the context of the charm, then you can run "juju ssh <unit>" to
> get into the machine where the charm is installed.
>
> For example, I just bootstrapped a local environment and deployed apache2. I
> now have the unit "apache2/0" running on machine 1. I can log into that
> machine by doing "juju ssh apache2/0". In your example, you'll "juju ssh
> $servicename/0", and then you should be able to execute java.
>
>> On googling a bit I found that I will have to mount proc in the chrooted
>> environment. I tried to mount proc using the install hook by adding a line "
>> mount -t proc none /proc" but it could not mount /proc as in logs it says
>> proc already mounted still the application could not get java.
>> When I manually mount the proc in the chrooted environment and start the
>> app server it runs fine and java also starts working.
>>
>> So my question is how to mount proc using a hook in the chrooted
>> environment.
>> If any body has any idea please help.
>
>
> The charm does not run in a chroot, which is why you get the error. The
> charm runs in an LXC container, which already has a /proc. Consider it as a
> lightweight VM. You can read a little more about LXC here, if you're
> interested: http://lxc.sourceforge.net/
>
> Hope this helps.
>
> Cheers,
> Andrew
>
>>
>> Here is the log of that server unit.
>>
>>
>>
>> 2013-10-09 14:20:56 INFO juju.worker.uniter uniter.go:369 committing
>> "install" hook
>> 2013-10-09 14:20:56 INFO juju.worker.uniter uniter.go:387 committed
>> "install" hook
>> 2013-10-09 14:20:56 DEBUG juju.worker.uniter modes.go:410 ModeContinue
>> exiting
>> 2013-10-09 14:20:56 INFO juju.worker.uniter modes.go:408 ModeContinue
>> starting
>> 2013-10-09 14:20:56 INFO juju.worker.uniter modes.go:79 continuing after
>> "install" hook
>> 2013-10-09 14:20:56 DEBUG juju.worker.uniter modes.go:410 ModeContinue
>> exiting
>> 2013-10-09 14:20:56 INFO juju.worker.uniter modes.go:408 ModeConfigChanged
>> starting
>> 2013-10-09 14:20:56 DEBUG juju.worker.uniter.filter filter.go:407
>> discarded config event
>> 2013-10-09 14:20:56 INFO juju.worker.uniter uniter.go:354 running
>> "config-changed" hook
>> 2013-10-09 14:20:56 INFO juju.worker.uniter context.go:203 skipped
>> "config-changed" hook (not implemented)
>> 2013-10-09 14:20:56 INFO juju.worker.uniter uniter.go:362 ran
>> "config-changed" hook
>> 2013-10-09 14:20:56 INFO juju.worker.uniter uniter.go:369 committing
>> "config-changed" hook
>> 2013-10-09 14:20:57 INFO juju.worker.uniter uniter.go:387 committed
>> "config-changed" hook
>> 2013-10-09 14:20:57 DEBUG juju.worker.uniter modes.go:410
>> ModeConfigChanged exiting
>> 2013-10-09 14:20:57 INFO juju.worker.uniter modes.go:408 ModeContinue
>> starting
>> 2013-10-09 14:20:57 INFO juju.worker.uniter modes.go:79 continuing after
>> "config-changed" hook
>> 2013-10-09 14:20:57 DEBUG juju.worker.uniter modes.go:410 ModeContinue
>> exiting
>> 2013-10-09 14:20:57 INFO juju.worker.uniter modes.go:408 ModeStarting
>> starting
>> 2013-10-09 14:20:57 INFO juju.worker.uniter uniter.go:354 running "start"
>> hook
>> 2013-10-09 14:20:57 INFO juju.worker.uniter context.go:234 "HOOK mount:
>> proc already mounted"
>> 2013-10-09 14:20:57 INFO juju.worker.uniter uniter.go:362 ran "start" hook
>> 2013-10-09 14:20:57 INFO juju.worker.uniter uniter.go:369 committing
>> "start" hook
>> 2013-10-09 14:20:57 INFO juju.worker.uniter uniter.go:387 committed
>> "start" hook
>> 2013-10-09 14:20:57 DEBUG juju.worker.uniter modes.go:410 ModeStarting
>> exiting
>> 2013-10-09 14:20:57 INFO juju.worker.uniter modes.go:408 ModeContinue
>> starting
>> 2013-10-09 14:20:57 INFO juju.worker.uniter modes.go:79 continuing after
>> "start" hook
>> 2013-10-09 14:20:57 DEBUG juju.worker.uniter modes.go:410 ModeContinue
>> exiting
>> 2013-10-09 14:20:57 INFO juju.worker.uniter modes.go:408 ModeAbide
>> starting
>> 2013-10-09 14:20:57 DEBUG juju.worker.uniter.filter filter.go:382 want
>> forced upgrade false
>> 2013-10-09 14:20:57 DEBUG juju.worker.uniter.filter filter.go:486 no new
>> charm event
>>
>>
>>
>> Thanks
>> saurabh.
>>
>> --
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>>
>
>
>
> --
> Saurabh Kumar
>
> (RHCSA,RHCE,RHCVA)
>
>
> System Administrator
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>
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