From: Zdenek Kabelac <zdenek.kabelac@gmail.com>
To: LVM general discussion and development <linux-lvm@redhat.com>,
Abhishek Agarwal <mragarwal.developer@gmail.com>
Subject: Re: [linux-lvm] lvm commands hanging when run from inside a kubernetes pod
Date: Mon, 30 May 2022 17:15:03 +0200 [thread overview]
Message-ID: <e1896ba1-fc6f-b4f1-d4f9-fac91193dcbc@gmail.com> (raw)
In-Reply-To: <CAM3OQJGWsYo=boQBHqmLj1HRRtg14p3-Tp3yeu7KMYcKV2_hOA@mail.gmail.com>
Dne 27. 05. 22 v 9:02 Abhishek Agarwal napsal(a):
> When a kubernetes pod is scheduled on the node having lvm2 libraries already
> installed and trying to run lvm commands using those node binaries from inside
> the pod container, the commands hang and are waiting on something to complete.
> Although when ctrl+c is pressed the terminal session resumes and checking the
> final code for the execution returns a "0" error code and the commands
> operation is also carried out successfully.
>
>
lvm2 is *NOT* designed to be executed in/from a container.
It cannot work properly as it directly communicates with system's udevd -
which you likely don't have running in your container.
You could kind of 'fake it' by running lvm2 wihout udev synchronization - but
this will just open another cave of other problems (missing synchronization).
So your lvm2 command should be always executed on your hosting machine
(since it does control resources without containerization support - like
devices) and then you should 'pass' created LV to your container in some way.
Regards
Zdenek
_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://listman.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
WARNING: multiple messages have this Message-ID (diff)
From: Zdenek Kabelac <zdenek.kabelac@gmail.com>
To: linux-lvm@redhat.com
Subject: Re: [linux-lvm] lvm commands hanging when run from inside a kubernetes pod
Date: Mon, 30 May 2022 17:15:03 +0200 [thread overview]
Message-ID: <e1896ba1-fc6f-b4f1-d4f9-fac91193dcbc@gmail.com> (raw)
Message-ID: <20220530151503.UdV8qWHb2jhcXV1ATqMdACiklJeuFLhOpTONjy3G0wI@z> (raw)
In-Reply-To: <CAM3OQJGWsYo=boQBHqmLj1HRRtg14p3-Tp3yeu7KMYcKV2_hOA@mail.gmail.com>
Dne 27. 05. 22 v 9:02 Abhishek Agarwal napsal(a):
> When a kubernetes pod is scheduled on the node having lvm2 libraries already
> installed and trying to run lvm commands using those node binaries from inside
> the pod container, the commands hang and are waiting on something to complete.
> Although when ctrl+c is pressed the terminal session resumes and checking the
> final code for the execution returns a "0" error code and the commands
> operation is also carried out successfully.
>
>
lvm2 is *NOT* designed to be executed in/from a container.
It cannot work properly as it directly communicates with system's udevd -
which you likely don't have running in your container.
You could kind of 'fake it' by running lvm2 wihout udev synchronization - but
this will just open another cave of other problems (missing synchronization).
So your lvm2 command should be always executed on your hosting machine
(since it does control resources without containerization support - like
devices) and then you should 'pass' created LV to your container in some way.
Regards
Zdenek
_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://listman.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
next prev parent reply other threads:[~2022-05-30 15:15 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-27 7:02 [linux-lvm] lvm commands hanging when run from inside a kubernetes pod Abhishek Agarwal
2022-05-30 11:55 ` Roger Heflin
2022-05-31 18:50 ` Abhishek Agarwal
2022-06-01 7:26 ` Demi Marie Obenour
2022-06-01 8:28 ` Abhishek Agarwal
2022-06-02 11:04 ` Roger Heflin
2022-06-06 5:49 ` Abhishek Agarwal
2022-06-06 7:01 ` Demi Marie Obenour
2022-06-06 11:31 ` Abhishek Agarwal
2022-06-07 17:42 ` Demi Marie Obenour
2022-06-06 7:02 ` Bernd Eckenfels
2022-06-02 19:00 ` Nir Soffer
2022-05-30 15:15 ` Zdenek Kabelac [this message]
2022-05-30 15:15 ` Zdenek Kabelac
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