2:44 a.m.
Hi, is it possible to run health check on a container from another container in same pod?
--
Michael Ivanov
2:49 a.m.
Thanks for reaching out, Michael.
On Tue, Nov 21, 2023 at 9:45 AM Михаил Иванов <ivans(a)isle.spb.ru> wrote:
Hi, is it possible to run health check on a container from another
container in same pod?
The answer is probably no, but I want to make sure to understand your use
case. Can you elaborate on it in more detail?
--
Michael Ivanov
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8:33 a.m.
Hallo Valentin, the actual case is to wait until oracle container
is in healthy state and only then allow to access it from the other
container. Currently I loop on oracle container health check before
running the second container. This approach is possible when I run
containers from shell script, but probably will not work in eg. kubernetes.
Rgrds,
On 21.11.2023 11:49, Valentin Rothberg wrote:
Thanks for reaching out, Michael.
On Tue, Nov 21, 2023 at 9:45 AM Михаил Иванов <ivans(a)isle.spb.ru> wrote:
Hi, is it possible to run health check on a container from another container in same
pod?
The answer is probably no, but I want to make sure to understand your
use case. Can you elaborate on it in more detail?
--
Michael Ivanov
_______________________________________________
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8:39 a.m.
On 11/21/23 09:33, Михаил Иванов wrote:
Hallo Valentin, the actual case is to wait until oracle container
is in healthy state and only then allow to access it from the other
container. Currently I loop on oracle container health check before
running the second container. This approach is possible when I run
containers from shell script, but probably will not work in eg. kubernetes.
Rgrds,
This sounds exactly like a systemd use case, have you investigated using
quadlet for this?
On 21.11.2023 11:49, Valentin Rothberg wrote:
> Thanks for reaching out, Michael.
>
> On Tue, Nov 21, 2023 at 9:45 AM Михаил Иванов <ivans(a)isle.spb.ru> wrote:
>
> Hi, is it possible to run health check on a container from another container in
same pod?
>
>
> The answer is probably no, but I want to make sure to understand your
> use case. Can you elaborate on it in more detail?
>
> --
>
> Michael Ivanov
>
> _______________________________________________
> Podman mailing list -- podman(a)lists.podman.io
> To unsubscribe send an email to podman-leave(a)lists.podman.io
>
>
> _______________________________________________
> Podman mailing list --podman(a)lists.podman.io
> To unsubscribe send an email topodman-leave(a)lists.podman.io
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3:54 a.m.
Hallo Daniels, thanks for the advice. I tried to run the pod using quadlet,
but I hit the same problem. It seems that when started under quadlet all
containers, belonging to the pod are started up without checking whether
the other containers are already in healthy state or not.
Is there a way to specify container dependencies inside podman/kubernetes pod?
I don't like to run oracle in a separate container and define dependencies
using systemd After/Require options. I prefer to keep oracle container in
single pod with application, so that it is not necessary to map oracle port
to different value for each application.
Best regards,
--
Michael Ivanov
On 21.11.2023 17:39, Daniel Walsh wrote:
On 11/21/23 09:33, Михаил Иванов wrote:
> Hallo Valentin, the actual case is to wait until oracle container
> is in healthy state and only then allow to access it from the other
> container. Currently I loop on oracle container health check before
> running the second container. This approach is possible when I run
> containers from shell script, but probably will not work in eg. kubernetes.
> Rgrds,
This sounds exactly like a systemd use case, have you investigated
using quadlet for this?
> On 21.11.2023 11:49, Valentin Rothberg wrote:
>> Thanks for reaching out, Michael.
>>
>> On Tue, Nov 21, 2023 at 9:45 AM Михаил Иванов <ivans(a)isle.spb.ru> wrote:
>>
>> Hi, is it possible to run health check on a container from another container
in same pod?
>>
>>
>> The answer is probably no, but I want to make sure to understand
>> your use case. Can you elaborate on it in more detail?
>>
>> --
>>
>> Michael Ivanov
>>
>> _______________________________________________
>> Podman mailing list -- podman(a)lists.podman.io
>> To unsubscribe send an email to podman-leave(a)lists.podman.io
>>
>>
>> _______________________________________________
>> Podman mailing list --podman(a)lists.podman.io
>> To unsubscribe send an email topodman-leave(a)lists.podman.io
>
> _______________________________________________
> Podman mailing list --podman(a)lists.podman.io
> To unsubscribe send an email topodman-leave(a)lists.podman.io
_______________________________________________
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3:10 a.m.
For example, you can define a custom /health API for this.
In this API you can call and process health results from another hosts you
are integrating with.
С уважением, А. И.
вт, 21 нояб. 2023 г., 11:45 Михаил Иванов <ivans(a)isle.spb.ru>:
Hi, is it possible to run health check on a container from another
container in same pod?
--
Michael Ivanov
_______________________________________________
Podman mailing list -- podman(a)lists.podman.io
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3:48 a.m.
On Tue, Nov 21, 2023 at 10:12 AM Александр Илюшкин <ailjushkin(a)gmail.com>
wrote:
For example, you can define a custom /health API for this.
In this API you can call and process health results from another hosts you
are integrating with.
Can you describe the use case? I don't yet fully understand what you want
to do. I am a bit confused as you first mentioned "another container in
the same pod" and now mention "another host".
Kind regards,
Valentin
С уважением, А. И.
вт, 21 нояб. 2023 г., 11:45 Михаил Иванов <ivans(a)isle.spb.ru>:
> Hi, is it possible to run health check on a container from another container in same
pod?
>
> --
>
> Michael Ivanov
>
> _______________________________________________
> Podman mailing list -- podman(a)lists.podman.io
> To unsubscribe send an email to podman-leave(a)lists.podman.io
>
_______________________________________________
Podman mailing list -- podman(a)lists.podman.io
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4:22 a.m.
I apologize if I misunderstood the question. I thought about something
like this.
вт, 21 нояб. 2023 г. в 12:49, Valentin Rothberg <vrothberg(a)redhat.com>:
On Tue, Nov 21, 2023 at 10:12 AM Александр Илюшкин <ailjushkin(a)gmail.com> wrote:
>
> For example, you can define a custom /health API for this.
>
> In this API you can call and process health results from another hosts you are
integrating with.
Can you describe the use case? I don't yet fully understand what you want to do. I
am a bit confused as you first mentioned "another container in the same pod" and
now mention "another host".
Kind regards,
Valentin
>
> С уважением, А. И.
>
> вт, 21 нояб. 2023 г., 11:45 Михаил Иванов <ivans(a)isle.spb.ru>:
>>
>> Hi, is it possible to run health check on a container from another container in
same pod?
>>
>> --
>>
>> Michael Ivanov
>>
>> _______________________________________________
>> Podman mailing list -- podman(a)lists.podman.io
>> To unsubscribe send an email to podman-leave(a)lists.podman.io
>
> _______________________________________________
> Podman mailing list -- podman(a)lists.podman.io
> To unsubscribe send an email to podman-leave(a)lists.podman.io
--
С уважением,
А.И.
6:05 a.m.
On Tue, Nov 21, 2023 at 11:23 AM Александр Илюшкин <ailjushkin(a)gmail.com>
wrote:
I apologize if I misunderstood the question. I thought about
something
like this.
Thanks! I'd prefer a text explanation as I still need to interpret the
sketch. As far as I read it, something should be blocking on the health
state of another container.
So it's not possible for one container to know the health state of another
container. That knowledge must either be implemented in the application
logic *inside* the container (e.g., ping a server) or be used outside the
containers, for instance, by moving the containers into systemd units which
will only mark the unit as ready when the health check fired.
вт, 21 нояб. 2023 г. в 12:49, Valentin Rothberg
<vrothberg(a)redhat.com>:
>
> On Tue, Nov 21, 2023 at 10:12 AM Александр Илюшкин <ailjushkin(a)gmail.com>
wrote:
>>
>> For example, you can define a custom /health API for this.
>>
>> In this API you can call and process health results from another hosts
you are integrating with.
>
>
> Can you describe the use case? I don't yet fully understand what you
want to do. I am a bit confused as you first mentioned "another container
in the same pod" and now mention "another host".
>
> Kind regards,
> Valentin
>
>>
>> С уважением, А. И.
>>
>> вт, 21 нояб. 2023 г., 11:45 Михаил Иванов <ivans(a)isle.spb.ru>:
>>>
>>> Hi, is it possible to run health check on a container from another
container in same pod?
>>>
>>> --
>>>
>>> Michael Ivanov
>>>
>>> _______________________________________________
>>> Podman mailing list -- podman(a)lists.podman.io
>>> To unsubscribe send an email to podman-leave(a)lists.podman.io
>>
>> _______________________________________________
>> Podman mailing list -- podman(a)lists.podman.io
>> To unsubscribe send an email to podman-leave(a)lists.podman.io
--
С уважением,
А.И.
7:31 a.m.
At least I tried, Valentin 😅
Yes, your interpretation is correct.
That was interesting to learn about the systemd approach.
С уважением, А. И.
вт, 21 нояб. 2023 г., 15:05 Valentin Rothberg <vrothberg(a)redhat.com>:
On Tue, Nov 21, 2023 at 11:23 AM Александр Илюшкин
<ailjushkin(a)gmail.com>
wrote:
> I apologize if I misunderstood the question. I thought about something
> like this.
>
Thanks! I'd prefer a text explanation as I still need to interpret the
sketch. As far as I read it, something should be blocking on the health
state of another container.
So it's not possible for one container to know the health state of another
container. That knowledge must either be implemented in the application
logic *inside* the container (e.g., ping a server) or be used outside the
containers, for instance, by moving the containers into systemd units which
will only mark the unit as ready when the health check fired.
> вт, 21 нояб. 2023 г. в 12:49, Valentin Rothberg <vrothberg(a)redhat.com>:
> >
> > On Tue, Nov 21, 2023 at 10:12 AM Александр Илюшкин <
> ailjushkin(a)gmail.com> wrote:
> >>
> >> For example, you can define a custom /health API for this.
> >>
> >> In this API you can call and process health results from another hosts
> you are integrating with.
> >
> >
> > Can you describe the use case? I don't yet fully understand what you
> want to do. I am a bit confused as you first mentioned "another container
> in the same pod" and now mention "another host".
> >
> > Kind regards,
> > Valentin
> >
> >>
> >> С уважением, А. И.
> >>
> >> вт, 21 нояб. 2023 г., 11:45 Михаил Иванов <ivans(a)isle.spb.ru>:
> >>>
> >>> Hi, is it possible to run health check on a container from another
> container in same pod?
> >>>
> >>> --
> >>>
> >>> Michael Ivanov
> >>>
> >>> _______________________________________________
> >>> Podman mailing list -- podman(a)lists.podman.io
> >>> To unsubscribe send an email to podman-leave(a)lists.podman.io
> >>
> >> _______________________________________________
> >> Podman mailing list -- podman(a)lists.podman.io
> >> To unsubscribe send an email to podman-leave(a)lists.podman.io
>
>
>
> --
> С уважением,
> А.И.
>
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participants (4)
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Александр Илюшкин -
Михаил Иванов