Need help directing Cron Job to an app

[quintman]

Hi all, fairly new Truenas SCALE user, looking for some Cron help!

I have an app, Photoprism, that I would like to run a Cron job on each night. I've found some examples online which do what I'd like:

"docker exec -ti photoprism photoprism index —cleanup"

However this command doesn't work when I try to setup a Cron job through the GUI. I'm guessing it's something to do with Scale not actually using docker but Kubernetes? from what I can gather, I may need to edit the first photoprism to point to the correct app (or container?) but I just don't know what I'm looking for.

For reference, if I go to Apps, open the photoprism App Shell and type "photoprism index --cleanup" it does exactly what I want.

Thank you!

 

[sretalla]

Maybe you need some information like this:

accessing a container from the cli?

Hi all. I was wondering how one would go about accessing a container via the cli if logged in via ssh? Is there a cubernetes command for this? or some other method? Thanks.

www.truenas.com

 

[quintman]

Maybe you need some information like this:

accessing a container from the cli?

Hi all. I was wondering how one would go about accessing a container via the cli if logged in via ssh? Is there a cubernetes command for this? or some other method? Thanks.

www.truenas.com

Hi thanks for this. I read an understood. came up with the following:
"k3s kubectl exec -n ix-photoprism --stdin --tty photoprism-66976f989b-4b6tr -- /bin/sh"

if I enter this in Truenas she'll, I can then enter my command "photoprism index --cleanup" it runs perfectly. I however still cannot figure out how to enter this into the Cron GUI? Is there any further guidance?
I tried this as my Cron command: "k3s kubectl exec -n ix-photoprism --stdin --tty photoprism-66976f989b-4b6tr -- /bin/sh | photoprism index --cleanup" but get the attached error.

 

[quintman]

Maybe you need some information like this:

accessing a container from the cli?

Hi all. I was wondering how one would go about accessing a container via the cli if logged in via ssh? Is there a cubernetes command for this? or some other method? Thanks.

www.truenas.com

Ah please disregard my last post! some further reading, I just needed to remove the /bin/sh | from my line and all working. thank you!

 

[quintman]

Maybe you need some information like this:

accessing a container from the cli?

Hi all. I was wondering how one would go about accessing a container via the cli if logged in via ssh? Is there a cubernetes command for this? or some other method? Thanks.

www.truenas.com

Sorry have one further question. I have the following command that can run successfully as a Truenas cronjob:
"k3s kubectl exec -n ix-photoprism --stdin --tty photoprism-66976f989b-4b6tr -- photoprism index --cleanup"

However, I didn't realise that the pod name with kubernetes changes every time you stop and start an app (eg. a server restart). I had a restart, then my job failed. Then I noticed the string photoprism-66976f989b-4b6tr had changed. Is there anyway around this? It seems all the docker examples i can find only go to the container, not the specific pod, so its hard to find comparison. Some search has led that there is no way to fix a pod name.

 

[sretalla]

This will probably do it... you may need to mess with it a bit to get the right namespace with the first grep if you have multiple photoprism apps:

k3s kubectl get namespaces -o name | grep photoprism | sed -r "s/namespace\///g" | xargs -I{} k3s kubectl get -o name -n {} pods | sed -r "s/pod\///g" | xargs -I{} k3s kubectl exec -n ix-photoprism --stdin --tty {} -- photoprism index --cleanup

 

[sretalla]

Actually I see you're already fixed on the namespace, so we can shorten it a lot:

k3s kubectl get -o name -n ix-photoprism pods | sed -r "s/pod\///g" | xargs -I{} k3s kubectl exec -n ix-photoprism --stdin --tty {} -- photoprism index --cleanup

 

[Isma]

Actually I see you're already fixed on the namespace, so we can shorten it a lot:

k3s kubectl get -o name -n ix-photoprism pods | sed -r "s/pod\///g" | xargs -I{} k3s kubectl exec -n ix-photoprism --stdin --tty {} -- photoprism index --cleanup

Could this command be adapted to the nextcloud cron? we have a discussion for cobia beta.1

Cron in nextcloud Scale Cobia Beta.1

Hello, I understand that there were modifications and I don't know how to change docker to kuber but I would like to see how to configure the cron for nextcloud for this new version of scale beta.1 In scale 22 use this reference...

www.truenas.com

 

[quintman]

Could this command be adapted to the nextcloud cron? we have a discussion for cobia beta.1

Cron in nextcloud Scale Cobia Beta.1

Hello, I understand that there were modifications and I don't know how to change docker to kuber but I would like to see how to configure the cron for nextcloud for this new version of scale beta.1 In scale 22 use this reference...

www.truenas.com

Just read your thread. In my case, i had to remove the "/bin/bash" (and maybe in your case "root -c" as well) to get rid of the error you are seeing.

 

[Isma]

Just read your thread. In my case, i had to remove the "/bin/bash" (and maybe in your case "root -c" as well) to get rid of the error you are seeing.

error in both cases

 

[dain]

A much simpler way to get the running pod name is using `kubectl` itself like:

Code:

k3s kubectl exec -n ix-photoprism `k3s kubectl -n ix-photoprism get pod -o name --field-selector=status.phase==Running` -- photoprism index --cleanup

 

[sretalla]

A much simpler way to get the running pod name is using `kubectl` itself

I don't know if I'd say simpler, but I'll certainly agree better.