Examples?

[jfmatth]

This project may be what I've been looking for, but ... there don't seem to be any examples for the various buildpacks.

Can we get a Python one posted? I'm happy to help build a repo for this, but honestly don't know what is required for Kubero to work ?

Any help is appreciated :)

[mms-gianni]

I am more than happy to help.

There are 2 strategies to deploy your code: git (with the build packs) and docker (prebuilt images)

Git strategy:
Buildpacks may be a bit misleading since it has nothing in common with buildpacks.io . Buildpacks are just a set of 3 containers. Those containers use the official images and don't need any maintenance.

1. fetch : you regularly don't want to replace this one, since it just fetches your code with a git checkout
2. build : this container does your "pip install"
3. run : this container mounts the volume with the build application in step 2 in read-only mode and is your remaining container.

Here is a plain Python example with docker-compose to explain those 3 steps. Kubero uses the same technique with deployments and pods.
https://github.com/kubero-dev/buildpacks/blob/main/packs/python/docker-compose.yaml

This git strategy is very fast. But it does not scale very well and becomes more inefficient with every additional container.

Docker(prebuilt) strategy;
This strategy scales better and is more the traditional way to deploy a code. In this strategy, you don't have these 3 steps. You will need to build your image in your classic CI/CD process (Github Actions for example) .
(build Dockerimage ->push to registry -> pull in Kubernetes)

[jfmatth]

Tried again this AM, with more information

Built a pipeline called home, with an app pythontest. it fails on 'init'ing the container, see below

NAME                                            READY   STATUS                  RESTARTS      AGE
pod/pythontest-kuberoapp-web-5c749f8cb4-zzvzx   0/1     Init:CrashLoopBackOff   4 (86s ago)   3m32s

NAME                           TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)   AGE
service/pythontest-kuberoapp   ClusterIP   10.43.240.115   <none>        80/TCP    3m32s

NAME                                          READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/pythontest-kuberoapp-web      0/1     1            0           3m32s
deployment.apps/pythontest-kuberoapp-worker   0/0     0            0           3m32s

NAME                                                     DESIRED   CURRENT   READY   AGE
replicaset.apps/pythontest-kuberoapp-web-5c749f8cb4      1         1         0       3m32s
replicaset.apps/pythontest-kuberoapp-worker-58f4c58764   0         0         0       3m32s
jfmatth@jfmatth-gaming:~$ k logs -n home-test pod/pythontest-kuberoapp-web-5c749f8cb4-zzvzx
Defaulted container "kuberoapp-web" out of: kuberoapp-web, kuberoapp-fetcher (init), kuberoapp-builder (init)
Error from server (BadRequest): container "kuberoapp-web" in pod "pythontest-kuberoapp-web-5c749f8cb4-zzvzx" is waiting to start: PodInitializing

Not sure what I'm doing wrong, seems simple enough

[jfmatth]

@mms-gianni

Thanks for the quick reply.

Yes, my repo didn't reflect the main.py, thought it did.

I'm still unable to get it just past the init phase, which seems odd. Pulling the fetch container failed on the command line too ☹️

docker pull ghcr.io/kubero-dev/buildpacks/fetch:sha256-5625767a9cf9cdb972826b1713f83b4a50f441c8b88ce5eb6f923d81121daee1.sig
Emulate Docker CLI using podman. Create /etc/containers/nodocker to quiet msg.
Trying to pull ghcr.io/kubero-dev/buildpacks/fetch:sha256-5625767a9cf9cdb972826b1713f83b4a50f441c8b88ce5eb6f923d81121daee1.sig...
Getting image source signatures
Copying blob 83b63d88ade9 done
Error: writing blob: adding layer with blob "sha256:83b63d88ade91a8cb899fda9a3b0c2a1a9a9a361f663585905458b7d0528edc1": Error processing tar file(exit status 1): unexpected EOF

[mms-gianni]

To view te logs of the init container you need to add the "-c" flag:
kubectl logs pod/python-kuberoapp-web-7b66b9c6c4-5qxs8 -c kuberoapp-fetcher
and for the builder:
kubectl logs pod/python-kuberoapp-web-7b66b9c6c4-5qxs8 -c kuberoapp-builder

Not able to pull is strange tough ... I need to investigate this.

[jfmatth]

updated the repo online to main.py, still having init errors. I don't know why, what am I missing?

 k logs -n home-test python-kuberoapp-web-688cccf746-b9wjp
Defaulted container "kuberoapp-web" out of: kuberoapp-web, kuberoapp-fetcher (init), kuberoapp-builder (init)
Error from server (BadRequest): container "kuberoapp-web" in pod "python-kuberoapp-web-688cccf746-b9wjp" is waiting to start: PodInitializing
jfmatth@jfmatth-gaming:~/development/kubero/kubero-python$ k get pods -n home-test -w
NAME                                    READY   STATUS       RESTARTS      AGE
python-kuberoapp-web-688cccf746-b9wjp   0/1     Init:Error   2 (20s ago)   33s
python-kuberoapp-web-688cccf746-b9wjp   0/1     Init:CrashLoopBackOff   2 (13s ago)   44s
python-kuberoapp-web-688cccf746-b9wjp   0/1     Init:1/2                3 (26s ago)   57s
python-kuberoapp-web-688cccf746-b9wjp   0/1     Init:Error              3 (29s ago)   60s
python-kuberoapp-web-688cccf746-b9wjp   0/1     Init:CrashLoopBackOff   3 (13s ago)   73s

[jfmatth]

You're logs gave me a clue, looks like i can't read my repo?

jfmatth@jfmatth-gaming:~/development/kubero/kubero-python$ k logs -n home-test python-kuberoapp-web-688cccf746-b9wjp -c kuberoapp-fetcher
========== whipe the app dir
========== Clone Repository from [email protected]:jfmatth/kubero-python.git
Cloning into '.'...
Failed to add the host to the list of known hosts (/root/.ssh/known_hosts).
Load key "/root/.ssh/deploykey": invalid format
[email protected]: Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
fatal: not a git repository (or any parent up to mount point /)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
========== write startupscripts based on Procfile
init-build.sh
init-web.sh
init-worker.sh

is there a way not to use ssh into GH?

[mms-gianni]

Back to the git strategy:
Kubero has a set of preconfigured "buildpacks" here:
https://github.com/kubero-dev/kubero/blob/main/config.yaml#L36-L48

You can extend or replace them in your running kubero config (modify configmap, restart kubero UI container)

And here is the switch to chose between those 2 strategies:

[jfmatth]

this part makes sense, and I just need to know what files would affect the build process.

[mms-gianni]

Same as on Heroku: the Procfile

This is my Python example:
https://github.com/kubero-dev/template-python/blob/main/Procfile

And here how it is processed:
https://github.com/kubero-dev/buildpacks/blob/main/packs/fetch/build/init.sh#L20

[jfmatth]

so far I've determined that since Kubero uses SSH into GH, you'll need a keypair there, but don't see where to add that, hmm. Checking docs now.

i'm also going to update the config to see if i can force the repo to be https for now :)