Cannot deploy CAP application to Kyma runtime as packing docker image fails

[gabbi]

Hi experts,

I'm following the tutorial Deploy Your CAP Application to Kyma. In step 4 "Build CAP Service" I should run the command to pack the docker image and upload it to the container registry. Unfortunately this fails with following error:

ERROR: failed to build: downloading buildpack: extracting from registry 'gcr.io/paketo-buildpacks/nodejs': fetching image: error pulling image configuration: download failed after attempts=6: x509: certificate signed by unknown authority

I have a fresh Docker Desktop (no images available before executing the command).

So, how can I solve this?

regards

René

[gabbi]

Hi Rene,

Are you tryng the command when behind a corporate proxy?

BR

Gaurav

[renejurmann]

Hi gabbi ,

no, I'm not behind a corporate proxy. In the meantime I tried to remove the part "gcr.io" from the buildpack name. So the command I execute is following:

pack build $CONTAINER_REGISTRY/cpapp-srv --path gen/srv --buildpack paketo-buildpacks/nodejs --builder paketobuildpacks/builder-jammy-base --env BP_NODE_RUN_SCRIPTS=""

Now, another error is displayed:

ERROR: failed to initialize analyzer: getting previous image: verifying image "https://index.docker.io/v1/cpapp-srv": Error response from daemon: invalid reference format
ERROR: failed to build: executing lifecycle. This may be the result of using an untrusted builder: failed with status code: 1

As you can see, I use Docker Hub as container registry. Basically the registry URL as added to the Docker config.json is "https://index.docker.io/v1/". But I created a repository in Docker Hub called
"<myUserName>/kyma"

But unimportant if I user "https://index.docker.io/v1/" or "https://index.docker.io/v1/<myUserName>/kyma" as container registry URL I get the same analyzer error (when removing "gcr.io" from the buildpack name).

Within the Docker desktop I can see that a volume for the cpapp-srv was created but no image.

regards

René

[renejurmann · Accepted solution]

Hi all,

I found a solution:

As I use Docker Hub I executed following commands in the bash:

$CONTAINER_REGISTRY=docker.io/<My Docker User Name>

pack build $CONTAINER_REGISTRY/cpapp-srv --path gen/srv \
--buildpack paketo-buildpacks/nodejs \
--builder paketobuildpacks/builder-jammy-base \
--env BP_NODE_RUN_SCRIPTS=""

Executing these commands successfully created the Docker image.

So, in comparison to the tutorial I left out the "gcr.io/" from the nodejs buildpack and I used a container registry URL different than in my Docker config.json. (It should only be the domain of the URL in the config json and the user name must be added as path)

I don't know if this can be used for other container registries as well (Google/gcr.io, GitHub/ghcr.io, ...)