How to call a local Docker image?

[Forum1877621]

I got this example working: https://dagu.readthedocs.io/en/latest/yaml_format.html#use-host-s-docker-environment

But when I try to call a local Docker image, it tries to pull from Docker Hub and gives an error

Any ideas on how to fix this?

[soujhony]

+1
when i run:
docker run -v /var/run/docker.sock:/var/run/docker.sock -p 2376:2375 bobrik/socat TCP4-LISTEN:2375,fork,reuseaddr UNIX-CONNECT:/var/run/docker.sock

this is the result:
Unable to find image 'bobrik/socat:latest' locally
latest: Pulling from bobrik/socat
docker: [DEPRECATION NOTICE] Docker Image Format v1 and Docker Image manifest version 2, schema 1 support is disabled by default and will be removed in an upcoming release. Suggest the author of docker.io/bobrik/socat:latest to upgrade the image to the OCI Format or Docker Image manifest v2, schema 2. More information at https://docs.docker.com/go/deprecated-image-specs/.

docker --version

Docker version 26.1.4, build 5650f9b

[x4204]

I encountered the same issue when using the docker executor to run a container with a locally built image. The way I get around that is by running a local docker registry instance.

For example, let's say I have an image I want to use that I built on my machine with this command:

docker build --tag custom:v1 .

To make Dagu work with it you follow these steps:

• run a local docker registry instance

docker run -d -p 5000:5000 registry:latest

• tag your image so that you can push it to the local registry

docker image tag custom:v1 127.0.0.1:5000/custom:v1

• push the image to the local registry

docker push 127.0.0.1:5000/custom:v1

• use 127.0.0.1:5000/custom:v1 instead of custom:v1 in your dags

[x4204]

Btw, ideally, there should be a an option to skip image pull here:

dagu/internal/dag/executor/docker.go

Line 60 in 6ce554b

reader, err := cli.ImagePull(ctx, e.image, types.ImagePullOptions{})

Maybe something like this:

 executor:
   type: 'docker'
   config:
     image: 'custom:v1'
+    pull: false

@yohamta let me know what you think about this. I can submit a PR if you're interested

[yohamta]

Hi @x4204, thank you very much for providing the detailed workaround and the great suggestion about the option. This is really helpful. And yes, I would very much appreciate if you could submit a PR for adding the option.