Updating one-click-apps when template build docker container?

[adamshand]

Hello,

Still wrapping my head around how CapRover does updates in some instances. In the below template file, the Pocketbase container is built using a Dockerfile.

If you used this template to install Pocketbase, how would you update it to a newer version later? There's no Docker Hub image to reference?

I assume you'd use method 4 or 5 and adapt the template to an actual Dockerfile or captain-definition?

Which is easy enough but seems annoying to do for every update?

Am I missing something or is the better solution (in this specific case) to update the template to use a prebuilt image?

Thanks!
Adam.

services:
    '$$cap_appname':
        caproverExtra:
            dockerfileLines:
                - FROM alpine:3.16.2
                - RUN apk add --no-cache unzip openssh
                - ADD https://github.com/pocketbase/pocketbase/releases/download/v$$cap_version/pocketbase_$$cap_version_$$cap_architecture.zip /tmp/pb.zip
                - RUN unzip /tmp/pb.zip -d /pb/
                - EXPOSE 8080
                - CMD ["/pb/pocketbase", "serve", "--http=0.0.0.0:8080"]
            containerHttpPort: '8080'
        volumes:
            - '$$cap_appname-data:/pb'

[githubsaturn]

You're 100% correct.

Dockerfile lines are generally annoying to update. And there are two reasons why they are used:

1. To override CMD
   CapRover doesn't currently read the command line in the template, so if a template needs to override that, the only way is to use Dockerfile lines. This is due to the fact that Docker doesn't offer docker compose in their APIs. So we have to fake a docker-compose parser to convert docker-compose syntax to Docker API. It's definitely a highly used flag, so PRs are definitely welcomed!

2. To support apps that don't offer docker images
   Pockerbase is an example. Here is an open thread: Add official dockerhub image pocketbase/pocketbase#92
   It's actually quite simple to set this up, I'm not sure why they haven't invested on this yet.

For this second issue, there is really nothing that we can do on CapRover to prevent this issue.

[adamshand]

Thanks for the info! There's a good, community maintained image for Pocketbase. I'll submit an PR to the Pocketbase template to use that.