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Erisa / cloudflared-docker

Simple Alpine-built scratch-runtime Dockerfile for cloudflared, with support for multiple architectures.
https://hub.docker.com/r/erisamoe/cloudflared
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Build Dockerfile on Pi OS #2

Closed brenner-tobias closed 2 years ago

brenner-tobias commented 2 years ago

I am trying to build the Dockerfile locally to test some chages. On my Mac it is working fine, unfortunately it is not on Pi OS, I ran into an error:

docker build -t ha-cloudflared . Sending build context to Docker daemon 87.04kB Step 1/17 : ARG GOVERSION=1.17.3 Step 2/17 : FROM --platform=${BUILDPLATFORM} golang:$GOVERSION-alpine AS build` failed to parse platform : "" is an invalid component of "": platform specifier component must match "^[A-Za-z0-9_-]+$": invalid argument

I am not sure if this is a specific problem of your Dockerfile or if this is a general docker build problem, which leads to the variable BUILDPLATFORM being empty.

Any idea?

Erisa commented 2 years ago

Hi! First a quick note that building isn't required unless you feel its necessary, the automatically built erisamoe/cloudflared or ghcr.io/erisa/cloudflared will work on any platform including all Pis.

The error you get is because Docker Buildx is required to build. (https://docs.docker.com/buildx/working-with-buildx/) The correct command would instead be docker buildx build . and if it isn't present you might have to install it.

It works on your Mac because Docker Desktop uses buildx by default :)

Erisa commented 2 years ago

Ignore the close, pressed "Close with comment" by accident while trying to select text on my phone haha

brenner-tobias commented 2 years ago

Thanks a lot for your super fast and detailed response. I know that running your built container works, I am just thinking about modifying the Dockerfile to be used as an Home Assistant Add-On at some point.

Regarding the command thanks for the clarification. I actually already tried docker buildx build . as well, but I ran into another problem, since Docker is for some reason not able to fetch the apk packages:

[build 3/5] RUN apk --no-cache add git build-base:

6 0.673 fetch https://dl-cdn.alpinelinux.org/alpine/v3.14/main/armv7/APKINDEX.tar.gz

6 0.735 WARNING: Ignoring https://dl-cdn.alpinelinux.org/alpine/v3.14/main: temporary error (try again later)

6 0.735 fetch https://dl-cdn.alpinelinux.org/alpine/v3.14/community/armv7/APKINDEX.tar.gz

6 0.737 WARNING: Ignoring https://dl-cdn.alpinelinux.org/alpine/v3.14/community: temporary error (try again later)

6 0.737 ERROR: unable to select packages:

6 0.739 build-base (no such package):

6 0.739 required by: world[build-base]

6 0.739 git (no such package):

6 0.739 required by: world[git]

Since this looks like an issue with my build not having a proper connection to the packages and not related to your development at all, I will close this ticket and do some research on this.

Thanks a lot in advance for your help.

P.S. If you are interested in Home Assistant, I would be happy to work on the add-on together, though I am still in a super early stage...

Erisa commented 2 years ago

That does indeed look like an environment issue! If i were me I'd try running an interactive container (docker run -it alpine) and debug from there.

Unfortunately I have no interest in Home Assistant, but I'm happy you're making something great and I'd love to see how it goes!