Caddy Quadlet help

[EphemeralDev]

I'm trying to build caddy with a dns plugin so i can use lets encrypt. My quadlet setup is nearly the same as yours except the dns plugin used.

The problem seems to be that when starting caddy, it looks for a localhost registry but cannot find one/will not trigger the build. Do you know of a way around this? It appears to work if i manually run a build and then start caddy though.

## Containerfile
FROM docker.io/caddy:builder-alpine AS builder

RUN xcaddy build \
    --with github.com/caddy-dns/acmedns

FROM docker.io/caddy:latest

COPY --from=builder /usr/bin/caddy /usr/bin/caddy

## caddy.build
[Build]
ImageTag=localhost/caddy-acmedns
SetWorkingDirectory=unit

## caddy.container
[Unit]
Description=Reverse proxy

[Service]
Restart=on-failure

[Install]
WantedBy=default.target

[Container]
Image=caddy.build
ContainerName=caddy
HostName=caddy

PublishPort=8080:80
PublishPort=8443:443
PublishPort=8443:443/udp

Volume=caddy-config:/config
Volume=caddy-data:/data

Volume=./Caddyfile:/etc/caddy/Caddyfile:ro

[EphemeralDev]

Answering my own question after more googling. Quadlet support of .build options were merged in 5.2.0. Therefore, must wait for the release of Ubuntu 25.04 (plucky) which as of this post appears to have Podman 5.3.2. To clarify, manually running a build for the custom caddy will allow the quadlet to work.

[redbeardymcgee]

Hey, I'm so sorry for not getting back to you. I've been busy with local organizing efforts and just so much work at work that this slipped by me.

I think I may have cheated my way around this by mistake because I build a newer podman from source. I was looking at socket activation for caddy a couple months back, which is why that hanging note is by the caddy task in the readme. Glad you got it figured out, and hope it wasn't too much trouble to find.

In fairness, I almost certainly would have forgotten this anyway and we'd be chasing ghosts in the machine.

[EphemeralDev]

No problem, thanks for checking back. You've reminded me that I should add a clarification to my answer. Wasn't too much trouble, but I did do a bit of experimenting/searching. Hopefully helps anyone who may stumble across this.