auto-proxy: remove dependency on universal-docker mod, install docker-cli from alpine repo

README.md

@@ -3,10 +3,10 @@
 This mod gives SWAG the ability to auto-detect running containers via labels and automatically enable reverse proxy for them.
 
 ## Requirements:
-- This mod needs the [universal-docker mod](https://github.com/linuxserver/docker-mods/tree/universal-docker) installed and set up with either mapping `docker.sock` or setting the environment variable `DOCKER_HOST=remoteaddress`.
+- This mod needs either mapping `docker.sock` or setting the environment variable `DOCKER_HOST=remoteaddress` (see section below for [security consideration](#security-consideration)).
 - Other containers to be auto-detected and reverse proxied should be in the same [user defined bridge network](https://docs.linuxserver.io/general/swag#docker-networking) as SWAG.
 - Containers to be auto-detected and reverse proxied must have a label `swag=enable` at a minimum.
-- To benefit from curated preset proxy confs we provide, the container name must match the container names that are suggested in our readme examples (ie. `radarr` and not `Radarr-4K`).
+- To benefit from curated preset proxy confs we provide, either the container name must match the container names that are suggested in our readme examples (ie. `radarr` and not `Radarr-4K`), or the `swag_preset_conf` label must be set.
 
 ## Labels:
 - `swag=enable` - required for auto-detection
@@ -21,7 +21,7 @@ This mod gives SWAG the ability to auto-detect running containers via labels and
 - `swag_preset_conf=confname` - *optional* - allows defining a preset conf to use if the container name does not match one (if the conf name is `radarr.subdomain.conf.sample`, set this value to `radarr`). If the container name matches an existing conf, this var will be ignored.
 
 
-In SWAG docker arguments, set an environment variable `DOCKER_MODS=linuxserver/mods:universal-docker|linuxserver/mods:swag-auto-proxy` and either add a volume mapping for `/var/run/docker.sock:/var/run/docker.sock:ro`, or set an environment var `DOCKER_HOST=remoteaddress`.
+In SWAG docker arguments, set an environment variable `DOCKER_MODS=linuxserver/mods:swag-auto-proxy` and either add a volume mapping for `/var/run/docker.sock:/var/run/docker.sock:ro`, or set an environment var `DOCKER_HOST=remoteaddress`.
 
 ## Security Consideration:
 Mapping the `docker.sock`, especially in a publicly accessible container is a security liability. Since this mod only needs read-only access to the docker api, the recommended method is to proxy the `docker.sock` via a solution like [our docker socket proxy](https://github.com/linuxserver/docker-socket-proxy), limit the access, and set `DOCKER_HOST=` to point to the proxy address.

root/etc/s6-overlay/s6-rc.d/init-mod-swag-auto-proxy-add-package/run

@@ -0,0 +1,12 @@
+#!/usr/bin/with-contenv bash
+
+if grep -q "linuxserver/mods:universal-docker" /run/s6/container_environment/DOCKER_MODS; then
+    until [ -f /usr/local/bin/docker ]; do
+        sleep 3
+    done
+    echo "**** Using docker binary from the universal-docker mod ****"
+else
+    echo "**** Adding docker-cli to package install list ****"
+    echo "\
+        docker-cli" >> /mod-repo-packages-to-install.list
+fi

root/etc/s6-overlay/s6-rc.d/init-mod-swag-auto-proxy-add-package/type

@@ -0,0 +1 @@
+oneshot

root/etc/s6-overlay/s6-rc.d/init-mod-swag-auto-proxy-add-package/up

@@ -0,0 +1 @@
+/etc/s6-overlay/s6-rc.d/init-mod-swag-auto-proxy-add-package/run

root/etc/s6-overlay/s6-rc.d/init-mod-swag-auto-proxy-setup/run

@@ -1,7 +1,7 @@
 #!/usr/bin/with-contenv bash
 
 if [ ! -S /var/run/docker.sock ] && [ -z "$DOCKER_HOST" ]; then
-    echo "**** Docker mod not set up properly, skipping SWAG auto-proxy ****"
+    echo "**** Docker service access not set up properly, skipping SWAG auto-proxy, please map either the docker socket or set the DOCKER_HOST var. ****"
     exit 0
 fi