allowing for runtime config of puid & pgid

Dockerfile

@@ -3,21 +3,21 @@ FROM alpine
 LABEL maintainer="Gianluca Gabrielli" mail="[email protected]"
 LABEL description="rTorrent on Alpine Linux, with a better Docker integration."
 LABEL website="https://github.com/TuxMeaLux/alpine-rtorrent"
-LABEL version="1.0"
+LABEL version="1.1"
 
-ARG UGID=666
-
-RUN addgroup -g $UGID rtorrent && \
-    adduser -S -u $UGID -G rtorrent rtorrent && \
-    apk add --no-cache rtorrent && \
+RUN apk upgrade && \
+    apk add --no-cache rtorrent su-exec && \
     mkdir -p /home/rtorrent/rtorrent/config.d && \
-    mkdir /home/rtorrent/rtorrent/.session && \
-    mkdir /home/rtorrent/rtorrent/download && \
-    mkdir /home/rtorrent/rtorrent/watch && \
-    chown -R rtorrent:rtorrent /home/rtorrent/rtorrent
+    mkdir -p /home/rtorrent/rtorrent/.session && \
+    mkdir -p /home/rtorrent/rtorrent/download && \
+    mkdir -p /home/rtorrent/rtorrent/watch && \
+    ln -sf /dev/stdout /var/log/rtorrent-info.log && \
+    ln -sf /dev/stderr /var/log/rtorrent-error.log && \
+    rm -rf /var/cache/apk/*
 
-COPY --chown=rtorrent:rtorrent config.d/ /home/rtorrent/rtorrent/config.d/
-COPY --chown=rtorrent:rtorrent .rtorrent.rc /home/rtorrent/
+COPY config.d/ /home/rtorrent/rtorrent/config.d/
+COPY .rtorrent.rc /home/rtorrent/
+COPY init /
 
 VOLUME /home/rtorrent/rtorrent/.session
 
@@ -26,6 +26,4 @@ EXPOSE 6881
 EXPOSE 6881/udp
 EXPOSE 50000
 
-USER rtorrent
-
-CMD ["rtorrent"]
+CMD ["/init"]

README.md

@@ -46,6 +46,10 @@ If you are looking for a fast way to either run rTorrent and Flood using just on
 
 If it's not your intention to control rTorrent from a third-party application, do not use port ```16891```.
 
+## Environment variables
+- **PUID** : user id (default : 666)
+- **PGID** : group id (defaut : 666)
+
 ## Volumes
 
 There is a volume which maps the directory that rTorrent uses to store session data.
@@ -66,5 +70,5 @@ There are two directories that should be mapped outside the container.
 
 ## Logs
 
-To let rTorrent becomes more docker compliant, I've configured logs to be written on ```/dev/stdout```. In this way, it is possible to catch them with [docker logs](https://docs.docker.com/engine/reference/commandline/logs/).  
+To let rTorrent becomes more docker compliant, I've configured logs to be written on ```/dev/stdout``` & ```/dev/stderr```. In this way, it is possible to catch them with [docker logs](https://docs.docker.com/engine/reference/commandline/logs/).  
 This behavior can be changed editing the [```config.d/01-log.rc```](config.d/01-log.rc) file.

config.d/01-log.rc

@@ -1,6 +1,11 @@
 ## Logging:
 ##   Levels = critical error warn notice info debug
-method.insert = cfg.logfile,  private|const|string, (cat,"/dev/stdout")
-log.open_file = "log", (cfg.logfile)
-log.add_output = "info", "log"
-log.add_output = "torrent_info", "log"
+method.insert = cfg.logs,          private|const|string, (cat,"/var/log/")
+method.insert = cfg.info_logfile,  private|const|string, (cat,(cfg.logs),"rtorrent-info.log")
+method.insert = cfg.error_logfile, private|const|string, (cat,(cfg.logs),"rtorrent-error.log")
+log.open_file = "info-log", (cfg.info_logfile)
+log.add_output = "info", "info-log"
+log.open_file = "error-log", (cfg.error_logfile)
+log.add_output = "critical", "error-log"
+log.add_output = "error", "error-log"
+log.add_output = "warn", "error-log"

init

@@ -0,0 +1,14 @@
+#!/bin/sh
+PUID=${PUID:=666}
+PGID=${PGID:=666}
+
+# chown rTorrent home directory
+chown -R "$PUID:$PGID" /home/rtorrent
+
+chown "$PUID:$PGID" \
+	/var/log/rtorrent-error.log \
+	/var/log/rtorrent-info.log
+
+cd /home/rtorrent
+
+exec su-exec $PUID:$PGID rtorrent -n -o import=/home/rtorrent/.rtorrent.rc