Correct various bugs on circus, in particular in passing env variables

Dockerfile

@@ -7,9 +7,10 @@ ENV BACKUPPC_XS_VERSION 0.57
 ENV RSYNC_BPC_VERSION 3.0.9.12
 ENV PAR2_VERSION v0.8.0
 
-RUN apk --no-cache --update add python3 rsync perl perl-archive-zip perl-xml-rss perl-cgi perl-file-listing expat samba-client iputils openssh openssl rrdtool msmtp lighttpd lighttpd-mod_auth gzip apache2-utils tzdata libstdc++ libgomp shadow \
+# Install backuppc runtime dependencies
+RUN apk --no-cache --update add python3 rsync bash perl perl-archive-zip perl-xml-rss perl-cgi perl-file-listing expat samba-client iputils openssh openssl rrdtool msmtp lighttpd lighttpd-mod_auth gzip apache2-utils tzdata libstdc++ libgomp shadow \
 # Install backuppc build dependencies
- && apk --no-cache --update --virtual build-dependencies add gcc g++ libgcc autoconf automake make git patch perl-dev expat-dev curl wget \
+ && apk --no-cache --update --virtual build-dependencies add gcc g++ libgcc linux-headers autoconf automake make git patch perl-dev python3-dev expat-dev curl wget \
 # Install supervisor
  && python3 -m ensurepip \
  && pip3 install --upgrade pip circus \
@@ -32,21 +33,24 @@ RUN apk --no-cache --update add python3 rsync perl perl-archive-zip perl-xml-rss
 # Get BackupPC, it will be installed at runtime to allow dynamic upgrade of existing config/pool
  && curl -o /root/BackupPC-$BACKUPPC_VERSION.tar.gz -L https://github.com/backuppc/backuppc/releases/download/$BACKUPPC_VERSION/BackupPC-$BACKUPPC_VERSION.tar.gz \
 # Prepare backuppc home
- && mkdir -p /home/backuppc \
-# Mark the docker as not runned yet, to allow entrypoint to do its stuff
+ && mkdir -p /home/backuppc && cd /home/backuppc \
+# Mark the docker as not run yet, to allow entrypoint to do its stuff
  && touch /firstrun \
 # Clean
  && rm -rf /root/backuppc-xs /root/rsync-bpc /root/par2cmdline \
  && apk del build-dependencies
 
 COPY files/lighttpd.conf /etc/lighttpd/lighttpd.conf
 COPY files/entrypoint.sh /entrypoint.sh
+COPY files/run.sh /run.sh
 COPY files/circus.ini /etc/circus.ini
 
 EXPOSE 8080
 
+WORKDIR /home/backuppc
+
 VOLUME ["/etc/backuppc", "/home/backuppc", "/data/backuppc"]
 
 ENTRYPOINT ["/entrypoint.sh"]
 
-CMD ["/usr/bin/circusd", "/etc/circus.ini"]
+CMD ["/run.sh"]

files/circus.ini

@@ -3,6 +3,7 @@ endpoint = ipc:///var/circus/endpoint
 pubsub_endpoint = ipc:///var/circus/pubsub
 statsd = False
 httpd = False
+working_dir = /home/backuppc
 
 [watcher:lighttpd]
 cmd = /usr/sbin/lighttpd -f /etc/lighttpd/lighttpd.conf -D
@@ -12,4 +13,10 @@ stderr_stream.class = FancyStdoutStream
 [watcher:backuppc]
 cmd = /usr/local/BackupPC/bin/BackupPC
 stdout_stream.class = FancyStdoutStream
-stderr_stream.class = FancyStdoutStream
+stderr_stream.class = FancyStdoutStream
+uid = $(circus.env.backuppc_uuid)
+gid = $(circus.env.backuppc_guid)
+
+[env:lighttpd]
+BACKUPPC_USERNAME = $BACKUPPC_USERNAME
+BACKUPPC_GROUPNAME = $BACKUPPC_GROUPNAME

files/entrypoint.sh

@@ -1,8 +1,10 @@
 #!/bin/sh
 set -e
 
-BACKUPPC_USERNAME=`getent passwd "${BACKUPPC_UUID:-1000}" | cut -d: -f1`
-BACKUPPC_GROUPNAME=`getent group "${BACKUPPC_GUID:-1000}" | cut -d: -f1`
+BACKUPPC_UUID="${BACKUPPC_UUID:-1000}"
+BACKUPPC_GUID="${BACKUPPC_GUID:-1000}"
+BACKUPPC_USERNAME=`getent passwd "$BACKUPPC_UUID" | cut -d: -f1`
+BACKUPPC_GROUPNAME=`getent group "$BACKUPPC_GUID" | cut -d: -f1`
 
 if [ -f /firstrun ]; then
 	echo 'First run of the container. BackupPC will be installed.'
@@ -15,11 +17,11 @@ if [ -f /firstrun ]; then
 
 	# Create backuppc user/group if needed
 	if [ -z "$BACKUPPC_GROUPNAME" ]; then
-		groupadd -r -g "${BACKUPPC_GUID:-1000}" backuppc
+		groupadd -r -g "$BACKUPPC_GUID" backuppc
 		BACKUPPC_GROUPNAME="backuppc"
 	fi
 	if [ -z "$BACKUPPC_USERNAME" ]; then
-		useradd -r -d /home/backuppc -g "${BACKUPPC_GUID:-1000}" -u ${BACKUPPC_UUID:-1000} -M -N backuppc
+		useradd -r -d /home/backuppc -g "$BACKUPPC_GUID" -u "$BACKUPPC_UUID" -M -N backuppc
 		BACKUPPC_USERNAME="backuppc"
 	else
 		usermod -d /home/backuppc "$BACKUPPC_USERNAME"
@@ -92,8 +94,14 @@ if [ -f /firstrun ]; then
 	rm -rf /root/BackupPC-$BACKUPPC_VERSION.tar.gz /root/BackupPC-$BACKUPPC_VERSION /firstrun
 fi
 
+export BACKUPPC_UUID
+export BACKUPPC_GUID
 export BACKUPPC_USERNAME
 export BACKUPPC_GROUPNAME
 
+# Executable bzip2 seems to have been moved into /usr/bin in latest Alpine version. Fix that.
+ln -s /usr/bin/bzip2 /bin/bzip2
+
 # Exec given CMD in Dockerfile
+cd /home/backuppc
 exec "$@"

files/run.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# Ensure directory and necessary sockets exists
+mkdir -p /var/circus
+touch /var/circus/endpoint /var/circus/pubsub /var/circus/stats
+
+# Launch circus
+/usr/bin/circusd /etc/circus.ini