Set /home/postgres/pghoard as a volume

Author: mcanevet

9.5/Dockerfile

@@ -36,12 +36,27 @@ RUN apt-get update \
 RUN curl -L -o /usr/local/bin/confd https://github.com/kelseyhightower/confd/releases/download/v${CONFD_VERSION}/confd-${CONFD_VERSION}-linux-amd64 \
   && chmod +x /usr/local/bin/confd
 
+# Install Gosu
+ENV GOSU_VERSION 1.9
+RUN set -x \
+    && apt-get update && apt-get install -y --no-install-recommends ca-certificates wget && rm -rf /var/lib/apt/lists/* \
+    && dpkgArch="$(dpkg --print-architecture | awk -F- '{ print $NF }')" \
+    && wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch" \
+    && wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch.asc" \
+    && export GNUPGHOME="$(mktemp -d)" \
+    && gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
+    && gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \
+    && rm -r "$GNUPGHOME" /usr/local/bin/gosu.asc \
+    && chmod +x /usr/local/bin/gosu \
+    && gosu nobody true \
+    && rm -rf /var/lib/apt/lists/*
+
 COPY conf.d /etc/confd/conf.d
 COPY templates /etc/confd/templates
 
-RUN mkdir -p /home/postgres/restore && chown -R postgres /home/postgres
 COPY /docker-entrypoint.sh /
-USER postgres
 WORKDIR /home/postgres
 
+VOLUME [ "/home/postgres/pghoard" ]
+
 ENTRYPOINT ["/docker-entrypoint.sh"]

9.5/docker-entrypoint.sh

@@ -2,6 +2,10 @@
 
 set -e
 
+echo "Fix permissions"
+mkdir -p /home/postgres/restore
+chown -R postgres /home/postgres
+
 echo "Create physical_replication_slot on master ..."
 export PGPASSWORD=$PG_PASSWORD
 until psql -qAt -U replicator -h $PG_HOST -d postgres -c "select user;"; do 
@@ -21,4 +25,4 @@ echo "Dump configuration..."
 cat /home/postgres/pghoard.json
 
 echo "Run the pghoard daemon ..."
-exec pghoard --short-log --config /home/postgres/pghoard.json
+exec gosu postgres pghoard --short-log --config /home/postgres/pghoard.json