Adding carbon-relay (fixing #67)

Dockerfile

@@ -134,7 +134,7 @@ COPY --from=build /opt /opt
 RUN /usr/local/bin/django_admin_init.exp
 
 # defaults
-EXPOSE 80 2003-2004 2023-2024 8080 8125 8125/udp 8126
+EXPOSE 80 2003-2004 2013-2014 2023-2024 8080 8125 8125/udp 8126
 VOLUME ["/opt/graphite/conf", "/opt/graphite/storage", "/opt/graphite/webapp/graphite/functions/custom", "/etc/nginx", "/opt/statsd", "/etc/logrotate.d", "/var/log", "/var/lib/redis"]
 
 CMD ["/sbin/my_init"]

README.md

@@ -163,6 +163,9 @@ Graphite stores tag information in a separate tag database (TagDB). Please check
 ## Collectd
 Use `COLLECTD=1` environment variable to enable local collectd instance
 
+## Carbon-relay
+Use `RELAY=1` environment variable to enable carbon relay instance. Use `[relay]` section of carbon.conf to configure it.
+
 ## Change the Configuration
 
 Read up on Graphite's [post-install tasks](https://graphite.readthedocs.org/en/latest/install.html#post-install-tasks).

conf/etc/service/carbon-relay/run

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+[[ -n ${RELAY} ]] || exit 1
+rm -f /opt/graphite/storage/carbon-relay-a.pid
+source /opt/graphite/bin/activate
+exec python3 /opt/graphite/bin/carbon-relay.py start --debug 2>&1 >> /var/log/carbon-relay.log