Merge pull request #55 from pgexperts/scripts/init-scripts

Added Upstart job for running patroni under Ubuntu 14.04 or 12.04.

extras/startup-scripts/README.md

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+# startup scripts for Patroni
+
+This directory contains sample startup scripts for various OSes 
+and management tools for Patroni.
+
+Scripts supplied:
+
+### patroni.upstart.conf
+
+Upstart job for Ubuntu 12.04 or 14.04.  Requires Upstart > 1.4. Intended for systems where Patroni has been installed on a base system, rather than in Docker.

extras/startup-scripts/patroni.upstart.conf

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+# patroni - patroni daemon
+#
+# controls startup/shutdown of postgres
+# you should disable any postgres start jobs
+#
+# assumes that patroni has been installed into the
+# pythonpath by using setup.py install
+
+description    "patroni start daemon"
+
+start on net-device-up
+stop on runlevel [06]
+
+respawn
+respawn limit 5 10
+
+# set location of patroni
+env PATRONI=/usr/local/bin/patroni
+# virtualenv example
+# env PATRONI=/var/lib/postgresql/patronienv/bin/patroni
+
+# set location of config file
+env PATRONICONF=/etc/patroni/patroni.yml
+
+# set log dir for patroni logs
+# postgres user must have write permission
+env POSTGRESLOGDIR=/var/log/postgresql
+
+setuid postgres
+setgid postgres
+
+script
+    exec start-stop-daemon --start \
+        --exec $PATRONI -- $PATRONICONF \
+        >> $POSTGRESLOGDIR/patroni.log 2>&1
+end script