restart patroni service if it crashed

patroni/patroni#2372

roles/patroni/templates/patroni.service.j2

@@ -1,5 +1,5 @@
 [Unit]
-Description=Runners to orchestrate a high-availability PostgreSQL - patroni
+Description=Runners to orchestrate a high-availability PostgreSQL - Patroni
 After=syslog.target network.target
 
 [Service]
@@ -11,6 +11,7 @@ Group=postgres
 # Read in configuration file if it exists, otherwise proceed
 EnvironmentFile=-/etc/patroni_env.conf
 
+# The default is the user's home directory, and if you want to change it, you must provide an absolute path.
 # WorkingDirectory=~
 
 # Where to send early-startup messages from the server
@@ -32,14 +33,14 @@ ExecStart=/usr/bin/patroni /etc/patroni/patroni.yml
 # Send HUP to reload from patroni.yml
 ExecReload=/bin/kill -s HUP $MAINPID
 
-# only kill the patroni process, not it's children, so it will gracefully stop postgres
+# Only kill the patroni process, not it's children, so it will gracefully stop postgres
 KillMode=process
 
 # Give a reasonable amount of time for the server to start up/shut down
 TimeoutSec=60
 
-# Do not restart the service if it crashes, we want to manually inspect database on failure
-Restart=no
+# Restart the service if it crashed
+Restart=on-failure
 
 [Install]
 WantedBy=multi-user.target