add rc-script for postgres_exporter

Author: rp

postgres_exporter.rc

@@ -0,0 +1,89 @@
+#!/bin/sh
+
+# PROVIDE: postgres_exporter
+# REQUIRE: LOGIN
+# KEYWORD: shutdown
+#
+# rc-script for postgres_exporter 
+#
+#
+# Add the following lines to /etc/rc.conf.local or /etc/rc.conf
+# to enable this service:
+#
+# postgres_exporter_enable (bool):          Set to NO by default.
+#               Set it to YES to enable postgres_exporter.
+# postgres_exporter_user (string):          Set user that postgres_exporter will run under
+#               Default is "nobody".
+# postgres_exporter_group (string):         Set group that postgres_exporter will run under
+#               Default is "nobody".
+# postgres_exporter_args (string):          Set extra arguments to pass to postgres_exporter
+#               Default is "".
+# postgres_exporter_listen_address (string):Set ip:port to listen on for web interface and telemetry.
+#		Defaults to ":9187"
+# postgres_exporter_pg_user (string):	    Set the Postgres database user
+#		Defaults to "postgres_exporter"
+# postgres_exporter_pg_pass (string):	    Set the Postgres datase password
+#		Default is empty
+# postgres_exporter_pg_host (string):	    Set the Postgres database server
+#		Defaults to "localhost"
+# postgres_exporter_pg_port (string):  	    Set the Postgres database port
+#		Defaults to "5432"
+
+# Add extra arguments via "postgres_exporter_args" which could be choosen from:
+# (see $ postgres_exporter --help)
+#
+#  -dumpmaps
+#    	Do not run, simply dump the maps.
+#  -extend.query-path string
+#    	Path to custom queries to run.
+#  -log.level value
+#    	Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal].
+#  -version
+#    	print version and exit
+#  -web.telemetry-path string
+#    	Path under which to expose metrics. (default "/metrics")
+#  -log.format value
+#    	If set use a syslog logger or JSON logging. Example: logger:syslog?appname=bob&local=7 or logger:stdout?json=true. Defaults to stderr.
+#  -extend.query-path string
+#    	Path to custom queries to run.
+
+
+. /etc/rc.subr
+
+name=postgres_exporter
+rcvar=postgres_exporter_enable
+
+load_rc_config $name
+
+: ${postgres_exporter_enable:="NO"}
+: ${postgres_exporter_user:="nobody"}
+: ${postgres_exporter_group:="nobody"}
+: ${postgres_exporter_args:=""}
+: ${postgres_exporter_listen_address:=":9187"}
+: ${postgres_exporter_pg_user:="postgres_exporter"}
+: ${postgres_exporter_pg_pass:=""}
+: ${postgres_exporter_pg_host:="localhost"}
+: ${postgres_exporter_pg_port:="5432"}
+
+postgres_exporter_data_source_name="postgresql://${postgres_exporter_pg_user}:${postgres_exporter_pg_pass}@${postgres_exporter_pg_host}:${postgres_exporter_pg_port}/postgres?sslmode=disable"
+
+
+pidfile=/var/run/postgres_exporter.pid
+command="/usr/sbin/daemon"
+procname="/usr/local/bin/postgres_exporter"
+command_args="-p ${pidfile} /usr/bin/env DATA_SOURCE_NAME="${postgres_exporter_data_source_name}" ${procname} \
+    -web.listen-address=${postgres_exporter_listen_address} \
+    ${postgres_exporter_args}"
+
+start_precmd=postgres_exporter_startprecmd
+
+postgres_exporter_startprecmd()
+{
+    if [ ! -e ${pidfile} ]; then
+        install -o ${postgres_exporter_user} -g ${postgres_exporter_group} /dev/null ${pidfile};
+    fi
+}
+
+load_rc_config $name
+run_rc_command "$1"
+