systemd: Change to a single script for starting services

* Pass the EDDN service to be started as $1.
* eddn_config now defines a python venv activate script to use.
* And this new central script uses that.

contrib/systemd/eddn@.service

@@ -18,7 +18,7 @@ After=network.target
 Type=simple
 User=eddn
 Group=eddn
-ExecStart=/home/eddn/.local/bin/start-%i
+ExecStart=/home/eddn/.local/bin/start-eddn-service %i
 TimeoutStartSec=10s
 TimeoutStopSec=10s
 SyslogIdentifier=eddn@%i

contrib/systemd/eddn_config

@@ -1,2 +1,3 @@
 CONFIG_OVERRIDE="${HOME}/.local/share/eddn/config.json"
 LOG_DIR="${HOME}/.var/log/eddn"
+PYTHON_VENV_ACTIVATE="${HOME}/eddn/python2.7-venv/bin/activate"

contrib/systemd/start-eddn-gateway

@@ -1,16 +0,0 @@
-#!/bin/sh
-# vim: tabstop=2 shiftwidth=2 textwidth=0 wrapmargin=0 expandtab
-#
-# Start the EDDN Gateway, including redirecting output to a log file.
-
-EXEC_PATH=$(dirname $0)
-#echo "EXEC_PATH: ${EXEC_PATH}"
-
-# Ensure we're in the correct place
-cd ${EXEC_PATH}
-#pwd
-
-# Bring in some common configuration
-. ./eddn_config
-
-./eddn-gateway --config "${CONFIG_OVERRIDE}" >> "${LOG_DIR}/eddn-gateway.log" 2>&1

contrib/systemd/start-eddn-monitor

@@ -1,16 +0,0 @@
-#!/bin/sh
-# vim: tabstop=2 shiftwidth=2 textwidth=0 wrapmargin=0 expandtab
-#
-# Start the EDDN Gateway, including redirecting output to a log file.
-
-EXEC_PATH=$(dirname $0)
-#echo "EXEC_PATH: ${EXEC_PATH}"
-
-# Ensure we're in the correct place
-cd ${EXEC_PATH}
-#pwd
-
-# Bring in some common configuration
-. ./eddn_config
-
-./eddn-monitor --config "${CONFIG_OVERRIDE}" >> "${LOG_DIR}/eddn-monitor.log" 2>&1

contrib/systemd/start-eddn-relay

@@ -1,16 +0,0 @@
-#!/bin/sh
-# vim: tabstop=2 shiftwidth=2 textwidth=0 wrapmargin=0 expandtab
-#
-# Start the EDDN Gateway, including redirecting output to a log file.
-
-EXEC_PATH=$(dirname $0)
-#echo "EXEC_PATH: ${EXEC_PATH}"
-
-# Ensure we're in the correct place
-cd ${EXEC_PATH}
-#pwd
-
-# Bring in some common configuration
-. ./eddn_config
-
-./eddn-relay --config "${CONFIG_OVERRIDE}" >> "${LOG_DIR}/eddn-relay.log" 2>&1

contrib/systemd/start-eddn-service

@@ -0,0 +1,37 @@
+#!/bin/bash -x
+# vim: tabstop=2 shiftwidth=2 textwidth=0 wrapmargin=0 expandtab
+#
+# Start an EDDN Service, including redirecting output to a log file.
+
+if [ -z "${1}" ];
+then
+  echo "No EDDN service specified.  One of: ${SERVICE}, monitor, relay"
+  exit 3
+fi
+SERVICE="${1}"
+
+EXEC_PATH=$(dirname $0)
+#echo "EXEC_PATH: ${EXEC_PATH}"
+
+# Ensure we're in the correct place
+cd ${EXEC_PATH}
+#pwd
+
+# Bring in some common configuration
+if [ ! -f eddn_config ];
+then
+  echo "eddn_config is missing from $(pwd)"
+  exit 1
+fi
+. ./eddn_config
+
+# Use the python venv
+. "${PYTHON_VENV_ACTIVATE}"
+
+if [ ! -f eddn-${SERVICE} ];
+then
+  echo "eddn-${SERVICE} is missing from $(pwd)"
+  exit 2
+fi
+
+./eddn-${SERVICE} --config "${CONFIG_OVERRIDE}" >> "${LOG_DIR}/eddn-${SERVICE}.log" 2>&1