packaging: add statusd daemon

refactored https://github.com/eLvErDe/hwraid/blob/master/packaging/debian/megaclisas-status/megaclisas-status.megaclisas-statusd.init

.gitignore

@@ -14,6 +14,7 @@ dist
 debian/.debhelper/
 debian/debhelper-build-stamp
 debian/files
+debian/perccli-status.debhelper.log
 debian/perccli-status.substvars
 debian/perccli-status/
 venv/

Makefile

@@ -22,8 +22,7 @@ coverage:
 
 
 install:
-	mkdir -p $(DESTDIR)/usr/bin
-	install -m0755 perccli_status.py $(DESTDIR)/usr/bin/perccli-status
+	install -m0755 perccli_status.py $(DESTDIR)/usr/sbin/perccli-status
 
 install-build:
 	apt-get update && apt-get install -y build-essential devscripts

debian/control

@@ -4,15 +4,13 @@ Priority: optional
 Maintainer: Radoslav Bodó <[email protected]>
 Rules-Requires-Root: no
 Build-Depends:
- debhelper-compat (= 13),
+ debhelper-compat (= 13)
 Standards-Version: 4.6.2
 Homepage: https://github.com/bodik/perccli-status
-#Vcs-Browser: https://salsa.debian.org/debian/perccli-status
-#Vcs-Git: https://salsa.debian.org/debian/perccli-status.git
 
 Package: perccli-status
 Architecture: any
-Depends: perccli2
+Depends: perccli2, daemon
 Description:  The perccli-status software is a query tool to access the running
  configuration and status of PERC SAS HBAs.
  .

debian/dirs

@@ -0,0 +1 @@
+/usr/sbin

debian/perccli-statusd.init

@@ -0,0 +1,202 @@
+#! /bin/sh
+
+# Author: Petter Reinholdtsen <[email protected]>
+# Author: Radoslav Bodó <[email protected]>
+# License: GNU General Public License v2 or later
+#
+### BEGIN INIT INFO
+# Provides:          perccli-statusd
+# Description:       Check perccli-status values in the background.
+# Required-Start:    $remote_fs $syslog
+# Required-Stop:     $remote_fs $syslog
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: Check perccli-status values in the background.
+### END INIT INFO
+
+PATH=/sbin:/bin:/usr/sbin:/usr/bin
+DESC="perccli-status monitor"
+NAME=perccli-statusd
+PIDFILE=/var/run/$NAME.pid
+STATUSFILE=/var/run/$NAME.status
+SCRIPTNAME=/etc/init.d/$NAME
+
+
+# Do not touch you can configure this in /etc/default/perccli-statusd
+MAILTO=root   # Where to report problems
+PERIOD=600    # Seconds between each check    (default 10 minutes)
+REMIND=7200   # Seconds between each reminder (default 2 hours)
+RUN_DAEMON=yes
+
+[ -e /etc/default/perccli-statusd ] && . /etc/default/perccli-statusd
+
+# Gracefully exit if the package has been removed.
+test -x /usr/sbin/perccli-status || exit 0
+
+. /lib/lsb/init-functions
+[ -e /etc/default/rcS ] && . /etc/default/rcS
+
+if [ $RUN_DAEMON = "no" ] ; then
+	log_begin_msg "perccli-statusd is disabled in /etc/default/perccli-statusd, not starting."
+    	log_end_msg 0
+	exit 0
+fi
+
+check_perccli() {
+    echo $$ > $PIDFILE.new && mv $PIDFILE.new $PIDFILE
+    while true ; do
+        # Check ever $PERIOD seconds, send email on every status
+        # change and repeat ever $REMIND seconds if the raid is still
+        # bad.
+        if (perccli-status); then
+            BADRAID=false
+        else
+            BADRAID=true
+            logger -t perccli-statusd "detected non-optimal RAID status"
+        fi
+        STATUSCHANGE=false
+        if [ true = "$BADRAID" ] ; then
+            # RAID not OK
+            (perccli-status) > $STATUSFILE.new
+            if [ ! -f $STATUSFILE ] ; then # RAID just became broken
+                STATUSCHANGE=true
+                mv $STATUSFILE.new $STATUSFILE
+            elif cmp -s $STATUSFILE $STATUSFILE.new ; then
+                # No change.  Should we send reminder?
+                LASTTIME="`stat -c '%Z' $STATUSFILE`"
+                NOW="`date +%s`"
+                SINCELAST="`expr $NOW - $LASTTIME`"
+                if [ $REMIND -le "$SINCELAST" ]; then
+                    # Time to send reminder
+                    STATUSCHANGE=true
+                    mv $STATUSFILE.new $STATUSFILE
+                else
+                    rm $STATUSFILE.new
+                fi
+            else
+                STATUSCHANGE=true
+                mv $STATUSFILE.new $STATUSFILE
+            fi
+        else
+            # RAID OK
+            if [ -f $STATUSFILE ] ; then
+                rm $STATUSFILE
+                STATUSCHANGE=true
+            fi
+        fi
+
+        if [ true = "$STATUSCHANGE" ]; then
+            hostname="`uname -n`"
+            (
+                cat <<EOF 
+This is a RAID status update from perccli-statusd.  The perccli-status
+program reports that one of the RAIDs changed state:
+
+EOF
+                if [ -f $STATUSFILE ] ; then
+                    cat $STATUSFILE
+                else
+                    (perccli-status)
+                fi
+                echo
+                echo "Report from $0 on $hostname"
+            ) | mail -s "info: MegaRAID raid status change on $hostname" $MAILTO
+        fi
+	sleep $PERIOD &
+	# Kill sleep if we're signaled to exit, otherwise we will stay defunct
+	# until sleep terminates.
+	trap "kill $!; exit" TERM
+	wait $!
+	trap - TERM
+    done
+}
+
+check_daemon() {
+        # Let's check if there is a daemon which is really running and not timing out
+        DAEMON_RUN=`ps aux | grep "/etc/init.d/perccli-statusd check_perccli" | grep -v grep | grep -v daemon`
+        if [ -n "$DAEMON_RUN" ] ; then
+                return 1;
+        else
+                return 0;
+        fi
+}
+
+#
+#       Function that starts the daemon/service.
+#
+d_start() {
+    [ -f $PIDFILE ] && PID="`cat $PIDFILE`"
+    if [ "$PID" ] ; then
+        log_progress_msg "Daemon already running. Refusing to start another"
+        return 0
+    elif check_daemon ; then
+        # Use the daemon package to turn this script into a daemon
+        start-stop-daemon --start --quiet --pidfile $PIDFILE \
+                --oknodo --exec /usr/bin/daemon /usr/bin/daemon $SCRIPTNAME check_perccli
+	return 0
+    else
+        log_progress_msg "Daemon is already running. Refusing to start another"
+        return 0
+    fi
+}
+
+#
+#       Function that stops the daemon/service.
+#
+d_stop() {
+        if [ -f $PIDFILE ] ; then
+             	start-stop-daemon --stop --oknodo --quiet --pidfile $PIDFILE > /dev/null 2>&1 
+		rm -f $PIDFILE
+        else
+                log_progress_msg "Daemon is already stopped."
+                return 0
+        fi
+}
+
+# This is a workaround function which does not directly exit and
+# therefore can be used by a restart
+d_stop_by_restart() {
+        if [ -f $PIDFILE ] ; then
+                start-stop-daemon --oknodo --stop --quiet --pidfile $PIDFILE
+                rm -f $PIDFILE
+                log_end_msg 0
+        else
+                log_progress_msg "Daemon is already stopped."
+                log_end_msg 0
+        fi
+}
+
+case "$1" in
+  start)
+        echo -n ""
+        log_begin_msg "Starting $DESC: $NAME"
+        d_start ; CODE=$?
+        log_end_msg $CODE
+        ;;
+  stop)
+        log_begin_msg "Stopping $DESC: $NAME"
+        d_stop ; CODE=$?
+        log_end_msg $CODE
+        ;;
+  check_perccli)
+        check_perccli
+        ;;
+  status)
+	status_of_proc /usr/bin/daemon $NAME
+	exit $?
+	;;
+  restart|force-reload)
+        log_begin_msg "Restarting $DESC: $NAME"
+        d_stop_by_restart
+        sleep 1
+        d_start || CODE=$?
+        log_end_msg $CODE
+        ;;
+  *)
+        # echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
+        echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2
+        exit 1
+        ;;
+esac
+
+exit 0

debian/rules

@@ -1,13 +1,10 @@
 #!/usr/bin/make -f
 
-# See debhelper(7) (uncomment to enable).
-# Output every command that modifies files on the build system.
 export DH_VERBOSE = 1
-
-
-# See FEATURE AREAS in dpkg-buildflags(1).
 export DEB_BUILD_MAINT_OPTIONS = hardening=+all
 
-
 %:
 	dh $@
+
+override_dh_installinit:
+	dh_installinit --name=perccli-statusd