eventsapi: Add Init scripts for different distributions

Added init scripts for
- SysvInit(CentOS 6 or Red Hat 6)
- rc.d (FreeBSD)

Most of the latest distributions are using systemd. Support to be
added for other distributions which are not using systemd.

Removed systemctl wrapper functions(start/stop/status) from
gluster-eventsapi CLI(peer_eventsapi.py). Status and Reload
re-implemented using pid file check.

Added pid file support for glustereventsd.

Following dependencies removed
python-flask - Only used for example dashboard. User can install
if required.
python-fasteners - Not available for EPEL 6, added custom code using
fcntl as replacement.

BUG: 1365395
Change-Id: I26792eae9b11e93304f70b3997cd7d8d03b067f4
Signed-off-by: Aravinda VK <avishwan@redhat.com>
Reviewed-on: http://review.gluster.org/15367
Smoke: Gluster Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>

4 files changed, 160 insertions, 2 deletions

diff --git a/extras/init.d/Makefile.am b/extras/init.d/Makefile.am
index 8c43e513d77..bd8837bd9f7 100644
--- a/extras/init.d/Makefile.am
+++ b/extras/init.d/Makefile.am
@@ -1,5 +1,7 @@
 
-EXTRA_DIST = glusterd-Debian glusterd-FreeBSD glusterd-Redhat glusterd-SuSE glusterd.plist rhel5-load-fuse.modules
+EXTRA_DIST = glusterd-Debian glusterd-FreeBSD glusterd-Redhat glusterd-SuSE \
+	glusterd.plist rhel5-load-fuse.modules \
+	glustereventsd-FreeBSD glustereventsd-Redhat
 
 CLEANFILES =
 
@@ -13,6 +15,13 @@ $(GF_DISTRIBUTION):
 		$(INSTALL_PROGRAM) glusterd-$(GF_DISTRIBUTION) $(DESTDIR)$(INIT_DIR)/glusterd; \
 	fi
 
+if BUILD_EVENTS
+	@if [ ! -d $(SYSTEMD_DIR) ]; then \
+		$(mkdir_p) $(DESTDIR)$(INIT_DIR); \
+		$(INSTALL_PROGRAM) glustereventsd-$(GF_DISTRIBUTION) $(DESTDIR)$(INIT_DIR)/glustereventsd; \
+	fi
+endif
+
 install-exec-local: $(GF_DISTRIBUTION)
 
 install-data-local:
diff --git a/extras/init.d/glustereventsd-FreeBSD.in b/extras/init.d/glustereventsd-FreeBSD.in
new file mode 100644
index 00000000000..2e8303ec6c6
--- /dev/null
+++ b/extras/init.d/glustereventsd-FreeBSD.in
@@ -0,0 +1,19 @@
+#!/bin/sh
+#
+# $FreeBSD$
+#
+
+# PROVIDE: glustereventsd
+
+. /etc/rc.subr
+
+name="glustereventsd"
+rcvar=`set_rcvar`
+command=@prefix@/sbin/${name}
+command_interpreter=/usr/local/bin/python
+pidfile="/var/run/${name}.pid"
+glustereventsd_flags="-p /var/run/${name}.pid"
+start_cmd="/usr/sbin/daemon $command ${glustereventsd_flags}"
+
+load_rc_config $name
+run_rc_command "$1"
diff --git a/extras/init.d/glustereventsd-Redhat.in b/extras/init.d/glustereventsd-Redhat.in
new file mode 100644
index 00000000000..d23ce4c244f
--- /dev/null
+++ b/extras/init.d/glustereventsd-Redhat.in
@@ -0,0 +1,129 @@
+#!/bin/bash
+#
+# glustereventsd   Startup script for the glusterfs Events server
+#
+# chkconfig:   - 20 80
+# description: Gluster Events Server
+
+### BEGIN INIT INFO
+# Provides: glustereventsd
+# Required-Start: $local_fs $network
+# Required-Stop: $local_fs $network
+# Should-Start:
+# Should-Stop:
+# Default-Start: 2 3 4 5
+# Default-Stop: 0 1 6
+# Short-Description: glusterfs Events server
+# Description:       GlusterFS Events Server
+### END INIT INFO
+#
+
+# Source function library.
+. /etc/rc.d/init.d/functions
+
+BASE=glustereventsd
+
+# Fedora File System Layout dictates /run
+[ -e /run ] && RUNDIR="/run"
+PIDFILE="${RUNDIR:-/var/run}/${BASE}.pid"
+
+PID=`test -f $PIDFILE && cat $PIDFILE`
+
+GLUSTEREVENTSD_BIN=@prefix@/sbin/$BASE
+GLUSTEREVENTSD_OPTS="--pid-file=$PIDFILE"
+GLUSTEREVENTSD="$GLUSTEREVENTSD_BIN $GLUSTEREVENTSD_OPTS"
+RETVAL=0
+
+LOCKFILE=/var/lock/subsys/${BASE}
+
+# Start the service $BASE
+start()
+{
+       if pidofproc -p $PIDFILE $GLUSTEREVENTSD_BIN &> /dev/null; then
+           echo "glustereventsd service is already running with pid $PID"
+           return 0
+       else
+           echo -n $"Starting $BASE:"
+           daemon $GLUSTEREVENTSD &
+           RETVAL=$?
+           echo
+           [ $RETVAL -eq 0 ] && touch $LOCKFILE
+           return $RETVAL
+       fi
+}
+
+# Stop the service $BASE
+stop()
+{
+    echo -n $"Stopping $BASE:"
+    if pidofproc -p $PIDFILE $GLUSTEREVENTSD_BIN &> /dev/null; then
+        killproc -p $PIDFILE $BASE
+    else
+        killproc $BASE
+    fi
+    RETVAL=$?
+    echo
+    [ $RETVAL -eq 0 ] && rm -f $LOCKFILE
+    return $RETVAL
+}
+
+restart()
+{
+    stop
+    start
+}
+
+reload()
+{
+    restart
+}
+
+force_reload()
+{
+    restart
+}
+
+rh_status()
+{
+    status $BASE
+}
+
+rh_status_q()
+{
+    rh_status &>/dev/null
+}
+
+
+### service arguments ###
+case $1 in
+    start)
+        rh_status_q && exit 0
+        $1
+        ;;
+    stop)
+        rh_status_q || exit 0
+        $1
+        ;;
+    restart)
+        $1
+        ;;
+    reload)
+        rh_status_q || exit 7
+        $1
+        ;;
+    force-reload)
+        force_reload
+        ;;
+    status)
+        rh_status
+        ;;
+    condrestart|try-restart)
+        rh_status_q || exit 0
+        restart
+        ;;
+    *)
+        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
+        exit 1
+esac
+
+exit $?
diff --git a/extras/systemd/glustereventsd.service.in b/extras/systemd/glustereventsd.service.in
index 75cca16128f..4bfcf42f386 100644
--- a/extras/systemd/glustereventsd.service.in
+++ b/extras/systemd/glustereventsd.service.in
@@ -5,9 +5,10 @@ After=syslog.target network.target
 [Service]
 Environment=PYTHONPATH=@BUILD_PYTHON_SITE_PACKAGES_EXPANDED@:$PYTHONPATH
 Type=simple
-ExecStart=@SBIN_DIR@/glustereventsd
+ExecStart=@SBIN_DIR@/glustereventsd --pid-file @localstatedir@/run/glustereventsd.pid
 ExecReload=/bin/kill -SIGUSR2 $MAINPID
 KillMode=control-group
+PIDFile=@localstatedir@/run/glustereventsd.pid
 
 [Install]
 WantedBy=multi-user.target