249 lines
9.9 KiB
Plaintext
249 lines
9.9 KiB
Plaintext
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#!/bin/sh
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#
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### BEGIN INIT INFO
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# Provides: haproxy
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# Required-Start: $syslog $remote_fs
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# Should-Start: $time ypbind sendmail
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# Required-Stop: $syslog $remote_fs
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# Should-Stop: $time ypbind sendmail
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# Default-Start: 3 5
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# Default-Stop: 0 1 2 6
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# Short-Description: haproxy
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# Description: Start haproxy a reliable, high performance TCP/HTTP load balancer
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### END INIT INFO
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#
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# Any extensions to the keywords given above should be preceeded by
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# X-VendorTag- (X-UnitedLinux- X-SuSE- for us) according to LSB.
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#
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# Notes on Required-Start/Should-Start:
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# * There are two different issues that are solved by Required-Start
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# and Should-Start
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# (a) Hard dependencies: This is used by the runlevel editor to determine
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# which services absolutely need to be started to make the start of
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# this service make sense. Example: nfsserver should have
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# Required-Start: $portmap
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# Also, required services are started before the dependent ones.
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# The runlevel editor will warn about such missing hard dependencies
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# and suggest enabling. During system startup, you may expect an error,
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# if the dependency is not fulfilled.
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# (b) Specifying the init script ordering, not real (hard) dependencies.
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# This is needed by insserv to determine which service should be
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# started first (and at a later stage what services can be started
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# in parallel). The tag Should-Start: is used for this.
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# It tells, that if a service is available, it should be started
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# before. If not, never mind.
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# * When specifying hard dependencies or ordering requirements, you can
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# use names of services (contents of their Provides: section)
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# or pseudo names starting with a $. The following ones are available
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# according to LSB (1.1):
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# $local_fs all local file systems are mounted
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# (most services should need this!)
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# $remote_fs all remote file systems are mounted
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# (note that /usr may be remote, so
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# many services should Require this!)
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# $syslog system logging facility up
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# $network low level networking (eth card, ...)
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# $named hostname resolution available
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# $netdaemons all network daemons are running
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# The $netdaemons pseudo service has been removed in LSB 1.2.
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# For now, we still offer it for backward compatibility.
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# These are new (LSB 1.2):
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# $time the system time has been set correctly
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# $portmap SunRPC portmapping service available
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# UnitedLinux extensions:
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# $ALL indicates that a script should be inserted
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# at the end
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# * The services specified in the stop tags
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# (Required-Stop/Should-Stop)
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# specify which services need to be still running when this service
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# is shut down. Often the entries there are just copies or a subset
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# from the respective start tag.
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# * Should-Start/Stop are now part of LSB as of 2.0,
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# formerly SUSE/Unitedlinux used X-UnitedLinux-Should-Start/-Stop.
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# insserv does support both variants.
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# * X-UnitedLinux-Default-Enabled: yes/no is used at installation time
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# (%fillup_and_insserv macro in %post of many RPMs) to specify whether
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# a startup script should default to be enabled after installation.
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# It's not used by insserv.
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#
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# Note on runlevels:
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# 0 - halt/poweroff 6 - reboot
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# 1 - single user 2 - multiuser without network exported
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# 3 - multiuser w/ network (text mode) 5 - multiuser w/ network and X11 (xdm)
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#
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# Note on script names:
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# http://www.linuxbase.org/spec/refspecs/LSB_1.3.0/gLSB/gLSB/scrptnames.html
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# A registry has been set up to manage the init script namespace.
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# http://www.lanana.org/
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# Please use the names already registered or register one or use a
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# vendor prefix.
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# Check for missing binaries (stale symlinks should not happen)
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# Note: Special treatment of stop for LSB conformance
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HAPROXY_BIN=/usr/sbin/haproxy
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test -x $HAPROXY_BIN || { echo "$HAPROXY_BIN not installed";
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if [ "$1" = "stop" ]; then exit 0;
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else exit 5; fi; }
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HAPROXY_PID="/var/run/haproxy.pid"
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HAPROXY_CONF="/etc/haproxy/haproxy.cfg"
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## Check for existence of needed config file and read it
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#HAPROXY_CONFIG=/etc/sysconfig/haproxy
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#test -r $HAPROXY_CONFIG || { echo "$HAPROXY_CONFIG not existing";
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# if [ "$1" = "stop" ]; then exit 0;
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# else exit 6; fi; }
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#
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## Read config
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#. $HAPROXY_CONFIG
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# Source LSB init functions
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# providing start_daemon, killproc, pidofproc,
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# log_success_msg, log_failure_msg and log_warning_msg.
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# This is currently not used by UnitedLinux based distributions and
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# not needed for init scripts for UnitedLinux only. If it is used,
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# the functions from rc.status should not be sourced or used.
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#. /lib/lsb/init-functions
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# Shell functions sourced from /etc/rc.status:
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# rc_check check and set local and overall rc status
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# rc_status check and set local and overall rc status
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# rc_status -v be verbose in local rc status and clear it afterwards
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# rc_status -v -r ditto and clear both the local and overall rc status
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# rc_status -s display "skipped" and exit with status 3
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# rc_status -u display "unused" and exit with status 3
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# rc_failed set local and overall rc status to failed
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# rc_failed <num> set local and overall rc status to <num>
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# rc_reset clear both the local and overall rc status
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# rc_exit exit appropriate to overall rc status
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# rc_active checks whether a service is activated by symlinks
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. /etc/rc.status
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# Reset status of this service
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rc_reset
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# Return values acc. to LSB for all commands but status:
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# 0 - success
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# 1 - generic or unspecified error
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# 2 - invalid or excess argument(s)
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# 3 - unimplemented feature (e.g. "reload")
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# 4 - user had insufficient privileges
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# 5 - program is not installed
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# 6 - program is not configured
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# 7 - program is not running
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# 8--199 - reserved (8--99 LSB, 100--149 distrib, 150--199 appl)
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#
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# Note that starting an already running service, stopping
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# or restarting a not-running service as well as the restart
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# with force-reload (in case signaling is not supported) are
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# considered a success.
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function haproxy_check() {
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HAPROXY_CONFIG_CHECK="$($HAPROXY_BIN -c -q -f $HAPROXY_CONF 2>&1)"
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if [ $? -ne 0 ] ; then
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echo "" >&2
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echo "$HAPROXY_CONFIG_CHECK" >&2
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rc_failed
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rc_status -v
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exit 1
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else
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return 0
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fi
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}
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case "$1" in
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start)
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echo -n "Starting haproxy "
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## Start daemon with startproc(8). If this fails
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## the return value is set appropriately by startproc.
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haproxy_check
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/sbin/startproc $HAPROXY_BIN -D -f $HAPROXY_CONF -p $HAPROXY_PID
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# Remember status and be verbose
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rc_status -v
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;;
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stop)
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echo -n "Shutting down haproxy "
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## Stop daemon with killproc(8) and if this fails
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## killproc sets the return value according to LSB.
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/sbin/killproc -TERM $HAPROXY_BIN
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# Remember status and be verbose
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rc_status -v
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;;
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try-restart|condrestart)
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## Do a restart only if the service was active before.
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## Note: try-restart is now part of LSB (as of 1.9).
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## RH has a similar command named condrestart.
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if test "$1" = "condrestart"; then
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echo "${attn} Use try-restart ${done}(LSB)${attn} rather than condrestart ${warn}(RH)${norm}"
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fi
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$0 status
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if test $? = 0; then
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# we us reload here for a graceful restart during update
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$0 reload
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else
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rc_reset # Not running is not a failure.
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fi
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# Remember status and be quiet
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rc_status
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;;
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restart)
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## Stop the service and regardless of whether it was
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## running or not, start it again.
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haproxy_check
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$0 stop
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$0 start
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# Remember status and be quiet
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rc_status
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;;
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check)
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## Stop the service and regardless of whether it was
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## running or not, start it again.
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echo -n "Checking config of haproxy "
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haproxy_check
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rc_status -v
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;;
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reload|force-reload)
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## Like force-reload, but if daemon does not support
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## signaling, do nothing (!)
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haproxy_check
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# If it supports signaling:
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echo -n "Reload service haproxy "
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$HAPROXY_BIN -p $HAPROXY_PID -D -f $HAPROXY_CONF -sf $(cat $HAPROXY_PID)
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rc_status -v
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;;
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status)
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echo -n "Checking for service haproxy "
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## Check status with checkproc(8), if process is running
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## checkproc will return with exit status 0.
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# Return value is slightly different for the status command:
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# 0 - service up and running
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# 1 - service dead, but /var/run/ pid file exists
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# 2 - service dead, but /var/lock/ lock file exists
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# 3 - service not running (unused)
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# 4 - service status unknown :-(
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# 5--199 reserved (5--99 LSB, 100--149 distro, 150--199 appl.)
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# NOTE: checkproc returns LSB compliant status values.
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/sbin/checkproc $HAPROXY_BIN
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# NOTE: rc_status knows that we called this init script with
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# "status" option and adapts its messages accordingly.
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rc_status -v
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;;
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probe)
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## Optional: Probe for the necessity of a reload, print out the
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## argument to this init script which is required for a reload.
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## Note: probe is not (yet) part of LSB (as of 1.9)
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test $HAPROXY_CONF -nt $HAPROXY_PID && echo reload
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;;
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*)
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echo "Usage: $0 {start|stop|status|try-restart|restart|force-reload|reload|probe}"
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exit 1
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;;
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esac
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rc_exit
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