#!/bin/sh # # High-Availability Apache/IBMhttp control script # # apache (aka IBMhttpd) # # Description: starts/stops apache web servers. # # Author: Alan Robertson # Sun Jiang Dong # # Support: linux-ha@lists.linux-ha.org # # License: GNU General Public License (GPL) # # Copyright: (C) 2002-2005 International Business Machines # # # An example usage in /etc/ha.d/haresources: # node1 10.0.0.170 apache::/opt/IBMHTTPServer/conf/httpd.conf # node1 10.0.0.170 IBMhttpd # # Our parsing of the Apache config files is very rudimentary. # It'll work with lots of different configurations - but not every # possible configuration. # # Patches are being accepted ;-) # # OCF parameters: # OCF_RESKEY_configfile # OCF_RESKEY_httpd # OCF_RESKEY_port # OCF_RESKEY_statusurl # OCF_RESKEY_options # OCF_RESKEY_testregex # OCF_RESKEY_envfiles . ${OCF_ROOT}/resource.d/heartbeat/.ocf-shellfuncs HA_VARRUNDIR=${HA_VARRUN} ####################################################################### # # Configuration options - usually you don't need to change these # ####################################################################### # HTTPD="httpd" IBMHTTPD=/opt/IBMHTTPServer/bin/httpd HTTPDLIST="/usr/local/apache/bin/httpd /sbin/httpd2 /usr/sbin/httpd2 /usr/sbin/apache2 /sbin/httpd /usr/sbin/httpd /usr/sbin/apache $IBMHTTPD" MPM=/usr/share/apache2/find_mpm if [ -x $MPM ] then HTTPDLIST="$HTTPDLIST `$MPM 2>/dev/null`" fi WGETOPTS="-O- -q -L" LOCALHOST="http://localhost" HTTPDOPTS="" DEFAULT_IBMCONFIG=/opt/IBMHTTPServer/conf/httpd.conf DEFAULT_NORMCONFIG="/usr/local/apache/conf/httpd.conf" # # You can also set # HTTPD # PORT # STATUSURL # CONFIGFILE # in this section if what we're doing doesn't work for you... # # End of Configuration options ####################################################################### CMD=`basename $0` # The config-file-pathname is the pathname to the configuration # file for this web server. Various appropriate defaults are # assumed if no config file is specified. If this command is # invoked as *IBM*, then the default config file name is # $DEFAULT_IBMCONFIG, otherwise the default config file # will be $DEFAULT_NORMCONFIG. usage() { cat <<-! usage: $0 action action: start start the web server stop stop the web server status return the status of web server, run or down monitor return TRUE if the web server appears to be working. For this to be supported you must configure mod_status and give it a server-status URL. You have to have installed $WGET for this to work. meta-data show meta data message validate-all validate the instance parameters ! exit $1 } source_envfiles() { for f; do [ -f "$f" -a -r "$f" ] && . "$f" done } apachecat() { awk ' function procline() { split($0,a); if( a[1]=="Include" ) { procinclude(a[2]); } else { if( a[1]=="ServerRoot" ) { rootdir=a[2]; gsub("\"","",rootdir); } print; } } function printfile(infile, a) { while( (getline 0 ) { procline(); } close(infile); } function allfiles(dir, cmd,f) { cmd="find -L "dir" -type f"; while( ( cmd | getline f ) > 0 ) { printfile(f); } close(cmd); } function listfiles(pattern, cmd,f) { cmd="ls "pattern" 2>/dev/null"; while( ( cmd | getline f ) > 0 ) { printfile(f); } close(cmd); } function procinclude(spec) { if( rootdir!="" && spec!~/^\// ) { spec=rootdir"/"spec; } if( isdir(spec) ) { allfiles(spec); # read all files in a directory (and subdirs) } else { listfiles(spec); # there could be jokers } } function isdir(s) { return !system("test -d \""s"\""); } { procline(); } ' $1 | sed 's/#.*//;s/[[:blank:]]*$//;s/^[[:blank:]]*//' | grep -v '^$' } # # set parameters (as shell vars) from our apache config file # get_apache_params() { configfile=$1 shift 1 vars=`echo $@ | sed 's/ /,/g'` eval ` apachecat $configfile | awk -v vars="$vars" ' BEGIN{ split(vars,v,","); for( i in v ) vl[i]=tolower(v[i]); } { for( i in v ) if( tolower($1)==vl[i] ) { print v[i]"="$2 delete vl[i] break } } '` } # # Return the location(s) that are handled by the given handler # FindLocationForHandler() { PerlScript='while (<>) { /"]+)/i && ($loc=$1); '"/SetHandler +$2"'/i && print "$loc\n"; }' apachecat $1 | perl -e "$PerlScript" } # # Check if the port is valid # CheckPort() { ocf_is_decimal "$1" && [ $1 -gt 0 ] } # # Get all the parameters we need from the Apache config file # GetParams() { ConfigFile=$1 if [ ! -f $ConfigFile ]; then return 1 fi get_apache_params $ConfigFile ServerRoot PidFile Port Listen case $PidFile in /*) ;; [[:alnum:]]*) PidFile=$ServerRoot/$PidFile;; *) PidFile=$HA_VARRUNDIR/${httpd_basename}.pid;; esac if CheckPort "$PORT"; then : else PORT=$Port if CheckPort "$PORT"; then : else # Final resort PORT=80 fi fi # # It's difficult to figure out whether the server supports # the status operation. # (we start our server with -DSTATUS - just in case :-)) # # Typically (but not necessarily) the status URL is /server-status # # For us to think status will work, we have to have the following things: # # - $WGET has to exist and be executable # - The server-status handler has to be mapped to some URL somewhere # # We assume that: # # - the "main" web server at $PORT will also support it if we can find it # somewhere in the file # - it will be supported at the same URL as the one we find in the file # # If this doesn't work for you, then set the statusurl attribute. # if [ "X$STATUSURL" = "X" ] then if have_binary $WGET then StatusURL=`FindLocationForHandler $1 server-status | tail -1` if [ "x$Listen" != "x" ] then echo $Listen | grep ':' >/dev/null || # Listen can be only port spec Listen="localhost:$Listen" STATUSURL="http://${Listen}$StatusURL" case $WGET in *wget*) WGETOPTS="$WGETOPTS --no-proxy --bind-address=127.0.0.1";; esac else STATUSURL="${LOCALHOST}:${PORT}$StatusURL" fi fi fi test "$PidFile" } # # return TRUE if a process with given PID is running # ProcessRunning() { ApachePID=$1 # Use /proc if it looks like it's here... if [ -d /proc -a -d /proc/1 ] then [ -d /proc/$ApachePID ] else # This assumes we're running as root... kill -0 "$ApachePID" >/dev/null 2>&1 fi } silent_status() { if [ -f $PidFile ] then ProcessRunning `cat $PidFile` else : No pid file false fi } start_apache() { if silent_status then ocf_log info "$CMD already running (pid $ApachePID)" return $OCF_SUCCESS fi #ocf_run $HTTPD $HTTPDOPTS $OPTIONS -f $CONFIGFILE ocf_run $HTTPD $HTTPDOPTS $OPTIONS tries=0 while : # wait until the user set timeout do monitor_apache ec=$? if [ $ec -eq $OCF_NOT_RUNNING ] then tries=`expr $tries + 1` ocf_log info "waiting for apache $CONFIGFILE to come up" sleep 1 else break fi done return $ec } stop_apache() { if silent_status then if kill $ApachePID then tries=0 while ProcessRunning $ApachePID && [ $tries -lt 10 ] do sleep 1 kill $ApachePID >/dev/null 2>&1 ocf_log info "Killing apache PID $ApachePID" tries=`expr $tries + 1` done else ocf_log warn "Killing apache PID $ApachePID FAILED." fi if ProcessRunning $ApachePID then ocf_log info "$CMD still running ($ApachePID)." false else ocf_log info "$CMD stopped." fi else ocf_log info "$CMD is not running." fi for sig in SIGTERM SIGHUP SIGKILL ; do if pgrep -f $HTTPD.*$CONFIGFILE >/dev/null 2>&1 ; then pkill -$sig -f $HTTPD.*$CONFIGFILE >/dev/null 2>&1 ocf_log info "apache children were signalled ($sig)" sleep 1 else break fi done } status_apache() { silent_status rc=$? if [ $rc -eq 0 ] then ocf_log info "$CMD is running (pid $ApachePID)." return $OCF_SUCCESS else ocf_log info "$CMD is stopped." return $OCF_NOT_RUNNING fi } monitor_apache() { if ! have_binary $WGET then ocf_log err "Monitoring not supported by $OCF_RESOURCE_INSTANCE" ocf_log info "Please make sure that wget is available" return $OCF_ERR_CONFIGURED elif [ -z "$STATUSURL" ]; then ocf_log err "Monitoring not supported by $CONFIGFILE" ocf_log info "Please set the statusurl parameter" return $OCF_ERR_CONFIGURED fi if silent_status then ocf_run sh -c "$WGET $WGETOPTS $STATUSURL | tr '\012' ' ' | grep -Ei \"$TESTREGEX\" >/dev/null" else ocf_log info "$CMD not running" return $OCF_NOT_RUNNING fi } metadata_apache(){ cat < 1.0 This is the resource agent for the Apache web server. Thie resource agent operates both version 1.x and version 2.x Apache servers. The start operation ends with a loop in which monitor is repeatedly called to make sure that the server started and that it is operational. Hence, if the monitor operation does not succeed within the start operation timeout, the apache resource will end with an error status. The monitor operation by default loads the server status page which depends on the mod_status module and the corresponding configuration file (usually /etc/apache2/mod_status.conf). Make sure that the server status page works and that the access is allowed *only* from localhost (address 127.0.0.1). See the statusurl and testregex attributes for more details. See also http://httpd.apache.org/ Apache web server The full pathname of the Apache configuration file. This file is parsed to provide defaults for various other resource agent parameters. configuration file path The full pathname of the httpd binary (optional). httpd binary path A port number that we can probe for status information using the statusurl. This will default to the port number found in the configuration file, or 80, if none can be found in the configuration file. httpd port The URL to monitor (the apache server status page by default). If left unspecified, it will be inferred from the apache configuration file. If you set this, make sure that it succeeds *only* from the localhost (127.0.0.1). Otherwise, it may happen that the cluster complains about the resource being active on multiple nodes. url name Regular expression to match in the output of statusurl. It is case insensitive. monitor regular expression Extra options to apply when starting apache. See man httpd(8). command line options Files (one or more) which contain extra environment variables, such as /etc/apache2/envvars. environment settings files END exit $OCF_SUCCESS } validate_all_apache() { if CheckPort $PORT; then # We are sure to succeed here, since we forced $PORT to be valid in GetParams() : OK else ocf_log err "Port number $PORT is invalid!" exit $OCF_ERR_ARGS fi if [ -z $STATUSURL ]; then : OK to be empty else case $STATUSURL in http://*/*) ;; *) ocf_log err "Invalid STATUSURL $STATUSURL" exit $OCF_ERR_ARGS ;; esac fi if [ ! -x $HTTPD ]; then ocf_log err "HTTPD $HTTPD not found or is not an executable!" exit $OCF_ERR_ARGS fi if [ ! -f $CONFIGFILE ]; then # We are sure to succeed here, since we have parsed $CONFIGFILE before getting here ocf_log err "Configuration file $CONFIGFILE not found!" exit $OCF_ERR_CONFIGURED fi return $OCF_SUCCESS } if [ $# -eq 1 ] then COMMAND=$1 HTTPD="$OCF_RESKEY_httpd" PORT="$OCF_RESKEY_port" STATUSURL="$OCF_RESKEY_statusurl" CONFIGFILE="$OCF_RESKEY_configfile" OPTIONS="$OCF_RESKEY_options" TESTREGEX=${OCF_RESKEY_testregex:-'[[:space:]]*'} source_envfiles $OCF_RESKEY_envfiles else usage $OCF_ERR_ARGS fi LSB_STATUS_STOPPED=3 if [ "X$HTTPD" = X -o ! -f "$HTTPD" -o ! -x "$HTTPD" ] then case $0 in *IBM*) HTTPD=$IBMHTTPD DefaultConfig=$DEFAULT_IBMCONFIG;; *) HTTPD= for h in $HTTPDLIST do if [ -f $h -a -x $h ] then HTTPD=$h break fi done # It is possible that we still do not have a valid httpd at this stage if [ -z "$HTTPD" ] then case $COMMAND in stop) exit $OCF_SUCCESS;; monitor) exit $OCF_NOT_RUNNING;; status) exit $LSB_STATUS_STOPPED;; meta-data) metadata_apache;; esac ocf_log err "No valid httpd found! Please revise your item" exit $OCF_ERR_INSTALLED fi # Let the user know that the $HTTPD used is not the one (s)he specified via $OCF_RESKEY_httpd if [ "X$OCF_RESKEY_httpd" != X ] then ocf_log info "Using $HTTPD as HTTPD" fi DefaultConfig=$DEFAULT_NORMCONFIG;; esac fi httpd_basename=`basename $HTTPD` case $httpd_basename in *-*) httpd_basename=`echo "$httpd_basename" | sed -e 's%\-.*%%'`;; esac case "$CONFIGFILE" in "") CONFIGFILE=$DefaultConfig;; *) ;; esac if [ ! -f "$CONFIGFILE" ] then case $COMMAND in stop) ocf_log warn "$CONFIGFILE not found - apache considered stopped" exit $OCF_SUCCESS;; monitor) exit $OCF_NOT_RUNNING;; status) exit $LSB_STATUS_STOPPED;; esac fi if [ "X$COMMAND" = Xmeta-data ] || GetParams $CONFIGFILE then : OK else ocf_log err "Cannot parse config file [$CONFIGFILE]" exit $OCF_ERR_CONFIGURED fi case $COMMAND in start) start_apache;; stop) stop_apache;; status) status_apache;; monitor) monitor_apache;; meta-data) metadata_apache;; validate-all) validate_all_apache;; *) usage $OCF_ERR_UNIMPLEMENTED;; esac