diff --git a/heartbeat/mysql b/heartbeat/mysql index 0b3c93097..1ca9281ef 100755 --- a/heartbeat/mysql +++ b/heartbeat/mysql @@ -1,1084 +1,1084 @@ #!/bin/sh # # # MySQL # # Description: Manages a MySQL database as Linux-HA resource # # Authors: Alan Robertson: DB2 Script # Jakub Janczak: rewrite as MySQL # Andrew Beekhof: cleanup and import # Sebastian Reitenbach: add OpenBSD defaults, more cleanup # Narayan Newton: add Gentoo/Debian defaults # Marian Marinov, Florian Haas: add replication capability # # Support: linux-ha@lists.linux-ha.org # License: GNU General Public License (GPL) # # (c) 2002-2005 International Business Machines, Inc. # 2005-2010 Linux-HA contributors # # An example usage in /etc/ha.d/haresources: # node1 10.0.0.170 mysql # # See usage() function below for more details... # # OCF instance parameters: # OCF_RESKEY_binary # OCF_RESKEY_client_binary # OCF_RESKEY_config # OCF_RESKEY_datadir # OCF_RESKEY_user # OCF_RESKEY_group # OCF_RESKEY_test_table # OCF_RESKEY_test_user # OCF_RESKEY_test_passwd # OCF_RESKEY_enable_creation # OCF_RESKEY_additional_parameters # OCF_RESKEY_log # OCF_RESKEY_pid # OCF_RESKEY_socket ####################################################################### # Initialization: : ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat} . ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs ####################################################################### # Fill in some defaults if no values are specified HOSTOS=`uname` if [ "X${HOSTOS}" = "XOpenBSD" ];then OCF_RESKEY_binary_default="/usr/local/bin/mysqld_safe" OCF_RESKEY_config_default="/etc/my.cnf" OCF_RESKEY_datadir_default="/var/mysql" OCF_RESKEY_user_default="_mysql" OCF_RESKEY_group_default="_mysql" OCF_RESKEY_log_default="/var/log/mysqld.log" OCF_RESKEY_pid_default="/var/mysql/mysqld.pid" OCF_RESKEY_socket_default="/var/run/mysql/mysql.sock" else OCF_RESKEY_binary_default="/usr/bin/safe_mysqld" OCF_RESKEY_config_default="/etc/my.cnf" OCF_RESKEY_datadir_default="/var/lib/mysql" OCF_RESKEY_user_default="mysql" OCF_RESKEY_group_default="mysql" OCF_RESKEY_log_default="/var/log/mysqld.log" OCF_RESKEY_pid_default="/var/run/mysql/mysqld.pid" OCF_RESKEY_socket_default="/var/lib/mysql/mysql.sock" fi OCF_RESKEY_client_binary_default="mysql" OCF_RESKEY_test_user_default="root" OCF_RESKEY_test_table_default="mysql.user" OCF_RESKEY_test_passwd_default="" OCF_RESKEY_enable_creation_default=0 OCF_RESKEY_additional_parameters_default="" OCF_RESKEY_replication_port_default="3306" OCF_RESKEY_max_slave_lag_default="3600" OCF_RESKEY_evict_outdated_slaves_default="false" : ${OCF_RESKEY_binary=${OCF_RESKEY_binary_default}} MYSQL_BINDIR=`dirname ${OCF_RESKEY_binary}` : ${OCF_RESKEY_client_binary=${OCF_RESKEY_client_binary_default}} : ${OCF_RESKEY_config=${OCF_RESKEY_config_default}} : ${OCF_RESKEY_datadir=${OCF_RESKEY_datadir_default}} : ${OCF_RESKEY_user=${OCF_RESKEY_user_default}} : ${OCF_RESKEY_group=${OCF_RESKEY_group_default}} : ${OCF_RESKEY_log=${OCF_RESKEY_log_default}} : ${OCF_RESKEY_pid=${OCF_RESKEY_pid_default}} : ${OCF_RESKEY_socket=${OCF_RESKEY_socket_default}} : ${OCF_RESKEY_test_user=${OCF_RESKEY_test_user_default}} : ${OCF_RESKEY_test_table=${OCF_RESKEY_test_table_default}} : ${OCF_RESKEY_test_passwd=${OCF_RESKEY_test_passwd_default}} : ${OCF_RESKEY_enable_creation=${OCF_RESKEY_enable_creation_default}} : ${OCF_RESKEY_additional_parameters=${OCF_RESKEY_additional_parameters_default}} : ${OCF_RESKEY_replication_user=${OCF_RESKEY_replication_user_default}} : ${OCF_RESKEY_replication_passwd=${OCF_RESKEY_replication_passwd_default}} : ${OCF_RESKEY_replication_port=${OCF_RESKEY_replication_port_default}} : ${OCF_RESKEY_max_slave_lag=${OCF_RESKEY_max_slave_lag_default}} : ${OCF_RESKEY_evict_outdated_slaves=${OCF_RESKEY_evict_outdated_slaves_default}} ####################################################################### usage() { cat < 1.0 Resource script for MySQL. May manage a standalone MySQL database, a clone set with externally managed replication, or a complete master/slave replication setup. Manages a MySQL database instance Location of the MySQL server binary MySQL server binary Location of the MySQL client binary MySQL client binary Configuration file MySQL config Directory containing databases MySQL datadir User running MySQL daemon MySQL user Group running MySQL daemon (for logfile and directory permissions) MySQL group The logfile to be used for mysqld. MySQL log file The pidfile to be used for mysqld. MySQL pid file The socket to be used for mysqld. MySQL socket Table to be tested in monitor statement (in database.table notation) MySQL test table MySQL test user MySQL test user MySQL test user password MySQL test user password If the MySQL database does not exist, it will be created Create the database if it does not exist Additional parameters which are passed to the mysqld on startup. (e.g. --skip-external-locking or --skip-grant-tables) Additional parameters to pass to mysqld MySQL replication user. This user is used for starting and stopping MySQL replication, for setting and resetting the master host, and for setting and unsetting read-only mode. Because of that, this user must have SUPER, REPLICATION SLAVE, REPLICATION CLIENT, and PROCESS privileges on all nodes within the cluster. MySQL replication user MySQL replication password. Used for replication client and slave. MySQL replication user password The port on which the Master MySQL instance is listening. MySQL replication port The maximum number of seconds a replication slave is allowed to lag behind its master. Do not set this to zero. What the cluster manager does in case a slave exceeds this maximum lag is determined by the evict_outdated_slaves parameter. Maximum time (seconds) a MySQL slave is allowed to lag behind a master If set to true, any slave which is more than max_slave_lag seconds behind the master has its MySQL instance shut down. If this parameter is set to false in a primitive or clone resource, it is simply ignored. If set to false in a master/slave resource, then exceeding the maximum slave lag will merely push down the master preference so the lagging slave is never promoted to the new master. Determines whether to shut down badly lagging slaves END } ####################################################################### # Convenience variables MYSQL=$OCF_RESKEY_client_binary MYSQL_OPTIONS_LOCAL="-S $OCF_RESKEY_socket --connect_timeout=10" MYSQL_OPTIONS_REPL="--user=$OCF_RESKEY_replication_user --password=$OCF_RESKEY_replication_passwd" CRM_MASTER="${HA_SBIN_DIR}/crm_master -l reboot " HOSTNAME=`uname -n` CRM_ATTR="${HA_SBIN_DIR}/crm_attribute -N $HOSTNAME -l forever" INSTANCE_ATTR_NAME=`echo ${OCF_RESOURCE_INSTANCE}| awk -F : '{print $1}'` ####################################################################### # Convenience functions set_read_only() { # Sets or unsets read-only mode. Accepts one boolean as its # optional argument. If invoked without any arguments, defaults to # enabling read only mode. Should only be set in master/slave # setups. # Returns $OCF_SUCCESS if the operation succeeds, or # $OCF_ERR_GENERIC if it fails. local ro_val if ocf_is_true $1; then ro_val="on" else ro_val="off" fi local mysql_options mysql_options="$MYSQL_OPTIONS_LOCAL" if [ -n $OCF_RESKEY_replication_user ]; then mysql_options="$mysql_options $MYSQL_OPTIONS_REPL" fi ocf_run $MYSQL $mysql_options \ -e "SET GLOBAL read_only=${ro_val}" } get_read_only() { # Check if read-only is set local mysql_options local read_only_state mysql_options="$MYSQL_OPTIONS_LOCAL" if [ -n $OCF_RESKEY_replication_user ]; then mysql_options="$mysql_options $MYSQL_OPTIONS_REPL" fi read_only_state=`$MYSQL $mysql_options \ -e "SHOW VARIABLES" | grep read_only | awk '{print $2}'` if [ "$read_only_state" = "ON" ]; then return 0 else return 1 fi } is_slave() { # Determine whether the machine is currently running as a MySQL # slave, as determined per SHOW SLAVE STATUS. Returns 1 if SHOW # SLAVE STATUS creates an empty result set, 0 otherwise. local rc local tmpfile local mysql_options # Check whether this machine should be slave if ! ocf_is_ms || ! get_read_only; then return 1; fi tmpfile=`mktemp ${HA_RSCTMP}/is_slave.${OCF_RESOURCE_INSTANCE}.XXXXXX` mysql_options="$MYSQL_OPTIONS_LOCAL $MYSQL_OPTIONS_REPL" $MYSQL $mysql_options \ -e 'SHOW SLAVE STATUS\G' > $tmpfile # "SHOW SLAVE STATUS" returns an empty set if instance is not a # replication slave if [ -s $tmpfile ]; then rm -f $tmpfile return 0 fi rm -f $tmpfile return 1 } parse_slave_info() { # Extracts field $1 from result of "SHOW SLAVE STATUS\G" from file $2 sed -ne "s/^.* $1: \(.*\)$/\1/p" < $2 } get_slave_info() { # Warning: this sets $tmpfile and LEAVE this file! You must delete it after use! local mysql_options tmpfile=`mktemp ${HA_RSCTMP}/check_slave.${OCF_RESOURCE_INSTANCE}.XXXXXX` mysql_options="$MYSQL_OPTIONS_LOCAL $MYSQL_OPTIONS_REPL" $MYSQL $mysql_options \ -e 'SHOW SLAVE STATUS\G' > $tmpfile if [ -s $tmpfile ]; then master_host=`parse_slave_info Master_Host $tmpfile` master_user=`parse_slave_info Master_User $tmpfile` master_port=`parse_slave_info Master_Port $tmpfile` master_log_file=`parse_slave_info Master_Log_File $tmpfile` master_log_pos=`parse_slave_info Read_Master_Log_Pos $tmpfile` slave_sql=`parse_slave_info Slave_SQL_Running $tmpfile` slave_io=`parse_slave_info Slave_IO_Running $tmpfile` last_errno=`parse_slave_info Last_Errno $tmpfile` secs_behind=`parse_slave_info Seconds_Behind_Master $tmpfile` ocf_log debug "MySQL instance running as a replication slave" else # Instance produced an empty "SHOW SLAVE STATUS" output -- # instance is not a slave ocf_log err "check_slave invoked on an instance that is not a replication slave." return $OCF_ERR_GENERIC fi return $OCF_SUCCESS } check_slave() { # Checks slave status local rc get_slave_info rc=$? if [ $rc -eq 0 ]; then if [ $last_errno -ne 0 ]; then # Whoa. Replication ran into an error. This slave has # diverged from its master. Make sure this resource # doesn't restart in place. ocf_log err "MySQL instance configured for replication, but replication has failed." ocf_log err "See $tmpfile for details" exit $OCF_ERR_INSTALLED fi if [ "$slave_io" != 'Yes' ]; then # Not necessarily a bad thing. The master may have # temporarily shut down, and the slave may just be # reconnecting. A warning can't hurt, though. ocf_log warn "MySQL Slave IO threads currently not running." fi if [ "$slave_sql" != 'Yes' ]; then # We don't have a replication SQL thread running. Not a # good thing. Try to recoved by restarting the resource in # place. ocf_log err "MySQL Slave SQL threads currently not running." ocf_log err "See $tmpfile for details" exit $OCF_ERR_GENERIC fi if ocf_is_true $OCF_RESKEY_evict_outdated_slaves; then # We're supposed to bail out if we lag too far # behind. Let's check our lag. if [ $secs_behind -gt $OCF_RESKEY_max_slave_lag ]; then ocf_log err "MySQL Slave is $secs_behind seconds behind master (allowed maximum: $OCF_RESKEY_max_slave_lag)." ocf_log err "See $tmpfile for details" exit $OCF_ERR_INSTALLED fi elif ocf_is_ms; then # Even if we're not set to evict lagging slaves, we can # still use the seconds behind master value to set our # master preference. local master_pref master_pref=$((${OCF_RESKEY_max_slave_lag}-${secs_behind})) if [ $master_pref -lt 0 ]; then # Sanitize a below-zero preference to just zero master_pref=0 fi $CRM_MASTER -v $master_pref fi ocf_log debug "MySQL instance running as a replication slave" rm -f $tmpfile else # Instance produced an empty "SHOW SLAVE STATUS" output -- # instance is not a slave rm -f $tmpfile ocf_log err "check_slave invoked on an instance that is not a replication slave." exit $OCF_ERR_GENERIC fi } set_master() { local new_master_host master_log_file master_log_pos local master_params new_master_host=$1 # Keep replication position get_slave_info if [ "$master_log_file" -a "$new_master_host" = "$master_host" ]; then # master_params=", MASTER_LOG_FILE='$master_log_file', \ # MASTER_LOG_POS=$master_log_pos" ocf_log info "Kept master pos for $master_host : $master_log_file:$master_log_pos" rm -f $tmpfile return else master_log_file=`$CRM_ATTR -n $new_master_host-log-file-${INSTANCE_ATTR_NAME} -q -G` master_log_pos=`$CRM_ATTR -n $new_master_host-log-pos-${INSTANCE_ATTR_NAME} -q -G` if [ -n "$master_log_file" -a -n "$master_log_pos" ]; then master_params=", MASTER_LOG_FILE='$master_log_file', \ MASTER_LOG_POS=$master_log_pos" ocf_log info "Restored master pos for $new_master_host : $master_log_file:$master_log_pos" fi fi # Informs the MySQL server of the master to replicate # from. Accepts one mandatory argument which must contain the host # name of the new master host. The master must either be unchanged # from the laste master the slave replicated from, or freshly # reset with RESET MASTER. ocf_run $MYSQL $MYSQL_OPTIONS_LOCAL $MYSQL_OPTIONS_REPL \ -e "CHANGE MASTER TO MASTER_HOST='$new_master_host', \ MASTER_USER='$OCF_RESKEY_replication_user', \ MASTER_PASSWORD='$OCF_RESKEY_replication_passwd' $master_params" rm -f $tmpfile } unset_master(){ # Instructs the MySQL server to stop replicating from a master # host. # If we're currently not configured to be replicating from any # host, then there's nothing to do. But we do log a warning as # no-one but the CRM should be touching the MySQL master/slave # configuration. if ! is_slave; then ocf_log warn "Attempted to unset the replication master on an instance that is not configured as a replication slave" return $OCF_SUCCESS fi local mysql_options mysql_options="$MYSQL_OPTIONS_LOCAL $MYSQL_OPTIONS_REPL" local tmpfile tmpfile=`mktemp ${HA_RSCTMP}/unset_master.${OCF_RESOURCE_INSTANCE}.XXXXXX` # First, stop the slave I/O thread and wait for relay log # processing to complete ocf_run $MYSQL $mysql_options \ -e "STOP SLAVE IO_THREAD" if [ $? -gt 0 ]; then ocf_log err "Error stopping slave IO thread" exit $OCF_ERR_GENERIC fi while true; do $MYSQL $mysql_options \ -e 'SHOW PROCESSLIST\G' > $tmpfile - if grep 'Has read all relay log' $tmpfile >/dev/null; then + if grep '[Hh]as read all relay log' $tmpfile >/dev/null; then ocf_log info "MySQL slave has finished processing relay log" break fi if ! grep -q 'system user' $tmpfile; then ocf_log info "Slave not runnig - not waiting to finish" break fi ocf_log info "Waiting for MySQL slave to finish processing relay log" sleep 1 done rm -f $tmpfile # Now, stop all slave activity and unset the master host ocf_run $MYSQL $mysql_options \ -e "STOP SLAVE" if [ $? -gt 0 ]; then ocf_log err "Error stopping rest slave threads" exit $OCF_ERR_GENERIC fi #Save current state get_slave_info $CRM_ATTR -n $master_host-log-file-${INSTANCE_ATTR_NAME} -v $master_log_file $CRM_ATTR -n $master_host-log-pos-${INSTANCE_ATTR_NAME} -v $master_log_pos rm -f $tmpfile ocf_run $MYSQL $mysql_options \ -e "CHANGE MASTER TO MASTER_HOST=''" if [ $? -gt 0 ]; then ocf_log err "Failed to set master" exit $OCF_ERR_GENERIC fi } # Start replication as slave. Master hostname as parameter start_slave() { local master_host master_host="$1" # Remove state attributes - it will be invalid after START SLAVE $CRM_ATTR -n $master_host-log-file-${INSTANCE_ATTR_NAME} -D $CRM_ATTR -n $master_host-log-pos-${INSTANCE_ATTR_NAME} -D ocf_run $MYSQL $MYSQL_OPTIONS_LOCAL $MYSQL_OPTIONS_REPL \ -e "START SLAVE" } ####################################################################### # Functions invoked by resource manager actions mysql_validate() { check_binary $OCF_RESKEY_binary check_binary $OCF_RESKEY_client_binary if [ ! -f $OCF_RESKEY_config ]; then ocf_log err "Config $OCF_RESKEY_config doesn't exist"; return $OCF_ERR_INSTALLED; fi if [ ! -d $OCF_RESKEY_datadir ]; then ocf_log err "Datadir $OCF_RESKEY_datadir doesn't exist"; return $OCF_ERR_INSTALLED; fi getent passwd $OCF_RESKEY_user >/dev/null 2>&1 if [ ! $? -eq 0 ]; then ocf_log err "User $OCF_RESKEY_user doesn't exit"; return $OCF_ERR_INSTALLED; fi getent group $OCF_RESKEY_group >/dev/null 2>&1 if [ ! $? -eq 0 ]; then ocf_log err "Group $OCF_RESKEY_group doesn't exist"; return $OCF_ERR_INSTALLED; fi true } mysql_status() { # Set the log level of the error message (default:err) local loglevel loglevel=${1:-err} if [ ! -e $OCF_RESKEY_pid ]; then ocf_log $loglevel "MySQL is not running" return $OCF_NOT_RUNNING; fi pid=`cat $OCF_RESKEY_pid`; if [ -d /proc -a -d /proc/1 ]; then [ "u$pid" != "u" -a -d /proc/$pid ] else kill -s 0 $pid >/dev/null 2>&1 fi if [ $? -eq 0 ]; then return $OCF_SUCCESS; else ocf_log $loglevel "MySQL not running: removing old PID file" rm -f $OCF_RESKEY_pid return $OCF_NOT_RUNNING; fi } mysql_monitor() { local rc local status_loglevel="err" # Set loglevel to info during probe if ocf_is_probe; then status_loglevel="info" fi mysql_status $status_loglevel rc=$? # If status returned an error, return that immediately if [ $rc -ne $OCF_SUCCESS ]; then return $rc fi if [ $OCF_CHECK_LEVEL -gt 0 -a -n "$OCF_RESKEY_test_table" ]; then # Check if this instance is configured as a slave, and if so # check slave status if is_slave; then check_slave fi local mysql_options mysql_options="$MYSQL_OPTIONS_LOCAL --user=$OCF_RESKEY_test_user --password=$OCF_RESKEY_test_passwd" # Check for test table ocf_run -q $MYSQL $mysql_options \ -e "SELECT COUNT(*) FROM $OCF_RESKEY_test_table" rc=$? if [ $rc -ne 0 ]; then ocf_log err "Failed to select from $OCF_RESKEY_test_table"; return $OCF_ERR_GENERIC; fi fi if ocf_is_ms && ! get_read_only; then ocf_log debug "MySQL monitor succeeded (master)"; return $OCF_RUNNING_MASTER else ocf_log debug "MySQL monitor succeeded"; return $OCF_SUCCESS fi } mysql_start() { mysql_status info if [ $? = $OCF_SUCCESS ]; then ocf_log info "MySQL already running" return $OCF_SUCCESS fi touch $OCF_RESKEY_log chown $OCF_RESKEY_user:$OCF_RESKEY_group $OCF_RESKEY_log chmod 0640 $OCF_RESKEY_log [ -x /sbin/restorecon ] && /sbin/restorecon $OCF_RESKEY_log if ocf_is_true "$OCF_RESKEY_enable_creation" && [ ! -d $OCF_RESKEY_datadir/mysql ] ; then ocf_log info "Initializing MySQL database: " $MYSQL_BINDIR/mysql_install_db --datadir=$OCF_RESKEY_datadir rc=$? if [ $rc -ne 0 ] ; then ocf_log err "Initialization failed: $rc"; exit $OCF_ERR_GENERIC fi chown -R $OCF_RESKEY_user:$OCF_RESKEY_group $OCF_RESKEY_datadir fi pid_dir=`dirname $OCF_RESKEY_pid` if [ ! -d $pid_dir ] ; then ocf_log info "Creating PID dir: $pid_dir" mkdir -p $pid_dir chown $OCF_RESKEY_user:$OCF_RESKEY_group $pid_dir fi socket_dir=`dirname $OCF_RESKEY_socket` if [ ! -d $socket_dir ] ; then ocf_log info "Creating socket dir: $socket_dir" mkdir -p $socket_dir chown $OCF_RESKEY_user:$OCF_RESKEY_group $socket_dir fi # Regardless of whether we just created the directory or it # already existed, check whether it is writable by the configured # user for dir in $pid_dir $socket_dir; do if ! su -s /bin/sh - $OCF_RESKEY_user -c "test -w $dir"; then ocf_log err "Directory $dir is not writable by $OCF_RESKEY_user" exit $OCF_ERR_PERM; fi done # Uncomment to perform permission clensing # - not convinced this should be enabled by default # #chmod 0755 $OCF_RESKEY_datadir #chown -R $OCF_RESKEY_user $OCF_RESKEY_datadir #chgrp -R $OCF_RESKEY_group $OCF_RESKEY_datadir mysql_extra_params= if ocf_is_ms; then mysql_extra_params="--skip-slave-start" fi ${OCF_RESKEY_binary} --defaults-file=$OCF_RESKEY_config \ --pid-file=$OCF_RESKEY_pid \ --socket=$OCF_RESKEY_socket \ --datadir=$OCF_RESKEY_datadir \ --user=$OCF_RESKEY_user $OCF_RESKEY_additional_parameters \ $mysql_extra_params >/dev/null 2>&1 & rc=$? if [ $rc != 0 ]; then ocf_log err "MySQL start command failed: $rc" return $rc fi # Spin waiting for the server to come up. # Let the CRM/LRM time us out if required. start_wait=1 while [ $start_wait = 1 ]; do mysql_status info rc=$? if [ $rc = $OCF_SUCCESS ]; then start_wait=0 elif [ $rc != $OCF_NOT_RUNNING ]; then ocf_log err "MySQL start failed: $rc" return $rc fi sleep 2 done if ocf_is_ms; then # We're configured as a stateful resource. We must start as # slave by default. At this point we don't know if the CRM has # already promoted a master. So, we simply start in read only # mode. set_read_only on # Now, let's see whether there is a master. We might be a new # node that is just joining the cluster, and the CRM may have # promoted a master before. master_host=`echo $OCF_RESKEY_CRM_meta_notify_master_uname|tr -d " "` if [ "$master_host" -a "$master_host" != ${HOSTNAME} ]; then ocf_log info "Changing MySQL configuration to replicate from $master_host." set_master $master_host ocf_run $MYSQL $MYSQL_OPTIONS_LOCAL $MYSQL_OPTIONS_REPL \ -e 'START SLAVE' if [ $? -ne 0 ]; then ocf_log err "Failed to start slave" return $OCF_ERR_GENERIC fi else ocf_log info "No MySQL master present, clearing replication state" unset_master fi master_host=`echo $OCF_RESKEY_CRM_meta_notify_master_uname` if [ "$master_host" -a "$master_host" != ${HOSTNAME} ]; then ocf_log info "Changing MySQL configuration to replicate from $master_host." set_master $master_host start_slave $master_host if [ $? -ne 0 ]; then ocf_log err "Failed to start slave" return $OCF_ERR_GENERIC fi else ocf_log info "No MySQL master present - clearing replication state" unset_master fi # We also need to set a master preference, otherwise Pacemaker # won't ever promote us in the absence of any explicit # preference set by the administrator. We choose a low # greater-than-zero preference. $CRM_MASTER -v 1 fi # Initial monitor action if [ -n "$OCF_RESKEY_test_table" -a -n "$OCF_RESKEY_test_user" -a -n "$OCF_RESKEY_test_passwd" ]; then OCF_CHECK_LEVEL=10 fi mysql_monitor rc=$? if [ $rc != $OCF_SUCCESS -a $rc != $OCF_RUNNING_MASTER ]; then ocf_log err "Failed initial monitor action" return $rc fi ocf_log info "MySQL started" return $OCF_SUCCESS } mysql_stop() { if ocf_is_ms; then # clear preference for becoming master $CRM_MASTER -D fi mysql_status info rc=$? if [ $rc = $OCF_NOT_RUNNING ]; then return $OCF_SUCCESS fi pid=`cat $OCF_RESKEY_pid 2> /dev/null ` /bin/kill $pid > /dev/null rc=$? if [ $rc != 0 ]; then ocf_log err "MySQL couldn't be stopped" return $OCF_ERR_GENERIC fi # stop waiting shutdown_timeout=15 if [ -n "$OCF_RESKEY_CRM_meta_timeout" ]; then shutdown_timeout=$((($OCF_RESKEY_CRM_meta_timeout/1000)-5)) fi count=0 while [ $count -lt $shutdown_timeout ]; do mysql_status info rc=$? if [ $rc = $OCF_NOT_RUNNING ]; then break fi count=`expr $count + 1` sleep 1 ocf_log info "MySQL still hasn't stopped yet. Waiting..." done mysql_status info if [ $? != $OCF_NOT_RUNNING ]; then ocf_log warn "MySQL failed to stop after ${shutdown_timeout}s using SIGTERM. Trying SIGKILL..." /bin/kill -KILL $pid > /dev/null fi ocf_log info "MySQL stopped"; rm -f /var/lock/subsys/mysqld rm -f $OCF_RESKEY_socket return $OCF_SUCCESS } mysql_promote() { if ( ! mysql_status ); then return $OCF_NOT_RUNNING fi ocf_run $MYSQL $MYSQL_OPTIONS_LOCAL $MYSQL_OPTIONS_REPL \ -e "STOP SLAVE" set_read_only off || return $OCF_ERR_GENERIC # Existing master gets a higher-than-default master preference, so # the cluster manager does not shuffle the master role around # unnecessarily $CRM_MASTER -v $((${OCF_RESKEY_max_slave_lag}+1)) return $OCF_SUCCESS } mysql_demote() { if ! mysql_status; then return $OCF_NOT_RUNNING fi set_read_only on if [ $? -ne 0 ]; then ocf_log err "Failed to set read-only"; return $OCF_ERR_GENERIC; fi # Return master preference to default, so the cluster manager gets # a chance to select a new master $CRM_MASTER -v 1 } mysql_notify() { # If not configured as a Stateful resource, we make no sense of # notifications. if ! ocf_is_ms; then ocf_log info "This agent makes no use of notifications unless running in master/slave mode." return $OCF_SUCCESS fi local type_op type_op="${OCF_RESKEY_CRM_meta_notify_type}-${OCF_RESKEY_CRM_meta_notify_operation}" ocf_log debug "Received $type_op notification." case "$type_op" in 'pre-promote') # A new master is about to being promoted. It's not in # read-write mode yet (that only occurs when it actually # executes the promote action), so we can now safely # connect to it and wait for it to start replicating. local master_host local master_status master_host=`echo $OCF_RESKEY_CRM_meta_notify_promote_uname` if ( ! mysql_status ); then return $OCF_NOT_RUNNING fi if [ -z "$master_host" ]; then ocf_log err "Unable to determine master host!" return $OCF_ERR_GENERIC fi if [ $master_host = ${HOSTNAME} ]; then ocf_log info "This will be new master" else ocf_log info "Changing MySQL configuration to replicate from $master_host" set_master $master_host if [ $? -ne 0 ]; then return $OCF_ERR_GENERIC else return $OCF_SUCCESS fi fi ;; 'post-promote') # The master has completed its promotion. Now is a good # time to check whether our replication slave is working # correctly. master_host=`echo $OCF_RESKEY_CRM_meta_notify_promote_uname` if [ "$master_host" = ${HOSTNAME} ]; then ocf_log info "Ignoring post-promote notification for my own promotion." return $OCF_SUCCESS fi start_slave $master_host if [ $? -ne 0 ]; then ocf_log err "Failed to start slave" return $OCF_ERR_GENERIC fi ;; 'post-demote') demote_host=`echo $OCF_RESKEY_CRM_meta_notify_demote_uname` if [ $demote_host = ${HOSTNAME} ]; then ocf_log info "Ignoring post-demote notification for my own demotion." return $OCF_SUCCESS fi ocf_log info "post-demote notification for $demote_host." # The former master has just been gracefully demoted. unset_master ;; *) return $OCF_SUCCESS ;; esac } ####################################################################### case "$1" in meta-data) meta_data exit $OCF_SUCCESS;; usage|help) usage exit $OCF_SUCCESS;; esac mysql_validate rc=$? LSB_STATUS_STOPPED=3 if [ $rc -ne 0 ]; then case "$1" in stop) exit $OCF_SUCCESS;; monitor) exit $OCF_NOT_RUNNING;; status) exit $LSB_STATUS_STOPPED;; *) exit $rc;; esac fi # What kind of method was invoked? case "$1" in start) mysql_start;; stop) mysql_stop;; status) mysql_status;; monitor) mysql_monitor;; promote) mysql_promote;; demote) mysql_demote;; notify) mysql_notify;; validate-all) exit $OCF_SUCCESS;; *) usage exit $OCF_ERR_UNIMPLEMENTED;; esac