#!/bin/sh # # # lvmlockd OCF Resource Agent # # Copyright (c) 2017 SUSE LINUX, Eric Ren # All Rights Reserved. # # This program is free software; you can redistribute it and/or modify # it under the terms of version 2 of the GNU General Public License as # published by the Free Software Foundation. # # This program is distributed in the hope that it would be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. # # Further, this software is distributed without any warranty that it is # free of the rightful claim of any third person regarding infringement # or the like. Any license provided herein, whether implied or # otherwise, applies only to this software file. Patent licenses, if # any, provided herein do not apply to combinations of this program with # other software, or any other product whatsoever. # # You should have received a copy of the GNU General Public License # along with this program; if not, write the Free Software Foundation, # Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. # ####################################################################### # Initialization: : ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat} . ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs # Parameter defaults OCF_RESKEY_pidfile_default="/run/lvmlockd.pid" OCF_RESKEY_socket_path_default="/run/lvm/lvmlockd.socket" OCF_RESKEY_syslog_priority_default="warning" OCF_RESKEY_adopt_default="1" : ${OCF_RESKEY_pidfile=${OCF_RESKEY_pidfile_default}} : ${OCF_RESKEY_socket_path=${OCF_RESKEY_socket_path_default}} : ${OCF_RESKEY_syslog_priority=${OCF_RESKEY_syslog_priority_default}} : ${OCF_RESKEY_adopt=${OCF_RESKEY_adopt_default}} ####################################################################### meta_data() { cat < 1.0 This agent manages the lvmlockd daemon. "lvmlockd" is like "clvmd". Both are used by LVM commands to coordinate access to shared storage, but with different design and implementations. "lvmlockd" can use two lock managers: dlm and sanlock. This agent only supports "dlm + lvmlockd". If dlm (or corosync) are already being used by other cluster software, you are advised to select dlm, then configure "controld" resource agent for dlm and this agent for "lvmlockd". Otherwise, consider sanlock for "lvmlockd" if dlm/corosync is not required. Using lvmlockd requires the settings in LVM configuration file (/etc/lvm/lvm.conf): "locking_type = 1" and "use_lvmlockd = 1". This RA will change the settings respectively if needed. For more information, refer to manpage lvmlockd.8. This agent manages the lvmlockd daemon pid file pid file Set the socket path to listen on. socket path Write log messages from this level up to syslog. syslog priority Adopt locks from a previous instance of lvmlockd. Adopt locks from a previous instance of lvmlockd END } ####################################################################### LOCKD="lvmlockd" # 0.5s sleep each count TIMEOUT_COUNT=20 usage() { cat </dev/null 2>&1 fi } silent_status() { local pid=$(get_pid) if [ -n "$pid" ] ; then daemon_is_running "$pid" rc=$? mirror_rc=$rc # If these ever don't match, return error to force recovery if [ $mirror_rc -ne $rc ]; then return $OCF_ERR_GENERIC fi return $rc else # No pid file false fi } # change /etc/lvm/lvm.conf to use lvmlockd setup_lvm_config() { local out="" local use_lvmlockd="" local lock_type="" # To use lvmlockd, ensure configure lvm.conf: # locking_type = 1 # use_lvmlockd = 1 out=$(lvmconfig 'global/use_lvmlockd' 2> /dev/null) use_lvmlockd=$(echo "$out" | cut -d'=' -f2) out=$(lvmconfig 'global/locking_type' 2> /dev/null) lock_type=$(echo "$out" | cut -d'=' -f2) if [ -n "$use_lvmlockd" ] && [ "$use_lvmlockd" != 1 ] ; then ocf_log info "setting \"use_lvmlockd=1\" in /etc/lvm/lvm.conf ..." sed -i 's,^[[:blank:]]*use_lvmlockd[[:blank:]]*=.*,\ \ \ \ use_lvmlockd = 1,g' /etc/lvm/lvm.conf fi if [ -n "$lock_type" ] ; then # locking_type was removed from config in v2.03 ocf_version_cmp "$(lvmconfig --version | awk '/LVM ver/ {sub(/\(.*/, "", $3); print $3}')" "2.03" case "$?" in 1|2) ocf_log info "removing \"locking_type\" from /etc/lvm/lvm.conf ..." sed -i '/^[[:blank:]]*locking_type[[:blank:]]*=.*/d' /etc/lvm/lvm.conf ;; 0) if [ "$lock_type" != 1 ] ; then ocf_log info "setting \"locking_type=1\" in /etc/lvm/lvm.conf ..." sed -i 's,^[[:blank:]]*locking_type[[:blank:]]*=.*,\ \ \ \ locking_type = 1,g' /etc/lvm/lvm.conf fi ;; esac fi return $OCF_SUCCESS } check_dlm_controld() { local pid="" # dlm daemon should have only one instance, but for safe... pid=$(pgrep dlm_controld | head -n1) if ! daemon_is_running $pid ; then ocf_exit_reason "DLM is not running. Is it configured?" exit $OCF_ERR_CONFIGURED fi return $OCF_SUCCESS } lvmlockd_start() { local extras="" setup_lvm_config ocf_log info "checking if DLM is started first..." check_dlm_controld if silent_status ; then ocf_log info "${LOCKD} already started (pid=$(get_pid))" return $OCF_SUCCESS fi if [ ! -z "$OCF_RESKEY_socket_path" ] ; then extras="$extras -s ${OCF_RESKEY_socket_path}" fi if [ ! -z "$OCF_RESKEY_syslog_priority" ] ; then extras="$extras -S ${OCF_RESKEY_syslog_priority}" fi if [ ! -z "$OCF_RESKEY_adopt" ] ; then extras="$extras -A ${OCF_RESKEY_adopt}" else # Inside lvmlockd daemon, this option defaults to 0. But, we # want it defaults to 1 for resource agent. When RA monitor pulls # this daemon up, we expect it to adopt locks from a previous # instance of lvmlockd. extras="$extras -A 1" fi # This client only support "dlm" lock manager extras="$extras -g dlm" ocf_log info "starting ${LOCKD}..." ocf_run ${LOCKD} -p ${OCF_RESKEY_pidfile} $extras rc=$? if [ $rc -ne $OCF_SUCCESS ] ; then ocf_exit_reason "Failed to start ${LOCKD}, exit code: $rc" return $OCF_ERR_GENERIC fi return $OCF_SUCCESS } # Each shared VG has its own lockspace. Besides, lvm_global lockspace # is for global use, and it should be the last one to close. It should # be enough to only check on lvm_global. wait_lockspaces_close() { local retries=0 ocf_log info "Waiting for all lockspaces to be closed" while [ $retries -lt "$TIMEOUT_COUNT" ] do if ! dlm_tool ls lvm_global | grep -Eqs "^name[[:space:]]+lvm_global" ; then return $OCF_SUCCESS fi sleep 0.5 retries=$((retries + 1)) done ocf_exit_reason "Failed to close all lockspaces clearly" exit $OCF_ERR_GENERIC } kill_stop() { local proc=$1 local pid=$2 local retries=0 ocf_log info "Killing $proc (pid=$pid)" while daemon_is_running $pid && [ $retries -lt "$TIMEOUT_COUNT" ] do if [ $retries -ne 0 ] ; then # don't sleep on the first try sleep 0.5 fi kill -s TERM $pid >/dev/null 2>&1 retries=$((retries + 1)) done } lvmlockd_stop() { local pid="" if ! silent_status ; then ocf_log info "${LOCKD} is not running" return $OCF_SUCCESS fi if [ -n "$(dlm_tool ls)" ]; then # We are going to stop lvmlockd, at this moment, we hope all shared VG have # been deactivated, otherwise we are in trouble: the stop action will fail! ocf_log info "stop the lockspaces of shared VG(s)..." ocf_run lvmlockctl --stop-lockspaces rc=$? if [ $rc -ne $OCF_SUCCESS ] ; then ocf_exit_reason "Failed to close lockspace, exit code: $rc" return $OCF_ERR_GENERIC fi fi wait_lockspaces_close pid=$(get_pid) kill_stop $LOCKD $pid if silent_status ; then ocf_exit_reason "Failed to stop, ${LOCKD} still running." return $OCF_ERR_GENERIC fi return $OCF_SUCCESS } lvmlockd_monitor() { if silent_status ; then return $OCF_SUCCESS fi ocf_log info "${LOCKD} not running" return $OCF_NOT_RUNNING } lvmlockd_validate() { check_binary ${LOCKD} check_binary lvm check_binary dlm_tool check_binary pgrep check_binary lvmlockctl return $OCF_SUCCESS } # Make sure meta-data and usage always succeed case $__OCF_ACTION in meta-data) meta_data exit $OCF_SUCCESS ;; usage|help) usage exit $OCF_SUCCESS ;; esac # Anything other than meta-data and usage must pass validation lvmlockd_validate || exit $? # Translate each action into the appropriate function call case $__OCF_ACTION in start) lvmlockd_start ;; stop) lvmlockd_stop ;; monitor) lvmlockd_monitor ;; validate-all) lvmlockd_validate ;; *) usage exit $OCF_ERR_UNIMPLEMENTED ;; esac rc=$? ocf_log debug "${OCF_RESOURCE_INSTANCE} $__OCF_ACTION : $rc" exit $rc