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Diffstat (limited to '')
| -rw-r--r-- | heartbeat/conntrackd.in | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/heartbeat/conntrackd.in b/heartbeat/conntrackd.in new file mode 100644 index 0000000..1c2ee95 --- /dev/null +++ b/heartbeat/conntrackd.in @@ -0,0 +1,335 @@ +#!@BASH_SHELL@ +# +# +# An OCF RA for conntrackd +# http://conntrack-tools.netfilter.org/ +# +# Copyright (c) 2011 Dominik Klein +# +# 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 + +####################################################################### + +OCF_RESKEY_binary_default=conntrackd +OCF_RESKEY_config_default=/etc/conntrackd/conntrackd.conf + +# For users of versions prior to 1.2: +# Map renamed parameter "conntrackd" to "binary" if in use +: ${OCF_RESKEY_binary=${OCF_RESKEY_conntrackd-${OCF_RESKEY_binary_default}}} +: ${OCF_RESKEY_config=${OCF_RESKEY_config_default}} + +meta_data() { + cat <<END +<?xml version="1.0"?> +<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd"> +<resource-agent name="conntrackd" version="1.2"> +<version>1.0</version> + +<longdesc lang="en"> +Promotable OCF Resource Agent for conntrackd +</longdesc> + +<shortdesc lang="en">This resource agent manages conntrackd</shortdesc> + +<parameters> +<parameter name="binary"> +<longdesc lang="en">Name of the conntrackd executable. +If conntrackd is installed and available in the default PATH, it is sufficient to configure the name of the binary +For example "my-conntrackd-binary-version-0.9.14" +If conntrackd is installed somewhere else, you may also give a full path +For example "/packages/conntrackd-0.9.14/sbin/conntrackd" +</longdesc> +<shortdesc lang="en">Name of the conntrackd executable</shortdesc> +<content type="string" default="$OCF_RESKEY_binary_default"/> +</parameter> + +<parameter name="config"> +<longdesc lang="en">Full path to the conntrackd.conf file. +For example "/packages/conntrackd-0.9.14/etc/conntrackd/conntrackd.conf"</longdesc> +<shortdesc lang="en">Path to conntrackd.conf</shortdesc> +<content type="string" default="$OCF_RESKEY_config_default"/> +</parameter> +</parameters> + +<actions> +<action name="start" timeout="30s" /> +<action name="promote" timeout="30s" /> +<action name="demote" timeout="30s" /> +<action name="notify" timeout="30s" /> +<action name="stop" timeout="30s" /> +<action name="monitor" timeout="20s" interval="20s" role="Unpromoted" /> +<action name="monitor" timeout="20s" interval="10s" role="Promoted" /> +<action name="meta-data" timeout="5s" /> +<action name="validate-all" timeout="30s" /> +</actions> +</resource-agent> +END +} + +meta_expect_eq() +{ + local what=$1 whatvar=OCF_RESKEY_CRM_meta_${1//-/_} expect=$2 + local val=${!whatvar} + if [[ -n $val ]]; then + # [, not [[, or it won't work ;) + [ $val = $expect ] && return + fi + ocf_exit_reason "meta parameter misconfigured, expected $what $op $expect, but found ${val:-unset}." + exit $OCF_ERR_CONFIGURED +} + +conntrackd_is_master() { + # You can't query conntrackd whether it is master or slave. It can be both at the same time. + # This RA creates a statefile during promote and enforces master-max=1 and clone-node-max=1 + ha_pseudo_resource $statefile monitor +} + +conntrackd_set_master_score() { + ${HA_SBIN_DIR}/crm_master -Q -l reboot -v $1 +} + +conntrackd_monitor() { + rc=$OCF_NOT_RUNNING + # It does not write a PID file, so check the socket exists after + # extracting its path from the configuration file + local conntrack_socket=$(awk '/^[ \t]*UNIX[ \t]*{/,/^[ \t]*}/ { if ($1 == "Path") { print $2 } }' $OCF_RESKEY_config) + [ -S "$conntrack_socket" ] && rc=$OCF_SUCCESS + if [ "$rc" -eq "$OCF_SUCCESS" ]; then + # conntrackd is running + # now see if it acceppts queries + if ! $OCF_RESKEY_binary -C $OCF_RESKEY_config -s > /dev/null 2>&1; then + rc=$OCF_ERR_GENERIC + ocf_exit_reason "conntrackd is running but not responding to queries" + fi + if conntrackd_is_master; then + rc=$OCF_RUNNING_MASTER + # Restore master setting on probes + if [ $OCF_RESKEY_CRM_meta_interval -eq 0 ]; then + conntrackd_set_master_score $master_score + fi + else + # Restore master setting on probes + if [ $OCF_RESKEY_CRM_meta_interval -eq 0 ]; then + conntrackd_set_master_score $slave_score + fi + fi + fi + return $rc +} + +conntrackd_start() { + rc=$OCF_ERR_GENERIC + + # Keep trying to start the resource; + # wait for the CRM to time us out if this fails + while :; do + conntrackd_monitor + status=$? + case "$status" in + $OCF_SUCCESS) + conntrackd_set_master_score $slave_score + # -n = request resync from the others + if ! $OCF_RESKEY_binary -C $OCF_RESKEY_config -n; then + ocf_exit_reason "$OCF_RESKEY_binary -C $OCF_RESKEY_config -n failed during start." + rc=$OCF_ERR_GENERIC + else + rc=$OCF_SUCCESS + fi + break + ;; + $OCF_NOT_RUNNING) + ocf_log info "Starting conntrackd" + $OCF_RESKEY_binary -C $OCF_RESKEY_config -d + ;; + $OCF_RUNNING_MASTER) + ocf_log warn "conntrackd already in master mode, demoting." + ha_pseudo_resource $statefile stop + ;; + $OCF_ERR_GENERIC) + ocf_exit_reason "conntrackd start failed" + rc=$OCF_ERR_GENERIC + break + ;; + esac + done + return $rc +} + +conntrackd_stop() { + rc=$OCF_ERR_GENERIC + + # Keep trying to bring down the resource; + # wait for the CRM to time us out if this fails + while :; do + conntrackd_monitor + status=$? + case "$status" in + $OCF_SUCCESS|$OCF_ERR_GENERIC) + ocf_log info "Stopping conntrackd" + $OCF_RESKEY_binary -C $OCF_RESKEY_config -k + ;; + $OCF_NOT_RUNNING) + rc=$OCF_SUCCESS + break + ;; + $OCF_RUNNING_MASTER) + ocf_log warn "conntrackd still master" + ;; + esac + done + return $rc + +} + +conntrackd_validate_all() { + check_binary "$OCF_RESKEY_binary" + if ! [ -e "$OCF_RESKEY_config" ]; then + ocf_exit_reason "Config FILE $OCF_RESKEY_config does not exist" + return $OCF_ERR_INSTALLED + fi + meta_expect_eq master-node-max 1 + meta_expect_eq master-max 1 + meta_expect_eq clone-node-max 1 + + return $OCF_SUCCESS +} + +conntrackd_promote() { + rc=$OCF_SUCCESS + if ! conntrackd_is_master; then + # -c = Commit the external cache to the kernel + # -f = Flush internal and external cache + # -R = resync with the kernel table + # -B = send a bulk update on the line + for parm in c f R B; do + if ! $OCF_RESKEY_binary -C $OCF_RESKEY_config -$parm; then + ocf_exit_reason "$OCF_RESKEY_binary -C $OCF_RESKEY_config -$parm failed during promote." + rc=$OCF_ERR_GENERIC + break + fi + done + ha_pseudo_resource $statefile start + conntrackd_set_master_score $master_score + fi + return $rc +} + +conntrackd_demote() { + rc=$OCF_SUCCESS + if conntrackd_is_master; then + # -t = shorten kernel timers to remove zombies + # -n = request a resync from the others + for parm in t n; do + if ! $OCF_RESKEY_binary -C $OCF_RESKEY_config -$parm; then + ocf_exit_reason "$OCF_RESKEY_binary -C $OCF_RESKEY_config -$parm failed during demote." + rc=$OCF_ERR_GENERIC + break + fi + done + ha_pseudo_resource $statefile stop + conntrackd_set_master_score $slave_score + fi + return $rc +} + +conntrackd_notify() { + hostname=$(hostname) + # OCF_RESKEY_CRM_meta_notify_master_uname is a whitespace separated list of master hostnames + for master in $OCF_RESKEY_CRM_meta_notify_master_uname; do + # if we are the master and an instance was just started on another node: + # send a bulk update to allow failback + if [ "$hostname" = "$master" -a "$OCF_RESKEY_CRM_meta_notify_type" = "post" -a "$OCF_RESKEY_CRM_meta_notify_operation" = "start" -a "$OCF_RESKEY_CRM_meta_notify_start_uname" != "$hostname" ]; then + ocf_log info "Sending bulk update in post start to peers to allow failback" + $OCF_RESKEY_binary -C $OCF_RESKEY_config -B + fi + done + for tobepromoted in $OCF_RESKEY_CRM_meta_notify_promote_uname; do + # if there is a promote action to be executed on another node: + # send a bulk update to allow failback + if [ "$hostname" != "$tobepromoted" -a "$OCF_RESKEY_CRM_meta_notify_type" = "pre" -a "$OCF_RESKEY_CRM_meta_notify_operation" = "promote" ]; then + ocf_log info "Sending bulk update in pre promote to peers to allow failback" + $OCF_RESKEY_binary -C $OCF_RESKEY_config -B + fi + done +} + +conntrackd_usage() { + cat <<EOF +usage: $0 {start|stop|promote|demote|monitor|validate-all|meta-data} +Expects to have a fully populated OCF RA-compliant environment set. +EOF +} + +statefile=conntrackd.${OCF_RESOURCE_INSTANCE//:[0-9]*}.master + +master_score=1000 +slave_score=100 + +if [ $# -ne 1 ]; then + conntrackd_usage + exit $OCF_ERR_ARGS +fi + +case $__OCF_ACTION in +meta-data) + meta_data + exit $OCF_SUCCESS + ;; +usage) + conntrackd_usage + exit $OCF_SUCCESS +esac + +# Everything except usage and meta-data must pass the validate test +conntrackd_validate_all || exit + +case $__OCF_ACTION in +start) + conntrackd_start + ;; +stop) + conntrackd_stop + ;; +promote) + conntrackd_promote + ;; +demote) + conntrackd_demote + ;; +status|monitor) + conntrackd_monitor + ;; +notify) + conntrackd_notify + ;; +validate-all) + ;; +*) + conntrackd_usage + exit $OCF_ERR_UNIMPLEMENTED +esac +# exit code is the exit code (return code) of the last command (shell function) |