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diff --git a/heartbeat/dnsupdate.in b/heartbeat/dnsupdate.in
old mode 100644
new mode 100755
index 4fcd2a8ba..35b7c99bb
--- a/heartbeat/dnsupdate.in
+++ b/heartbeat/dnsupdate.in
@@ -1,297 +1,381 @@
#!@BASH_SHELL@
#
#
# Support: users@clusterlabs.org
# License: GNU General Public License v2
#
# Copyright (c) 2014 SUSE Linux Products GmbH, Lars Marowsky-Brée
# All Rights Reserved.
#
#######################################################################
: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs
# Parameter defaults
OCF_RESKEY_hostname_default=""
+OCF_RESKEY_type_default="A"
OCF_RESKEY_ip_default=""
+OCF_RESKEY_cname_default=""
OCF_RESKEY_ttl_default="300"
OCF_RESKEY_keyfile_default=""
OCF_RESKEY_server_default=""
OCF_RESKEY_serverport_default="53"
OCF_RESKEY_nsupdate_opts_default=""
OCF_RESKEY_unregister_on_stop_default="false"
: ${OCF_RESKEY_hostname=${OCF_RESKEY_hostname_default}}
+: ${OCF_RESKEY_cname=${OCF_RESKEY_cname_default}}
+: ${OCF_RESKEY_type=${OCF_RESKEY_type_default}}
: ${OCF_RESKEY_ip=${OCF_RESKEY_ip_default}}
: ${OCF_RESKEY_ttl=${OCF_RESKEY_ttl_default}}
: ${OCF_RESKEY_keyfile=${OCF_RESKEY_keyfile_default}}
: ${OCF_RESKEY_server=${OCF_RESKEY_server_default}}
: ${OCF_RESKEY_serverport=${OCF_RESKEY_serverport_default}}
: ${OCF_RESKEY_nsupdate_opts=${OCF_RESKEY_nsupdate_opts_default}}
: ${OCF_RESKEY_unregister_on_stop=${OCF_RESKEY_unregister_on_stop_default}}
#######################################################################
# TODO:
-# - Should setting CNAMEs be supported?
# - Should multiple A records be supported?
usage() {
cat <<-!
usage: $0 {start|stop|status|monitor|meta-data|validate-all}
!
}
meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="dnsupdate" version="1.0">
<version>1.0</version>
<longdesc lang="en">
This resource agent manages IP take-over via dynamic DNS updates.
</longdesc>
<shortdesc lang="en">IP take-over via dynamic DNS update</shortdesc>
<parameters>
<parameter name="hostname" unique="1" required="1">
<longdesc lang="en">
-The hostname whose IP address will need to be updated.
+Either the hostname whose IP address will need to be updated (in case of type=A)
+or alias whose hostname will need to be updated (in case of type=CNAME).
</longdesc>
<shortdesc lang="en">Hostname to update</shortdesc>
<content type="string" default="${OCF_RESKEY_hostname_default}" />
</parameter>
-<parameter name="ip" unique="0" required="1">
+<parameter name="type" unique="0" required="0">
+<longdesc lang="en">
+The type of DNS record that need to be updated (A or CNAME).
+</longdesc>
+<shortdesc lang="en">Type of DNS record</shortdesc>
+<content type="string" default="${OCF_RESKEY_type_default}" />
+</parameter>
+
+<parameter name="ip" unique="0" required="0">
<longdesc lang="en">
IP address to set.
</longdesc>
<shortdesc lang="en">IP address to set</shortdesc>
<content type="string" default="${OCF_RESKEY_ip_default}" />
</parameter>
+<parameter name="cname" unique="0" required="0">
+<longdesc lang="en">
+The CNAME whose hostname address will need to be updated.
+</longdesc>
+<shortdesc lang="en">CNAME to update</shortdesc>
+<content type="string" default="${OCF_RESKEY_cname_default}" />
+</parameter>
+
<parameter name="ttl" unique="0" required="0">
<longdesc lang="en">
Time to live, in seconds, for the DNS record. This
affects how soon DNS updates propagate. It should be
a reasonable compromise between update speed and DNS
server load.
If using booth, the ticket timeout is a good start.
</longdesc>
<shortdesc lang="en">TTL for the DNS record</shortdesc>
<content type="integer" default="${OCF_RESKEY_ttl_default}" />
</parameter>
<parameter name="keyfile" unique="0" required="0">
<longdesc lang="en">
The file containing the shared secret needed to update
the DNS record. Please see the nsupdate man page for
the exact syntax.
</longdesc>
<shortdesc lang="en">nsupdate key file</shortdesc>
<content type="string" default="${OCF_RESKEY_keyfile_default}" />
</parameter>
<parameter name="server" unique="0" required="0">
<longdesc lang="en">
Which DNS server to send these updates for. When no
server is provided, this defaults to the master server
for the correct zone.
</longdesc>
<shortdesc lang="en">DNS server to contact</shortdesc>
<content type="string" default="${OCF_RESKEY_server_default}" />
</parameter>
<parameter name="serverport" unique="0" required="0">
<longdesc lang="en">
Port number on the DNS server.
Note: due to a limitation in the nsupdate command, this option will only
take effect if you also specify the DNS server!
</longdesc>
<shortdesc lang="en">Port number on the DNS server</shortdesc>
<content type="integer" default="${OCF_RESKEY_serverport_default}" />
</parameter>
<parameter name="nsupdate_opts" unique="0" required="0">
<longdesc lang="en">
Additional options to be passed to nsupdate.
</longdesc>
<shortdesc lang="en">Additional nsupdate options</shortdesc>
<content type="string" default="${OCF_RESKEY_nsupdate_opts_default}" />
</parameter>
<parameter name="unregister_on_stop" unique="0" required="0">
<longdesc lang="en">
Whether or not to actively remove records on stop. This is not needed
for normal operation, since the site taking over the IP address will
delete all previous records.
</longdesc>
<shortdesc lang="en">Remove A record on stop</shortdesc>
<content type="boolean" default="${OCF_RESKEY_unregister_on_stop_default}" />
</parameter>
</parameters>
<actions>
<action name="start" timeout="30s" />
<action name="stop" timeout="30s" />
<action name="status" depth="0" timeout="30s" interval="10s" />
<action name="monitor" depth="0" timeout="30s" interval="10s" />
<action name="meta-data" timeout="5s" />
<action name="validate-all" timeout="5s" />
</actions>
</resource-agent>
END
}
dnsupdate_status() {
- # The resource is considered active if the current IP
- # address is returned as the only response.
- local record=$(dig ${dig_opts} ${hostname}. A +short 2>/dev/null)
- if [ "$record" = "$ip" ]; then
- return $OCF_SUCCESS
- fi
- return $OCF_NOT_RUNNING
+ case $type in
+ A)
+ # The resource is considered active if the current IP
+ # address is returned as the only response.
+ local record=$(dig ${dig_opts} ${hostname}. A +short 2>/dev/null)
+ if [ "$record" = "$ip" ]; then
+ return $OCF_SUCCESS
+ fi
+ return $OCF_NOT_RUNNING
+ ;;
+ CNAME)
+ local record=$(dig ${dig_opts} ${cname}. CNAME +short 2>/dev/null)
+ if [ "$record" = "${hostname}." ]; then
+ return $OCF_SUCCESS
+ fi
+ return $OCF_NOT_RUNNING
+ ;;
+ esac
+
}
dnsupdate_monitor() {
if ocf_is_probe ; then
#
return $OCF_NOT_RUNNING
fi
dnsupdate_status
}
dnsupdate_start() {
- if dnsupdate_status ; then
- ocf_log info "$hostname already resolves to $ip"
- return $OCF_SUCCESS
- fi
+ case $type in
+ A)
+ if dnsupdate_status ; then
+ ocf_log info "$hostname already resolves to $ip"
+ return $OCF_SUCCESS
+ fi
+
+ ocf_log info "Updating DNS records for $hostname"
+
+ (
+ if [ -n "$dns_server" ]; then
+ echo "server ${dns_server} ${dns_serverport}"
+ fi
+ echo "update delete $hostname A"
+ echo "update add $hostname ${OCF_RESKEY_ttl} A $ip"
+ echo "send"
+ ) | nsupdate ${nsupdate_opts}
+ ;;
- ocf_log info "Updating DNS records for $hostname"
+ CNAME)
+ if dnsupdate_status ; then
+ ocf_log info "$cname already is an alias to $hostname"
+ return $OCF_SUCCESS
+ fi
+
+ ocf_log info "Updating DNS records for $cname"
+
+ (
+ if [ -n "$dns_server" ]; then
+ echo "server ${dns_server} ${dns_serverport}"
+ fi
+ echo "update delete $cname CNAME"
+ echo "update add $cname ${OCF_RESKEY_ttl} CNAME $hostname"
+ echo "send"
+ ) | nsupdate ${nsupdate_opts}
+ ;;
+
+ esac
- (
- if [ -n "$dns_server" ]; then
- echo "server ${dns_server} ${dns_serverport}"
- fi
- echo "update delete $hostname A"
- echo "update add $hostname ${OCF_RESKEY_ttl} A $ip"
- echo "send"
- ) | nsupdate ${nsupdate_opts}
dnsupdate_monitor
return $?
}
dnsupdate_stop() {
- if ocf_is_true "${OCF_RESKEY_unregister_on_stop}" && dnsupdate_status ; then
- ocf_log info "Unregistering $hostname with $ip from DNS server"
- (
- if [ -n "$dns_server" ]; then
- echo "server ${dns_server} ${dns_serverport}"
+ case $type in
+ A)
+ if ocf_is_true "${OCF_RESKEY_unregister_on_stop}" && dnsupdate_status ; then
+ ocf_log info "Unregistering $hostname with $ip from DNS server"
+ (
+ if [ -n "$dns_server" ]; then
+ echo "server ${dns_server} ${dns_serverport}"
+ fi
+ echo "update delete $hostname A $ip"
+ echo "send"
+ ) | nsupdate ${nsupdate_opts}
+
+ dnsupdate_monitor
+ if [ $? -ne $OCF_NOT_RUNNING ]; then
+ ocf_log warn "Unregistering failed!"
+ fi
fi
- echo "update delete $hostname A $ip"
- echo "send"
- ) | nsupdate ${nsupdate_opts}
-
- dnsupdate_monitor
- if [ $? -ne $OCF_NOT_RUNNING ]; then
- ocf_log warn "Unregistering failed!"
- # There's no point in invoking a stop failure
- # here. If another site takes over the record,
- # it'll delete all previous entries anyway.
+ return $OCF_SUCCESS
+ ;;
+ CNAME)
+ if ocf_is_true "${OCF_RESKEY_unregister_on_stop}" && dnsupdate_status ; then
+ ocf_log info "Unregistering $cname with $hostname from DNS server"
+ (
+ if [ -n "$dns_server" ]; then
+ echo "server ${dns_server} ${dns_serverport}"
+ fi
+ echo "update delete $cname CNAME"
+ echo "send"
+ ) | nsupdate ${nsupdate_opts}
+
+ dnsupdate_monitor
+ if [ $? -ne $OCF_NOT_RUNNING ]; then
+ ocf_log warn "Unregistering failed!"
+ fi
fi
- fi
- return $OCF_SUCCESS
+ return $OCF_SUCCESS
+ ;;
+ esac
}
dnsupdate_validate() {
hostname=${OCF_RESKEY_hostname}
ip=${OCF_RESKEY_ip}
+ #added support for CNAME
+ type=${OCF_RESKEY_type}
+ cname=${OCF_RESKEY_cname}
+ #
dig_opts=""
dns_server=${OCF_RESKEY_server}
: ${OCF_RESKEY_serverport:="53"}
dns_serverport=${OCF_RESKEY_serverport}
: ${OCF_RESKEY_ttl:="300"}
nsupdate_opts=${OCF_RESKEY_nsupdate_opts}
if [ -z "$nsupdate_opts" -a -n "$OCF_RESKEY_opts" ]; then
nsupdate_opts=${OCF_RESKEY_opts}
ocf_log warn "opts was never an advertised parameter, please use nsupdate_opts"
fi
if [ -z "$hostname" ]; then
ocf_log err "No hostname specified."
exit $OCF_ERR_CONFIGURED
fi
- if [ -z "$ip" ]; then
+ if [ -z "$ip" ] && [ "$type" = "A" ]; then
ocf_log err "No IP specified."
exit $OCF_ERR_CONFIGURED
fi
+ #added support for CNAME
+ if [ -z "$type" ]; then
+ ocf_log err "No TYPE specified."
+ exit $OCF_ERR_CONFIGURED
+ fi
+ #
if ! ocf_is_decimal $OCF_RESKEY_ttl ; then
ocf_log err "ttl $OCF_RESKEY_ttl is not valid"
exit $OCF_ERR_CONFIGURED
fi
if ! ocf_is_decimal $dns_serverport ; then
ocf_log err "serverport $dns_serverport is not valid"
exit $OCF_ERR_CONFIGURED
fi
dig_opts+=" -p ${dns_serverport}"
if [ -n "$dns_server" ]; then
dig_opts+=" @${dns_server}"
fi
if [ -n "$OCF_RESKEY_keyfile" ]; then
if [ ! -f ${OCF_RESKEY_keyfile} ]; then
ocf_log err "keyfile $OCF_RESKEY_keyfile does not exist"
exit $OCF_ERR_CONFIGURED
fi
nsupdate_opts+=" -k $OCF_RESKEY_keyfile"
fi
}
if [ $# -ne 1 ]; then
usage
exit $OCF_ERR_ARGS
fi
case $1 in
meta-data) meta_data
exit $OCF_SUCCESS
;;
usage) usage
exit $OCF_SUCCESS
;;
esac
check_binary dig
check_binary nsupdate
dnsupdate_validate
case $1 in
start) dnsupdate_start
;;
stop) dnsupdate_stop
;;
monitor) dnsupdate_monitor
;;
status) dnsupdate_status
;;
validate-all) # We've already run this
exit $OCF_SUCCESS
;;
*) usage
exit $OCF_ERR_UNIMPLEMENTED
;;
esac
exit $?
-

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