From 1707159764a26f2feeadffcbb77bf06d1bd4e24c Mon Sep 17 00:00:00 2001
From: Guido Trotter <ultrotter@google.com>
Date: Tue, 8 Nov 2011 12:13:07 +0000
Subject: [PATCH] Add ganeti-node-role ocf example file
This allows offlining nodes that don't respond if they are part of a
linux-HA cluster.
Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>
---
.gitignore | 1 +
Makefile.am | 1 +
devel/upload | 4 +
doc/examples/ganeti-node-role.ocf.in | 155 +++++++++++++++++++++++++++
4 files changed, 161 insertions(+)
create mode 100644 doc/examples/ganeti-node-role.ocf.in
diff --git a/.gitignore b/.gitignore
index ebd14918c..d25660f3b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -67,6 +67,7 @@
/doc/examples/ganeti.initd
/doc/examples/ganeti-kvm-poweroff.initd
/doc/examples/ganeti-master-role.ocf
+/doc/examples/ganeti-node-role.ocf
/doc/examples/gnt-config-backup
/doc/examples/hooks/ipsec
diff --git a/Makefile.am b/Makefile.am
index c447dcb37..5ea9925ba 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -209,6 +209,7 @@ BUILT_EXAMPLES = \
doc/examples/ganeti.cron \
doc/examples/ganeti.initd \
doc/examples/ganeti-master-role.ocf \
+ doc/examples/ganeti-node-role.ocf \
doc/examples/gnt-config-backup \
doc/examples/hooks/ipsec
diff --git a/devel/upload b/devel/upload
index 0b2da1248..efe00217e 100755
--- a/devel/upload
+++ b/devel/upload
@@ -103,6 +103,10 @@ install -D --mode=0755 doc/examples/ganeti.initd \
install -D --mode=0755 doc/examples/ganeti-master-role.ocf \
"$TXD/$LIBDIR/ocf/resource.d/ganeti/ganeti-master-role"
+[ -f doc/examples/ganeti-node-role.ocf ] && \
+install -D --mode=0755 doc/examples/ganeti-node-role.ocf \
+ "$TXD/$LIBDIR/ocf/resource.d/ganeti/ganeti-node-role"
+
[ -f doc/examples/ganeti.default-debug -a -z "$NO_DEBUG" ] && \
install -D --mode=0644 doc/examples/ganeti.default-debug \
"$TXD/$SYSCONFDIR/default/ganeti"
diff --git a/doc/examples/ganeti-node-role.ocf.in b/doc/examples/ganeti-node-role.ocf.in
new file mode 100644
index 000000000..3eed1eeb8
--- /dev/null
+++ b/doc/examples/ganeti-node-role.ocf.in
@@ -0,0 +1,155 @@
+#!/bin/bash
+# ganeti node role OCF resource
+# See http://linux-ha.org/wiki/OCF_Resource_Agents
+
+set -e -u
+
+@SHELL_ENV_INIT@
+
+PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
+
+SCRIPTNAME="@LIBDIR@/ocf/resource.d/ganeti/ganeti-node-role"
+
+# If this file exists don't act on notifications, thus allowing them to happen
+# during the service configuration.
+NORUNFILE="$DATA_DIR/ha_node_role_config"
+
+# Where to grep for tags
+TAGSFILE="$DATA_DIR/ssconf_cluster_tags"
+
+# If this tag is set we won't try to powercycle nodes
+POWERCYCLETAG="ocf:node-offline:use-powercycle"
+
+# If this tag is set will use IPMI to power off an offline node
+POWEROFFTAG="ocf:node-offline:use-poweroff"
+
+# We'll need the hostname in a few places, so we'll get it once, now.
+MYHOSTNAME=$(hostname --fqdn)
+
+is_master() {
+ local -r master=$(gnt-cluster getmaster)
+ [[ "$MYHOSTNAME" == "$master" ]]
+}
+
+start_action() {
+ # If we're alive we consider ourselves a node, without starting anything.
+ # TODO: improve on this
+ exit 0
+}
+
+stop_action() {
+ # We can't "really" stop the service locally.
+ # TODO: investigate whether a "fake" stop will work.
+ exit 1
+}
+
+recover_action() {
+ # Nothing to recover, as long as we're alive.
+ exit 0
+}
+
+monitor_action() {
+ # If we're alive we consider ourselves a working node.
+ # TODO: improve on this
+ exit 0
+}
+
+offline_node() {
+ local -r node=$1
+ grep -Fx $POWERCYCLETAG $TAGSFILE && gnt-node powercycle $node
+ grep -Fx $POWEROFFTAG $TAGSFILE && gnt-node power off $node
+ # TODO: do better than just --auto-promote
+ # (or make sure auto-promote gets better in Ganeti)
+ gnt-node modify -O yes --auto-promote $node
+}
+
+drain_node() {
+ node=$1
+ # TODO: do better than just --auto-promote
+ # (or make sure auto-promote gets better in Ganeti)
+ gnt-node modify -D yes --auto-promote $node || return 1
+}
+
+notify_action() {
+ is_master || exit 0
+ [[ -f $NORUNFILE ]] && exit 0
+ # TODO: also implement the "start" operation for readding a node
+ [[ $OCF_RESKEY_CRM_meta_notify_operation == "stop" ]] || exit 0
+ [[ $OCF_RESKEY_CRM_meta_notify_type == "post" ]] || exit 0
+ local -r target=$OCF_RESKEY_CRM_meta_notify_stop_uname
+ local -r node=$(gnt-node list --no-headers -o name $target)
+ # TODO: use drain_node when we can
+ offline_node $node
+ exit 0
+}
+
+return_meta() {
+cat <<END
+<?xml version="1.0"?>
+<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
+<resource-agent name="ganeti-node-role" version="0.1">
+<version>0.1</version>
+<longdesc lang="en">
+OCF script to manage the ganeti node role in a cluster.
+
+Can be used to online and offline nodes. Should be cloned on all nodes of the
+cluster, with notification enabled.
+
+</longdesc>
+<shortdesc lang="en">Manages the ganeti cluster nodes</shortdesc>
+
+<parameters/>
+<actions>
+<action name="start" timeout="10s" />
+<action name="stop" timeout="10s" />
+<action name="monitor" depth="0" timeout="10s" interval="30s" />
+<action name="meta-data" timeout="5s" />
+<action name="recover" timeout="20s" />
+<action name="reload" timeout="5s" />
+<action name="notify" timeout="1000s" />
+</actions>
+</resource-agent>
+END
+exit 0
+}
+
+case "$1" in
+ # Mandatory OCF commands
+ start)
+ start_action
+ ;;
+ stop)
+ stop_action
+ ;;
+ monitor)
+ monitor_action
+ ;;
+ meta-data)
+ return_meta
+ ;;
+ # Optional OCF commands
+ recover)
+ recover_action
+ ;;
+ reload)
+ # The ganeti node role has no "configuration" that is reloadable on
+ # the pacemaker side. We declare the operation anyway to make sure
+ # pacemaker doesn't decide to stop and start the service needlessly.
+ exit 0
+ ;;
+ notify)
+ # Notification of a change to the ganeti node role
+ notify_action
+ exit 0
+ ;;
+ promote|demote|migrate_to|migrate_from|validate-all)
+ # Not implemented (nor declared by meta-data)
+ exit 3 # OCF_ERR_UNIMPLEMENTED
+ ;;
+ *)
+ log_success_msg "Usage: $SCRIPTNAME {start|stop|monitor|meta-data|recover|reload}"
+ exit 1
+ ;;
+esac
+
+exit 0
--
GitLab