commit 501bfa9359923b5c9b1fd3f349d93c497940d0cd
Author: Kristoffer Grönlund <krig@koru.se>
Date:   Thu Feb 2 09:06:00 2017 +0100

    Medium: NodeUtilization: Add NodeUtilization agent
    
    The Node Utilization agent detects system parameters like available CPU, host
    memory and hypervisor memory availability, and adds them into the CIB for each
    node using crm_attribute. Run the agent as a clone resource to have it populate
    these parameters on each node.
    
    Note: Setting hv_memory only works with Xen at the moment, using the xl or xm
    command line tools.

Index: pacemaker/extra/resources/Makefile.am
===================================================================
--- pacemaker.orig/extra/resources/Makefile.am
+++ pacemaker/extra/resources/Makefile.am
@@ -37,7 +37,8 @@ ocf_SCRIPTS	     =  ClusterMon 	\
 			Stateful	\
 			SysInfo		\
 			SystemHealth \
-			remote
+			remote		\
+			NodeUtilization
 
 isolationtech_SCRIPTS	= docker-wrapper
 
Index: pacemaker/extra/resources/NodeUtilization
===================================================================
--- /dev/null
+++ pacemaker/extra/resources/NodeUtilization
@@ -0,0 +1,226 @@
+#!/bin/sh
+#
+#
+#	NodeUtilization OCF Resource Agent
+#
+# Copyright (c) 2011 SUSE LINUX, John Shi
+# Copyright (c) 2016 SUSE LINUX, Kristoffer Gronlund
+#                    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
+
+#######################################################################
+
+NodeUtilization_meta_data() {
+	cat <<END
+<?xml version="1.0"?>
+<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
+<resource-agent name="NodeUtilization">
+<version>1.0</version>
+
+<longdesc lang="en">
+The Node Utilization agent detects system parameters like available CPU, host
+memory and hypervisor memory availability, and adds them into the CIB for each
+node using crm_attribute. Run the agent as a clone resource to have it populate
+these parameters on each node.
+Note: Setting hv_memory only works with Xen at the moment, using the xl or xm
+command line tools.
+</longdesc>
+<shortdesc lang="en">Node Utilization</shortdesc>
+
+<parameters>
+<parameter name="dynamic" unique="0" required="0">
+<longdesc lang="en">
+If set, parameters will be updated if there are differences between the HA
+parameters and the system values when running the monitor action.
+If not set, the parameters will be set once when the resource instance starts.
+</longdesc>
+<shortdesc lang="en">Dynamically update parameters in monitor</shortdesc>
+<content type="boolean" default="true" />
+</parameter>
+
+<parameter name="utilization_cpu" unique="0" required="0">
+<longdesc lang="en">Enable setting node CPU utilization limit.</longdesc>
+<shortdesc lang="en">Set node CPU utilization limit.</shortdesc>
+<content type="boolean" default="true" />
+</parameter>
+
+<parameter name="utilization_cpu_reservation" unique="0" required="0">
+<longdesc lang="en">Subtract this value when setting the CPU utilization parameter.</longdesc>
+<shortdesc lang="en">CPU reservation.</shortdesc>
+<content type="integer" default="1" />
+</parameter>
+
+<parameter name="utilization_host_memory" unique="0" required="0">
+<longdesc lang="en">Enable setting available host memory.</longdesc>
+<shortdesc lang="en">Set available host memory.</shortdesc>
+<content type="boolean" default="true" />
+</parameter>
+
+<parameter name="utilization_host_memory_reservation" unique="0" required="0">
+<longdesc lang="en">Subtract this value when setting host memory utilization, in MB.</longdesc>
+<shortdesc lang="en">Host memory reservation, in MB.</shortdesc>
+<content type="integer" default="512" />
+</parameter>
+
+<parameter name="utilization_hv_memory" unique="0" required="0">
+<longdesc lang="en">Enable setting available hypervisor memory.</longdesc>
+<shortdesc lang="en">Set available hypervisor memory.</shortdesc>
+<content type="boolean" default="true" />
+</parameter>
+
+<parameter name="utilization_hv_memory_reservation" unique="0" required="0">
+<longdesc lang="en">Subtract this value when setting hypervisor memory utilization, in MB.</longdesc>
+<shortdesc lang="en">Hypervisor memory reservation, in MB.</shortdesc>
+<content type="integer" default="512" />
+</parameter>
+</parameters>
+
+<actions>
+<action name="start"   timeout="90" />
+<action name="stop"    timeout="100" />
+<action name="monitor" timeout="20s" interval="60s"/>
+<action name="meta-data"  timeout="5" />
+<action name="validate-all"  timeout="30" />
+</actions>
+</resource-agent>
+END
+}
+
+Host_Total_Memory() {
+    local xentool
+
+    xentool=$(which xl 2> /dev/null || which xm 2> /dev/null)
+
+    if [ -x $xentool ]; then
+        $xentool info | awk '/total_memory/{printf("%d\n",$3);exit(0)}'
+    else
+        ocf_log warn "Can only set hv_memory for Xen hypervisor"
+        echo "0"
+    fi
+}
+
+
+set_utilization() {
+    host_name="$(ocf_local_nodename)"
+
+    if ocf_is_true "$OCF_RESKEY_utilization_cpu"; then
+        sys_cpu=$(( $(grep -c processor /proc/cpuinfo) - $OCF_RESKEY_utilization_cpu_reservation ))
+        uti_cpu=$(crm_attribute -Q -t nodes -U "$host_name" -z -n cpu 2>/dev/null)
+
+        if [ "$sys_cpu" != "$uti_cpu" ]; then
+            if ! crm_attribute -t nodes -U "$host_name" -z -n cpu -v $sys_cpu; then
+                ocf_log err "Failed to set the cpu utilization attribute for $host_name using crm_attribute."
+                return 1
+            fi
+        fi
+    fi
+
+    if ocf_is_true "$OCF_RESKEY_utilization_host_memory"; then
+        sys_mem=$(( $(awk '/MemTotal/{printf("%d\n",$2/1024);exit(0)}' /proc/meminfo) - $OCF_RESKEY_utilization_host_memory_reservation ))
+        uti_mem=$(crm_attribute -Q -t nodes -U "$host_name" -z -n host_memory 2>/dev/null)
+
+        if [ "$sys_mem" != "$uti_mem" ]; then
+            if ! crm_attribute -t nodes -U "$host_name" -z -n host_memory -v $sys_mem; then
+                ocf_log err "Failed to set the host_memory utilization attribute for $host_name using crm_attribute."
+                return 1
+            fi
+        fi
+    fi
+
+    if ocf_is_true "$OCF_RESKEY_utilization_hv_memory"; then
+        hv_mem=$(( $(Host_Total_Memory) - OCF_RESKEY_utilization_hv_memory_reservation ))
+        uti_mem=$(crm_attribute -Q -t nodes -U "$host_name" -z -n hv_memory 2>/dev/null)
+
+        [ $hv_mem -lt 0 ] && hv_mem=0
+
+        if [ "$hv_mem" != "$uti_mem" ]; then
+            if ! crm_attribute -t nodes -U "$host_name" -z -n hv_memory -v $hv_mem; then
+                ocf_log err "Failed to set the hv_memory utilization attribute for $host_name using crm_attribute."
+                return 1
+            fi
+        fi
+    fi
+}
+
+NodeUtilization_usage() {
+    cat <<END
+usage: $0 {start|stop|monitor|validate-all|meta-data}
+
+Expects to have a fully populated OCF RA-compliant environment set.
+END
+}
+
+NodeUtilization_start() {
+    ha_pseudo_resource $statefile start
+    if ! ocf_is_true "$OCF_RESKEY_dynamic"; then
+        if ! set_utilization; then
+            exit $OCF_ERR_GENERIC
+        fi
+    fi
+    exit $OCF_SUCCESS
+}
+
+NodeUtilization_stop() {
+    ha_pseudo_resource $statefile stop
+    exit $OCF_SUCCESS
+}
+
+NodeUtilization_monitor() {
+    local rc
+    ha_pseudo_resource $statefile monitor
+    rc=$?
+
+    case $rc in
+        $OCF_SUCCESS)
+            if ocf_is_true "$OCF_RESKEY_dynamic"; then
+                if ! set_utilization; then
+                    exit $OCF_ERR_GENERIC
+                fi
+            fi
+            ;;
+        *) exit $rc;;
+    esac
+}
+
+NodeUtilization_validate() {
+    exit $OCF_SUCCESS
+}
+
+statefile=$OCF_RESOURCE_TYPE.$(echo $OCF_RESOURCE_INSTANCE | sed -e 's/^.*://')
+
+: ${OCF_RESKEY_pidfile:="$HA_VARRUN/NodeUtilization-${OCF_RESOURCE_INSTANCE}"}
+: ${OCF_RESKEY_dynamic:="true"}
+: ${OCF_RESKEY_utilization_cpu:="true"}
+: ${OCF_RESKEY_utilization_cpu_reservation="1"}
+: ${OCF_RESKEY_utilization_hv_memory:="true"}
+: ${OCF_RESKEY_utilization_hv_memory_reservation="512"}
+: ${OCF_RESKEY_utilization_host_memory:="true"}
+: ${OCF_RESKEY_utilization_host_memory_reservation="512"}
+
+OCF_REQUIRED_PARAMS=""
+OCF_REQUIRED_BINARIES=""
+ocf_rarun $*
