From 346e49131b40d3dc492ce2ad193a3e316839631e Mon Sep 17 00:00:00 2001
From: Anthony Young <sleepsonthefloor@gmail.com>
Date: Sat, 5 Nov 2011 00:22:47 -0500
Subject: [PATCH] add script that demonstrates separation of head abd compute
 roles when using xen

---
 tools/xen/build_domU.sh       | 23 ++++++++++++++---------
 tools/xen/build_domU_multi.sh | 35 +++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 9 deletions(-)
 create mode 100755 tools/xen/build_domU_multi.sh

diff --git a/tools/xen/build_domU.sh b/tools/xen/build_domU.sh
index 65049af..9804255 100755
--- a/tools/xen/build_domU.sh
+++ b/tools/xen/build_domU.sh
@@ -226,16 +226,21 @@ mkdir -p /boot/guest
 SR_UUID=`xe sr-list --minimal name-label="Local storage"`
 xe sr-param-set uuid=$SR_UUID other-config:i18n-key=local-storage
 
-# Uninstall previous runs
-xe vm-list --minimal name-label="$LABEL" | xargs ./scripts/uninstall-os-vpx.sh
 
-# Destroy any instances that were launched
-for uuid in `xe vm-list | grep -1 instance | grep uuid | sed "s/.*\: //g"`; do
-    echo "Shutting down nova instance $uuid"
-    xe vm-unpause uuid=$uuid || true
-    xe vm-shutdown uuid=$uuid
-    xe vm-destroy uuid=$uuid
-done
+# Shutdown previous runs
+DO_SHUTDOWN=${DO_SHUTDOWN:-1}
+if [ "$DO_SHUTDOWN" = "1" ]; then
+    # Uninstall previous runs
+    xe vm-list --minimal name-label="$LABEL" | xargs ./scripts/uninstall-os-vpx.sh
+
+    # Destroy any instances that were launched
+    for uuid in `xe vm-list | grep -1 instance | grep uuid | sed "s/.*\: //g"`; do
+        echo "Shutting down nova instance $uuid"
+        xe vm-unpause uuid=$uuid || true
+        xe vm-shutdown uuid=$uuid
+        xe vm-destroy uuid=$uuid
+    done
+fi
 
 # Path to head xva.  By default keep overwriting the same one to save space
 USE_SEPARATE_XVAS=${USE_SEPARATE_XVAS:-0}
diff --git a/tools/xen/build_domU_multi.sh b/tools/xen/build_domU_multi.sh
new file mode 100755
index 0000000..130bec5
--- /dev/null
+++ b/tools/xen/build_domU_multi.sh
@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+
+# Echo commands
+set -o xtrace
+
+# Head node host, which runs glance, api, keystone
+HEAD_PUB_IP=${HEAD_PUB_IP:-192.168.1.57}
+HEAD_MGT_IP=${HEAD_MGT_IP:-172.16.100.57}
+
+COMPUTE_PUB_IP=${COMPUTE_PUB_IP:-192.168.1.58}
+COMPUTE_MGT_IP=${COMPUTE_MGT_IP:-172.16.100.58}
+
+# Networking params
+FLOATING_RANGE=${FLOATING_RANGE:-192.168.1.196/30}
+
+# Variables common amongst all hosts in the cluster
+COMMON_VARS="$STACKSH_PARAMS MYSQL_HOST=$HEAD_MGT_IP RABBIT_HOST=$HEAD_MGT_IP GLANCE_HOSTPORT=$HEAD_MGT_IP:9292 FLOATING_RANGE=$FLOATING_RANGE"
+
+# Helper to launch containers
+function build_domU {
+    GUEST_NAME=$1 PUB_IP=$2 MGT_IP=$3 DO_SHUTDOWN=$4 TERMINATE=$TERMINATE STACKSH_PARAMS="$COMMON_VARS $5" ./build_domU.sh
+}
+
+# Launch the head node - headnode uses a non-ip domain name,
+# because rabbit won't launch with an ip addr hostname :(
+build_domU HEADNODE $HEAD_PUB_IP $HEAD_MGT_IP 1 "ENABLED_SERVICES=g-api,g-reg,key,n-api,n-sch,n-vnc,horizon,mysql,rabbit"
+
+# Wait till the head node is up
+while ! curl -L http://$HEAD_PUB_IP | grep -q username; do
+    echo "Waiting for head node ($HEAD_PUB_IP) to start..."
+    sleep 5
+done
+
+# Build the HA compute host
+build_domU $COMPUTE_PUB_IP $COMPUTE_PUB_IP $COMPUTE_MGT_IP 0 "ENABLED_SERVICES=n-cpu,n-net,n-api"