Improve devstack docs for Xenserver

Minor fixes to scripts

Fixes bug 943508

Change-Id: Iaf12b9d67efa78623e8253599010f60192b4af64

README.md

@@ -12,6 +12,10 @@ Read more at http://devstack.org (built from the gh-pages branch)
 
 IMPORTANT: Be sure to carefully read stack.sh and any other scripts you execute before you run them, as they install software and may alter your networking configuration.  We strongly recommend that you run stack.sh in a clean and disposable vm when you are first getting started.
 
+# Devstack on Xenserver
+
+If you would like to use Xenserver as the hypervisor, please refer to the instructions in ./tools/xen/README.md.
+
 # Versions
 
 The devstack master branch generally points to trunk versions of OpenStack components.  For older, stable versions, look for branches named stable/[release].  For example, you can do the following to create a diablo OpenStack cloud:

tools/xen/README.md

@@ -4,12 +4,19 @@ The purpose of the code in this directory it to help developers bootstrap
 a XenServer 5.6 + Openstack development environment.  This file gives
 some pointers on how to get started.
 
+Xenserver is a Type 1 hypervisor, so it needs to be installed on bare metal.
+The Openstack services are configured to run within a "privileged" virtual
+machine on the Xenserver host (called OS domU). The VM uses the XAPI toolstack
+to communicate with the host.
+
 Step 1: Install Xenserver
 ------------------------
-Install XenServer 5.6 on a clean box. You can get XenServer by signing
+Install XenServer 5.6+ on a clean box. You can get XenServer by signing
 up for an account on citrix.com, and then visiting:
 https://www.citrix.com/English/ss/downloads/details.asp?downloadId=2311504&productId=683148
 
+For details on installation, see: http://wiki.openstack.org/XenServer/Install
+
 Here are some sample Xenserver network settings for when you are just
 getting started (I use settings like this with a lappy + cheap wifi router):
 
@@ -18,24 +25,33 @@ getting started (I use settings like this with a lappy + cheap wifi router):
 * XenServer Gateway: 192.168.1.1
 * XenServer DNS: 192.168.1.1
 
+Note:
+------
+It is advisable (and necessary if you are using Xenserver 6.0, due to space
+limitations), to create the above mentioned OS domU, on a separate dev machine.
+To do this, you will need to run Steps 2 on the dev machine (if required) as
+well as the Xenserver host. Steps 3 and 4 should be run on the dev machine.
+This process requires you to be root on the dev machine.
+
 Step 2: Prepare DOM0
 -------------------
-At this point, your server is missing some critical software that you will
+At this point, your host is missing some critical software that you will
 need to run devstack (like git).  Do this to install required software:
 
-    wget --no-check-certificate https://github.com/cloudbuilders/devstack/raw/xen/tools/xen/prepare_dom0.sh
+    wget --no-check-certificate https://raw.github.com/openstack-dev/devstack/master/tools/xen/prepare_dom0.sh
     chmod 755 prepare_dom0.sh
     ./prepare_dom0.sh
 
-This script will also clone devstack in /root/devstack
+This step will also clone devstack in $DEVSTACKSRCROOT/devstack.
+$DEVSTACKSRCROOT=/root by default.
 
 Step 3: Configure your localrc
 -----------------------------
 Devstack uses a localrc for user-specific configuration.  Note that
 the XENAPI_PASSWORD must be your dom0 root password.
 Of course, use real passwords if this machine is exposed.
 
-    cat > /root/devstack/localrc <<EOF
+    cat > $DEVSTACKSRCROOT/devstack/localrc <<EOF
     MYSQL_PASSWORD=my_super_secret
     SERVICE_TOKEN=my_super_secret
     ADMIN_PASSWORD=my_super_secret
@@ -52,16 +68,20 @@ Of course, use real passwords if this machine is exposed.
     MULTI_HOST=1
     # Give extra time for boot
     ACTIVE_TIMEOUT=45
+    # Interface on which you would like to access services
+    HOST_IP_IFACE=ethX
     EOF
 
 Step 4: Run ./build_xva.sh
 --------------------------
-This script prpares your nova xva image.  This script can be run on a separate machine
-and copied to dom0.  If you run this on a different machine, copy the resulting xva
-file to tools/xen/xvas/[GUEST_NAME].xva (by default tools/xen/xvas/ALLINONE.xva)
+This script prepares your nova xva image. If you run this on a different machine,
+copy the resulting xva file to tools/xen/xvas/[GUEST_NAME].xva
+(by default tools/xen/xvas/ALLINONE.xva) on the Xenserver host.
 
-It is likely that for XS6 you will need to build_xva.sh on a separate machine due
-to dom0 space constraints.
+cd $DEVSTACKSRCROOT/devstack/tools/xen
+./build_xva.sh
+
+You will also need to copy your localrc to the Xenserver host.
 
 Step 5: Run ./build_domU.sh
 --------------------------
@@ -72,6 +92,9 @@ But in a nutshell, it performs the following:
 * Creates and installs a OpenStack all-in-one domU in an HA-FlatDHCP configuration
 * A script to create a multi-domU (ie. head node separated from compute) configuration is coming soon!
 
+cd $DEVSTACKSRCROOT/devstack/tools/xen
+./build_domU.sh
+
 Step 6: Do cloudy stuff!
 --------------------------
 * Play with horizon

tools/xen/build_domU.sh

@@ -184,6 +184,10 @@ if [ -z $PUB_BR ]; then
 fi
 $TOP_DIR/scripts/install-os-vpx.sh -f $XVA -v $VM_BR -m $MGT_BR -p $PUB_BR -l $GUEST_NAME -w -k "flat_network_bridge=${VM_BR}"
 
+if [ $PUB_IP == "dhcp" ]; then
+    PUB_IP=$(xe vm-list --minimal name-label=$GUEST_NAME params=networks |  sed -ne 's,^.*3/ip: \([0-9.]*\).*$,\1,p')
+fi
+
 # If we have copied our ssh credentials, use ssh to monitor while the installation runs
 WAIT_TILL_LAUNCH=${WAIT_TILL_LAUNCH:-1}
 if [ "$WAIT_TILL_LAUNCH" = "1" ]  && [ -e ~/.ssh/id_rsa.pub  ] && [ "$COPYENV" = "1" ]; then

tools/xen/build_xva.sh

@@ -187,4 +187,5 @@ if [ ! -e $XVA ]; then
     UID=0 $SCRIPT_DIR/mkxva -o $XVA -t xva -x $OVA $STAGING_DIR $VDI_MB /tmp/
 fi
 
-echo "Built $XVA.  If your dom0 is on a different machine, copy this to [devstackdir]/tools/xen/$XVA"
+echo "Built $(basename $XVA).  If your dom0 is on a different machine, copy this to [devstackdir]/tools/xen/$(basename $XVA)"
+echo "Also copy your localrc to [devstackdir]"

tools/xen/prepare_dom0.sh

@@ -34,3 +34,8 @@ if ! which git; then
     make install
 fi
 
+# Clone devstack
+DEVSTACK=${DEVSTACKROOT:/root/devstack}
+if [ ! -d $DEVSTACK ]; then
+    git clone git://github.com/openstack-dev/devstack.git $DEVSTACK
+fi