Getting started with OpenStack on Fedora 17

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m (Setup the database: Added sub-sections for every specific service (Nova, Glance, Cinder))
m (Setup volume storage: Added sub-sections for Cinder (new) and Nova-volumes (now deprecated))
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=== Setup volume storage ===
=== Setup volume storage ===
The volume service has been extracted from Nova and incorporated into a new dedicated component named [ Cinder (dubbed OpenStacked Block Storage)]. From the [ Folsom release], only Cinder has become officially supported and Nova-volumes has subsequently been deprecated.
The openstack-nova-volume service requires an LVM Volume Group called nova-volumes to exist. We simply create this using a loopback sparse disk image.
==== Cinder volumes (from Folsom) ====
The Cinder service requires an LVM Volume Group, named cinder-volumes, to exist. We simply create this using a loop-back sparse disk image:
$> sudo truncate --size=20G /var/lib/cinder/cinder-volumes.img
$> sudo losetup --show -f /var/lib/cinder/cinder-volumes.img
$> CINDER_VOL_DEVICE=$(losetup -a | grep "/var/lib/cinder/cinder-volumes.img" | cut -d':' -f1)
$> sudo vgcreate cinder-volumes $CINDER_VOL_DEVICE
  $> sudo dd if=/dev/zero of=/var/lib/nova/nova-volumes.img bs=1M seek=20k count=0
==== Nova volumes (deprecated) ====
  $> sudo vgcreate nova-volumes $(sudo losetup --show -f /var/lib/nova/nova-volumes.img)
The Openstack nova-volume service requires an LVM Volume Group, named nova-volumes, to exist. We simply create this using a loop-back sparse disk image:
  $> sudo truncate --size=20G /var/lib/nova/nova-volumes.img
  $> sudo losetup --show -f /var/lib/nova/nova-volumes.img
$> NOVA_VOL_DEVICE=$(losetup -a | grep "/var/lib/nova/nova-volumes.img" | cut -d':' -f1)
$> sudo vgcreate nova-volumes $NOVA_VOL_DEVICE
=== Installing without hardware acceleration / within a virtual machine (VM) ===
=== Installing without hardware acceleration / within a virtual machine (VM) ===

Revision as of 17:31, 18 November 2012


Basic Setup

  • These steps will setup OpenStack Nova, Glance, and Keystone to be accessed by the OpenStack Dashboard web UI on a single host, as well as launching our first instance (virtual machine). Fedora 17 includes OpenStack Essex release.
  • Many of the examples here require 'sudo' to be properly configured, please see Configuring Sudo if you need help.
  • If you have already installed OpenStack with DevStack, you have to remove the installation tree from the file system and the MySQL users and databases:
$> if [ -d /opt/stack ]; then \rm -rf /opt/stack; fi
$> cat > ~/clean_os_db.sql << _EOF
drop database if exists nova;
drop database if exists glance;
drop database if exists cinder;
drop database if exists keystone;
grant usage on *.* to 'nova'@'%'; drop user 'nova'@'%';
grant usage on *.* to 'nova'@'localhost'; drop user 'nova'@'localhost';
grant usage on *.* to 'glance'@'%'; drop user 'glance'@'%';
grant usage on *.* to 'glance'@'localhost'; drop user 'glance'@'localhost';
grant usage on *.* to 'cinder'@'%'; drop user 'cinder'@'%';
grant usage on *.* to 'cinder'@'localhost'; drop user 'cinder'@'localhost';
grant usage on *.* to 'keystone'@'%'; drop user 'keystone'@'%';
grant usage on *.* to 'keystone'@'localhost'; drop user 'keystone'@'localhost';
flush privileges;
$> mysql -u root -p < ~/clean_os_db.sql
  • You may also want to see Denis' step-by-step guide, greatly inspired by this page, but resulting from hours of debugging on Fedora 17 in November 2012.

Fedora OpenStack preview repository

It is recommended to install and configure the latest stable OpenStack release. As of November 2012, the latest stable release is Folsom, aka 2012.2. For that purpose, enable the OpenStack Preview Repository before proceeding with the following sections:

$> sudo curl -o /etc/yum.repos.d/fedora-openstack-folsom.repo

Check the OpenStack version

To know the release version of OpenStack:

  • For a remote repository:
$> yum info openstack-nova-compute | grep -e Version -e Release
# Standard Fedora 17 repositories:
Version     : 2012.1.3
Release     : 1.fc17
# Fedora OpenStack preview repository:
Version     : 2012.2
Release     : 1.fc18
  • From the RPM database:
$> rpm -qv openstack-nova-compute
# Standard Fedora 17 repositories:
# Fedora OpenStack preview repository:
  • From OpenStack itself:
$> nova-manage version
# Standard Fedora 17 repositories:
# Fedora OpenStack preview repository:

Install packages

First let us pull in OpenStack and some optional dependencies:

# Nova (compute), Glance (images), Keystone (identity), Swift (object store), Horizon (dashboard)
$> sudo yum install openstack-utils openstack-nova openstack-glance openstack-keystone \
  openstack-swift openstack-dashboard openstack-swift-proxy openstack-swift-account \
  openstack-swift-container openstack-swift-object
# QPID (AMQP message bus), memcached, NBD (Network Block Device) module
$> sudo yum install qpid-cpp-server-daemon qpid-cpp-server memcached nbd
# Python bindings
$> sudo yum install python-django-openstack-auth python-django-horizon \
  python-keystone python-keystone-auth-token python-keystoneclient \
  python-nova-adminclient python-quantumclient
# Some documentation
$> sudo yum install openstack-keystone-doc openstack-swift-doc openstack-cinder-doc \
# New Folsom components: Quantum (network), Tempo, Cinder (replacement for Nova volumes)
$> sudo yum install openstack-quantum openstack-tempo openstack-cinder \
  openstack-quantum-linuxbridge openstack-quantum-openvswitch \
  python-cinder python-cinderclient
# Ruby bindings
$> sudo yum install rubygem-openstack rubygem-openstack-compute
# Image creation
$> sudo yum install appliance-tools appliance-tools-minimizer \
  febootstrap rubygem-boxgrinder-build

Setup the database

Nova database

Run the helper script to get MySQL configured for use with openstack-nova. If mysql-server is not already installed, this script will install it for you.

$> sudo openstack-db --service nova --init

Then, synchronize the Nova database:

$> nova-manage db sync

Glance database

Similarly, run the helper script to get MySQL configured for use with openstack-glance.

$> sudo openstack-db --service glance --init

Cinder database

Similarly, run the helper script to get MySQL configured for use with openstack-cinder.

$> sudo openstack-db --service cinder --init

Start support services

Nova requires the QPID messaging server to be running.

$> sudo systemctl start qpidd.service && sudo systemctl enable qpidd.service

Nova requires the libvirtd server to be running:

$> sudo systemctl start libvirtd.service && sudo systemctl enable libvirtd.service

Starting the Glance services

Next, you should enable the Glance API and registry services:

$> for svc in api registry; do sudo systemctl start openstack-glance-$svc.service; done
$> for svc in api registry; do sudo systemctl enable openstack-glance-$svc.service; done

Setup volume storage

The volume service has been extracted from Nova and incorporated into a new dedicated component named Cinder (dubbed OpenStacked Block Storage). From the Folsom release, only Cinder has become officially supported and Nova-volumes has subsequently been deprecated.

Cinder volumes (from Folsom)

The Cinder service requires an LVM Volume Group, named cinder-volumes, to exist. We simply create this using a loop-back sparse disk image:

$> sudo truncate --size=20G /var/lib/cinder/cinder-volumes.img
$> sudo losetup --show -f /var/lib/cinder/cinder-volumes.img
$> CINDER_VOL_DEVICE=$(losetup -a | grep "/var/lib/cinder/cinder-volumes.img" | cut -d':' -f1)
$> sudo vgcreate cinder-volumes $CINDER_VOL_DEVICE

Nova volumes (deprecated)

The Openstack nova-volume service requires an LVM Volume Group, named nova-volumes, to exist. We simply create this using a loop-back sparse disk image:

$> sudo truncate --size=20G /var/lib/nova/nova-volumes.img
$> sudo losetup --show -f /var/lib/nova/nova-volumes.img
$> NOVA_VOL_DEVICE=$(losetup -a | grep "/var/lib/nova/nova-volumes.img" | cut -d':' -f1)
$> sudo vgcreate nova-volumes $NOVA_VOL_DEVICE

Installing without hardware acceleration / within a virtual machine (VM)

$> sudo openstack-config --set /etc/nova/nova.conf DEFAULT libvirt_type qemu
$> setsebool -P virt_use_execmem on # This may take a while

Starting the Nova services

$> for svc in api objectstore compute network volume scheduler cert; do sudo systemctl start openstack-nova-$svc.service; done
$> for svc in api objectstore compute network volume scheduler cert; do sudo systemctl enable openstack-nova-$svc.service; done

Check that all the services started up correctly and look in the logs in /var/log/nova for errors. If there are none, then Nova is up and running!

Note the network service should only be started on a single node, when setting up multiple compute nodes

Initial Keystone setup

Keystone is the OpenStack identity service, providing a central place to set up OpenStack users, groups, and accounts that can be shared across all other services. This deprecates the old style user accounts manually set up with nova-manage.

Setting up Keystone is required for using the OpenStack dashboard.

  • Configure the Keystone database, similar to how we do it for nova
$> sudo openstack-db --service keystone --init
  • Set up a keystonerc file with a generated admin token and various passwords:
$> cat > keystonerc << _EOF
export ADMIN_TOKEN=$(openssl rand -hex 10)
export OS_USERNAME=admin
export OS_PASSWORD=verybadpass
export OS_TENANT_NAME=admin
export OS_AUTH_URL=
$> . ./keystonerc
  • Set the administrative token in the config file
$> sudo openstack-config --set /etc/keystone/keystone.conf DEFAULT admin_token $ADMIN_TOKEN
  • Start and enable Keystone service
$> sudo systemctl start openstack-keystone.service && sudo systemctl enable openstack-keystone.service
  • Create sample Tenants, Users and Roles
$> sudo ADMIN_PASSWORD=$OS_PASSWORD SERVICE_PASSWORD=servicepass openstack-keystone-sample-data
  • Test the Keystone CLI is working
$> keystone user-list
|                id                | enabled |       email        |  name  |
| 53c7ad6f1b154754bd59cf07ffe9b0c1 |   True  |  | admin  |
| 75194f7ca5354f92b42d80070df15dd3 |   True  |  |  demo  |
| 45861e2701d24c17a57da280d3a03c3b |   True  |  |  nova  |
| fc205aedf6c34b2998847b0ee3bf3bd1 |   True  | | glance |
  • The Fedora 17 Keystone CLI version makes use of some Python PrettyTable-related functions, which have been deprecated. Upstream has reported the bug (#996638). If you come across that bug (i.e., the output of any keystone xxx-list command returns 'printt' only), you can apply the patch suggested on their bug report:
$> pushd /usr/lib/python2.7/site-packages
$> wget
$> patch -p1 --dry-run < replace-printt.diff
$> # Uncomment the following line if everything seems fine:
$> # patch -p1 < replace-printt.diff
$> \rm -f replace-printt.diff
$> popd
Note that this bug affects the calculation of temporary variables within the /usr/share/openstack-keystone/ Shell script (itself called by the openstack-keystone-sample-data executable). In that case, not all the users will be created by that Shell script (for instance, nova and glance may be missing). So, you will have to re-start everything from Basic Setup section above, replacing systemctl start by systemctl restart where appropriate.

Configure nova to use keystone

  • Change nova configuration to use keystone:
$> sudo openstack-config --set /etc/nova/api-paste.ini filter:authtoken admin_tenant_name service
$> sudo openstack-config --set /etc/nova/api-paste.ini filter:authtoken admin_user nova
$> sudo openstack-config --set /etc/nova/api-paste.ini filter:authtoken admin_password servicepass
$> sudo openstack-config --set /etc/nova/nova.conf DEFAULT auth_strategy keystone
$> for svc in api compute; do sudo systemctl restart openstack-nova-$svc.service; done
  • Verify that nova can talk with keystone (requires OS_* exports from previous keystone section)
$> nova flavor-list
| ID |    Name   | Memory_MB | Swap | Local_GB | VCPUs | RXTX_Factor |
| 1  | m1.tiny   | 512       |      | 0        | 1     | 1.0         |
| 2  | m1.small  | 2048      |      | 10       | 1     | 1.0         |
| 3  | m1.medium | 4096      |      | 10       | 2     | 1.0         |
| 4  | m1.large  | 8192      |      | 10       | 4     | 1.0         |
| 5  | m1.xlarge | 16384     |      | 10       | 8     | 1.0         |

Configure glance to use keystone

  • Change glance configuration to use keystone:
$> sudo openstack-config --set /etc/glance/glance-api.conf paste_deploy flavor keystone
$> sudo openstack-config --set /etc/glance/glance-registry.conf paste_deploy flavor keystone
$> sudo openstack-config --set /etc/glance/glance-api-paste.ini filter:authtoken admin_tenant_name service
$> sudo openstack-config --set /etc/glance/glance-api-paste.ini filter:authtoken admin_user glance
$> sudo openstack-config --set /etc/glance/glance-api-paste.ini filter:authtoken admin_password servicepass
$> sudo openstack-config --set /etc/glance/glance-registry-paste.ini filter:authtoken admin_tenant_name service
$> sudo openstack-config --set /etc/glance/glance-registry-paste.ini filter:authtoken admin_user glance
$> sudo openstack-config --set /etc/glance/glance-registry-paste.ini filter:authtoken admin_password servicepass
$> for svc in api registry; do sudo systemctl restart openstack-glance-$svc.service; done
  • Verify that glance can talk with keystone (requires OS_* exports from the previous keystone section)
$> glance index

Nova Network Setup

To create the network do:

$> sudo nova-manage network create demonet 1 256 --bridge=demonetbr0

NB the network range here, should *not* be the one used on your existing physical network. It should be a range dedicated for the network that OpenStack will configure. So if clashes with your local network, pick another range

Register an Image

To run an instance, you are going to need an image. There are prebuilt Fedora 16 JEOS (Just Enough OS) images that can be downloaded. Note this will download a 200MB image (without a progress bar)

 $> glance add name=f16-jeos is_public=true disk_format=qcow2 container_format=bare \

another way:

 $> glance add name=f16-jeos is_public=true disk_format=qcow2 container_format=bare < f16-x86_64-openstack-sda.qcow2

Launch an Instance

As a last step before launching, make sure the nbd kernel module is loaded so that injecting SSH key files into the filesystem on the qcow2 image works:

$> sudo modprobe nbd

Create a keypair:

$> nova keypair-add mykey > oskey.priv
$> chmod 600 oskey.priv

Launch an instance:

$> nova boot myserver --flavor 2 --key_name mykey \
     --image $(glance index | grep f16-jeos | awk '{print $1}')

And then observe the instance running, observe the KVM VM running and SSH into the instance:

$> sudo virsh list
$> nova list
$> ssh -i oskey.priv root@
$> nova console-log myserver
$> nova delete myserver

Configure the OpenStack Dashboard

The OpenStack dashboard is the official web user interface for OpenStack. It should mostly work out of the box, as long as keystone has been configured properly.

  • Install the dashboard
$> sudo yum install openstack-dashboard
  • Make sure httpd is running
$> sudo systemctl restart httpd.service && sudo systemctl enable httpd.service
  • If selinux is enabled, you will have to allow httpd to access other network services (the dashboard talks to the http API of the other OpenStack services)
$> sudo setsebool -P httpd_can_network_connect=on

The dashboard should then be accessed with a web browser at http://localhost/dashboard . Account and password should be what you configured for the keystone setup.

Configure swift with keystone

These are the minimal steps required to setup a swift installation with keystone authentication, this wouldn't be considered a working swift system but at the very least will provide you with a working swift API to test clients against, most notably it doesn't include replication, multiple zones and load balancing.

Installing swift

$> sudo yum install openstack-swift openstack-swift-proxy openstack-swift-account openstack-swift-container openstack-swift-object memcached

Ensure the keystone env variables are still setup from the previous steps

We need to create 5 configuration files

$> cat > /tmp/swift.conf <<- EOF
swift_hash_path_suffix = randomestringchangeme
$> sudo mv /tmp/swift.conf /etc/swift/swift.conf
$> cat > /tmp/proxy-server.conf <<- EOF
bind_port = 8080
workers = 8
user = swift
pipeline = catch_errors healthcheck cache authtoken keystone proxy-server
use = egg:swift#proxy
account_autocreate = true
paste.filter_factory = keystone.middleware.swift_auth:filter_factory
operator_roles = admin, swiftoperator
paste.filter_factory = keystone.middleware.auth_token:filter_factory
auth_port = 35357
auth_host =
auth_protocol = http
admin_token = ADMINTOKEN
#  ??? Are these needed?
service_port = 5000
service_host =
service_protocol = http
auth_token = ADMINTOKEN
use = egg:swift#healthcheck
use = egg:swift#memcache
memcache_servers =
use = egg:swift#catch_errors
$> sudo mv /tmp/proxy-server.conf /etc/swift/proxy-server.conf
$> cat > /tmp/account-server.conf <<- EOF
bind_ip =
workers = 2
pipeline = account-server
use = egg:swift#account
$> sudo mv /tmp/account-server.conf /etc/swift/account-server.conf
$> cat > /tmp/container-server.conf <<- EOF
bind_ip =
workers = 2
pipeline = container-server
use = egg:swift#container
$> sudo mv /tmp/container-server.conf /etc/swift/container-server.conf
$> cat > /tmp/object-server.conf <<- EOF
bind_ip =
workers = 2
pipeline = object-server
use = egg:swift#object
$> sudo mv /tmp/object-server.conf /etc/swift/object-server.conf

So that swift can authenticate tokens we need to set the keystone Admin token in the swift proxy file

$> sudo openstack-config --set /etc/swift/proxy-server.conf filter:authtoken admin_token $ADMIN_TOKEN
$> sudo openstack-config --set /etc/swift/proxy-server.conf filter:authtoken auth_token $ADMIN_TOKEN

Create the storage device for swift, these instructions use a loopback device but a physical device or logical volume can be used

$> truncate --size=20G /tmp/swiftstorage
$> DEVICE=$(sudo losetup --show -f /tmp/swiftstorage)
$> sudo mkfs.ext4 -I 1024 $DEVICE
$> sudo mkdir -p /srv/node/partitions
$> sudo mount $DEVICE /srv/node/partitions -t ext4 -o noatime,nodiratime,nobarrier,user_xattr

Change the working dir so that the following commands will create the *.builder files on right place.

$> cd /etc/swift

Create the ring, with 1024 partitions (only suitable for a small test environment) and 1 zone

$> sudo swift-ring-builder account.builder create 10 1 1
$> sudo swift-ring-builder container.builder create 10 1 1
$> sudo swift-ring-builder object.builder create 10 1 1

Create a device for each of the account, container and object services

$> sudo swift-ring-builder account.builder add z1- 100
$> sudo swift-ring-builder container.builder add z1- 100
$> sudo swift-ring-builder object.builder add z1- 100

Rebalance the ring (allocates partitions to devices)

$> sudo swift-ring-builder account.builder rebalance
$> sudo swift-ring-builder container.builder rebalance
$> sudo swift-ring-builder object.builder rebalance

make sure swift owns appropriate files

$> sudo chown -R swift:swift /etc/swift /srv/node/partitions

Added the swift service and endpoint to keystone

$> SERVICEID=$(keystone  service-create --name=swift --type=object-store --description="Swift Service" | grep "id " | cut -d "|" -f 3)
$> echo $SERVICEID # just making sure we got a SERVICEID
$> keystone endpoint-create --service_id $SERVICEID --publicurl "\$(tenant_id)s" --adminurl "\$(tenant_id)s" --internalurl "\$(tenant_id)s"

Start the services

$> sudo service memcached start
$> for srv in account container object proxy  ; do sudo service openstack-swift-$srv start ; done

Test the swift client and upload files

$> swift list
$> swift upload container /path/to/file

Additional Functionality

Using Eucalyptus tools

Install the Eucalyptus tools

sudo yum install euca2ools

Set up a rc file for EC2 access (this expects a prior keystone configuration)

$> . ./keystonerc
$> USER_ID=$(keystone user-list | awk '/admin / {print $2}')
$> ACCESS_KEY=$(keystone ec2-credentials-list --user $USER_ID | awk '/admin / {print $4}')
$> SECRET_KEY=$(keystone ec2-credentials-list --user $USER_ID | awk '/admin / {print $6}')
$> cat > novarc <<EOF
export EC2_URL=http://localhost:8773/services/Cloud
$> chmod 600 novarc
$> . ./novarc 

You should now be able to launch an image:

$> euca-run-instances f16-jeos -k mykey
$> euca-describe-instances
$> euca-get-console-output i-00000001
$> euca-terminate-instances i-00000001


Rather than the prebuilt Fedora 16 JEOS image referenced above, there are other image options.

  1. Building a Fedora 16 JEOS image using Oz
  2. Downloading ttylinux based minimal images used by OpenStack developers for testing

Building Fedora 16 JEOS Images With Oz

You can very easily build an image using Oz. First, make sure it's installed:

$> sudo yum install oz

Create a template definition file called f16-jeos.tdl containing:

 <description>My Fedora 16 x86_64 template</description>
  <install type='url'>
   <command name='setup-rc-local'>
sed -i 's/rhgb quiet/console=ttyS0/' /boot/grub/grub.conf
cat >> /etc/rc.local &lt;&lt; EOF
if [ ! -d /root/.ssh ]; then
  mkdir -p /root/.ssh
  chmod 700 /root/.ssh
# Fetch public key using HTTP
while [ ! -f /root/.ssh/authorized_keys ]; do
    curl -f > /tmp/aws-key 2>/dev/null
    if [ \$? -eq 0 ]; then
        cat /tmp/aws-key >> /root/.ssh/authorized_keys
        chmod 0600 /root/.ssh/authorized_keys
        restorecon /root/.ssh/authorized_keys
        rm -f /tmp/aws-key
        echo "Successfully retrieved AWS public key from instance metadata"
        FAILED=\$((\$FAILED + 1))
        if [ \$FAILED -ge \$ATTEMPTS ]; then
            echo "Failed to retrieve AWS public key after \$FAILED attempts, quitting"
        echo "Could not retrieve AWS public key (attempt #\$FAILED/\$ATTEMPTS), retrying in 5 seconds..."
        sleep 5

Then simply do:

$> sudo oz-install -d4 -u f16-jeos.tdl

Once built, you simply have to register the image with Nova:

$> glance add name=f16-jeos is_public=true container_format=bare disk_format=raw < /var/lib/libvirt/images/fedora16_x86_64.dsk
$> glance index

The last command should return a list of the images registered with the Glance image registry.

Downloading Existing Images

If you don't need a functioning Fedora 16 and want the smallest possible images, just download this set of images commonly used by OpenStack developers for testing and register them with Nova:

$> mkdir images
$> cd images
$> curl -L | tar xvfzo -
$> glance add name=aki-tty disk_format=aki container_format=aki is_public=true < aki-tty/image
$> glance add name=ami-tty disk_format=ami container_format=ami is_public=true < ami-tty/image
$> glance add name=ari-tty disk_format=ari container_format=ari is_public=true < ari-tty/image

Then to start the image:

$> euca-run-instances ami-tty --kernel aki-tty --ramdisk ari-tty -k mykey


If you use the Chrome browser, kill it before embarking on this section, as it has been known to cause the lvcreate command to fail with 'incorrect semaphore state' errors.

Note when setting up volumes in production, make sure you don't put your volume nodes on the same network as your guests when using the default volume driver, as all the iscsi targets are discoverable and accessible without any security.

Start the SCSI target daemon

$> sudo systemctl start tgtd.service
$> sudo systemctl enable tgtd.service

Create a new 1GB volume

$> VOLUME=$(euca-create-volume -s 1 -z nova | awk '{print $2}')

View the status of the new volume, and wait for it to become 'available'

$> watch "euca-describe-volumes | grep $VOLUME | grep available"

Re-run the previously terminated instance if necessary:

$> INSTANCE=$(euca-run-instances f16-jeos -k mykey | grep INSTANCE | awk '{print $2}')


$> INSTANCE=$(euca-run-instances ami-tty --kernel aki-tty --ramdisk ari-tty -k mykey | grep INSTANCE | awk '{print $2}')

Make the storage available to the instance (note -d is the device on the compute node)

$> euca-attach-volume -i $INSTANCE -d /dev/vdc $VOLUME

ssh to the instance and verify that the vdc device is listed in /proc/partitions

$> cat /proc/partitions

Now make the device available if /dev/vdc is not already present

$> mknod /dev/vdc b 252 32

Create and mount a file system directly on the device

$> sudo mkfs.ext3 /dev/vdc
$> sudo mkdir /mnt/nova-volume
$> sudo mount /dev/vdc /mnt/nova-volume

Display some file system details

$> df -h /dev/vdc

Create a temporary file:

$> sudo su -c 'echo foo > /mnt/nova-volume/bar'

Terminate and re-run the instance, then re-attach the volume and re-mount within the instance as above. Your temporary file will have persisted:

$> cat /mnt/nova-volume/bar

Unmount the volume again:

$> sudo umount /mnt/nova-volume

Exit from the ssh session, then detach and delete the volume:

$> euca-detach-volume $VOLUME
$> euca-delete-volume $VOLUME

Floating IPs

You may carve out a block of public IPs and assign them to instances.

First thing you need to do is make sure that nova is configured with the correct public network interface. The default is eth0, but you can change it by e.g.

$> sudo openstack-config --set /etc/nova/nova.conf DEFAULT public_interface em1
$> sudo systemctl restart openstack-nova-network.service

Then you can do e.g.

$> sudo nova-manage floating create
$> euca-allocate-address
$> euca-associate-address -i i-00000012
$> ssh -i nova_key.priv root@
$> euca-disassociate-address
$> euca-release-address

VNC access

To setup VNC access to guests through the dashboard.

First you need to install openstack-nova-novncproxy.

$> sudo yum install --enablerepo=updates-testing openstack-nova-novncproxy

nova-novncproxy reads some parameters in /etc/nova/nova.conf file.

You need to configure your cloud controller to enable VNC.

novncproxy_host =
novncproxy_port = 6080

and in the nova compute nodes you need something like this


You should also make sure that openstack-nova-consoleauth and openstack-nova-novncproxy have been started on the controller node:

$ controller> sudo ln -s /usr/lib/systemd/system/openstack-nova-consoleauth.service /etc/systemd/system/
$ controller> sudo ln -s /usr/lib/systemd/system/openstack-nova-novncproxy.service /etc/systemd/system/
$ controller> sudo service openstack-nova-consoleauth restart
$ controller> sudo service openstack-nova-novncproxy restart

After restarting nova services on both nodes the newly created machines will run the qemu-kvm with a parameter -vnc compute_fqdn:display_number. Then after starting the novncproxy and connecting to the dashboard it will discover the host and point to the novncproxy with the appropriate values and connect to the VM.

Note ensure than the iptables entries for VNC ports (5900+DISPLAYNUMBER) are allowed.

Migrate and Resize

This is implemented currently by transferring the images between compute nodes over ssh. Therefore currently you need to make these adjustments on each compute node to allow that.

  • Allow logins for the nova user
 # usermod -s /bin/bash nova
 # su - nova
 $ mkdir .ssh && cd .ssh
  • Disable host identity checking by adding this to ssh config
 $ cat > config <<EOF
 Host * 
   StrictHostKeyChecking no 
  • Generate and distribute ssh key
 $ ssh-keygen -f id_rsa -b 1024 -P 
 $ scp /var/lib/nova/.ssh/ root@otherHost:/var/lib/nova/.ssh/authorized_keys
 # chown nova:nova /var/lib/nova/.ssh/authorized_keys
 # semanage permissive -a sshd_t

To improve the SELinux config in future, the nova_var_lib_t context on /var/lib/nova will, need to be configured to allow search access by sshd_t. Also the ssh_home_t context will need to be associated with /var/lib/nova/.ssh

Live Migration of VM instances

First note the official OpenStack docs on the feature and a doc patch distinguishing libvirt live migration.

  • Seting NFS server
    • Make an nfs share with no_root_squash (nova uses root-wrap to chown the instance's disk to qemu:qemu)
    • Make nova user and qemu user:
    • chown -R nova:nova /the/nfs/share
  • Mount nfs share on each host at /var/lib/nova/instances
  • Configure libvirt
    • See the libvirt wiki as to how to create certificates.
    • Edit /etc/libvirt/libvirt.conf
listen_tcp = 1
tcp_port = "16509"
auth_tcp = "none"
    • Edit /etc/sysconfig/libvirtd
  • Restart libvirtd & OpenStack compute services


Adding a Compute Node

Okay, everything so far has been done on a single node. The next step is to add another node for running VMs.

Let's assume the machine you've set up above is called 'controller' and the new machine is called 'node'.

First, open the rabbitmq, MySQL, Nova API and iSCSI ports on controller:

$ controller> sudo lokkit -p 3306:tcp
$ controller> sudo lokkit -p 5672:tcp
$ controller> sudo lokkit -p 9292:tcp
$ controller> sudo lokkit -p 3260:tcp
$ controller> sudo service libvirtd reload

Then make sure that ntp is enabled on both machines:

$> sudo yum install -y ntp
$> sudo service ntpd start
$> sudo chkconfig ntpd on

Install libvirt and nova on node:

$ node> sudo yum install --enablerepo=updates-testing openstack-nova
$ node> sudo service libvirtd start
$ node> sudo chkconfig libvirtd on
$ node> sudo setenforce 0

Configure nova so that node can find the services on controller:

$ node> sudo openstack-config --set /etc/nova/nova.conf DEFAULT qpid_hostname controller
$ node> sudo openstack-config --set /etc/nova/nova.conf DEFAULT sql_connection mysql://nova:nova@controller/nova
$ node> sudo openstack-config --set /etc/nova/nova.conf DEFAULT glance_api_servers controller:9292
$ node> sudo openstack-config --set /etc/nova/nova.conf DEFAULT iscsi_ip_prefix

(The {{{iscsi_ip_prefix}}} value is the IP address of the controller node)

Enable the compute service:

$ node> for svc in compute network; do sudo service openstack-nova-$svc start; done

Finally, you need to make sure the network is configured with a physical bridge interface:

$ controller> sudo nova-manage network create demonet --bridge=demonetbr0 --bridge_interface=em1

Now everything should be running as before, except the VMs are launched either on controller or node.

Manual Setup of MySQL

As of openstack-nova-2011.3-9.el6 and openstack-nova-2011.3-8.fc16, openstack-nova is now set up to use MySQL by default. If you're updating an older installation or prefer to set up MySQL manually instead of using the openstack-db script, this section shows how to do it.

First install and enable MySQL:

$> sudo yum install -y mysql-server
$> sudo service mysqld start
$> sudo chkconfig mysqld on

Set a password for the root account and delete the anonymous accounts:

$> mysql -u root
mysql> update mysql.user set password = password('iamroot') where user = 'root';
mysql> delete from mysql.user where user = '';

Create a database and user account specifically for nova:

mysql> create database nova;
mysql> create user 'nova'@'localhost' identified by 'nova';
mysql> create user 'nova'@'%' identified by 'nova';
mysql> grant all on nova.* to 'nova'@'%';

(If anyone can explain why nova@localhost is required even though the anonymous accounts have been deleted, I'd be very grateful :-)

Then configure nova to use the DB and install the schema:

$> sudo openstack-config --set /etc/nova/nova.conf DEFAULT sql_connection mysql://nova:nova@localhost/nova
$> sudo nova-manage db sync

As a final sanity check:

$> mysql -u nova -p nova
Enter password:
mysql> select * from migrate_version;


Smoke Tests

Nova comes with a selection of fairly basic smoke tests which you can run against your installation. It can be useful to use these to sanity check your configuration.

First off, you need the nova-adminclient python library which isn't yet packaged:

$> sudo yum install python-pip
$> sudo pip-python install nova-adminclient

Then you need a user and project both named admin:

$> sudo nova-manage user admin admin
$> sudo nova-manage project create admin admin
$> sudo nova-manage project zipfile admin admin
$> unzip
$> . ./novarc

Make sure you have the tty images imported as described above. You also need a block of floating IPs created, also as described above.

Then, run the tests from a fedpkg checkout:

$> fedpkg clone openstack-nova
$> cd openstack-nova
$> fedpkg switch-branch f16
$> fedpkg prep
$> cd nova-2011.3/smoketests
$> python ./

All the tests should pass.

If you run into import errors such as:

ImportError: No module named nose


ImportError (No module named paramiko)

simply install the missing dependency as follows:

$> sudo yum install -y python-nose.noarch
$> sudo yum install -y python-paramiko.noarch


While testing OpenStack, you might want to delete everything related to OpenStack and start testing with a clean slate again.

Here's how. First, make sure to terminate all running instances:

$> euca-terminate-instances ...

Double check that you have no lingering VMs, perhaps saved to disk:

$> virsh list --all && virsh undefine
$> rm -f /var/lib/libvirt/qemu/save/instance-00000*

Then stop all the services:

$> for iii in /usr/lib/systemd/system/openstack-*.service; do sudo systemctl stop $(basename $iii); done

Delete all the packages:

$> sudo yum erase python-glance python-nova* python-keystone* openstack-swift*

Delete the nova and keystone tables from the MySQL DB:

$> mysql -u root -p -e 'drop database nova;'
$> mysql -u root -p -e 'drop database keystone;'

Delete the nova-volumes VG:

$> sudo vgchange -an nova-volumes
$> sudo losetup -d /dev/loop0
$> sudo rm -f /var/lib/nova/nova-volumes.img

Take down the bridge and kill dnsmasq:

$> sudo ip link set demonetbr0 down
$> sudo brctl delbr demonetbr0
$> sudo kill -9 $(cat /var/lib/nova/networks/

Remove all directories left behind from the packages:

$> sudo rm -rf /etc/{glance,nova,swift,keystone,openstack-dashboard} /var/lib/{glance,nova,swift,keystone} /var/log/{glance,nova,swift,keystone} /var/run/{glance,nova,swift,keystone}

Finally, restart iptables to clear out all rules added by Nova. You also need to reload libvirt's iptables rules:

$> sudo service iptables restart
$> sudo service libvirtd restart