How to Perform an Upgrade from Grizzly to Havana - Ubuntu

The upgrade process will interrupt management of your environment, including the dashboard. If you properly prepare for this upgrade, tenant instances will continue to operate normally.

Always review the release notes before performing an upgrade to learn about newly available features that you may want to enable and deprecated features that you should disable.

Save the configuration files on all nodes, as shown here:

# for i in keystone glance nova cinder openstack-dashboard
> do mkdir $i-grizzly
> done
# for i in keystone glance nova cinder openstack-dashboard
> do cp -r /etc/$i/* $i-grizzly/
> done

	Note
	You can modify this example script on each node to handle different services.

Back up all databases on the controller:

# mysqldump -u root -p --opt --add-drop-database --all-databases > grizzly-db-backup.sql

On all nodes, remove the repository for Grizzly packages and add the repository for Havana packages:

# apt-add-repository -r cloud-archive:grizzly
# apt-add-repository cloud-archive:havana

	Warning
	Make sure any automatic updates are disabled.

Update the glance configuration on the controller node for compatibility with Havana.

If not currently present and configured as follows, add or modify the following keys in /etc/glance/glance-api.conf and /etc/glance/glance-registry.conf.

[keystone_authtoken]
auth_uri = http://controller:5000
auth_host = controller
admin_tenant_name = service
admin_user = glance
admin_password = GLANCE_PASS

[paste_deploy]
flavor = keystone

If currently present, remove the following key from the [filter:authtoken] section in /etc/glance/glance-api-paste.ini and /etc/glance/glance-registry-paste.ini.

[filter:authtoken]
flavor = keystone

Update the nova configuration on all nodes for compatibility with Havana.

Add the new [database] section and associated key to /etc/nova/nova.conf.

[database]
connection = mysql://nova:NOVA_DBPASS@controller/nova

Remove defunct configuration from the [DEFAULT] section in /etc/nova/nova.conf.

[DEFAULT]
sql_connection = mysql://nova:NOVA_DBPASS@controller/nova

If not already present and configured as follows, add or modify the following keys in /etc/nova/nova.conf.

[keystone_authtoken]
auth_uri = http://controller:5000/v2.0
auth_host = controller
auth_port = 35357
auth_protocol = http
admin_tenant_name = service
admin_user = nova
admin_password = NOVA_PASS

On all compute nodes, increase the DHCP lease time (measured in seconds) in /etc/nova/nova.conf to enable currently active instances to continue leasing their IP addresses during the upgrade process.

	Warning
	Setting this value too high may cause more dynamic environments to run out of available IP addresses. Use an appropriate value for your environment.

[DEFAULT]
dhcp_lease_time = 86400

You must restart dnsmasq and the networking component of Compute to enable the new DHCP lease time.

# pkill -9 dnsmasq
# service nova-network restart

Update the Cinder configuration on the controller and storage nodes for compatibility with Havana.

Add the new [database] section and associated key to /etc/cinder/cinder.conf.

[database]
connection = mysql://cinder:CINDER_DBPASS@controller/cinder

Remove defunct configuration from the [DEFAULT] section in /etc/cinder/cinder.conf.

[DEFAULT]
sql_connection = mysql://cinder:CINDER_DBPASS@controller/cinder

If not currently present and configured as follows, add or modify the following key in /etc/cinder/cinder.conf.

[keystone_authtoken]
auth_uri = http://controller:5000

Update the dashboard configuration on the controller node for compatibility with Havana.

The dashboard installation procedure and configuration file changed substantially between Grizzly and Havana. Particularly, if you are running Django 1.5 or later, you must ensure that /etc/openstack-dashboard/local_settings contains a correctly configured ALLOWED_HOSTS key that contains a list of hostnames recognized by the dashboard.

If users will access your dashboard using http://dashboard.example.com, you would set:

ALLOWED_HOSTS=['dashboard.example.com']

If users will access your dashboard on the local system, you would set:

ALLOWED_HOSTS=['localhost']

If users will access your dashboard using an IP address in addition to a hostname, you would set:

ALLOWED_HOSTS=['dashboard.example.com', '192.168.122.200']

Upgrade packages on the controller node to Havana, as shown below:

# apt-get update
# apt-get dist-upgrade

	Note
	Depending on your specific configuration, performing a dist-upgrade may restart services supplemental to your OpenStack environment. For example, if you use Open-iSCSI for Block Storage volumes and the upgrade includes a new open-scsi package, the package manager will restart Open-iSCSI services, which may cause the volumes for your users to be disconnected.

The package manager will ask you about updating various configuration files. We recommend denying these changes. The package manager will append .dpkg-dist to the end of newer versions of existing configuration files. You should consider adopting conventions associated with the newer configuration files and merging them with your existing configuration files after completing the upgrade process.

Stop each service, run the database synchronization command if necessary to update the associated database schema, and restart each service to apply the new configuration. Some services require additional commands:

The controller node update is complete. Now you can upgrade the compute nodes.

Upgrade packages on the compute nodes to Havana:

	Note
	Make sure you have removed the repository for Grizzly packages and added the repository for Havana packages.

# apt-get update
# apt-get dist-upgrade

	Warning
	Due to a packaging issue, this command may fail with the following error: Errors were encountered while processing: /var/cache/apt/archives/qemu-utils_1.5.0+dfsg-3ubuntu5~cloud0_amd64.deb /var/cache/apt/archives/qemu-system-common_1.5.0+dfsg-3ubuntu5~cloud0_amd64.deb E: Sub-process /usr/bin/dpkg returned an error code (1) You can fix this issue by using the following command: # apt-get -f install

The packaging system will ask about updating the /etc/nova/api-paste.ini file. As with the controller upgrade, we recommend denying these changes and reviewing the .dpkg-dist file after completing the upgrade process.

Restart Compute services:

# service nova-compute restart
# service nova-network restart
# service nova-api-metadata restart

Upgrade packages on the storage nodes to Havana:

# apt-get update
# apt-get dist-upgrade

	Note
	Make sure you have removed the repository for Grizzly packages and added the repository for Havana packages.

The packaging system will ask about updating the /etc/cinder/api-paste.ini file. Like the controller upgrade, we recommend denying these changes and reviewing the .dpkg-dist file after completing the upgrade process.

Restart Block Storage services.

# service cinder-volume restart