db2bb0cc01
a changed to an before OpenStack datas changed to data - plural removed all the extra spaces Change-Id: Id0a9b548b5818454f5428831eebef52f5b382b84
85 lines
3.1 KiB
Plaintext
85 lines
3.1 KiB
Plaintext
[[s-glance-api]]
|
|
==== Highly available OpenStack Image API
|
|
|
|
OpenStack Image Service offers a service for discovering, registering, and retrieving virtual machine images.
|
|
Making the OpenStack Image API service highly available in active / passive mode involves
|
|
|
|
* configuring OpenStack Image to listen on the VIP address,
|
|
* managing OpenStack Image API daemon with the Pacemaker cluster manager,
|
|
* configuring OpenStack services to use this IP address.
|
|
|
|
NOTE: Here is the http://docs.openstack.org/trunk/install-guide/install/apt/content/ch_installing-openstack-image.html[documentation] for installing OpenStack Image API service.
|
|
|
|
|
|
===== Adding OpenStack Image API resource to Pacemaker
|
|
|
|
First of all, you need to download the resource agent to your system:
|
|
|
|
----
|
|
cd /usr/lib/ocf/resource.d/openstack
|
|
wget https://raw.github.com/madkiss/openstack-resource-agents/master/ocf/glance-api
|
|
chmod a+rx *
|
|
----
|
|
|
|
You may now proceed with adding the Pacemaker configuration for
|
|
OpenStack Image API resource. Connect to the Pacemaker cluster with +crm
|
|
configure+, and add the following cluster resources:
|
|
|
|
----
|
|
include::includes/pacemaker-glance_api.crm[]
|
|
----
|
|
|
|
This configuration creates
|
|
|
|
* +p_glance-api+, a resource for manage OpenStack Image API service
|
|
|
|
+crm configure+ supports batch input, so you may copy and paste the
|
|
above into your live pacemaker configuration, and then make changes as
|
|
required. For example, you may enter +edit p_ip_glance-api+ from the
|
|
+crm configure+ menu and edit the resource to match your preferred
|
|
virtual IP address.
|
|
|
|
Once completed, commit your configuration changes by entering +commit+
|
|
from the +crm configure+ menu. Pacemaker will then start the OpenStack Image API
|
|
service, and its dependent resources, on one of your nodes.
|
|
|
|
===== Configuring OpenStack Image API service
|
|
|
|
Edit +/etc/glance/glance-api.conf+:
|
|
----
|
|
# We have to use MySQL connection to store data:
|
|
sql_connection=mysql://glance:password@192.168.42.101/glance
|
|
|
|
# We bind OpenStack Image API to the VIP:
|
|
bind_host = 192.168.42.103
|
|
|
|
# Connect to OpenStack Image Registry service:
|
|
registry_host = 192.168.42.103
|
|
|
|
# We send notifications to High Available RabbitMQ:
|
|
notifier_strategy = rabbit
|
|
rabbit_host = 192.168.42.102
|
|
----
|
|
|
|
|
|
===== Configuring OpenStack Services to use High Available OpenStack Image API
|
|
|
|
Your OpenStack services must now point their OpenStack Image API configuration to
|
|
the highly available, virtual cluster IP address -- rather than an
|
|
OpenStack Image API server's physical IP address as you normally would.
|
|
|
|
For OpenStack Compute, for example, if your OpenStack Image API service IP address is
|
|
192.168.42.104 as in the configuration explained here, you would use
|
|
the following line in your +nova.conf+ file:
|
|
|
|
----
|
|
glance_api_servers = 192.168.42.103
|
|
----
|
|
|
|
You need also to create the OpenStack Image API Endpoint with this IP.
|
|
|
|
NOTE: If you are using both private and public IP addresses, you should create two Virtual IP addresses and define your endpoint like this:
|
|
----
|
|
keystone endpoint-create --region $KEYSTONE_REGION --service-id $service-id --publicurl 'http://PUBLIC_VIP:9292' --adminurl 'http://192.168.42.103:9292' --internalurl 'http://192.168.42.103:9292'
|
|
----
|