ha-guide/doc/ha-guide/source/storage-ha-manila.rst

Highly available Shared File Systems API

Making the Shared File Systems (manila) API service highly available in active/passive mode involves:

• ha-manila-pacemaker
• ha-manila-configure
• ha-manila-services

Add Shared File Systems API resource to Pacemaker

You must first download the resource agent to your system:

# cd /usr/lib/ocf/resource.d/openstack
# wget https://git.openstack.org/cgit/openstack/openstack-resource-agents/plain/ocf/manila-api
# chmod a+rx *

You can now add the Pacemaker configuration for the Shared File Systems API resource. Connect to the Pacemaker cluster with the crm configure command and add the following cluster resources:

primitive p_manila-api ocf:openstack:manila-api \
   params config="/etc/manila/manila.conf"
   os_password="secretsecret"
   os_username="admin" \
   os_tenant_name="admin"
   keystone_get_token_url="http://10.0.0.11:5000/v2.0/tokens" \
   op monitor interval="30s" timeout="30s"

This configuration creates p_manila-api, a resource for managing the Shared File Systems API service.

The crm configure supports batch input, so you may copy and paste the lines above into your live Pacemaker configuration and then make changes as required. For example, you may enter edit p_ip_manila-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 then starts the Shared File Systems API service and its dependent resources on one of your nodes.

Configure Shared File Systems API service

Edit the /etc/manila/manila.conf file:

# We have to use MySQL connection to store data:
sql_connection = mysql+pymysql://manila:password@10.0.0.11/manila?charset=utf8

# We bind Shared File Systems API to the VIP:
osapi_volume_listen = 10.0.0.11

# We send notifications to High Available RabbitMQ:
notifier_strategy = rabbit
rabbit_host = 10.0.0.11

Configure OpenStack services to use HA Shared File Systems API

Your OpenStack services must now point their Shared File Systems API configuration to the highly available, virtual cluster IP address rather than a Shared File Systems API server’s physical IP address as you would for a non-HA environment.

You must create the Shared File Systems API endpoint with this IP.

If you are using both private and public IP addresses, you should create two virtual IPs and define your endpoints like this:

$ openstack endpoint create --region RegionOne \
  sharev2 public 'http://PUBLIC_VIP:8786/v2/%(tenant_id)s'

$ openstack endpoint create --region RegionOne \
  sharev2 internal 'http://10.0.0.11:8786/v2/%(tenant_id)s'

$ openstack endpoint create --region RegionOne \
  sharev2 admin 'http://10.0.0.11:8786/v2/%(tenant_id)s'