Configuring VMware instance snapshot stored on customized datastore

From IBM® Cloud Manager with OpenStack 4.3 FP8 ifix1, IBM Cloud Manager with OpenStack can support to specify datastore to store the VMware instance snapshot.

1. Let the IBM Cloud Manager with OpenStack VMware driver create a VM template in vCenter when you take a snapshot. Otherwise, the VMware driver creates a VMDK file when it takes a snapshot. The default value of snapshot_image_format is vmdk.

   Edit the snapshot_image_format to template in nova-discovery.conf and nova compute configuration file, as follows:

   [vmware]

   snapshot_image_format = template

2. Modify the Glance API server configuration file to specify the datastore backend that is used to store images.

   Edit the/etc/glance/glance-api.conf file, as follows:

   [DEFAULT]

   vmware_server_username = VCENTER_USERNAME
   vmware_server_password = VCENTER_PASSWORD
   vmware_datacenter_path = DATACENTER_NAME
   vmware_datastore_name = TARGET_DATASTORE_NAME
   
   vmware_store_image_dir = /openstack_glance
   show_image_direct_url = True 
   
   [glance_store]
   default_store = vsphere
   stores = file, vmware_datastore, glance.store.vmware_datastore.Store
   

   Note:

   The value of vmware_datastore_name is the target datastore name that will store the instance snapshot, and it must be in the same cluster with the datastore of the booted vmware instance.

3. Modify the nova configuration.

   In nova compute configuration file, add what follows:

   [vmware]

   image_datastore = TARGET_DATASTORE_NAME

   Note: The target datastore must be the same as the value of vmware_datastore_name in glance-api.conf.
4. Restart the openstack-glance-api, openstack-nova-api, openstack-nova-compute and nova-discovery services.