ironic/install-guide/source/include/configure-nova-compute.rst

Configure Compute to use the Bare Metal service

The Compute service needs to be configured to use the Bare Metal service's driver. The configuration file for the Compute service is typically located at /etc/nova/nova.conf.

Note

This configuration file must be modified on the Compute service's controller nodes and compute nodes.

1. Change these configuration options in the default section, as follows:

   [default]
   
   # Driver to use for controlling virtualization. Options
   # include: libvirt.LibvirtDriver, xenapi.XenAPIDriver,
   # fake.FakeDriver, baremetal.BareMetalDriver,
   # vmwareapi.VMwareESXDriver, vmwareapi.VMwareVCDriver (string
   # value)
   #compute_driver=<None>
   compute_driver=ironic.IronicDriver
   
   # Firewall driver (defaults to hypervisor specific iptables
   # driver) (string value)
   #firewall_driver=<None>
   firewall_driver=nova.virt.firewall.NoopFirewallDriver
   
   # The scheduler host manager class to use (string value)
   #scheduler_host_manager=host_manager
   scheduler_host_manager=ironic_host_manager
   
   # Virtual ram to physical ram allocation ratio which affects
   # all ram filters. This configuration specifies a global ratio
   # for RamFilter. For AggregateRamFilter, it will fall back to
   # this configuration value if no per-aggregate setting found.
   # (floating point value)
   #ram_allocation_ratio=1.5
   ram_allocation_ratio=1.0
   
   # Amount of disk in MB to reserve for the host (integer value)
   #reserved_host_disk_mb=0
   reserved_host_memory_mb=0
   
   # Flag to decide whether to use baremetal_scheduler_default_filters or not.
   # (boolean value)
   #scheduler_use_baremetal_filters=False
   scheduler_use_baremetal_filters=True
   
   # Determines if the Scheduler tracks changes to instances to help with
   # its filtering decisions (boolean value)
   #scheduler_tracks_instance_changes=True
   scheduler_tracks_instance_changes=False
   
   # New instances will be scheduled on a host chosen randomly from a subset
   # of the N best hosts, where N is the value set by this option.  Valid
   # values are 1 or greater. Any value less than one will be treated as 1.
   # For ironic, this should be set to a number >= the number of ironic nodes
   # to more evenly distribute instances across the nodes.
   #scheduler_host_subset_size=1
   scheduler_host_subset_size=9999999

2. Change these configuration options in the ironic section. Replace:

   • IRONIC_PASSWORD with the password you chose for the ironic user in the Identity Service
   • IRONIC_NODE with the hostname or IP address of the ironic-api node
   • IDENTITY_IP with the IP of the Identity server

   [ironic]
   
   # Ironic keystone admin name
   admin_username=ironic
   
   #Ironic keystone admin password.
   admin_password=IRONIC_PASSWORD
   
   # keystone API endpoint
   admin_url=http://IDENTITY_IP:35357/v2.0
   
   # Ironic keystone tenant name.
   admin_tenant_name=service
   
   # URL for Ironic API endpoint.
   api_endpoint=http://IRONIC_NODE:6385/v1

3. On the Compute service's controller nodes, restart the nova-scheduler process:

   Fedora/RHEL7/CentOS7:
     sudo systemctl restart openstack-nova-scheduler
   
   Ubuntu:
     sudo service nova-scheduler restart

4. On the Compute service's compute nodes, restart the nova-compute process:

   Fedora/RHEL7/CentOS7:
     sudo systemctl restart openstack-nova-compute
   
   Ubuntu:
     sudo service nova-compute restart