Difference between revisions of "Ironic/NovaBaremetalIronicMigration"

Revision as of 21:47, 10 September 2014

Nova Bare-metal to Ironic migration

Assumptions / Requirements

• Migration is only supported *within* Juno release
• Migrating live instances between virt drivers in Nova is not tested! It is NOT recommended.
• Migrating from Icehouse-baremetal -> Juno-ironic is not supported
• The nova-compute and nova-scheduler will need to be restarted
• Icehouse Nova deployed with:
  • Nova "bare-metal" driver
  • Populated nova_bm database
  • Nova Juno release admin upgrades applied
• Deploy-ironic kernel and ramdisk, uploaded in to glance ( DIB )
• Empty Ironic database exists

High Level Walk Through

• Start maintenance period (to prevent API service access for upgrade)
• Stop Nova services
  • Compute
  • Scheduler
• Update nova-compute configuration (nova.conf)
  • Change settings
    • compute_driver
      • nova.virt.ironic.IronicDriver
    • scheduler_host_manager
      • nova.scheduler.ironic_host_manager.IronicHostManager
  • Add an [ironic] section (example)
    • admin_username = ironic
    • admin_password = password
    • admin_url = http://keystone.host:35357/v2.0
    • admin_tenant_name = service
  • Remove the [baremetal] section (example)
    • sql_connection = db
    • tftp_root = /tftpboot
    • flavor_extra_specs = cpu_arch:arch
    • driver = nova.virt.baremetal.pxe.PXE
    • pxe_network_config=True
    • pxe_deploy_timeout= pxe_deploy_timeout
    • power_manager = power_manager
    • virtual_power_host_user=user
    • virtual_power_host_key=/mnt/state/var/lib/nova/virtual-power-key
    • virtual_power_ssh_host=ssh_host
    • virtual_power_type=type
  • Update flavor metadata to reference Ironic's deploy kernel & ramdisk
  • Run ironic-nova-bm-migrate script to migrate nova-bm nodes and interfaces to ironic nodes and ports
  • Start Ironic services
    • Conductor
    • Api
  • Ensure proper start-up
  • Restart Nova services
    • Compute
    • Scheduler
  • End maintenance period