Difference between revisions of "Ironic/NovaBaremetalIronicMigration"

Revision as of 16:39, 11 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
• A correctly set up Diskimage-builder

High Level Walk Through

• Build deploy-ironic kernel and ram-disk (Example)
• Create empty Ironic database (Example)
• Start maintenance period (to prevent API service access for upgrade)
• Stop Nova services (Example)
• Update nova-compute configuration (nova.conf)
  • Change settings (Example)
  • Add an [ironic] section (Example)
  • Remove the [baremetal] section (Example)
• Update flavor metadata to reference Ironic's deploy kernel & ramdisk (Example)
• Run migrate_db script (Example)
• Start Ironic services (Example)
• Ensure proper service start-up (Example)
• (Re)start Nova services (Example)
• End maintenance period

Detailed examples

Build kernel and ram-disk

 diskimage-builder/bin/ramdisk-image-create -a $NODE_ARCH $NODE_DIST deploy-ironic -o deploy-ironic $DIB_ELEMENTS

Create_empty_database

 TBA

Stop services

 sudo service nova-compute stop
 sudo service nova-scheduler stop

Changes

 compute_driver = nova.virt.ironic.IronicDriver
 scheduler_host_manager = nova.scheduler.ironic_host_manager.IronicHostManager

Ironic section

 [ironic]
 admin_username = ironic
 admin_password = password
 admin_url = http://keystone.host:35357/v2.0
 admin_tenant_name = service

Baremetal section

 [Baremetal] 
 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

 dkid=$(glance image-create --name "deploy-ironic-kernel" --public --disk-format aki --file deploy-ironic.kernel | awk ' / id / {print $4}')
 drid=$(glance image-create --name "deploy-ironic-ramdisk" --public --disk-format ari --file deploy-ironic.initramfs | awk ' / id / {print $4}')
 nova flavor-key baremetal set "baremetal:deploy_kernel_id"="$dkid"
 nova flavor-key baremetal set "baremetal:deploy_ramdisk_id"="$drid"

Run migrate script

 TBA

Start Ironic services

 sudo service ironic-api start
 sudo service ironic-conductor start

Ensure service start-up

 TBA

Start Nova services

 sudo service nova-compute start
 sudo service nova-scheduler start