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Nuage OSP Director 10 integration with ML2 Customizations
This document outlines the architecture of the integration project of using ML2 with Nuage as mechanism driver with OSP Director 10.
This document will focus on providing the information required to add and configure ML2 and Nuage.
The OSP Director is an image based installer. It uses a single image (named overcloud-full.qcow2) that is deployed on the Controller and Compute machines belonging to the overcloud OpenStack cluster. This image contains all the packages that are needed during the deployment. The deployment only creates the configuration files and databases required by the different services and starts the services in the correct order. Typically, there is no new software installation during the deployment phase. The packages/files required by ML2 will be added to this image as well.
The OSP Director architecture allows partners to create new templates to expose parameters specific to their modules and then the templates can be passed to the openstack ovecloud deploy command during the deployment.
Additionally, changes to the puppet manifests are required to handle the new values in the Hiera database and act on them to deploy the partner software. ML2 options will be added to the existing Nuage templates.
The integration of Nuage VSP with OSP Director involves the following steps:
For OSP Director 10.0, multiple changes are required, both for the overcloud-full.qcow2 image and the undercloud codebase as well. These changes are mentioned below and have been separated out in terms or being patched by the script or to be done manually based on the diff provided.
The changes required to create and modify the plugin.ini file for ML2 is upstreamed at this review. This review contains new code in manifests/plugins directory with the associated tests and custom resources. ID: https://review.openstack.org/#/c/483047/. This change is not in OSP-Director 10.0 yet. The patching script mentioned below will take care of this change.
Also, to support this addition of Nuage as mechanism driver, further changes are required for OpenStack Newton which are present at this review. This review contains new code to enable Nuage as mechanism driver with ML2. ID: https://review.openstack.org/#/c/481751/. This change is not in OSP-Director 10.0 yet. The patching script mentioned below will take care of this change.
From OSP Director 10.0 firewall rules are added by default. So, for releases Newton and later, tripleo-heat-templates were modified to add firewall rules for VxLAN and Metadata agent and the changes are at this review. This review contains the changes required to puppet files that enable Nuage specific code. ID: https://review.openstack.org/#/c/462286/. This change is not in OSP-Director 10.0 yet.
Lastly, since OpenStack Newton has capability for composable services, Nuage is added as mechanism driver with ML2 in a separate service to differentiate between Nuage as Neutron core plugin and Nuage as mechanism driver for ML2 as core plugin in tripleo-heat-templates at this review. This review contains Nuage mechanism driver as a composable service in tripleo-heat-templates. ID: https://review.openstack.org/#/c/492245/. These changes are not in OSP Director 10.0 as well and need to be added MANUALLY since these changes are required on the Undercloud.
All the manual changes required are provided in the diff at this link. This contains three diff_OSPD10 files containing the differences that need to be applied based on different versions and also a python script to apply these diffs. The steps for applying this patch are provided in the README here
Since the typical deployment scenario of OSP Director assumes that all the packages are installed on the overcloud-full image, we need to patch the overcloud-full image with the following RPMs:
- nuage-openstack-neutron
- nuage-openstack-neutronclient
- nuage-nova-extensions
- nuage-metadata-agent
- selinux-policy-nuage
- nuage-puppet-modules-4.0 ( link )
Also, we need to un-install OVS and Install VRS
- Un-install OVS
- Install VRS (nuage-openvswitch)
The installation of packages and un-installation of OVS can be done via this script.
Since the files required to configure plugin.ini, neutron.conf and ml2_conf.ini are not in the OSP-Director codebase, the changes can be added to the image using the same script. Copy the directory containing the 10_files at this link and execute the script. For the next release this code will be upstreamed.
Some of the generic neutron.conf and nova.conf parameters need to be configured in the heat templates. Also, the metadata agent needs to be configured. The tripleo-heat-templates repository needs the extraconfig templates to configure the Nuage specific parameters. The values of these parameters are dependent on the configuration of Nuage VSP. The "Sample Templates" section contains some 'probable' values for these parameters in files neutron-nuage-config.yaml and nova-nuage-config.yaml.
For Nuage VSP with OpenStack HA, we need to disable the default services like openvswitch-agent and dhcp-agent from being controlled via Pacemaker. These services are also disabled in neutron-nuage-config.yaml file.
A new puppet module is needed to create and populate the metadata agent config file and the VRS configuration in /etc/default/openvswitch. nuage-metadata-agent module will be included in Nuage-puppet-modules, along with other required Nuage packages. The section "Modification of overcloud-full image" mentions the steps for including Nuage-puppet-modules in the overcloud-full image used for Overcloud deployment.
The customer will receive all the RPMs and the script to patch the overcloud-full image with the RPMs. The user needs to create a local repo that is accessible from the machine that the script will run on and add all the RPMs to that repo. The machine also needs lib-guestfs-tools installed.
The script syntax is: source nuage_overcloud_full_patch.sh --RhelUserName=<value> --RhelPassword='<value>' --RepoName=Nuage --RepoBaseUrl=http://IP/reponame --RhelPool=<value> --ImageName='<value>' --Version=10
This script takes in following input parameters:
RhelUserName: User name for the RHEL subscription
RhelPassword: Password for the RHEL subscription
RhelPool: RHEL Pool to subscribe to for base packages
RepoName: Name for the local repo hosting the Nuage RPMs
RepoBaseUrl: Base URL for the repo hosting the Nuage RPMs
ImageName: Name of the qcow2 image (overcloud-full.qcow2 for example)
Version: OSP-Director version (10)
The undercloud deployment should proceed as per the OSP Director documentation. Follow all the steps before the openstack overcloud deploy command.
For an Openstack installation, a CMS (Cloud Management System) ID needs to be generated to configure with Nuage VSD installation. The assumption is that Nuage VSD and Nuage VSC are already running before overcloud is deployed.
Steps to generate it:
- Copy the folder to a machine that can reach VSD (typically the undercloud node)
- From the folder run the following command to generate CMS_ID:
python configure_vsd_cms_id.py --server <vsd-ip-address>:<vsd-port> --serverauth <vsd-username>:<vsd-password> --organization <vsd-organization> --auth_resource /me --serverssl True --base_uri /nuage/api/<vsp-version>"
example command :
python configure_vsd_cms_id.py --server 0.0.0.0:0 --serverauth username:password --organization organization --auth_resource /me --serverssl True --base_uri "/nuage/api/v5_0"
- The CMS ID will be displayed on the terminal as well as a copy of it will be stored in a file "cms_id.txt" in the same folder.
- This generated cms_id needs to be added to neutron-nuage-config.yaml template file for the parameter NeutronNuageCMSId
For OSP Director, tuskar deployment commands are recommended. But as part of Nuage integration effort, it was found that heat-templates provide more options and customization to overcloud deployment. The templates can be passed in "openstack overcloud deploy" command line options and can create or update an overcloud deployment.
For non-HA overcloud deployment, following command was used for deploying with Nuage:
openstack overcloud deploy --templates -e /home/stack/templates/nova-nuage-config.yaml -e /home/stack/templates/neutron-nuage-config.yaml --control-scale 1 --compute-scale 1 --ceph-storage-scale 0 --block-storage-scale 0 --swift-storage-scale 0
For Virtual deployment, need to add --libvirt-type parameter as:
openstack overcloud deploy --templates --libvirt-type qemu -e /home/stack/templates/nova-nuage-config.yaml -e /home/stack/templates/neutron-nuage-config.yaml --control-scale 1 --compute-scale 1 --ceph-storage-scale 0 --block-storage-scale 0 --swift-storage-scale 0
where:
neutron-nuage-config.yaml: Controller specific parameter values
nova-nuage-config.yaml: Compute specific parameter values
For HA deployment, following command was used for deploying with Nuage:
openstack overcloud deploy --templates -e /home/stack/templates/nova-nuage-config.yaml -e /home/stack/templates/neutron-nuage-config.yaml --control-scale 2 --compute-scale 2 --ceph-storage-scale 0 --block-storage-scale 0 --swift-storage-scale 0 --ntp-server ntp.zam.alcatel-lucent.com
For Virtual deployment, need to add --libvirt-type parameter as:
openstack overcloud deploy --templates --libvirt-type qemu -e /home/stack/templates/nova-nuage-config.yaml -e /home/stack/templates/neutron-nuage-config.yaml --control-scale 2 --compute-scale 2 --ceph-storage-scale 0 --block-storage-scale 0 --swift-storage-scale 0 --ntp-server ntp.zam.alcatel-lucent.com
where:
neutron-nuage-config.yaml: Controller specific parameter values
nova-nuage-config.yaml: Compute specific parameter values
# A Heat environment file which can be used to enable a
# a Neutron Nuage backend on the controller, configured via puppet
resource_registry:
OS::TripleO::Services::NeutronDhcpAgent: OS::Heat::None
OS::TripleO::Services::NeutronL3Agent: OS::Heat::None
OS::TripleO::Services::NeutronMetadataAgent: OS::Heat::None
OS::TripleO::Services::NeutronOvsAgent: OS::Heat::None
OS::TripleO::Services::ComputeNeutronOvsAgent: OS::Heat::None
# Override the NeutronCorePlugin to use Nuage
OS::TripleO::Services::NeutronCorePlugin: OS::TripleO::Services::NeutronCorePluginML2Nuage
parameter_defaults:
NeutronNuageNetPartitionName: 'Nuage_Partition'
NeutronNuageVSDIp: '192.0.2.190:8443'
NeutronNuageVSDUsername: 'csproot'
NeutronNuageVSDPassword: 'csproot'
NeutronNuageVSDOrganization: 'csp'
NeutronNuageBaseURIVersion: 'v5_0'
NeutronNuageCMSId: 'e6a6d911-5f58-4641-b9c9-72d391c6e13a'
UseForwardedFor: true
NeutronServicePlugins: 'NuagePortAttributes,NuageAPI,NuageL3'
NeutronDBSyncExtraParams: '--config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini --config-file /etc/neutron/plugins/nuage/plugin.ini'
NeutronTypeDrivers: "vxlan"
NeutronNetworkType: 'vxlan'
NeutronMechanismDrivers: "nuage"
NeutronPluginExtensions: "nuage_subnet,nuage_port,port_security"
NeutronVniRanges: "1:1000"
NovaOVSBridge: 'alubr0'
NeutronMetadataProxySharedSecret: 'NuageNetworksSharedSecret'
InstanceNameTemplate: 'inst-%08x'
# Heat environment file which can be used to enable
# Nuage backend on the compute, configured via puppet
resource_registry:
OS::TripleO::ComputeExtraConfigPre: /usr/share/openstack-tripleo-heat-templates/puppet/extraconfig/pre_deploy/compute/nova-nuage.yaml
OS::TripleO::Services::ComputeNeutronCorePlugin: /usr/share/openstack-tripleo-heat-templates/puppet/services/neutron-compute-plugin-nuage.yaml
parameter_defaults:
NuageActiveController: '192.0.2.191'
NuageStandbyController: '0.0.0.0'
NovaOVSBridge: 'alubr0'
NovaComputeLibvirtType: 'qemu'
NovaIPv6: False
NuageMetadataProxySharedSecret: 'NuageNetworksSharedSecret'
NuageNovaApiEndpoint: 'internalURL'
# Heat environment file which can be used to enable
# Nuage backend on the compute, configured via puppet
resource_registry:
OS::TripleO::ComputeExtraConfigPre: /usr/share/openstack-tripleo-heat-templates/puppet/extraconfig/pre_deploy/compute/nova-nuage.yaml
OS::TripleO::Services::ComputeNeutronCorePlugin: /usr/share/openstack-tripleo-heat-templates/puppet/services/neutron-compute-plugin-nuage.yaml
parameter_defaults:
NuageActiveController: '192.0.2.191'
NuageStandbyController: '0.0.0.0'
NovaOVSBridge: 'alubr0'
NovaComputeLibvirtType: 'kvm'
NovaIPv6: False
NuageMetadataProxySharedSecret: 'NuageNetworksSharedSecret'
NuageNovaApiEndpoint: 'internalURL'
This section described the details of the parameters specified in the template files. Also, the configuration files where these parameters are set and used. See OpenStack Newton user guide install section for more details.
The following parameters are mapped to values in /etc/neutron/plugins/nuage/plugin.ini file on the neutron controller
NeutronNuageNetPartitionName
Maps to default_net_partition_name parameter
NeutronNuageVSDIp
Maps to server parameter
NeutronNuageVSDUsername
NeutronNuageVSDPassword
Maps to serverauth as username:password
NeutronNuageVSDOrganization
Maps to organization parameter
NeutronNuageBaseURIVersion
Maps to the version in base_uri as /nuage/api/<version>
NeutronNuageCMSId
Maps to the cms_id parameter
The following parameters are mapped to values in /etc/neutron/neutron.conf file on the neutron controller
NeutronCorePlugin
Maps to core_plugin parameter in [DEFAULT] section
NeutronServicePlugins
Maps to service_plugins parameter in [DEFAULT] section
The following parameters are mapped to values in /etc/nova/nova.conf file on the neutron controller
UseForwardedFor
Maps to use_forwarded_for parameter in [DEFAULT] section
NeutronMetadataProxySharedSecret
Maps to metadata_proxy_shared_secret parameter in [neutron] section
InstanceNameTemplate
Maps to instance_name_template parameter in [DEFAULT] section
The following parameters are mapped to values in /etc/neutron/plugins/ml2/ml2_conf.ini file on the neutron controller
NeutronNetworkType
Maps to tenant_network_types in [ml2] section
NeutronPluginExtensions
Maps to extension_drivers in [ml2] section
NeutronTypeDrivers
Maps to type_drivers in [ml2] section
NeutronMechanismDrivers
Maps to mechanism_drivers in [ml2] section
NeutronFlatNetworks
Maps to flat_networks parameter in [ml2_type_flat] section
NeutronTunnelIdRanges
Maps to tunnel_id_ranges in [ml2_type_gre] section
NeutronNetworkVLANRanges
Maps to network_vlan_ranges in [ml2_type_vlan] section
NeutronVniRanges
Maps to vni_ranges in [ml2_type_vxlan] section
NeutronNuagePluginsML2FirewallDriver
Maps to firewall_driver in [securitygroup] section
The following parameters are used for setting/disabling services in undercloud's puppet code
OS::TripleO::Services::NeutronEnableDHCPAgent
OS::TripleO::Services::NeutronEnableL3Agent
OS::TripleO::Services::NeutronEnableMetadataAgent
OS::TripleO::Services::NeutronEnableOVSAgent
These parameters are used to disable the OpenStack default services as these are not used with Nuage integrated OpenStack cluster
The following parameter is used for setting values on the Controller using puppet code
NeutronNuageDBSyncExtraParams
String of extra command line parameters to append to the neutron-db-manage upgrade head command
The following parameters are mapped to values in /etc/default/openvswitch file on the nova compute
NuageActiveController
Maps to ACTIVE_CONTROLLER parameter
NuageStandbyController
Maps to STANDBY_CONTROLLER parameter
The following parameters are mapped to values in /etc/nova/nova.conf file on the nova compute
NovaOVSBridge
Maps to ovs_bridge parameter in [neutron] section
NovaComputeLibvirtType
Maps to virt_type parameter in [libvirt] section
NovaIPv6
Maps to use_ipv6 in [DEFAULT] section
The following parameters are mapped to values in /etc/default/nuage-metadata-agent file on the nova compute
NuageMetadataProxySharedSecret
Maps to METADATA_PROXY_SHARED_SECRET parameter. This need to match the setting in neutron controller above
NuageNovaApiEndpoint
Maps to NOVA_API_ENDPOINT_TYPE parameter. This needs to correspond to the setting for the Nova API endpoint as configured by OSP Director
This feature allows an OpenStack installation to support Single Root I/O Virtualization (SR-IOV)-attached VMs (https://wiki.openstack.org/wiki/SR-IOV-Passthrough-For-Networking) with VSP-managed VMs on the same KVM hypervisor cluster. It provides a Nuage ML2 mechanism driver that coexists with the sriovnicswitch mechanism driver.
Neutron ports attached through SR-IOV are configured by the sriovnicswitch mechanism driver. Neutron ports attached to Nuage VSD-managed networks are configured by the Nuage ML2 mechanism driver.
For OSP Director, tuskar deployment commands are recommended. But as part of Nuage integration effort, it was found that heat-templates provide more options and customization to overcloud deployment. The templates can be passed in "openstack overcloud deploy" command line options and can create or update an overcloud deployment.
For non-HA overcloud deployment, following command was used for deploying with Nuage:
openstack overcloud deploy --templates -e /home/stack/templates/nova-nuage-config.yaml -e /home/stack/templates/neutron-nuage-config.yaml -e /home/stack/templates/neutron-sriov.yaml --control-scale 1 --compute-scale 1 --ceph-storage-scale 0 --block-storage-scale 0 --swift-storage-scale 0
For Virtual deployment, need to add --libvirt-type parameter as:
openstack overcloud deploy --templates --libvirt-type qemu -e /home/stack/templates/nova-nuage-config.yaml -e /home/stack/templates/neutron-nuage-config.yaml -e /home/stack/templates/neutron-sriov.yaml --control-scale 1 --compute-scale 1 --ceph-storage-scale 0 --block-storage-scale 0 --swift-storage-scale 0
where:
neutron-nuage-config.yaml: Controller specific parameter values
nova-nuage-config.yaml: Compute specific parameter values
For HA deployment, following command was used for deploying with Nuage:
openstack overcloud deploy --templates -e /home/stack/templates/nova-nuage-config.yaml -e /home/stack/templates/neutron-nuage-config.yaml -e /home/stack/templates/neutron-sriov.yaml --control-scale 2 --compute-scale 2 --ceph-storage-scale 0 --block-storage-scale 0 --swift-storage-scale 0 --ntp-server ntp.zam.alcatel-lucent.com
For Virtual deployment, need to add --libvirt-type parameter as:
openstack overcloud deploy --templates --libvirt-type qemu -e /home/stack/templates/nova-nuage-config.yaml -e /home/stack/templates/neutron-nuage-config.yaml -e /home/stack/templates/neutron-sriov.yaml --control-scale 2 --compute-scale 2 --ceph-storage-scale 0 --block-storage-scale 0 --swift-storage-scale 0 --ntp-server ntp.zam.alcatel-lucent.com
where:
neutron-nuage-config.yaml: Controller specific parameter values
nova-nuage-config.yaml: Compute specific parameter values
# A Heat environment file which can be used to enable a
# a Neutron Nuage backend on the controller, configured via puppet
resource_registry:
OS::TripleO::Services::NeutronDhcpAgent: OS::Heat::None
OS::TripleO::Services::NeutronL3Agent: OS::Heat::None
OS::TripleO::Services::NeutronMetadataAgent: OS::Heat::None
OS::TripleO::Services::NeutronOvsAgent: OS::Heat::None
OS::TripleO::Services::ComputeNeutronOvsAgent: OS::Heat::None
# Override the NeutronCorePlugin to use Nuage
OS::TripleO::Services::NeutronCorePlugin: OS::TripleO::Services::NeutronCorePluginML2Nuage
parameter_defaults:
NeutronNuageNetPartitionName: 'Nuage_Partition'
NeutronNuageVSDIp: '192.0.2.112:8443'
NeutronNuageVSDUsername: 'csproot'
NeutronNuageVSDPassword: 'csproot'
NeutronNuageVSDOrganization: 'csp'
NeutronNuageBaseURIVersion: 'v4_0'
NeutronNuageCMSId: '3202ec2e-0119-4bee-8f66-be346b407f43'
UseForwardedFor: true
NeutronServicePlugins: 'NuagePortAttributes,NuageAPI,NuageL3,trunk,NuageNetTopology'
NeutronDBSyncExtraParams: '--config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini --config-file /etc/neutron/plugins/nuage/plugin.ini'
NeutronTypeDrivers: "vlan,vxlan,flat"
NeutronNetworkType: 'vxlan'
NeutronMechanismDrivers: ['nuage','nuage_sriov','sriovnicswitch']
NeutronPluginExtensions: "nuage_subnet,nuage_port,port_security"
NeutronFlatNetworks: '*'
NeutronTunnelIdRanges: "1:1000"
NeutronNetworkVLANRanges: "physnet1:2:100,physnet2:2:100"
NeutronVniRanges: "1001:2000"
NovaPatchConfigMonkeyPatch: true
NovaPatchConfigMonkeyPatchModules: 'nova.network.neutronv2.api:nuage_nova_extensions.nova.network.neutronv2.api.decorator'
NovaOVSBridge: 'alubr0'
NeutronMetadataProxySharedSecret: 'NuageNetworksSharedSecret'
InstanceNameTemplate: 'inst-%08x'
# A Heat environment file which can be used to enable
# Nuage backend on the compute, configured via puppet
resource_registry:
OS::TripleO::ComputeExtraConfigPre: /usr/share/openstack-tripleo-heat-templates/puppet/extraconfig/pre_deploy/compute/nova-nuage.yaml
OS::TripleO::Services::ComputeNeutronCorePlugin: /usr/share/openstack-tripleo-heat-templates/puppet/services/neutron-compute-plugin-nuage.yaml
parameter_defaults:
NuageActiveController: '192.0.2.120'
NuageStandbyController: '0.0.0.0'
NovaPCIPassthrough: "[{\"devname\":\"eno2\",\"physical_network\":\"physnet1\"},{\"devname\":\"eno3\",\"physical_network\":\"physnet2\"}]"
NovaOVSBridge: 'alubr0'
NovaComputeLibvirtType: 'qemu'
NovaIPv6: False
NuageMetadataProxySharedSecret: 'NuageNetworksSharedSecret'
NuageNovaApiEndpoint: 'internalURL'
# A Heat environment file which can be used to enable
# Nuage backend on the compute, configured via puppet
resource_registry:
OS::TripleO::ComputeExtraConfigPre: /usr/share/openstack-tripleo-heat-templates/puppet/extraconfig/pre_deploy/compute/nova-nuage.yaml
OS::TripleO::Services::ComputeNeutronCorePlugin: /usr/share/openstack-tripleo-heat-templates/puppet/services/neutron-compute-plugin-nuage.yaml
parameter_defaults:
NuageActiveController: '192.0.2.120'
NuageStandbyController: '0.0.0.0'
NovaPCIPassthrough: "[{\"devname\":\"eno2\",\"physical_network\":\"physnet1\"},{\"devname\":\"eno3\",\"physical_network\":\"physnet2\"}]"
NovaOVSBridge: 'alubr0'
NovaComputeLibvirtType: 'kvm'
NovaIPv6: False
NuageMetadataProxySharedSecret: 'NuageNetworksSharedSecret'
NuageNovaApiEndpoint: 'internalURL'
## A Heat environment that can be used to deploy SR-IOV
resource_registry:
OS::TripleO::Services::NeutronSriovAgent: /usr/share/openstack-tripleo-heat-templates/puppet/services/neutron-sriov-agent.yaml
parameter_defaults:
# Add PciPassthroughFilter to the scheduler default filters
NovaSchedulerDefaultFilters: ['RetryFilter','AvailabilityZoneFilter','RamFilter','ComputeFilter','ComputeCapabilitiesFilter','ImagePropertiesFilter','ServerGroupAntiAffinityFilter','ServerGroupAffinityFilter','PciPassthroughFilter']
NovaSchedulerAvailableFilters: ['nova.scheduler.filters.all_filters']
# Provide the vendorid:productid of the VFs
NeutronSupportedPCIVendorDevs: ['8086:154c','8086:10ca','8086:1520']
NeutronPhysicalDevMappings: "datacentre:eno2,physnet2:eno3"
# Number of VFs that needs to be configured for a physical interface
NeutronSriovNumVFs: "eno2:5,eno3:7"
Then for the node that was shutdown
nova start <node_name> as in overcloud-controller-0
Once the node is up, execute the following on the node
pcs cluster start --all
pcs status
If the services do not come up, then try
pcs resource cleanup
virt-customize: error: libguestfs error: could not create appliance through
libvirt.
Try running qemu directly without libvirt using this environment variable:
export LIBGUESTFS_BACKEND=direct
Run the following command before executing the script
export LIBGUESTFS_BACKEND=direct
openstack baremetal import --json instackenv.json
No valid host was found. Reason: No conductor service registered which supports driver pxe_ipmitool. (HTTP 404)
Workaround: Install python package python-dracclient and restart ironic-conductor service. Then try the command again
sudo yum install -y python-dracclient
exit (go to root user)
systemctl restart openstack-ironic-conductor
su - stack (switch to stack user)
source stackrc (source stackrc)
[stack@instack ~]$ heat stack-list
WARNING (shell) "heat stack-list" is deprecated, please use "openstack stack list" instead
+----+------------+--------------+---------------+--------------+
| id | stack_name | stack_status | creation_time | updated_time |
+----+------------+--------------+---------------+--------------+
+----+------------+--------------+---------------+--------------+
[stack@instack ~]$ nova list
+----+------+--------+------------+-------------+----------+
| ID | Name | Status | Task State | Power State | Networks |
+----+------+--------+------------+-------------+----------+
+----+------+--------+------------+-------------+----------+
[stack@instack ~]$ ironic node-list
+--------------------------------------+------+--------------------------------------+-------------+--------------------+-------------+
| UUID | Name | Instance UUID | Power State | Provisioning State | Maintenance |
+--------------------------------------+------+--------------------------------------+-------------+--------------------+-------------+
| 9e57d620-3ec5-4b5e-96b1-bf56cce43411 | None | 1b7a6e50-3c15-4228-85d4-1f666a200ad5 | power off | available | False |
| 88b73085-1c8e-4b6d-bd0b-b876060e2e81 | None | 31196811-ee42-4df7-b8e2-6c83a716f5d9 | power off | available | False |
| d3ac9b50-bfe4-435b-a6f8-05545cd4a629 | None | 2b962287-6e1f-4f75-8991-46b3fa01e942 | power off | available | False |
+--------------------------------------+------+--------------------------------------+-------------+--------------------+-------------+
Workaround: Manually remove instance_uuid reference
ironic node-update <node_uuid> remove instance_uuid
E.g. ironic node-update 9e57d620-3ec5-4b5e-96b1-bf56cce43411 remove instance_uuid