Release Notes Red Hat OpenStack Platform 15

parameter_defaults:
    ComputeExtraConfig:
      nova::config::nova_config:
        [compute]/max_disk_devices_to_attach:
            value: '"30"'
In Red Hat OpenStack Platform 15, you can specify MTU (maximum transmission unit) settings for each network, and RHOSP will automatically write those settings to the network interface configuration templates. MTU values should be set in the network_data.yaml file.

This enhancement alleviates the step of manually updating the network templates for each role, and reduces the likelihood of manual entry errors.
The Shared File Systems service (manila) API now supports Transport Layer Security (TLS) endpoints on the internal API network, through SSL/TLS certificates. The Shared File Systems service is automatically secured when you opt to secure Red Hat OpenStack Platform during deployment.
In Red Hat OpenStack Platform 15, which depends on Red Hat Enterprise Linux 8, there is a new default Time service, chrony.

With this switch, Red Hat highly recommends that you use multiple Network Time Protocol (NTP) servers for both the undercloud and overcloud deployments.
In Red Hat Open Stack Platform 15, the Data Processing service (sahara) plug-ins have been decoupled and are now installed as libraries.

To obtain newer versions of Data Processing service plug-ins, you no longer have to upgrade RHOSP. Instead, install the newest version of the desired plug-in.
You can now configure automatic restart of VM instances on a Compute node if the compute node reboots without first migrating the instances.

With the following two new parameters, you can configure the Red Hat OpenStack Platform Compute service (nova) and the libvirt-guests agent to shut down VM instances gracefully and start them when the Compute node reboots:

 - NovaResumeGuestsStateOnHostBoot (True or False)
 - NovaResumeGuestsShutdownTimeout (default, 300s)
In Red Hat OpenStack Platform 15, director uses version 5.5 of Puppet.
In Red Hat OpenStack Platform 15, a new role and environment file have been added to enable the undercloud to deploy an all-in-one overcloud node that contains both the controller services and compute services. The new role and the new environment file are named, respectively, roles/Standalone.yaml and environments/standalone/standalone-overcloud.yaml.

Because this new architecture does not yet support high availability, Red Hat cannot guarantee zero down time during RHOSP 15 updates and upgrades. For this reason, Red Hat highly recommends that you properly back up your system.
Red Hat OpenStack Platform director now has the ability to control Block Storage service (cinder) snapshots on NFS back ends. A new director parameter, CinderNfsSnapshotSupport, has a default value of True.
Using the Red Hat OpenStack Platform director, you can now configure the Image service (glance) to have an optional local image cache. You turn on the image cache, by setting the “GlanceCacheEnabled” property to True.

A typical use case for the image cache is edge computing. Because the Image service resides at central site, you can deploy and enable the image cache at remote sites and save bandwidth and reduce the Image service’s boot time.
With Paunch you can now manage container memory consumption using three new attributes: mem_limit, memswap_limit, and mem_swappiness.
In Red Hat OpenStack Platform 15, if the back end driver supports it, you can now simultaneously attach a volume to multiple machines for both the Block Storage service (cinder) and the Compute service (nova). This feature addresses the use case for clustered application workloads that typically requires active/active or active/standby scenarios.
In Red Hat OpenStack Platform 15, the Image service (glance) is automatically configured for any glance-import execution to convert imported images into RAW format when Red Hat Ceph Storage is used as the back end for the Image service.
The Load Balancing service (octavia) now provides the capability to refine access policies for its load balancers, by allowing you to change security group ownership to a security group associated with a user project. (The user project must be on the whitelist.)

In previous RHOSP releases, you could not restrict access to the load balancer, because octavia exclusively assigned the project ID to the security group associated with the VIP and VRRP ports on the load balancing agent (amphora).
The director can now deploy different, isolated Ceph clusters into different Edge zones by creating an overcloud composed of multiple Heat stacks. For example, the director can deploy an overcloud consisting of a Heat stack for the control plane (Controller nodes) and multiple additional stacks for Edge zones (Computes and Ceph Storage nodes or Compute and HCI nodes).
Neutron bulk port creation (create multiple ports in a single request) has been optimized for speed and is now significantly faster. The benefits of this improvement include faster initialization of containers via Kuryr on neutron networks.
A new Red Hat OpenStack Platform Bare Metal service (ironic) driver for XClarity managed Lenovo devices is available. The xclarity driver provides more reliable operation on Lenovo devices managed with XClarity, and opportunities for additional vendor-specific features in the future.
Red Hat OpenStack Platform Bare Metal service (ironic) now has a BIOS management interface, with which you can inspect and modify a device’s BIOS configuration.

In Red Hat OpenStack Platform 15, the Bare Metal service supports BIOS management capabilities for data center devices that are Redfish API compliant. The Bare Metal service implements Redfish calls through the Python library, Sushy.
Red Hat OpenStack Platform undercloud networks are now layer 3 (L3) capable. This enhancement enables all segments to use one network, and alleviates the need for service net map overrides.

This enhancement is important for Red Hat OpenStack Platform edge computing sites that deploy roles in different sites and make service net map overrides unwieldy.
As a technology preview in Red Hat OpenStack Platform 15, the novajoin service tech uses the new, versioned format of notifications sent by the Compute service (nova).

To enable the new format, set the value of the new configuration setting, configuration_format, to "versioned." The default value for configuration_format is "unversioned".

In a future version of RHOSP, unversioned notifications will be deprecated.
As a technology preview in Red Hat OpenStack Platform 15, the novajoin service uses the Python 3 runtime.
With this technology preview, it is possible to configure Barbican through Director to store secrets using the ATOS Trustway Proteccio NetHSM. This is mediated through the Barbican PKCS#11 back-end plugin.

The technology preview is provided in the following packages:
 - openstack-barbican
 - tripleo-heat-templates
With this technology preview, it is possible to configure Barbican through director to store secrets using the nCipher NetShield Connect NetHSM. This is mediated through the Barbican PKCS#11 back end plug-in.

The technology preview is provided in the following packages:
 - openstack-barbican
 - tripleo-heat-templates
With Red Hat OpenStack Platform director you can now deploy the Block Storage service (cinder) in an active-active configuration on Ceph RADOS Block Device (RBD) back ends only.

The new cinder-volume-active-active.yaml file defines the active-active cluster name by assigning a value to the CinderVolumeCluster parameter. CinderVolumeCluster is a global Block Storage parameter, and prevents you from including clustered (active-active) and non-clustered back ends in the same deployment.

The cinder-volume-active-active.yaml file causes director to use the non-Pacemaker, cinder-volume Orchestration service template, and adds the etcd service to your Red Hat OpenStack Platform deployment as a distributed lock manager (DLM).
With Red Hat OpenStack Platform director you can now configure different availability zones for Block Storage service (cinder) volume back ends. Director has a new parameter, CinderXXXAvailabilityZone, where XXX is associated with a specific back end.
Because Red Hat Ceph Storage 4 is at beta when Red Hat OpenStack Platform 15 is at GA, a new configuration option has been added to RHOSP 15 to prevent any accidental deployments of Red Hat Ceph Storage 4 Beta in a production environment.

The new Orchestration service (heat) configuration option, EnableRhcs4Beta, is set by default to "False", and therefore prevents director from deploying Red Hat Ceph Storage 4 Beta by accident.
The Shared File Systems service (manila) API now runs behind the Apache HTTP Server (httpd). The Apache error and access logs from the Shared File Systems service are available in /var/log/containers/httpd/manila-api on all the nodes that run the manila API container.

The log location of the main API service (manila-api) has not changed, and continues to be written on each node in /var/log/containers/manila/.
The Block Storage service (cinder) command, "snapshot-manageable-list," now lists the snapshots on the back end for Red Hat Ceph RADOS block devices (RBD).
In Red Hat OpenStack Platform 15, the director parameter used during overcloud container preparation, deltarpm, has been renamed to, drpm.
Because Red Hat Ceph Storage 4 is at beta when Red Hat OpenStack Platform 15 is at GA, a new configuration option has been added to RHOSP 15 to prevent any accidental deployments of Red Hat Ceph Storage 4 Beta in a production environment.

The new Orchestration service (heat) configuration option, EnableRhcs4Beta, is set by default to "False", and therefore prevents director from deploying Red Hat Ceph Storage 4 Beta by accident.
There is a known issue wherein deployments will fail with the following message.

`puppet-user: Error: Parameter value failed on Vs_config[other_config:n-revalidator-threads]: Invalid external_ids 1. Requires a String, not a Integer`

This is due to tripleo parameters of type integer being expected by puppet to be of type string. To work around, include the following in deployment templates:

ComputeOvsDpdkSriovExtraConfig:
  "vswitch::dpdk::handler_cores": "1"
  "vswitch::dpdk::revalidator_cores": "1"
In Red Hat OpenStack Platform 15, director can only deploy Red Hat Ceph Storage v4. At this time, Ceph Storage v4 is still in its beta version. OpenStack Platform 15 will not support director-deployed Ceph until Ceph Storage v4 is generally available.

For testing purposes, you can deploy Ceph Storage v4 beta, but the beta version is not supported for use in production. Refer to the documentation for instructions on how to enable Ceph Storage v4 beta.
When running Red Hat OpenStack Platform 15 on a Q35 machine, there is a maximum limit of 500 devices. This is known problem with QEMU, an open source virtualizer and machine emulator.
When running the command "openstack stack show <stack_name>" on a stack with a large amount of data (for example, the 'overcloud' stack), the output can be difficult to read because  some columns are too wide.

Red Hat recommends that you change the default output width.

Here is an example:

$ openstack stack show overcloud --max-width 100
Red Hat OpenStack Platform deployments that use the Linux bridge ML2 driver and agent are unprotected against Address Resolution Protocol (ARP) spoofing. The version of Ethernet bridge frame table administration (ebtables) that is part of Red Hat Enterprise Linux 8 is incompatible with the Linux bridge ML2 driver.

The Linux Bridge ML2 driver and agent were deprecated in Red Hat OpenStack Platform 11, and should not be used.

Red Hat recommends that you use instead the ML2 Open Virtual Network (OVN) driver and services, the default deployed by the Red Hat OpenStack Platform director.
Red Hat OpenStack Platform (RHOSP) does not yet support upgrading to version 15 from earlier RHOSP versions. Support for upgrading will be added to a future update of RHOSP 15.
The Compute services (nova) can fail to deploy because the nova_wait_for_compute_service script is unable to query the Nova API. If a remote container image registry is used outside of the undercloud, the Nova API service might not finish deploying in time.

The workaround is to rerun the deployment command, or to use a local container image registry on the undercloud.
If you use Security Group rules that span across a port range (--dst-port X:Y), an OVN bug causes traffic filtering to fail and all traffic to be dropped.

Workaround: Create one rule per port instead of using a port range.
Currently, you cannot use Orchestration (heat) templates with the director to deploy an overcloud that requires NFS as an Image service (glance) back end. There is currently no workaround for this issue.
In Red Hat OpenStack Platform 15, a part of the Telemetry service, gnocchi, has been deprecated.

In a future RHOSP version, gnocchi, and the rest of the Telemetry service will be removed and replaced by the Red Hat Service Assurance Framework.
In Red Hat OpenStack Platform 15, the Alarm service (aodh) that is part of the Telemetry service, is deprecated.

In a future Red Hat OpenStack Platform version, the Alarm service will be removed.
The OpenStack EC2 API is deprecated in this release and is no longer supported.
In Red Hat OpenStack Platform 15, the monitoring agent, Sensu client service, is deprecated.

In a future Red Hat OpenStack Platform version, the Sensu client service will be removed.
In Red Hat OpenStack Platform 15, the Data Processing service (sahara) is deprecated, and will be removed in version 16. Support for the Data Processing service continues in Red Hat OpenStack Platform 15 and earlier supported versions.
In Red Hat OpenStack Platform 15, Red Hat OpenStack director (TripleO) no longer supports deploying Red Hat OpenShift Container Platform 3.11 clusters on bare metal nodes using the OpenShift installation playbooks (provided in the openshift-ansible package) and Orchestration service (heat) templates.

To deploy OpenShift 3.11 on bare metal nodes, use the OpenShift installation playbooks exclusively without Orchestration service templates. You can provision Red Hat Enterprise Linux on bare metal nodes using Red Hat OpenStack Platform with the Bare Metal service (ironic) or by performing a manual installation.
In Red Hat OpenStack Platform 15, the legacy network scripts are deprecated. In a future Red Hat OpenStack Platform version, the legacy network scripts will be removed and replaced by Red Hat Enterprise Linux NetworkManager.
In Red Hat OpenStack Platform 15, the Nova vCenter plug-in is deprecated. It will be removed in version 16.
The Load Balancing service (octavia) now provides the capability to refine access policies for its load balancers, by allowing you to change security group ownership to a security group associated with a user project. (The user project must be on the whitelist.)

In previous RHOSP releases, you could not restrict access to the load balancer, because octavia exclusively assigned the project ID to the security group associated with the VIP and VRRP ports on the load balancing agent (amphora).
Neutron bulk port creation (create multiple ports in a single request) has been optimized for speed and is now significantly faster. The benefits of this improvement include faster initialization of containers via Kuryr on neutron networks.
The internal locking model in the container infrastructure changed between podman 1.0.5 (RHEL 8.0) and 1.4.2 (RHEL 8.1). As a result, you cannot update a Red Hat OpenStack Platform (RHOSP) 15 deployment from Red Hat Enterprise Linux (RHEL) 8.0 to RHEL 8.1 without downtime.

There is currently no known workaround. Red Hat is actively working on a solution to this problem. New deployments on RHEL 8.1 with the RHEL 8.1 RHOSP 15 containers work correctly.

If you deployed RHOSP 15 on RHEL 8.0, contact Red Hat support for advisement.
Due to an incompatibility between the version of pacemaker in Red Hat Enterprise Linux (RHEL) 8.0-based containers and RHEL 8.1-based hosts, you cannot migrate from RHEL 8.0 to 8.1 for deployed Red Hat OpenStack Platform (RHOSP) 15 environments.

There is currently no known workaround. Red Hat is actively working on a solution to this problem. New deployments of RHOSP 15 on RHEL 8.1 work correctly.

If you deployed RHOSP 15 on RHEL 8.0, contact Red Hat Support for advisement.
There is a known issue when building container images with buildah. The default format for the image is OCI, but podman 1.6.x contains stricter restrictions about container format metadata. As a result, containers that you push to the undercloud registry can fail if they were originally in OCI format.

The workaround is to use the --format docker option to build images in docker format instead of OCI format, and you can push the containers to the undercloud registry successfully.
Previously, the nouveau kernel module was included in initramfs and conflicted with the nVidia vGPU drivers. As a result, the boot process could hang on RHOSP RHEL8 compute nodes with nVidia vGPU cards and drivers installed.

With this update, nouveau is explicitly omitted from the RHOSP initramfs.
Previously, there was a change to the log parameter in the podman interface that introduced an issue with tripleo-heat-templates, which caused updates to fail.

With this update, the issue has been resolved and updates pass successfully.
The Compute services (nova) can fail to deploy because the nova_wait_for_compute_service script is unable to query the Nova API. If you use a remote container image registry outside of the undercloud, the Nova API service might not finish deploying in time.

The workaround is to rerun the deployment command, or to use a local container image registry on the undercloud.
Previously, changing the default membership role from Member to member caused ceph-rgw to deny access to standard users because keystone roles are case insensitive, but ceph-rgw role matching is case sensitive. As a result, users with the member role could not access ceph-rgw.

With this update, ceph-rgw accepts users with both Member and member roles.
Previously, deploying the stack with all networks disabled failed because the 'cloud_name_{{network.name_lower}}' property was defined for disabled networks.

With this update, the 'cloud_name_{{network.name_lower}}' property is no longer added for disabled networks and deployments are successful.
With this update, the credentials that you supply in the ContainerImageRegistryCredentials parameter pass to ceph-ansible automatically if the registry name matches the registry name in the ceph_namespace parameter.
In Red Hat OpenStack Platform (RHOSP) 15, the rhel-registration pre-deployment script has been removed because it is not compatible with RHEL8. Use the Ansible-based overcloud registration method instead:

https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/15/html/advanced_overcloud_customization/ansible-based-registration
Previously, the default NIC naming changed to use non-persistent node names such as ethXX instead of consistent names like enoX, ensXfY, ensX. As a result, the NIC names present in the introspection data did not match the overcloud NIC names.

With this update, the setting net.ifnames=0 has been removed from grub-config in the overcloud image and the introspection data contains consistent NIC names.
Previously, the default values for dhcp_start and dhcp_end in the undercloud.conf file did not provide enough IP addresses to pass tripleo validation and the ctlplane-ip-range validation failed.

With this update, the IP range is larger and validation passes successfully.
Previously, routes on SR-IOV PF interfaces were not set properly and these routes were ignored.

With this update, routes for SR-IOV PF interfaces function correctly.

Name	Repository	Description of Requirement
Red Hat Enterprise Linux 8 for x86_64 - BaseOS (RPMs)	`rhel-8-for-x86_64-baseos-rpms`	Base operating system repository for x86_64 systems.
Red Hat Enterprise Linux 8 for x86_64 - AppStream (RPMs)	`rhel-8-for-x86_64-appstream-rpms`	Contains Red Hat OpenStack Platform dependencies.
Red Hat Enterprise Linux 8 for x86_64 - High Availability (RPMs)	`rhel-8-for-x86_64-highavailability-rpms`	High availability tools for Red Hat Enterprise Linux. Used for Controller node high availability.
Red Hat Ansible Engine 2.8 for RHEL 8 x86_64 (RPMs)	`ansible-2.8-for-rhel-8-x86_64-rpms`	Ansible Engine for Red Hat Enterprise Linux. Used to provide the latest version of Ansible.
Red Hat Satellite Tools for RHEL 8 Server RPMs x86_64	`satellite-tools-6.5-for-rhel-8-x86_64-rpms`	Tools for managing hosts with Red Hat Satellite 6.
Red Hat OpenStack Platform 15 for RHEL 8 (RPMs)	`openstack-15-for-rhel-8-x86_64-rpms`	Core Red Hat OpenStack Platform repository, which contains packages for Red Hat OpenStack Platform director.
Red Hat Fast Datapath for RHEL 8 (RPMS)	`fast-datapath-for-rhel-8-x86_64-rpms`	Provides Open vSwitch (OVS) packages for OpenStack Platform.

Name	Repository	Description of Requirement
Red Hat Enterprise Linux for IBM Power, little endian - BaseOS (RPMs)	`rhel-8-for-ppc64le-baseos-rpms`	Base operating system repository for ppc64le systems.
Red Hat Enterprise Linux 8 for IBM Power, little endian - AppStream (RPMs)	`rhel-8-for-ppc64le-appstream-rpms`	Contains Red Hat OpenStack Platform dependencies.
Red Hat Enterprise Linux 8 for IBM Power, little endian - High Availability (RPMs)	`rhel-8-for-ppc64le-highavailability-rpms`	High availability tools for Red Hat Enterprise Linux. Used for Controller node high availability.
Red Hat Ansible Engine 2.8 for RHEL 8 IBM Power, little endian (RPMs)	`ansible-2.8-for-rhel-8-ppc64le-rpms`	Ansible Engine for Red Hat Enterprise Linux. Used to provide the latest version of Ansible.
Red Hat OpenStack Platform 15 for RHEL 8 (RPMs)	`openstack-15-for-rhel-8-ppc64le-rpms`	Core Red Hat OpenStack Platform repository for ppc64le systems.

Name	Repository	Description of Requirement
Red Hat Enterprise Linux 8 for x86_64 - BaseOS (RPMs)	`rhel-8-for-x86_64-baseos-rpms`	Base operating system repository for x86_64 systems.
Red Hat Enterprise Linux 8 for x86_64 - AppStream (RPMs)	`rhel-8-for-x86_64-appstream-rpms`	Contains Red Hat OpenStack Platform dependencies.
Red Hat Enterprise Linux 8 for x86_64 - High Availability (RPMs)	`rhel-8-for-x86_64-highavailability-rpms`	High availability tools for Red Hat Enterprise Linux. Used for Controller node high availability.
Red Hat Ansible Engine 2.8 for RHEL 8 x86_64 (RPMs)	`ansible-2.8-for-rhel-8-x86_64-rpms`	Ansible Engine for Red Hat Enterprise Linux. Used to provide the latest version of Ansible.
Advanced Virtualization for RHEL 8 x86_64 (RPMs)	`advanced-virt-for-rhel-8-x86_64-rpms`	Provides virtualization packages for OpenStack Platform.
Red Hat Satellite Tools for RHEL 8 Server RPMs x86_64	`satellite-tools-6.5-for-rhel-8-x86_64-rpms`	Tools for managing hosts with Red Hat Satellite 6.
Red Hat OpenStack Platform 15 for RHEL 8 (RPMs)	`openstack-15-for-rhel-8-x86_64-rpms`	Core Red Hat OpenStack Platform repository.
Red Hat Fast Datapath for RHEL 8 (RPMS)	`fast-datapath-for-rhel-8-x86_64-rpms`	Provides Open vSwitch (OVS) packages for OpenStack Platform.

Name	Repository	Description of Requirement
Red Hat Enterprise Linux 8 for x86_64 - Real Time (RPMs)	`rhel-8-for-x86_64-rt-rpms`	Repository for Real Time KVM (RT-KVM). Contains packages to enable the real time kernel. This repository should be enabled for all Compute nodes targeted for RT-KVM. NOTE: You need a separate subscription to a `Red Hat OpenStack Platform for Real Time` SKU before you can access this repository.
Red Hat Enterprise Linux 8 for x86_64 - Real Time for NFV (RPMs)	`rhel-8-for-x86_64-nfv-rpms`	Repository for Real Time KVM (RT-KVM) for NFV. Contains packages to enable the real time kernel. This repository should be enabled for all NFV Compute nodes targeted for RT-KVM. NOTE: You need a separate subscription to a `Red Hat OpenStack Platform for Real Time` SKU before you can access this repository.

Name	Repository	Description of Requirement
Red Hat Enterprise Linux for IBM Power, little endian - BaseOS (RPMs)	`rhel-8-for-ppc64le-baseos-rpms`	Base operating system repository for ppc64le systems.
Red Hat Enterprise Linux 8 for IBM Power, little endian - AppStream (RPMs)	`rhel-8-for-ppc64le-appstream-rpms`	Contains Red Hat OpenStack Platform dependencies.
Red Hat Enterprise Linux 8 for IBM Power, little endian - High Availability (RPMs)	`rhel-8-for-ppc64le-highavailability-rpms`	High availability tools for Red Hat Enterprise Linux. Used for Controller node high availability.
Red Hat Ansible Engine 2.8 for RHEL 8 IBM Power, little endian (RPMs)	`ansible-2.8-for-rhel-8-ppc64le-rpms`	Ansible Engine for Red Hat Enterprise Linux. Used to provide the latest version of Ansible.
Red Hat OpenStack Platform 15 for RHEL 8 (RPMs)	`openstack-15-for-rhel-8-ppc64le-rpms`	Core Red Hat OpenStack Platform repository for ppc64le systems.

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Release Notes

Release details for Red Hat OpenStack Platform 15

OpenStack Documentation Team

Chapter 1. Introduction

1.1. About this Release

1.2. Requirements

1.3. Deployment Limits

1.4. Database Size Management

1.5. Certified Drivers and Plug-ins

1.6. Certified Guest Operating Systems

1.7. Product Certification Catalog

1.8. Bare Metal Provisioning Operating Systems

1.9. Hypervisor Support

1.10. Content Delivery Network (CDN) Repositories

1.10.1. Undercloud repositories

1.10.2. Overcloud repositories

1.11. Product Support

Chapter 2. Top New Features

2.1. Red Hat Enterprise Linux 8 Features that Affect Red Hat OpenStack Platform 15

2.2. Red Hat OpenStack Platform director

2.3. Compute

2.4. OpenStack Networking

2.5. Storage

2.6. Ceph Storage

2.7. Technology Previews

2.7.1. New Technology Previews

Chapter 3. Release Information

3.1. Red Hat OpenStack Platform 15 GA

3.1.1. Enhancements

3.1.2. Technology Preview

3.1.3. Release Notes

3.1.4. Known Issues

3.1.5. Deprecated Functionality

3.2. Red Hat OpenStack Platform 15 Maintenance Release - October 3, 2019

3.2.1. Enhancements

3.2.2. Technology Preview

3.2.3. Known Issues

3.3. Red Hat OpenStack Platform 15 Maintenance Release - March 4, 2020

3.3.1. Enhancements

3.3.2. Technology Preview

3.3.3. Known Issues

Chapter 4. Technical Notes

4.1. RHEA-2019:2811 — RedHat OpenStack Platform 15 general availability advisory

4.2. RHBA-2020:0643 — RedHat OpenStack Platform 15 maintenance release advisory

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