R8.0 Release Notes

ISO image

The pre-built ISO (Debian) for StarlingX Release 8.0 are located at the StarlingX mirror repo:


Source Code for StarlingX Release 8.0

The source code for StarlingX Release 8.0 is available on the r/stx.8.0 branch in the StarlingX repositories.


To deploy StarlingX Release 8.0, see Consuming StarlingX.

For detailed installation instructions, see StarlingX 8.0 Installation Guides.

New Features and Enhancements

The sections below provides a detailed list of new features and links to the associated user guides (if applicable).

Debian OS

StarlingX Release 8.0 (and onwards) will only support a Debian-based Solution; full StarlingX functionality is supported. StarlingX R8 release runs Debian Bullseye (11.3) with the 5.10 kernel version from the Yocto project.

Debian is a well-established Linux Distribution supported by a large and mature open-source community and used by hundreds of commercial organizations, including Google. StarlingX has full functional equivalence to the earlier CentOS-based versions of StarlingX. From StarlingX Release 8.0 Debian OS is the only supported OS in StarlingX.

Major features of Debian-based StarlingX 8.0 include:

StarlingX leverages its existing relationships with the Yocto Project to enhance development, bug fixes and other activities in the Yocto Project kernel to drive StarlingX quality and feature content.

  • Debian Bullseye (11.3)

    Debian is a well-established Linux Distribution supported by a large and mature open-source community.

  • OSTree ( https://ostree.readthedocs.io/en/stable/manual/introduction/ )

    OSTree provides for robust and efficient versioning, packaging and upgrading of Linux-based systems.

  • An updated Installer to seamlessly adapt to Debian and OSTree

  • Updated software patching and upgrades for Debian and OSTree.

Operational Impacts of Debian

The operational impacts of Debian-based StarlingX are:

  • Functional equivalence with CentOS-based StarlingX

  • Use of the StarlingX CLIs and APIs will remain the same:

    • StarlingX on Debian will provide the same CLIs and APIs as StarlingX on CentOS.

    • StarlingX on Debian will run on a 5.10 based kernel.

    • StarlingX on Debian will support the same set of Kubernetes APIs used in StarlingX on CentOS.

    • The procedure to install hosts will be unchanged by the migration from CentOS to Debian. Only the grub menu has been modified.

    • The CLIs used for software updates (patching) will be unchanged by the migration from CentOS to Debian.

  • User applications running in containers on CentOS should run on Debian without modification. Re-validation of containers on Debian is encouraged to identify any exceptions.

  • A small subset of operating system-specific commands will differ. Some of these changes result from the switch in distributions while others are generic changes that have accumulated since the release of the CentOS distribution currently used. For example:

    • The Debian installation requires new pxeboot grub menus. See PXE Boot Controller-0.

    • Some prompt strings will be slightly different (for example: ssh login, passwd command, and others).

    • Many 3rd-party software packages are running a newer version in Debian and this may lead to minor changes in syntax, output, config files, and logs.

    • The URL to expose keystone service does not have the version appended.

    • On Debian, interface and static routes need to be handled using system-API (host-route-*, host-if-* and host-addr-*).

      • Do not edit configuration files in /etc/network/ as they are regenerated from sysinv database after a system reboot. Any changes directly done there will be lost.

      • The static routes configuration file is /etc/network/routes

      • Interface configuration files are located in /etc/network/interfaces.d/

    • Debian stores network information in /etc/network instead of /etc/sysconfig/network-scripts location used in CentOS. However, the StarlingX system commands are unchanged.

    • Patching on Debian is done using ostree commits rather than individual RPMs.

      You can see which packages are updated by ostree using the dpkg -l instead of rpm -qa used on CentOS.

    • The patching CLI commands and Horizon interactions are the same as for CentOS.

      • The supported patching CLI commands for release 8.0 are:

        • sw-patch upload

        • sw-patch upload-dir

        • sw-patch apply

        • sw-patch remove

        • sw-patch delete

Change in Login for Systems installed from Prestaged ISO

In StarlingX Systems installed using prestaging ISO has a sysadmin account, and the default initial password is sysadmin (default login / password combination is sysadmin/sysadmin). The initial password must be changed immediately after logging in to the host for the first time. Follow the steps below:

  1. login: sysadmin

  2. password: sysadmin

  3. Current password: sysadmin

  4. New Password:

  5. Re-enter New Password:

CVSS v3 Adoption

StarlingX is now using CVSS v3 instead of CVSS v2 as a fix criteria to evaluate CVEs that need to be fixed.

On a monthly basis, the StarlingX is scanned for CVE’s and the reports that are generated are reviewed by the Security team.

See: CVE Maintenance for details.

Single Physical Core for Platform Function in All-In-One Deployments

The platform core usage is optimized to operate on a single physical core (with two logical cores with Hyper-Threading enabled) for AIO deployments.


The use of single physical core for platform function is only suitable for Intel® 4th Generation Xeon® Scalable Processors or above and should not be configured for previous Intel® Xeon® CPU families. For All-In-One systems with older generation processors, two physical cores (or more) must be configured.


AIO memory reserved for the platform has increased

The amount of memory reserved for the platform for StarlingX Release 8.0 on an AIO controller has increased to 11 GB for hosts with 2 numa nodes.

Resizing platform-backup partition during install

During Installation: If a platform-backup partition exists, it will no longer be wiped in normal installation operations. The platform-backup partition can be resized during the install; although it can only be increased in size, not reduced in size.


Attempts to install using a smaller partition size than the existing partition will result in installation failures.

During Installation and Provisioning of a Subcloud: For subcloud install operations, the persistent-size install value in the subcloud install-values.yaml file used during subcloud installation, controls platform-backup partition sizing. Since the platform-backup partition is non-destructive, this value can only be increased from previous installs. In this case, the partition size is extended and the filesystem is resized.


Any “persistent-size” values smaller than the existing partition will cause installation failures, with the partition remaining in place.

Recommended: For new installations where a complete reinstall is being performed it may be preferable to wipe the disks before the fresh install.

Optimized Backup and Restore


The backup in earlier StarlingX releases are not compatible with the Optimized Restore functionality introduced in StarlingX Release 8.0.

Backup from one release to another release is not supported, except for an AIO-SX upgrade.

Optimized Backup

The extra var backup_registry_filesystem can now be used to backup users images in the registry backup (mainly for backup for reinstall usage scenario).

Optimized Restore

The new optimized restore method will support restore with registry backup only. It will obtain from the prestaged images the required platform images. If no prestaged images are available, it would need to resort to pulling from the registry.

See: AIO-SX - Restore on new hardware for details.

Enhancements for Generic Error Tolerance in Redfish Virtual Media

Redfish virtual media operations have been observed to fail with transient errors. While the conditions for those failures are not always known (network, BMC timeouts, etc), it has been observed that if the Subcloud install operation is retried, the operation is successful.

To alleviate the transient conditions, the robustness of the Redfish media operations are improved by introducing automatic retries.

Centralized Subcloud Backup and Restore

The StarlingX Backup and Restore feature allows for essential system data (and optionally some additional information, such as container registry images, and OpenStack application data) to be backed up, so that it can be used to restore the platform to a previously working state.

The user may backup system data, or restore previously backed up data into it, by running a set of ansible playbooks. They may be run either locally within the system, or from a remote location. The backups are saved as a set of compressed files, which can then be used to restore the system to the same state as it was when backed up.

The subcloud’s system backup data can either be stored locally on the subcloud or on the System Controller. The subcloud’s container image backup (from registry.local) can only be stored locally on the subcloud to avoid overloading the central storage and the network with large amount of data transfer.


Improved Subcloud Deployment / Upgrading Error Reporting

In StarlingX Release 8.0 provides enhanced support for subcloud deployments and upgrading error reporting.

Key error messages from subcloud deployment or upgrade failures can now be accessed via RESTAPIs, the CLI or the GUI (Horizon).

Full logs for subcloud deployments and upgrades are still accessible by using SSH to the System Controller; however, this should no longer be required in most error scenarios.

See: Distributed Cloud Guide for details.

Kubernetes Pod Coredump Handler

A new Kubernetes aware core dump handler has been added in StarlingX Release 8.0.

Individual pods can control the core dump handling by specifying Kubernetes Pod annotations that will instruct the core dump handler for specific applications.

See: Kubernetes Pod Core Dump Handler for details.

Enhancements for Subcloud Rehoming without controller reboot

StarlingX Release 8.0 supports rehoming a subcloud to a new system controller without requiring a lock and unlock of the subcloud controller(s).

When the System Controller needs to be reinstalled, or when the subclouds from multiple System Controllers are being consolidated into a single System Controller, you can rehome an already deployed subcloud to a different System Controller.

See: Rehome a Subcloud for details.


The KubeVirt system application in StarlingX includes; KubeVirt, Containerized Data Importer (CDI) and the Virtctl client tool.

KubeVirt is an open source project that allows VMs to be run and managed as pods inside a Kubernetes cluster. This is a particularly important innovation as traditional VM workloads can be moved into Kubernetes alongside already containerized workloads, thereby taking advantage of Kubernetes as an orchestration engine.

The CDI is an open source project that provides facilities for enabling PVCs to be used as disks for KubeVirt VMs by way of DataVolumes.

The Virtctl client tool is an open source tool distributed with KubeVirt and required to use advanced features such as serialand graphical console access. It also provides convenience commands for starting/stopping VMs, live migrating VMs, cancelling live migrations and uploading VM disk images.


Limited testing of KubeVirt on StarlingX has been performed, along with some simple examples on creating a Linux VM and a Windows VM. In future releases, high performance capabilities of KubeVirt will be validated on StarlingX.


Support for Intel Wireless FEC Accelerators using SR-IOV FEC operator

The SR-IOV FEC Operator for Intel Wireless FEC Accelerators supports the following vRAN FEC accelerators:

  • Intel® vRAN Dedicated Accelerator ACC100.

  • Intel® FPGA Programmable Acceleration Card N3000.

  • Intel® vRAN Dedicated Accelerator ACC200.

You can enable and configure detailed FEC parameters for an ACC100/ACC200 eASIC card so that it can be used as a hardware accelerator by hosted vRAN containerized workloads on StarlingX.


Multiple Driver Version Support

StarlingX supports multiple driver versions for the ice, i40e, and iavf drivers.

See: Intel Multi-driver Version for details.

Intel 4th Generation Intel(R) Xeon(R) Scalable Processor Kernel Feature Support (5G ISA)

Introduction of the 5G ISA (Instruction Set Architecture) will facilitate an acceleration for vRAN workloads to improve performance and capacity for RAN solutions specifically compiled for the 4th Generation Intel(R) Xeon(R) Scalable Processor target with the 5G instruction set (AVX512-FP16) enabled.

vRAN Intel Tools Container

StarlingX Release 8.0 supports OpenSource vRAN tools that are being delivered in the docker.io/starlingx/stx-debian-tools-dev:stx.8.0-v1.0.3 container.

See: vRAN Tools for details.

Quartzville iqvlinux driver support

This OpenSource Quartzville driver is included in StarlingX in support of a user building a container with the Quartzville tools from Intel, using docker.io/starlingx/stx-debian-tools-dev:stx.8.0-v1.0.3 as a base container, as described in vRAN Tools .

See: vRAN Tools for details.

Pod Security Admission Controller

The PSA Controller is the PSP replacement which is supported in Kubernetes v1.24 in StarlingX Release 8.0. It replaces the deprecated PSP; PSP will be REMOVED in StarlingX Release 9.0 with Kubernetes v1.25.

The PSA controller acts on creation and modification of the pod and determines if it should be admitted based on the requested security context and the policies defined by Pod Security Standards. It provides a more usable k8s-native solution to enforce Pod Security Standards.


StarlingX users should migrate their security policy configurations from PSP to PSA in StarlingX Release 8.0 .


SSH integration with remote Windows Active Directory

By default, SSH to StarlingX hosts supports authentication using the ‘sysadmin’ Local Linux Account and StarlingX Local LDAP Linux User Accounts. SSH can also be optionally configured to support authentication with one or more remote LDAP identity providers (such as Windows Active Directory (WAD)). Internally, SSH uses SSSD service to provide NSS and PAM interfaces and a backend system able to remotely connect to multiple different LDAP domains.

SSSD provides a secure solution by using data encryption for LDAP user authentication. SSSD supports authentication only over an encrypted channel.

See: SSH User Authentication using Windows Active Directory (WAD) for details.

Keystone Account Roles

reader role support has been added for StarlingX commands: system, fm, swmanager and dcmanager.


  • admin role in the admin projet can execute any action in the system

  • reader role in the admin project has access to only read-only type commands; i.e. list, query, show, summary type commands

  • member role is currently equivalent to reader role; this may change in the future.

See: Keystone Account Roles for details.

O-RAN O2 Compliance

In the context of hosting a RAN Application on StarlingX, the O-RAN O2 Application provides and exposes the IMS and DMS service APIs of the O2 interface between the O-Cloud (StarlingX) and the Service Management and Orchestration (SMO), in the O-RAN Architecture.

The O2 interfaces enable the management of the O-Cloud (StarlingX) infrastructure and the deployment life-cycle management of O-RAN cloudified NFs that run on O-Cloud (StarlingX). See O-RAN O2 General Aspects and Principles 2.0, and INF O2 documentation.

The O-RAN O2 application is integrated into StarlingX as a system application. The O-RAN O2 application package is saved in StarlingX during system installation, but it is not applied by default.


StarlingX Release 8.0 O2 IMS and O2 DMS with Kubernetes profiles are compliant with the October 2022 version of the O-RAN standards.

See: O-RAN O2 Application for details.

O-RAN Spec Compliant Timing API Notification

StarlingX provides ptp-notification to support applications that rely on PTP for time synchronization and require the ability to determine if the system time is out of sync. ptp-notification provides the ability for user applications to query the sync state of hosts as well as subscribe to push notifications for changes in the sync status.

PTP-notification consists of two main components:

  • The ptp-notification system application can be installed on nodes using PTP clock synchronization. This monitors the various time services and provides the v1 and v2 REST API for clients to query and subscribe to.

  • The ptp-notification sidecar. This is a container image which can be configured as a sidecar and deployed alongside user applications that wish to use the ptp-notification API. User applications only need to be aware of the sidecar, making queries and subscriptions via its API. The sidecar handles locating the appropriate ptp-notification endpoints, executing the query and returning the results to the user application.

See: PTP Notifications Overview for details.

Hardware Updates

The following hardware is now supported in StarlingX 8.0:

4th Generation Intel® Xeon® Scalable Processor with and without built-in accelerator.


Bug status

Fixed bugs

This release provides fixes for a number of defects. Refer to the StarlingX bug database to review the R8.0 Fixed Bugs.

Known Limitations and Workarounds

The following are known limitations you may encounter with your StarlingX Release 8.0 and earlier releases. Workarounds are suggested where applicable.


These limitations are considered temporary and will likely be resolved in a future release.

Subcloud Upgrade with Kubernetes Versions

Subcloud Kubernetes versions are upgraded along with the System Controller. You can add a new subcloud while the System Controller is on intermediate versions of Kubernetes as long as the needed k8s images are available at the configured sources.

Workaround: In a Distributed Cloud configuration, when upgrading from StarlingX Release 7.0 the Kubernetes version is v1.23.1. The default version of the new install for Kubernetes is v1.24.4. Kubernetes must be upgraded one version at a time on the System Controller.


New subclouds should not be added until the System Controller has been upgraded to Kubernetes v1.24.4.

AIO-SX Restore Fails during puppet-manifest-apply.sh

Restore fails using a backup file created after a fresh install.

Workaround: During the restore process, after reinstalling the controllers, the OAM interface must be configured with the same IP address protocol version used during installation.

Subcloud Controller-0 is in a degraded state after upgrade and host unlock

During an upgrade orchestration of the subcloud from StarlingX Release 7.0 to StarlingX Release 8.0, and after host unlock, the subcloud is in a degraded state, and alarm 200.004 is raised, displaying “controller-0 experienced a service-affecting failure. Auto-recovery in progress”.

Workaround: You can recover the subcloud to the available state by locking and unlocking controller-0 .

Limitations when using Multiple Driver Versions for the same NIC Family

The capability to support multiple NIC driver versions has the following limitations:

  • Intel NIC family supports only: ice, i40e and iavf drivers

  • Driver versions must respect the compatibility matrix between drivers

  • Multiple driver versions cannot be loaded simultaneously and applies to the entire system.

  • Latest driver version will be loaded by default, unless specifically configured to use a legacy driver version.

  • Drivers used by the installer will always use the latest version, therefore firmware compatibility must support basic NIC operations for each version to facilitate installation

  • Host reboot is required to activate the configured driver versions

  • For Backup and Restore, the host must be rebooted a second time for in order to activate the drivers versions.

Workaround: NA

Quartzville Tools

The following celo64e and nvmupdate64e commands are not supported in StarlingX, Release 8.0 due to a known issue in Quartzville tools that crashes the host.

Workaround: Reboot the host using the boot screen menu.

Controller SWACT unavailable after System Restore

After performing a restore of the system, the user is unable to swact the controller.

Workaround: NA

Intermittent Kubernetes Upgrade failure due to missing Images

During a Kubernetes upgrade, the upgrade may intermittently fail when you run system kube-host-upgrade <host> control-plane due to the containerd cache being cleared.

Workaround: If the above failure is encountered, run the following commands on the host encountering the failure:


  1. Ensure the failure is due to missing images by running crictl images and confirming the following are not present:

  2. Manually pull the image into containerd cache by running the following commands, replacing <admin_password> with your password for the admin user.

    ~(keystone_admin)]$ crictl pull --creds admin:<admin_password> registry.local:9001/k8s.gcr.io/kube-apiserver:v1.24.4
    ~(keystone_admin)]$ crictl pull --creds admin:<admin_password> registry.local:9001/k8s.gcr.io/kube-controller-manager:v1.24.4
    ~(keystone_admin)]$ crictl pull --creds admin:<admin_password> registry.local:9001/k8s.gcr.io/kube-scheduler:v1.24.4
    ~(keystone_admin)]$ crictl pull --creds admin:<admin_password> registry.local:9001/k8s.gcr.io/kube-proxy:v1.24.4
  3. Ensure the images are present when running crictl images. Rerun the system kube-host-upgrade <host> control-plane` command.

Docker Network Bridge Not Supported

The Docker Network Bridge, previously created by default, is removed and no longer supported in StarlingX Release 8.0 as the default bridge IP address collides with addresses already in use.

As a result, docker can no longer be used for running containers. This impacts building docker images directly on the host.

Workaround: Create a Kubernetes pod that has network access, log in to the container, and build the docker images.

Impact of Kubenetes Upgrade to v1.24

In Kubernetes v1.24 support for the RemoveSelfLink feature gate was removed. In previous releases of StarlingX this has been set to “false” for backward compatibility, but this is no longer an option and it is now hardcoded to “true”.

Workaround: Any application that relies on this feature gate being disabled (i.e. assumes the existance of the “self link”) must be updated before upgrading to Kubernetes v1.24.

Password Expiry Warning Message is not shown for LDAP user on login

In StarlingX Release 8.0, the password expiry warning message is not shown for LDAP users on login when the password is nearing expiry. This is due to the pam-sssd integration.

Workaround: It is highly recommend that LDAP users maintain independent notifications and update their passwords every 3 months.

The expired password can be reset by a user with root privileges using the following command:

Console Session Issues during Installation

After bootstrap and before unlocking the controller, if the console session times out (or the user logs out), systemd does not work properly. fm, sysinv and mtcAgent do not initialize.

Workaround: If the console times out or the user logs out between bootstrap and unlock of controller-0, then, to recover from this issue, you must re-install the ISO.

PTP O-RAN Spec Compliant Timing API Notification

  • The ptp-notification <minor_version>.tgz application tarball and the corresponding notificationservice-base:stx8.0-v2.0.2 image are not backwards compatible with applications using the v1 ptp-notification API and the corresponding notificationclient-base:stx.8.0-v2.0.2 image.

    Backward compatibility will be provided in StarlingX Release 9.0.


    For O-RAN Notification support (v2 API), deploy and use the ptp-notification-<minor_version>.tgz application tarball. Instructions for this can be found in the StarlingX Release 8.0 documentation.


  • The v1 API only supports monitoring a single ptp4l + phc2sys instance.

    Workaround: Ensure the system is not configured with multiple instances when using the v1 API.

  • The O-RAN Cloud Notification defines a /././sync API v2 endpoint intended to allow a client to subscribe to all notifications from a node. This endpoint is not supported StarlingX Release 8.0.

    Workaround: A specific subscription for each resource type must be created instead.

  • v1 / v2

    • v1: Support for monitoring a single ptp4l instance per host - no other services can be queried/subscribed to.

    • v2: The API conforms to O-RAN.WG6.O-Cloud Notification API-v02.01 with the following exceptions, that are not supported in StarlingX Release 8.0.

      • O-RAN SyncE Lock-Status-Extended notifications

      • O-RAN SyncE Clock Quality Change notifications

      • O-RAN Custom cluster names

      • /././sync endpoint

    Workaround: See the respective PTP-notification v1 and v2 document subsections for further details.

    v1: https://docs.starlingx.io/api-ref/ptp-notification-armada-app/api_ptp_notifications_definition_v1.html

    v2: https://docs.starlingx.io/api-ref/ptp-notification-armada-app/api_ptp_notifications_definition_v2.html

Upper case characters in host names cause issues with kubernetes labelling

Upper case characters in host names cause issues with kubernetes labelling.

Workaround: Host names should be lower case.

Debian Bootstrap

On CentOS bootstrap worked even if dns_servers were not present in the localhost.yml. This does not work for Debian bootstrap.

Workaround: You need to configure the dns_servers parameter in the localhost.yml, as long as no FQDNs were used in the bootstrap overrides in the localhost.yml file for Debian bootstrap.

Installing a Debian ISO

The disks and disk partitions need to be wiped before the install. Installing a Debian ISO may fail with a message that the system is in emergency mode if the disks and disk partitions are not completely wiped before the install, especially if the server was previously running a CentOS ISO.

Workaround: When installing a lab for any Debian install, the disks must first be completely wiped using the following procedure before starting an install.

Use the following wipedisk commands to run before any Debian install for each disk (eg: sda, sdb, etc):

sudo wipedisk
# Show
sudo sgdisk -p /dev/sda
# Clear part table
sudo sgdisk -o /dev/sda


The above commands must be run before any Debian install. The above commands must also be run if the same lab is used for CentOS installs after the lab was previously running a Debian ISO.

Security Audit Logging for K8s API

A custom policy file can only be created at bootstrap in apiserver_extra_volumes. If a custom policy file was configured at bootstrap, then after bootstrap the user has the option to configure the parameter audit-policy-file to either this custom policy file (/etc/kubernetes/my-audit-policy-file.yml) or the default policy file /etc/kubernetes/default-audit-policy.yaml. If no custom policy file was configured at bootstrap, then the user can only configure the parameter audit-policy-file to the default policy file.

Only the parameter audit-policy-file is configurable after bootstrap, so the other parameters (audit-log-path, audit-log-maxsize, audit-log-maxage and audit-log-maxbackup) cannot be changed at runtime.

Workaround: NA

See: Kubernetes Operator Command Logging.

Installing subcloud with patches in Partial-Apply is not supported

When a patch has been uploaded and applied, but not installed, it is in a Partial-Apply state. If a remote subcloud is installed via Redfish (miniboot) at this point, it will run the patched software. Any patches in this state will be applied on the subcloud as it is installed. However, this is not reflected in the output from the sw-patch query command on the subcloud.

Workaround: For remote subcloud install operations using the Redfish protocol, you should avoid installing any subclouds if there are System Controller patches in the Partial-Apply state.

PTP is not supported on Broadcom 57504 NIC

PTP is not supported on the Broadcom 57504 NIC.

Workaround: None. Do not configure PTP instances on the Broadcom 57504 NIC.

Metrics Server Update across Upgrades

After a platform upgrade, the Metrics Server will NOT be automatically updated.

Workaround: To update the Metrics Server, See: Install Metrics Server

Horizon Drop-Down lists in Chrome and Firefox causes issues due to the new branding

Drop-down menus in Horizon do not work due to the ‘select’ HTML element on Chrome and Firefox.

It is considered a ‘replaced element’ as it is generated by the browser and/or operating system. This element has a limited range of customizable CSS properties.

Workaround: The system should be 100% usable even with this limitation. Changing browser’s and/or operating system’s theme could solve display issues in case they limit the legibility of the elements (i.e. white text and white background).

Deploying an App using nginx controller fails with internal error after controller.name override

An Helm override of controller.name to the nginx-ingress-controller app may result in errors when creating ingress resources later on.

Example of Helm override:

Workaround: NA

Kata Container is not supported on StarlingX 8.0

Kata Containers that were supported on CentOS in earlier releases of StarlingX will not be supported on StarlingX Release 8.0.

Vault is not supported on StarlingX Release 8.0

The Vault application is not supported on StarlingX Release 8.0.

Workaround: NA

Portieris is not supported on StarlingX Release 8.0

The Portieris application is not supported on StarlingX Release 8.0.

Workaround: NA

DCManager Patch Orchestration


Patches must be applied or removed on the System Controller prior to using the dcmanager patch-strategy command to propagate changes to the subclouds.

Optimization with a Large number of OSDs

As Storage nodes are not optimized, you may need to optimize your Ceph configuration for balanced operation across deployments with a high number of OSDs. This results in an alarm being generated even if the installation succeeds.

800.001 - Storage Alarm Condition: HEALTH_WARN. Please check ‘ceph -s’

Workaround: To optimize your storage nodes with a large number of OSDs, it is recommended to use the following commands:

$ ceph osd pool set kube-rbd pg_num 256
$ ceph osd pool set kube-rbd pgp_num 256

PTP tx_timestamp_timeout causes ptp4l port to transition to FAULTY

NICs using the Intel Ice NIC driver may report the following in the ptp4l` logs, which might coincide with a PTP port switching to FAULTY before re-initializing.

ptp4l[80330.489]: timed out while polling for tx timestamp
ptp4l[80330.CGTS-30543489]: increasing tx_timestamp_timeout may correct this issue, but it is likely caused by a driver bug

This is due to a limitation of the Intel ICE driver.

Workaround: The recommended workaround is to set the tx_timestamp_timeout parameter to 700 (ms) in the ptp4l config using the following command.

~(keystone_admin)]$ system ptp-instance-parameter-add ptp-inst1 tx_timestamp_timeout=700

BPF is disabled

BPF cannot be used in the PREEMPT_RT/low latency kernel, due to the inherent incompatibility between PREEMPT_RT and BPF, see, https://lwn.net/Articles/802884/.

Some packages might be affected when PREEMPT_RT and BPF are used together. This includes the following, but not limited to these packages.

  • libpcap

  • libnet

  • dnsmasq

  • qemu

  • nmap-ncat

  • libv4l

  • elfutils

  • iptables

  • tcpdump

  • iproute

  • gdb

  • valgrind

  • kubernetes

  • cni

  • strace

  • mariadb

  • libvirt

  • dpdk

  • libteam

  • libseccomp

  • binutils

  • libbpf

  • dhcp

  • lldpd

  • containernetworking-plugins

  • golang

  • i40e

  • ice

Workaround: Wind River recommends not to use BPF with real time kernel. If required it can still be used, for example, debugging only.

crashkernel Value

crashkernel=auto is no longer supported by newer kernels, and hence the v5.10 kernel will not support the “auto” value.

Workaround: StarlingX uses crashkernel=2048m instead of crashkernel=auto.


StarlingX Release 8.0 has increased the amount of reserved memory for the crash/kdump kernel from 512 MiB to 2048 MiB.

Control Group parameter

The control group (cgroup) parameter kmem.limit_in_bytes has been deprecated, and results in the following message in the kernel’s log buffer (dmesg) during boot-up and/or during the Ansible bootstrap procedure: “kmem.limit_in_bytes is deprecated and will be removed. Please report your use case to linux-mm@kvack.org if you depend on this functionality.” This parameter is used by a number of software packages in StarlingX, including, but not limited to, systemd, docker, containerd, libvirt etc.

Workaround: NA. This is only a warning message about the future deprecation of an interface.

Kubernetes Taint on Controllers for Standard Systems

In Standard systems, a Kubernetes taint is applied to controller nodes in order to prevent application pods from being scheduled on those nodes; since controllers in Standard systems are intended ONLY for platform services. If application pods MUST run on controllers, a Kubernetes toleration of the taint can be specified in the application’s pod specifications.

Workaround: Customer applications that need to run on controllers on Standard systems will need to be enabled/configured for Kubernetes toleration in order to ensure the applications continue working after an upgrade from StarlingX Release 6.0 to StarlingX future Releases. It is suggested to add the Kubernetes toleration to your application prior to upgrading to StarlingX Release 8.0.

You can specify toleration for a pod through the pod specification (PodSpec). For example:

        - key: "node-role.kubernetes.io/control-plane"
        operator: "Exists"
        effect: "NoSchedule"
        - key: "node-role.kubernetes.io/control-plane"
        operator: "Exists"
        effect: "NoSchedule"

See: Taints and Tolerations.

New Kubernetes Taint on Controllers for Standard Systems

A new Kubernetes taint will be applied to controllers for Standard systems in order to prevent application pods from being scheduled on controllers; since controllers in Standard systems are intended ONLY for platform services. If application pods MUST run on controllers, a Kubernetes toleration of the taint can be specified in the application’s pod specifications. You will also need to change the nodeSelector / nodeAffinity to use the new label.

Workaround: Customer applications that need to run on controllers on Standard systems will need to be enabled/configured for Kubernetes toleration in order to ensure the applications continue working after an upgrade to StarlingX Release 8.0 and StarlingX future Releases.

You can specify toleration for a pod through the pod specification (PodSpec). For example:

        - key: "node-role.kubernetes.io/control-plane"
        operator: "Exists"
        effect: "NoSchedule"

See: Taints and Tolerations.

Ceph alarm 800.001 interrupts the AIO-DX upgrade orchestration

Upgrade orchestration fails on AIO-DX systems that have Ceph enabled.

Workaround: Clear the Ceph alarm 800.001 by manually upgrading both controllers and using the following command:

~(keystone_admin)]$ ceph mon enable-msgr2

Ceph alarm 800.001 is cleared.

Storage Nodes are not considered part of the Kubernetes cluster

When running the system kube-host-upgrade-list command the output must only display controller and worker hosts that have control-plane and kubelet components. Storage nodes do not have any of those components and so are not considered a part of the Kubernetes cluster.

Workaround: Do not include Storage nodes.

Backup and Restore of ACC100 (Mount Bryce) configuration requires double unlock attempt

After restoring from a previous backup with an Intel ACC100 processing accelerator device, the first unlock attempt will be refused since this specific kind of device will be updated in the same context.

Workaround: A second attempt after few minutes will accept and unlock the host.

Application Pods with SRIOV Interfaces

Application Pods with SR-IOV Interfaces require a restart-on-reboot: “true” label in their pod spec template.

Pods with SR-IOV interfaces may fail to start after a platform restore or Simplex upgrade and persist in the Container Creating state due to missing PCI address information in the CNI configuration.

Workaround: Application pods that require|SRIOV| should add the label restart-on-reboot: “true” to their pod spec template metadata. All pods with this label will be deleted and recreated after system initialization, therefore all pods must be restartable and managed by a Kubernetes controller (i.e. DaemonSet, Deployment or StatefulSet) for auto recovery.

Pod Spec template example:

        tier: node
        app: sriovdp
        restart-on-reboot: "true"

Management VLAN Failure

If the Management VLAN fails on the active System Controller, communication failure 400.005 is detected, and alarm 280.001 is raised indicating subclouds are offline.

Workaround: System Controller will recover and subclouds are manageable when the Management VLAN is restored.

Host Unlock During Orchestration

If a host unlock during orchestration takes longer than 30 minutes to complete, a second reboot may occur. This is due to the delays, VIM tries to abort. The abort operation triggers the second reboot.

Workaround: NA

Storage Nodes Recovery on Power Outage

Storage nodes take 10-15 minutes longer to recover in the event of a full power outage.

Workaround: NA

Ceph OSD Recovery on an AIO-DX System

In certain instances a Ceph OSD may not recover on an AIO-DX system (for example, if an OSD comes up after a controller reboot and a swact occurs), and remains in the down state when viewed using the ceph -s command.

Workaround: Manual recovery of the OSD may be required.

Using Helm with Container-Backed Remote CLIs and Clients

If Helm is used within Container-backed Remote CLIs and Clients:

  • You will NOT see any helm installs from StarlingX Platform’s system Armada applications.

    Workaround: Do not directly use Helm to manage StarlingX Platform’s system Armada applications. Manage these applications using system application commands.

  • You will NOT see any helm installs from end user applications, installed using Helm on the controller’s local CLI.

    Workaround: It is recommended that you manage your Helm applications only remotely; the controller’s local CLI should only be used for management of the StarlingX Platform infrastructure.

Remote CLI Containers Limitation for StarlingX Platform HTTPS Systems

The python2 SSL lib has limitations with reference to how certificates are validated. If you are using Remote CLI containers, due to a limitation in the python2 SSL certificate validation, the certificate used for the ‘ssl’ certificate should either have:

  1. CN=IPADDRESS and SAN=empty or,


Workaround: Use CN=FQDN and SAN=FQDN as CN is a deprecated field in the certificate.

Cert-manager does not work with uppercase letters in IPv6 addresses

Cert-manager does not work with uppercase letters in IPv6 addresses.

Workaround: Replace the uppercase letters in IPv6 addresses with lowercase letters.

apiVersion: cert-manager.io/v1
kind: Certificate
    name: oidc-auth-apps-certificate
    namespace: test
    secretName: oidc-auth-apps-certificate
    - ahost.com
    - fe80::903a:1c1a:e802::11e4
        name: cloudplatform-interca-issuer
        kind: Issuer

Kubernetes Root CA Certificates

Kubernetes does not properly support k8s_root_ca_cert and k8s_root_ca_key being an Intermediate CA.

Workaround: Accept internally generated k8s_root_ca_cert/key or customize only with a Root CA certificate and key.

Windows Active Directory

  • Limitation: The Kubernetes API does not support uppercase IPv6 addresses.

    Workaround: The issuer_url IPv6 address must be specified as lowercase.

  • Limitation: The refresh token does not work.

    Workaround: If the token expires, manually replace the ID token. For more information, see, Obtain the Authentication Token Using the Browser.

  • Limitation: TLS error logs are reported in the oidc-dex container on subclouds. These logs should not have any system impact.

    Workaround: NA

  • Limitation: stx-oidc-client liveness probe sometimes reports failures. These errors may not have system impact.

    Workaround: NA

BMC Password

The BMC password cannot be updated.

Workaround: In order to update the BMC password, de-provision the BMC, and then re-provision it again with the new password.

Application Fails After Host Lock/Unlock

In some situations, application may fail to apply after host lock/unlock due to previously evicted pods.

Workaround: Use the kubectl delete command to delete the evicted pods and reapply the application.

Application Apply Failure if Host Reset

If an application apply is in progress and a host is reset it will likely fail. A re-apply attempt may be required once the host recovers and the system is stable.

Workaround: Once the host recovers and the system is stable, a re-apply may be required.

Pod Recovery after a Host Reboot

On occasions some pods may remain in an unknown state after a host is rebooted.

Workaround: To recover these pods kill the pod. Also based on https://github.com/kubernetes/kubernetes/issues/68211 it is recommended that applications avoid using a subPath volume configuration.

Rare Node Not Ready Scenario

In rare cases, an instantaneous loss of communication with the active kube-apiserver may result in kubernetes reporting node(s) as stuck in the “Not Ready” state after communication has recovered and the node is otherwise healthy.

Workaround: A restart of the kublet process on the affected node(s) will resolve the issue.

Platform CPU Usage Alarms

Alarms may occur indicating platform cpu usage is >90% if a large number of pods are configured using liveness probes that run every second.

Workaround: To mitigate either reduce the frequency for the liveness probes or increase the number of platform cores.

Pods Using isolcpus

The isolcpus feature currently does not support allocation of thread siblings for cpu requests (i.e. physical thread +HT sibling).

Workaround: NA

system host-disk-wipe command

The system host-disk-wipe command is not supported in this release.

Workaround: NA

Restrictions on the Size of Persistent Volume Claims (PVCs)

There is a limitation on the size of Persistent Volume Claims (PVCs) that can be used for all StarlingX Platform Releases.

Workaround: It is recommended that all PVCs should be a minimum size of 1GB. For more information, see, https://bugs.launchpad.net/starlingx/+bug/1814595.

Sub-Numa Cluster Configuration not Supported on Skylake Servers

Sub-Numa cluster configuration is not supported on Skylake servers.

Workaround: For servers with Skylake Gold or Platinum CPUs, Sub-NUMA clustering must be disabled in the BIOS.

The ptp-notification-demo App is Not a System-Managed Application

The ptp-notification-demo app is provided for demonstration purposes only. Therefore, it is not supported on typical platform operations such as Backup and Restore.

Workaround: NA

Deleting image tags in registry.local may delete tags under the same name

When deleting image tags in the registry.local docker registry, you should be aware that the deletion of an <image-name:tag-name> will delete all tags under the specified <image-name> that have the same ‘digest’ as the specified <image-name:tag-name>. For more information, see, Delete Image Tags in the Docker Registry.

Workaround: NA

Deprecated Notices

Airship Armada is deprecated


Airship Armada will be removed in stx.9.0.

StarlingX Release 7.0 introduces FluxCD based applications that utilize FluxCD Helm/source controller pods deployed in the flux-helm Kubernetes namespace. Airship Armada support is now considered to be deprecated. The Armada pod will continue to be deployed for use with any existing Armada based applications but will be removed in StarlingX Release 8.0, once the stx-openstack Armada application is fully migrated to FluxCD.

Cert-manager API Version deprecation

The upgrade of cert-manager from 0.15.0 to 1.7.1, deprecated support for cert manager API versions cert-manager.io/v1alpha2 and cert-manager.io/v1alpha3. When creating cert-manager CRDs (certificates, issuers, etc) with StarlingX Release 8.0, use cert-manager.io/v1.

Kubernetes APIs

Kubernetes APIs that will be removed in K8s 1.25 are listed below:

See: https://kubernetes.io/docs/reference/using-api/deprecation-guide/#v1-25

Pod Security Policy

PSP is deprecated as of Kubernetes v1.21 and will be removed in Kubernetes v1.25. PSP will continue to be fully functional for StarlingX Release 8.0.

Since it has been introduced PSP has had usability problems. The way PSPs are applied to pods has proven confusing especially when trying to use them. It is easy to accidentally grant broader permissions than intended, and difficult to inspect which PSPs apply in a certain situation. Kubernetes offers a built-in PSA controller that will replace PSPs in the future.


Release Information for other versions

You can find details about a release on the specific release page.


Release Date



StarlingX R8.0




StarlingX R7.0




StarlingX R6.0




StarlingX R5.0.1




StarlingX R5.0




StarlingX R4.0



StarlingX R3.0



StarlingX R2.0.1



StarlingX R2.0



StarlingX R12.0



StarlingX follows the release maintenance timelines in the StarlingX Release Plan.

The Status column uses OpenStack maintenance phase definitions.