Red Hat Knowledgebase
Welcome to Red Hat’s Knowledgebase information center. Find resources for resolving problems and troubleshooting. Log in to see all our solutions and articles. Some are restricted to verified users.
If you don’t have a Red Hat account yet, register and open one! For details about these accounts, see Developer Subscription Information or Customer Account Information.
Find what you need
Latest resources
Browse the latest published and updated knowledgebaseRed Hat Satellite update fails with DNF dependency error on openssl-devel
- Running `satellite-maintain update run` or `dnf update` on a Red Hat Satellite fails during package transaction check with an openssl-devel dependency error: ~~~ Error: Problem: cannot install the best update candidate for package openssl-devel-1:3.5.5-6.el9_8.x86_64- nothing provides openssl-libs(x86-64) = 1:3.5.8-2.el9_8 needed by openssl-devel-1:3.5.8-2.el9_8.x86_64 from rhel-9-for-x86_64-appstream-rpms (try to add ';--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)-------------------------------------------------------------------------------- Scenario [Procedures before migrating] failed. ~~~
EDA worker fails with RedisClusterException: WATCH method is not supported in Redis Cluster
- The EDA pod is stuck in a continuous crash loop. This behavior often occurs following a database restore or a migration that introduces "Abandoned Jobs" into the EDA database. The following errors are observed in the `aap-eda-default-worker` pod logs: ~~~ 2026-03-25T07:11:08.527133232Z File ";/usr/lib/python3.12/site-packages/redis/cluster.py", line 2147, in watch 2026-03-25T07:11:08.527133232Z raise RedisClusterException("method watch() is not implemented") 2026-03-25T07:11:08.527133232Z redis.exceptions.RedisClusterException: method watch() is not implemented 2026-03-25T07:11:08.528780646Z 2026-03-25 07:11:08,528 INFO rq.worker Worker ba6727fdfe7245de961265e4f13864ad: unsubscribing from channel {eda-rq}:pubsub:ba6727fdfe7245de961265e4f13864ad 2026-03-25T07:11:08.529491851Z 2026-03-25 07:11:08,529 INFO aap_eda.core.tasking Worker exited normally with True ~~~
Red Hat Access: Red Hat Support Tool
Red Hat's Global Support Services is pleased to announce the introduction of Red Hat Access in Red Hat Enterprise Linux. With Red Hat Access, delivered through the Red Hat Support Tool, customers can find help, get answers, and utilize diagnostic services using exclusive Red Hat knowledge, resources, and functionality, all within a Linux terminal.
Troubleshooting Machine Config Operator Degradation in OpenShift 4.22.0: Boot Image Update Failure
* After upgrading to Red Hat OpenShift Container Platform (OCP) `4.22`, the Machine Config Operator (MCO) reports as `Degraded` and blocks future upgrades * The boot image controller fails to download the Red Hat Enterprise Linux CoreOS (RHCOS) OVA file from `rhcos.mirror.openshift.com`, resulting in an `i/o timeout` error * The `machine-config-controller` pod is missing `HTTP_PROXY` and `HTTPS_PROXY` environment variables, causing direct internet connection attempts that are blocked in proxied or disconnected environments
Is EgressIP supported on Hosted Control Planes (HCP)?
- Is `EgressIP` supported on Hosted Control Planes (HCP)?- Is configuring an `EgressIP` on an additional network interface supported on Hosted Control Planes (HCP)?- Is configuring an `EgressIP` on HCP installed on the `KubeVirt` or `Agent-Based platform` supported?
Disk space is not reclaimed after deleting files or directories on XFS filesystem
* Disk space is not reclaimed after deleting files or directories on XFS filesystem with reflink enabled * Deleting files or directories (such as older snapshots or repository backups) does not free or reclaim disk space on an XFS filesystem.
Is it possible to modify DNS 'timeouts' and 'attempts' for RHOCP 4 nodes?
* Is it possible to modify `DNS` options such as `timeout` and `attempts` on Red Hat OpenShift nodes? * How to modify `timeout` and `attempts` parameters in` /etc/resolv.conf` file using `MachineConfig`? Is this supported by Red Hat? * How to be provided DNS configs to the master nodes. * The MachineConfig used to modify the ";/etc/resolv.conf" is no more working after migrating from OpenShiftSDN to OVNKubernetes. * How to change the DNS options using NMstate operator. * How to change /etc/resolv.conf when OVNKubernetes is used in RHOCP 4
SAML login to Ansible Automation Platform fails with Azure Active Directory / Microsoft Entra ID error AADSTS50105
* When attempting to log in to Ansible Automation Platform via SAML Single Sign-On (SSO) with Microsoft Entra ID (formerly Azure Active Directory) as the Identity Provider, the authentication process fails on the Identity Provider side. * The browser displays an HTTP 400 Bad Request error page from Microsoft Entra ID containing the error code `AADSTS50105`. * The browser is never redirected back to the Ansible Automation Platform Assertion Consumer Service (ACS) callback URL.
Trending
Solutions
Solve specific problems that has been raised with Red HatThe 'satellite-maintain service status' command shows dynflow-sidekiq@orchestrator.s...
- The `dynflow-sidekiq@orchestrator.service` shows the **FAIL** state when listing the **Red Hat Satellite** core service with the `satellite-maintain service status` command on the Satellite host. - Unable to start dynflow-sidekiq@orchestrator.service with satellite-maintain service in Red Hat Satellite 6.
How to increase open files limits in RHOCP 4
- There are some cases when an increase of open files limits is needed. The open files limits is 1048576 by default in RHEL8 based RHCOS builds. In RHEL9 RHCOS builds the default limit was [changed](https://github.com/cri-o/cri-o/issues/7703) to 1024:524288
OpenShift Agent-Based (Assisted) Installer failing - Hosts not validated
- OpenShift Agent-Based (Assisted) Installer is failing with "Hosts not validated"
Articles
Technical briefs, reference architectures, and early stages of documentationVmcore analysis techniques
Tips and tricks used to figure out what caused a system to panic.
Red Hat Case Management - Attachment Service API Guide
This document is the API usage guide for the Red Hat Case Management Attachment Service. It covers authentication, upload (single part and multipart up to 5 TB), download, deletion, status tracking, and metadata listing for file attachments on Red Hat support cases. The intended audience is developers and integration engineers building clients that interact with the attachment APIs at `https://api.access.redhat.com/support`.
Uninstalling an OpenShift cluster
Should you need to uninstall an openshift cluster, here are the general instructions for uninstalling a cluster.
Latest discussions in the Red Hat Community
RHEL 10 repositories out of sync? Missing BaseOS dependencies
The roadmap beyond Red Hat Enterprise Linux 10: Building platforms the open source w...
RedHat support of tboot, now and forward
Get support
Support cases
Get answers quickly by opening a support case with us.
Live chat
Directly access our support engineers during weekday business hours.
Call or email
Speak directly with a Red Hat Support expert by phone or through email.
