Chapter 8. Known issues

The reboot --kexec and inst.kexec commands do not provide a predictable system state

Performing a RHEL installation with the reboot --kexec Kickstart command or the inst.kexec kernel boot parameters do not provide the same predictable system state as a full reboot. As a consequence, switching to the installed system without rebooting can produce unpredictable results.

Local Media installation source is not detected when booting the installation from a USB that is created using a third party tool

When booting the RHEL installation from a USB that is created using a third party tool, the installer fails to detect the Local Media installation source (only Red Hat CDN is detected).

The auth and authconfig Kickstart commands require the AppStream repository

The authselect-compat package is required by the auth and authconfig Kickstart commands during installation. Without this package, the installation fails if auth or authconfig are used. However, by design, the authselect-compat package is only available in the AppStream repository.

Unexpected SELinux policies on systems where Anaconda is running as an application

When Anaconda is running as an application on an already installed system (for example to perform another installation to an image file using the –image anaconda option), the system is not prohibited to modify the SELinux types and attributes during installation. As a consequence, certain elements of SELinux policy might change on the system where Anaconda is running. To work around this problem, do not run Anaconda on the production system and execute it in a temporary virtual machine. So that the SELinux policy on a production system is not modified. Running anaconda as part of the system installation process such as installing from boot.iso or dvd.iso is not affected by this issue.

The USB CD-ROM drive is not available as an installation source in Anaconda

Installation fails when the USB CD-ROM drive is the source for it and the Kickstart ignoredisk --only-use= command is specified. In this case, Anaconda cannot find and use this source disk.

Minimal RHEL installation no longer includes the s390utils-base package

In RHEL 8.4 and later, the s390utils-base package is split into an s390utils-core package and an auxiliary s390utils-base package. Consequently, setting the RHEL installation to minimal-environment installs only the necessary s390utils-core package and not the auxiliary s390utils-base package. To work around this problem, manually install the s390utils-base package after completing the RHEL installation or explicitly install s390utils-base using a kickstart file.

Hard drive partitioned installations with iso9660 filesystem fails

You cannot install RHEL on systems where the hard drive is partitioned with the iso9660 filesystem. This is due to the updated installation code that is set to ignore any hard disk containing a iso9660 file system partition. This happens even when RHEL is installed without using a DVD.

Anaconda fails to verify existence of an administrator user account

While installing RHEL using a graphical user interface, Anaconda fails to verify if the administrator account has been created. As a consequence, users might install a system without any administrator user account.

Anaconda fails to login iSCSI server using the no authentication method after unsuccessful CHAP authentication attempt

When you add iSCSI discs using CHAP authentication and the login attempt fails due to incorrect credentials, a relogin attempt to the discs with the no authentication method fails. To workaround this problem, close the current session and login using the no authentication method.

New XFS features prevent booting of PowerNV IBM POWER systems with firmware older than version 5.10

PowerNV IBM POWER systems use a Linux kernel for firmware, and use Petitboot as a replacement for GRUB. This results in the firmware kernel mounting /boot and Petitboot reading the GRUB config and booting RHEL.

Cannot install RHEL when PReP is not 4 or 8 MiB in size

The RHEL installer cannot install the boot loader if the PowerPC Reference Platform (PReP) partition is of a different size than 4 MiB or 8 MiB on a disk that uses 4 kiB sectors. As a consequence, you cannot install RHEL on the disk.

New XFS features prevent booting of PowerNV IBM POWER systems with firmware kernel older than version 5.10

PowerNV IBM POWER systems use a Linux kernel for firmware, and use Petitboot as a replacement for GRUB. This results in the firmware kernel mounting /boot and Petitboot reading the GRUB config and booting RHEL.

RHEL installer does not process the inst.proxy boot option correctly

When running Anaconda, the installation program does not process the inst.proxy boot option correctly. As a consequence, you cannot use the specified proxy to fetch the installation image.

RHEL installation fails on IBM Z architectures with multi-LUNs

RHEL installation fails on IBM Z architectures when using multiple LUNs during installation. Due to the multipath setup of FCP and the LUN auto-scan behavior, the length of the kernel command line in the configuration file exceeds 896 bytes.

RHEL installer does not automatically discover or use iSCSI devices as boot devices on aarch64

The absence of the iscsi_ibft kernel module in RHEL installers running on aarch64 prevents automatic discovery of iSCSI devices defined in firmware. These devices are not automatically visible in the installer nor selectable as boot devices when added manually by using the GUI. As a workaround, add the "inst.nonibftiscsiboot" parameter to the kernel command line when booting the installer and then manually attach iSCSI devices through the GUI. As a result, the installer can recognize the attached iSCSI devices as bootable and installation completes as expected.

virt-who cannot connect to ESX servers when in FIPS mode

When using the virt-who utility on a RHEL 9 system in FIPS mode, virt-who cannot connect to ESX servers. As a consequence, virt-who does not report any ESX servers, even if configured for them, and logs the following error message:

The Installation process sometimes becomes unresponsive

When you install RHEL, the installation process sometimes becomes unresponsive. The /tmp/packaging.log file displays the following message at the end:

ReaR fails during recovery if the TMPDIR variable is set in the configuration file

Setting and exporting TMPDIR in the /etc/rear/local.conf or /etc/rear/site.conf ReaR configuration file does not work and is deprecated.

Renaming network interfaces using ifcfg files fails

On RHEL 9, the initscripts package is not installed by default. Consequently, renaming network interfaces using ifcfg files fails. To solve this problem, Red Hat recommends that you use udev rules or link files to rename interfaces. For further details, see Consistent network interface device naming and the systemd.link(5) man page.

The chkconfig package is not installed by default in RHEL 9

The chkconfig package, which updates and queries runlevel information for system services, is not installed by default in RHEL 9.

Both bind and unbound disable validation of SHA-1-based signatures

The bind and unbound components disable validation support of all RSA/SHA1 (algorithm number 5) and RSASHA1-NSEC3-SHA1 (algorithm number 7) signatures, and the SHA-1 usage for signatures is restricted in the DEFAULT system-wide cryptographic policy.

named fails to start if the same writable zone file is used in multiple zones

BIND does not allow the same writable zone file in multiple zones. Consequently, if a configuration includes multiple zones which share a path to a file that can be modified by the named service, named fails to start. To work around this problem, use the in-view clause to share one zone between multiple views and make sure to use different paths for different zones. For example, include the view names in the path.

Setting the console keymap requires the libxkbcommon library on your minimal install

In RHEL 9, certain systemd library dependencies have been converted from dynamic linking to dynamic loading, so that your system opens and uses the libraries at runtime when they are available. With this change, a functionality that depends on such libraries is not available unless you install the necessary library. This also affects setting the keyboard layout on systems with a minimal install. As a result, the localectl --no-convert set-x11-keymap gb command fails.

OpenSSL does not detect if a PKCS #11 token supports the creation of raw RSA or RSA-PSS signatures

The TLS 1.3 protocol requires support for RSA-PSS signatures. If a PKCS #11 token does not support raw RSA or RSA-PSS signatures, server applications that use the OpenSSL library fail to work with an RSA key if the key is held by the PKCS #11 token. As a result, TLS communication fails in the described scenario.

OpenSSL incorrectly handles PKCS #11 tokens that does not support raw RSA or RSA-PSS signatures

The OpenSSL library does not detect key-related capabilities of PKCS #11 tokens. Consequently, establishing a TLS connection fails when a signature is created with a token that does not support raw RSA or RSA-PSS signatures.

Cryptography not approved by FIPS works in OpenSSL in FIPS mode

Cryptography that is not FIPS-approved works in the OpenSSL toolkit regardless of system settings. Consequently, you can use cryptographic algorithms and ciphers that should be disabled when the system is running in FIPS mode, for example:

OpenSSL cannot use engines in FIPS mode

Engine API is deprecated in OpenSSL 3.0 and is incompatible with OpenSSL Federal Information Processing Standards (FIPS) implementation and other FIPS-compatible implementations. Therefore, OpenSSL cannot run engines in FIPS mode. There is no workaround for this problem.

PSK ciphersuites do not work with the FUTURE crypto policy

Pre-shared key (PSK) ciphersuites are not recognized as performing perfect forward secrecy (PFS) key exchange methods. As a consequence, the ECDHE-PSK and DHE-PSK ciphersuites do not work with OpenSSL configured to SECLEVEL=3, for example with the FUTURE crypto policy. As a workaround, you can set a less restrictive crypto policy or set a lower security level (SECLEVEL) for applications that use PSK ciphersuites.

GnuPG incorrectly allows using SHA-1 signatures even if disallowed by crypto-policies

The GNU Privacy Guard (GnuPG) cryptographic software can create and verify signatures that use the SHA-1 algorithm regardless of the settings defined by the system-wide cryptographic policies. Consequently, you can use SHA-1 for cryptographic purposes in the DEFAULT cryptographic policy, which is not consistent with the system-wide deprecation of this insecure algorithm for signatures.

Some OpenSSH operations do not used FIPS-approved interfaces

The OpenSSL cryptographic library, which is used by OpenSSH, provides two interfaces: legacy and modern. Because of changes to OpenSSL internals, only the modern interfaces use FIPS-certified implementations of cryptographic algorithms. Because OpenSSH uses legacy interfaces for some operations, it does not comply with FIPS requirements.

gpg-agent does not work as an SSH agent in FIPS mode

The gpg-agent tool creates MD5 fingerprints when adding keys to the ssh-agent program even though FIPS mode disables the MD5 digest. Consequently, the ssh-add utility fails to add the keys to the authentication agent.

SELinux staff_u users can incorrectly switch to unconfined_r

When the secure_mode boolean is enabled, staff_u users can incorrectly switch to the unconfined_r role. As a consequence, staff_u users can perform privileged operations affecting the security of the system.

Default SELinux policy allows unconfined executables to make their stack executable

The default state of the selinuxuser_execstack boolean in the SELinux policy is on, which means that unconfined executables can make their stack executable. Executables should not use this option, and it might indicate poorly coded executables or a possible attack. However, due to compatibility with other tools, packages, and third-party products, Red Hat cannot change the value of the boolean in the default policy. If your scenario does not depend on such compatibility aspects, you can turn the boolean off in your local policy by entering the command setsebool -P selinuxuser_execstack off.

Remediating service-related rules during kickstart installations might fail

During a kickstart installation, the OpenSCAP utility sometimes incorrectly shows that a service enable or disable state remediation is not needed. Consequently, OpenSCAP might set the services on the installed system to a non-compliant state. As a workaround, you can scan and remediate the system after the kickstart installation. This will fix the service-related issues.

SSH timeout rules in STIG profiles configure incorrect options

An update of OpenSSH affected the rules in the following Defense Information Systems Agency Security Technical Implementation Guide (DISA STIG) profiles:

fagenrules --load does not work correctly

The fapolicyd service does not correctly handle the signal hang up (SIGHUP). Consequently, fapolicyd terminates after receiving the SIGHUP signal. Therefore, the fagenrules --load command does not work properly, and rule updates require manual restarts of fapolicyd. To work around this problem, restart the fapolicyd service after any change in rules, and as a result fagenrules --load will work correctly.

Ansible remediations require additional collections

With the replacement of Ansible Engine by the ansible-core package, the list of Ansible modules provided with the RHEL subscription is reduced. As a consequence, running remediations that use Ansible content included within the scap-security-guide package requires collections from the rhc-worker-playbook package.

The nm-cloud-setup service removes manually-configured secondary IP addresses from interfaces

Based on the information received from the cloud environment, the nm-cloud-setup service configures network interfaces. Disable nm-cloud-setup to manually configure interfaces. However, in certain cases, other services on the host can configure interfaces as well. For example, these services could add secondary IP addresses. To avoid that nm-cloud-setup removes secondary IP addresses:

An empty rd.znet option in the kernel command line causes the network configuration to fail

An rd.znet option without any arguments, such as net types or subchannels, in the kernel fails to configure networking. To work around this problem, either remove the rd.znet option from the command line completely or specify relevant net types, subchannels, and other relevant options. For more information about these options, see the dracut.cmdline(7) man page.

Failure to update the session key causes the connection to break

Kernel Transport Layer Security (kTLS) protocol does not support updating the session key, which is used by the symmetric cipher. Consequently, the user cannot update the key, which causes a connection break. To work around this problem, disable kTLS. As a result, with the workaround, it is possible to successfully update the session key.

The initscripts package is not installed by default

By default, the initscripts package is not installed. As a consequence, the ifup and ifdown utilities are not available. As an alternative, use the nmcli connection up and nmcli connection down commands to enable and disable connections. If the suggested alternative does not work for you, report the problem and install the NetworkManager-initscripts-updown package, which provides a NetworkManager solution for the ifup and ifdown utilities.

The primary IP address of an instance changes after starting the nm-cloud-setup service in Alibaba Cloud

After launching an instance in the Alibaba Cloud, the nm-cloud-setup service assigns the primary IP address to an instance. However, if you assign multiple secondary IP addresses to an instance and start the nm-cloud-setup service, the former primary IP address gets replaced by one of the already assigned secondary IP addresses. The returned list of metadata verifies the same. To work around the problem, configure secondary IP addresses manually to avoid that the primary IP address changes. As a result, an instance retains both IP addresses and the primary IP address does not change.

kdump fails to start on RHEL 9 kernel

The RHEL 9 kernel does not have the crashkernel=auto parameter configured as default. Consequently, the kdump service fails to start by default.

The kdump mechanism fails to capture vmcore on LUKS-encrypted targets

When running kdump on systems with Linux Unified Key Setup (LUKS) encrypted partitions, systems require a certain amount of available memory. When the available memory is less than the required amount of memory, the systemd-cryptsetup service fails to mount the partition. Consequently, the second kernel fails to capture the crash dump file (vmcore) on LUKS-encrypted targets.

Allocating crash kernel memory fails at boot time

On certain Ampere Altra systems, allocating the crash kernel memory for kdump usage fails during boot when the available memory is below 1 GB. Consequently, the kdumpctl command fails to start the kdump service as the required memory is more than the available memory size.

kTLS does not support offloading of TLS 1.3 to NICs

Kernel Transport Layer Security (kTLS) does not support offloading of TLS 1.3 to NICs. Consequently, software encryption is used with TLS 1.3 even when the NICs support TLS offload. To work around this problem, disable TLS 1.3 if offload is required. As a result, you can offload only TLS 1.2. When TLS 1.3 is in use, there is lower performance, since TLS 1.3 cannot be offloaded.

FADump enabled with Secure Boot might lead to GRUB Out of Memory (OOM)

In the Secure Boot environment, GRUB and PowerVM together allocate a 512 MB memory region, known as the Real Mode Area (RMA), for boot memory. The region is divided among the boot components and, if any component exceeds its allocation, out-of-memory failures occur.

Systems in Secure Boot cannot run dynamic LPAR operations

Users cannot run dynamic logical partition (DLPAR) operations from the Hardware Management Console (HMC) if either of these conditions are met:

dkms provides an incorrect warning on program failure with correctly compiled drivers on 64-bit ARM CPUs

The Dynamic Kernel Module Support (dkms) utility does not recognize that the kernel headers for 64-bit ARM CPUs work for both the kernels with 4 kilobytes and 64 kilobytes page sizes. As a result, when the kernel update is performed and the kernel-64k-devel package is not installed, dkms provides an incorrect warning on why the program failed on correctly compiled drivers. To work around this problem, install the kernel-headers package, which contains header files for both types of ARM CPU architectures and is not specific to dkms and its requirements.

New kernels lose previous command-line options

The GRUB boot loader does not apply custom, previously configured kernel command-line options to new kernels. Consequently, when you upgrade the kernel package, the system behavior might change after reboot due to the missing options.

Device Mapper Multipath is not supported with NVMe/TCP

Using Device Mapper Multipath with the nvme-tcp driver can result in the Call Trace warnings and system instability. To work around this problem, NVMe/TCP users must enable native NVMe multipathing and not use the device-mapper-multipath tools with NVMe.

The blk-availability systemd service deactivates complex device stacks

In systemd, the default block deactivation code does not always handle complex stacks of virtual block devices correctly. In some configurations, virtual devices might not be removed during the shutdown, which causes error messages to be logged. To work around this problem, deactivate complex block device stacks by executing the following command:

Invalid sysfs value for supported_speeds

The qla2xxx driver reports 20Gb/s instead of the expected 64Gb/s as one of the supported port speeds in the sysfs supported_speeds attribute:

Unable to connect to NVMe namespaces from Broadcom initiator on AMD EPYC systems

By default, the RHEL kernel enables the IOMMU on AMD-based platforms. Consequently, when you use IOMMU-enabled platforms on servers with AMD processors, you might experience NVMe I/O problems, such as I/Os failing due to transfer length mismatches.

The --ssl-fips-mode option in MySQL and MariaDB does not change FIPS mode

The --ssl-fips-mode option in MySQL and MariaDB in RHEL works differently than in upstream.

Certain symbol-based probes do not work in SystemTap on the 64-bit ARM architecture

Kernel configuration disables certain functionality needed for SystemTap. Consequently, some symbol-based probes do not work on the 64-bit ARM architecture. As a result, affected SystemTap scripts may not run or may not collect hits on desired probe points.

RHEL 9 Kerberos client fails to authenticate a user using PKINIT against Heimdal KDC

During the PKINIT authentication of an IdM user on a RHEL 9 Kerberos client, the Heimdal Kerberos Distribution Center (KDC) on RHEL 9 or earlier uses the SHA-1 backup signature algorithm because the Kerberos client does not support the supportedCMSTypes field. However, the SHA-1 algorithm has been deprecated in RHEL 9 and therefore the user authentication fails.

The PKINIT authentication of a user fails if a RHEL 9 Kerberos agent communicates with a non-RHEL 9 Kerberos agent

If a RHEL 9 Kerberos agent interacts with another, non-RHEL 9 Kerberos agent in your environment, the Public Key Cryptography for initial authentication (PKINIT) authentication of a user fails. To work around the problem, perform one of the following actions:

The DEFAULT:SHA1 sub-policy has to be set on RHEL 9 clients for PKINIT to work against older RHEL KDCs and AD KDCs

The SHA-1 digest algorithm has been deprecated in RHEL 9, and CMS messages for Public Key Cryptography for initial authentication (PKINIT) are now signed with the stronger SHA-256 algorithm.

Directory Server terminates unexpectedly when started in referral mode

Due to a bug, global referral mode does not work in Directory Server. If you start the ns-slapd process with the refer option as the dirsrv user, Directory Server ignores the port settings and terminates unexpectedly. Trying to run the process as the root user changes SELinux labels and prevents the service from starting in future in normal mode. There are no workarounds available.

Configuring a referral for a suffix fails in Directory Server

If you set a back-end referral in Directory Server, setting the state of the backend using the dsconf <instance_name> backend suffix set --state referral command fails with the following error:

The dsconf utility has no option to create fix-up tasks for the entryUUID plug-in

The dsconf utility does not provide an option to create fix-up tasks for the entryUUID plug-in. As a result, administrators cannot not use dsconf to create a task to automatically add entryUUID attributes to existing entries. As a workaround, create a task manually:

Potential risk when using the default value for ldap_id_use_start_tls option

When using ldap:// without TLS for identity lookups, it can pose a risk for an attack vector. Particularly a man-in-the-middle (MITM) attack which could allow an attacker to impersonate a user by altering, for example, the UID or GID of an object returned in an LDAP search.

Firefox add-ons are disabled after upgrading to RHEL 9

If you upgrade from RHEL 8 to RHEL 9, all add-ons that you previously enabled in Firefox are disabled.

VNC is not running after upgrading to RHEL 9

After upgrading from RHEL 8 to RHEL 9, the VNC server fails to start, even if it was previously enabled.

Matrox G200e shows no output on a VGA display

Your display might show no graphical output if you use the following system configuration:

X.org configuration utilities do not work under Wayland

X.org utilities for manipulating the screen do not work in the Wayland session. Notably, the xrandr utility does not work under Wayland due to its different approach to handling, resolutions, rotations, and layout.

NVIDIA drivers might revert to X.org

Under certain conditions, the proprietary NVIDIA drivers disable the Wayland display protocol and revert to the X.org display server:

Night Light is not available on Wayland with NVIDIA

When the proprietary NVIDIA drivers are enabled on your system, the Night Light feature of GNOME is not available in Wayland sessions. The NVIDIA drivers do not currently support Night Light.

Removing USB host devices using the web console does not work as expected

When you attach a USB device to a virtual machine (VM), the device number and bus number of the USB device might change after they are passed to the VM. As a consequence, using the web console to remove such devices fails due to the incorrect correlation of the device and bus numbers. To workaround this problem, remove the <hostdev> part of the USB device, from the VM’s XML configuration.

Attaching multiple host devices using the web console does not work

When you select multiple devices to attach to a virtual machine (VM) using the web console, only a single device is attached and the rest are ignored. To work around this problem, attach only one device at a time.

Installing a virtual machine over https in some cases fails

Currently, the virt-install utility fails when attempting to install a guest operating system from an ISO source over a https connection - for example using virt-install --cdrom https://example/path/to/image.iso. Instead of creating a virtual machine (VM), the described operation terminates unexpectedly with an internal error: process exited while connecting to monitor message.

Using NVIDIA drivers in virtual machines disables Wayland

Currently, NVIDIA drivers are not compatible with the Wayland graphical session. As a consequence, RHEL guest operating systems that use NVIDIA drivers automatically disable Wayland and load an Xorg session instead. This primarily occurs in the following scenarios:

The Milan VM CPU type is sometimes not available on AMD Milan systems

On certain AMD Milan systems, the Enhanced REP MOVSB (erms) and Fast Short REP MOVSB (fsrm) feature flags are disabled in the BIOS by default. Consequently, the 'Milan' CPU type might not be available on these systems. In addition, VM live migration between Milan hosts with different feature flag settings might fail. To work around these problems, manually turn on erms and fsrm in the BIOS of your host.

Network traffic performance in virtual machines might be reduced

In some cases, RHEL 9.0 guest virtual machines (VMs) have somewhat decreased performance when handling high levels of network traffic.

Disabling AVX causes VMs to become unbootable

On a host machine that uses a CPU with Advanced Vector Extensions (AVX) support, attempting to boot a VM with AVX explicitly disabled currently fails, and instead triggers a kernel panic in the VM.

Failover virtio NICs are not assigned an IP address on Windows virtual machines

Currently, when starting a Windows virtual machine (VM) with only a failover virtio NIC, the VM fails to assign an IP address to the NIC. Consequently, the NIC is unable to set up a network connection. Currently, there is no workaround.

A hostdev interface with failover settings cannot be hot-plugged after being hot-unplugged

After removing a hostdev network interface with failover configuration from a running virtual machine (VM), the interface currently cannot be re-attached to the same running VM.

Live post-copy migration of VMs with failover VFs fails

Currently, attempting to post-copy migrate a running virtual machine (VM) fails if the VM uses a device with the virtual function (VF) failover capability enabled. To work around the problem, use the standard migration type, rather than post-copy migration.

SR-IOV performs suboptimally in ARM 64 RHEL 9 virtual machines on Azure

Currently, SR-IOV networking devices have significantly lower throughout and higher latency than expected in ARM 64 RHEL 9 virtual machines VMs running on a Microsoft Azure platform.

Mouse is not usable in RHEL 9 VMs on XenServer 7 with console proxy

When running a RHEL 9 virtual machine (VM) on a XenServer 7 platform with a console proxy, it is not possible to use the mouse in the VM’s GUI. To work around this problem, disable the Wayland compositor protocol in the VM as follows:

Cloning or restoring RHEL 9 virtual machines that use LVM on Nutanix AHV causes non-root partitions to disappear

When running a RHEL 9 guest operating system on a virtual machine (VM) hosted on the Nutanix AHV hypervisor, restoring the VM from a snapshot or cloning the VM currently causes non-root partitions in the VM to disappear if the guest is using Logical Volume Management (LVM). As a consequence, the following problems occur:

The SR-IOV functionality of a network adapter attached to a Hyper-V virtual machine might not work

Currently, when attaching a network adapter with single-root I/O virtualization (SR-IOV) enabled to a RHEL 9 virtual machine (VM) running on Microsoft Hyper-V hypervisor, the SR-IOV functionality in some cases does not work correctly.

Customizing RHEL 9 guests on ESXi sometimes causes networking problems

Currently, customizing a RHEL 9 guest operating system in the VMware ESXi hypervisor does not work correctly with NetworkManager key files. As a consequence, if the guest is using such a key file, it will have incorrect network settings, such as the IP address or the gateway.

Timeout when running sos report on IBM Power Systems, Little Endian

When running the sos report command on IBM Power Systems, Little Endian with hundreds or thousands of CPUs, the processor plugin reaches its default timeout of 300 seconds when collecting huge content of the /sys/devices/system/cpu directory. As a workaround, increase the plugin’s timeout accordingly:

Container images signed with a Beta GPG key can not be pulled

Currently, when you try to pull RHEL 9 Beta container images, podman exits with the error message: Error: Source image rejected: None of the signatures were accepted. The images fail to be pulled due to current builds being configured to not trust the RHEL Beta GPG keys by default.

Podman fails to pull a container "X509: certificate signed by unknown authority"

If you have your own internal registry signed by our own CA certificate, then you have to import the certificate onto your host machine. Otherwise, an error occurs:

Running systemd within an older container image does not work

Running systemd within an older container image, for example, centos:7, does not work:

podman system connection add and podman image scp fails

Podman uses SHA-1 hashes for the RSA key exchange. The regular SSH connection among machines using RSA keys works, while the podman system connection add and podman image scp commands do not work using the same RSA keys, because the SHA-1 hashes are not accepted for key exchange on RHEL 9: