Chapter 11. Deprecated features
Deprecated functionalities are fully supported, which means that they are tested and maintained, and their support status remains unchanged within Red Hat Enterprise Linux 9. However, they will likely not be supported in a future major version release, and are not recommended for new deployments on the current or future major versions of Red Hat Enterprise Linux.
Features can be deprecated during a major version’s release cycle.
A deprecated feature is listed in all future release notes until it is removed. For a complete list of deprecated features, see the release notes for the latest minor version. For information about the length of support, see Red Hat Enterprise Linux Life Cycle and Red Hat Enterprise Linux Application Streams Life Cycle.
11.1. Installer and image creation
Anaconda built-in help has been removed
The built-in documentation from spokes and hubs of all Anaconda user interfaces, which was available during Anaconda installation, has been removed. Instead, refer to the official RHEL documentation.
Jira:RHELDOCS-18414[1]
The squashfs package has been deprecated
The squashfs package has been deprecated, and. As an alternative, dracut has support for mounting erofs.
Jira:RHELDOCS-18903[1]
sgdisk has been deprecated from the boot.iso
gdisk has been deprecated from the boot.iso image type. You still can use gdisk in your kickstarts. For the boot.iso image type, other tools are available for handling GPT disks, for example, the parted utility.
Jira:RHELDOCS-18904[1]
The module kickstart command has been deprecated
Anaconda has deprecated its support for DNF modularity, and as a consequence the module kickstart command has been deprecated. This might impact you if you are using modules in the %packages section of your kickstart files or the module kickstart command. This change is implemented for simplifying the installation process and ensuring a more consistent experience moving forward.
The inst.gpt boot option is now deprecated
The inst.gpt boot option is now deprecated and will be removed in the future releases. To specify a preferred disk label type, use the inst.disklabel boot option. Specify gpt or mbr to create GPT or MBR disk labels, respectively.
Jira:RHELDOCS-18491[1]
11.2. Security
ENGINE API in OpenSSL is deprecated
In RHEL 10, ENGINE API is deprecated and is planned to be removed in a future major release. No new applications should be built by using the ENGINE API. To keep application binary interface (ABI) and existing applications working, OpenSSL still exports the ENGINE symbols. To prevent new applications from using ENGINE API, OpenSSL sets the OPENSSL_NO_ENGINE flag system-wide, and the header engine.h that exposes the ENGINE API has been removed.
HMAC-SHA-1 in FIPS mode is deprecated
The HMAC-SHA-1 cryptographic algorithm is deprecated in FIPS mode, and it may be removed in a future release. Outside FIPS mode, support for HMAC-SHA-1 is preserved.
11.3. Shells and command-line tools
The perl(Mail::Sender) module has been removed
The perl(Mail::Sender) module is removed from RHEL 10 without any replacement. As a consequence, the checkbandwidth script from net-snmp-perl package does not support email alerts when bandwidth high/low levels for a host or interface are reached.
Jira:RHEL-44478[1]
11.4. High availability and clusters
Deprecated High Availability Add-On features
The following features have been deprecated in Red Hat Enterprise Linux 10 and will be removed in the next major release
- Specifying rules as multiple arguments. Use a single string argument instead.
-
Specifying
scoreas a standalone value inpcs constraint location addandpcs constraint colocation ad. Usescore=valueinstead. Specifying the
--waitoption in resource commands exceptpcs resource restart | move, and in the commandspcs cluster node add-guest | add-remote. Use the following commands instead:-
pcs status waitto wait for the cluster to settle into stable state. -
pcs status query resourcecommands to verify that the resource is in the expected state after the wait.
-
-
Using the
--forceflag to confirm potentially destructive actions such aspcs cluster destroy,pcs quorum unblock,pcs stonith confirm,pcs stonith sbd device setup, andpcs stonith sbd watchdog testcommands. You should now use the--yesflag to confirm potentially destructive actions and reserve use of the--forceflag to override validation errors. -
Using the
--forceflag to confirm overwriting files inpcs cluster report. Use the--overwriteflag instead. -
Assigning and unassigning ACL roles without specifying the
userorgroupkeyword.
The pcs command-line interface produces a warning when a user attempts to configure a system with these deprecated features.
- Configuring a score parameter in order constraints
- Use of the rkt container engine in bundles
- Support for upstart and nagios resources
-
The
monthdays,weekdays,weekyears,yearsdaysandmoondate specification options for configuring Pacemaker rules -
The
yearsdaysandmoonduration options for configuring Pacemaker rules"
Jira:RHELDOCS-18544[1]
11.5. Compilers and development tools
The utmp and utmpx interfaces in glibc are deprecated
The utmp and utmpx interfaces provided by the glibc library include a counter that counts time since the Unix epoch. This counter will overflow on February 07, 2106. Therefore, utmp and utmpx are deprecated in RHEL 10 and will be removed in RHEL 11.
Jira:RHELDOCS-18080[1]
11.6. The web console
The host switcher in the RHEL web console is deprecated
The host switcher that provides connections to multiple machines through SSH from a single RHEL web console session is deprecated and disabled by default. Due to the web technology limitations, this feature cannot be secure. You can enable the host switcher after assessing the risks in your scenario. As more secure alternatives, you can use:
- the web console login page (with the secure limit of one host in a web browser session)
- the Cockpit Client flatpack
Jira:RHEL-4032[1]
11.7. Virtualization
libslirp has been deprecated
In RHEL 10, the libslirp networking back end has become deprecated, and will be removed in a future major version release.
The i440fx virtual machine type has been deprecated
In RHEL 10, the i440fx machine types for virtual machines (VMs) have become deprecated, and will be removed in a future major version of RHEL.
In addition, the i440fx-rhel7.6 machine type has been replaced by i440fx-rhel10.0. As a consequence, a VM with a i440fx-rhel7.6 machine type will not boot correctly after live migrating to a RHEL 10 host. To work around this issue, restart the VM after live migration.
Jira:RHELDOCS-18672[1]
11.8. Containers
The runc container runtime has been removed
The runc container runtime is removed. The default container runtime is crun. If you upgrade from the previous RHEL versions to RHEL 10.0 Beta, you have to run the podman system migrate --new-runtime=crun command to set a new OCI runtime for all containers.
Jira:RHELDOCS-19051[1]
tzdata package is no longer installed by default in the minimal container images
The tzdata package is no longer installed in the registry.access.redhat.com/ubi10-beta-minimal container image. As a consequence, if you migrate your minimal container builds from a previous RHEL release to RHEL 10.0 Beta, and you enter the microdnf reinstall tzdata command to reinstall the tzdata package, you get an error message because the tzdata package is no longer installed by default. In this case, enter the microdnf install tzdata command to install tzdata.
Jira:RHELDOCS-18700[1]
The Podman v5.0 deprecations
In RHEL 10.0 Beta, the following is deprecated in Podman v5.0:
-
The system connections and farm information stored in the
containers.conffile are now read-only. The system connections and farm information will now be stored in thepodman.connections.jsonfile, managed only by Podman. Podman continues to support the old configuration options such as[engine.service_destinations]and the[farms]section. You can still add connections or farms manually if needed; however, it is not possible to delete a connection from thecontainers.conffile with thepodman system connection rmcommand. -
The
slirp4netnsnetwork mode is deprecated and will be removed in a future major release of RHEL. Thepastanetwork mode is the default network mode for rootless containers. The
containernetworking-pluginspackage and the CNI network stack are no longer supported.-
If you upgrade from the previous RHEL versions to RHEL 10.0 Beta or if you have a fresh installation of RHEL 10.0 Beta, the CNI is no longer available. As a result, you have to run the
podman rmi --all --forcecommand to remove all images and containers that are using those images. -
If present, the
cnivalue in the containers.conf file for thenetwork_backendoption must be changed tonetavarkor can be unset.
-
If you upgrade from the previous RHEL versions to RHEL 10.0 Beta or if you have a fresh installation of RHEL 10.0 Beta, the CNI is no longer available. As a result, you have to run the
11.9. Deprecated packages
This section lists packages that have been deprecated and will probably not be included in a future major release of Red Hat Enterprise Linux.
The support status of deprecated packages remains unchanged within RHEL 10.
The following packages have been deprecated in RHEL 10:
- daxio
- gvisor-tap-vsock-gvforwarder
- libpmem
- libpmem2
- libpmemblk
- libpmemlog
- libpmemobj
- libpmemobj-cpp
- libpmempool
- libslirp
- nvml
- pmempool
- pmreorder
- wget
