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Kernel

Habilita net.ipv4.ping_group_range

Fedora 31 soporta ahora el parámetro de kernel net.ipv4.ping_group_range para todos los grupos de usuarios. Este cambio habilita a todos los usuarios a crear socket de Echo de Protocolo de Control de Mensaje de Internet (ICMP) sin usar los binarios setuid o teniedo los archivos de capacidades CAP_NET_ADMIN y CAP_NET_RAW.

Como resultado, los contenedores sin raíz podman son ahora capaces de usar la utilidad ping. Este cambio se aplica también a los usuarios desarrollando sobre la variante Fedora Silverblue, que usan contenedores creados a través de la utilidad toolbox.

No bootable images for i686 kernels

Fedora 31 no longer provides 32-bit kernels or bootable images for i686 systems. This change is a result of ever decreasing amount of users with 32-bit only hardware.

The kernel-headers package continues to exist in the i686 package.

Fedora now uses cgroups-v2 by default

Enablement of control groups version 2 (cgroups-v2) by default allows the system utilities to conveniently take advantage of new functionality and fixes this kernel feature brings.

Users have to update any tools or scripts they used for manual configuration of cgroups-v1 so that they reflect cgroups-v2 now. The tools or scripts should not require any changes, if they utilized the systemd interfaces.

Some container engines leak the control group hierarchy into containers. This could pose a problem for container images that expect to be running in a control group version 1 environment. This change is tied to the removal of the docker package in Fedora 31; see the Containers section for details.

To retain the old default of control groups version 1 (cgroups-v1), set the following kernel command line parameter:

`systemd.unified_cgroup_hierarchy=0`