MW OS support details

Introduction

From the Dec 2021 GDB summary presentation:

• RHEL, CentOS Stream and 100% Enterprise Linux Clones (ELCs) should be treated equally
• WLCG sites should plan migrations before 7 EOL (mid 2024)
  • From 7 to 9 seems promising during the period 2H 2022-2023 subject to middleware availability
  • CS9 already available, RHEL/ELC 9s also or coming soon
  • 8 may also be used already as needed for hardware compatibility or functionality

MW product teams can use any EL9-compatible distribution → collectively captured as EL9 (or CS9 in some places).

New in 2023:

• CS is no longer favored, but can still be used
• AlmaLinux (AL) and Rocky Linux (RL) are mature, equivalent RHEL clones

ETA timelines and support levels

The EL9 timelines and EL8 support levels for relevant MW are being collected here,
which serves as input for the information on this page.

Product	EL9 ETA	EL8 support	Notes
Singularity	→	→	superseded by Apptainer
HTCondor	available	2022 Q2, supported
perfSONAR	available	2023 Q2	as of v5.0
HTCondor CE	available	available
GridSite	available in EPEL 9	available in EPEL 8	PT wants to discuss EOL
edg-mkgridmap	available in WLCG repo	available in EPEL 8 and WLCG repo	supported
BDII	2022 Q4	Available, currently unsupported
FTS	April-May 2024	best effort
Globus, MyProxy et al	available, best effort	best effort	EPEL
XRootD	Available, best effort	Best effort	EPEL
APEL client	available from the WLCG repository since 15 May 2024	ditto
UI			UMD meta package
WN			UMD meta package
VOBOX	Available	Not (yet) supported
Argus	Not planned	Not supported
DPM	Not supported	Not supported	EOL mid 2024
IAM	2022 Q3	Not supported	TBC
StoRM	2024 Q2	Not supported	not yet available
VOMS(-Admin) service	Not supported	Not supported	superseded by IAM and EGI Check-in
VOMS client	available	Not supported, but available
LCAS & LCMAPS	LCMAPS in EPEL 9 since March 20	Security fixes, rest best effort
ARC-CE	Q1 2022	Supported	EPEL, NorduGrid repo CS9 supported as of April 2022
CVMFS	Supported	Supported
Data management clients	2022 Q2	Supported	EPEL
dCache	Supported	Supported	The rpm packages are not distro specific (systemd, java11)
EOS	available	Supported
Frontier-Squid	2022 Q2	Supported
Apptainer	Exists in EPEL9, should be OK	works OK