2023-04-06 Meeting Notes

Date

Apr 6, 2023

Participants

@James Walder
@Thomas, Jyothish (STFC,RAL,SC)
@Thomas Byrne
@Emmanuel Bejide
Lancs: Matt, Steven
Glasgow: Sam

Goals

List of Epics
New tickets
Consider new functionality / items
Detailed discussion of important topics
Site report activity

Discussion topics

Current status of Echo Gateways / WNs testing

dev-gw1	dev-gw2	dev-gw3	dev-gw4

dev-gw1	dev-gw2	dev-gw3	dev-gw4
multistream	alice-test	rgw deployment test	token testing

gw1	gw2	gw3	gw4	gw5	gw6	gw7	gw8

gw1	gw2	gw3	gw4	gw5	gw6	gw7	gw8
xrd554	checksum	SKA	prod	prod	prod	xrd554	CMSD

gw10	gw11	gw12	gw13	gw14	gw15	gw16

gw10	gw11	gw12	gw13	gw14	gw15	gw16
xrd554	xrd554	prod	prod	CMSD	prod	prod

Batch farm WN	Use

Batch farm WN	Use
lcg2269-2270	Vread
lcg2268	Xrd553

Recent sandbox’s for review / deployments:

Item	Presenter	Notes

Item	Presenter	Notes
XrootD 5.5.4 testing		link ssl read errors still happening, but gws in sandbox have been stable during high traffic times. Socket connections are closing better (seeing more socket errors being handled from client sigterm) compared to host in 5.5.0
Tokens testing	JW	Following XRootD workshop; can now restrict a VO to it’s own path / pool. todo: discuss how to move towards production.
Status of space reporting and tests on Alice dev gateway and setting up of a unified configuration.		https://stfc.atlassian.net/browse/XRD-21 Are we done ? Updated https://stfc.atlassian.net/browse/XRD-21 to reflect the current status. We have sign-off from ALICE and handover to operations for updating figures. Code needs merging.
CMSD status		https://stfc.atlassian.net/browse/XRD-41 CC document https://stfc.atlassian.net/wiki/spaces/GRIDPP/pages/136446019/High-level+XrootD+redirection+for+Echo?focusedCommentId=136118425 https://helpdesk.gridpp.rl.ac.uk/Ticket/Display.html?id=481645 https://helpdesk.gridpp.rl.ac.uk/Ticket/Display.html?id=481665 echo-manager{01,02} re-iped to OPN, but wrong IPv6 addresses given to the alias - being corrected. - final SAN ? Keep with the original planned rdr echo address ?
Vector Read		https://stfc.atlassian.net/wiki/spaces/GRIDPP/pages/137265343/Non-striper+read+v+implementation+for+WN+s+xrootd+gateways Two nodes for testing; needs Grid services to enable more. These nodes have a high failure rate, as XrdSecGSISRVNAMES is removed on them currently (see below) Code review in progress; consideration for sparse files needed.
XrdSecGSISRVNAMES on WNs		Secgsi warning because of XrdSecGSISRVNAMES variable `XrdSecGSISRVNAMES=lcg2622.gridpp.rl.ac.uk` XrdSecGSISRVNAMES is set on the WNs (and as a Singularity bound variable) to allow old 4.8.X clients to authenticate against the WN xrootd server (which it thinks is webdav.echo.stfc.ac.uk). This triggers a warning “secgsi: proxy delegation forbidden when trusting DNS to resolve 'eoslhcb.cern.ch'!” Removal of the variable not possible as user analysis workflows have this embedded within it.