EOS DevOps Meeting

Tuesday 29 Aug 2017, 16:00 → 17:45 Europe/Zurich

513/R-068 (CERN)

Jan Iven (CERN)

Weekly meeting to discuss progress on EOS rollout

1 overall 2017 planning

Speaker: Jan Iven (CERN)

Things to announce/update for ITUM-22 (Mon Oct 2; input before Sept 11)?

• FUSEng "pilot"
• AFS phaseout status (i.e EOS new namespace rollout plan)

 

operations: production

2 production instances

Speaker: Herve Rousseau (CERN)

Still see ".xsmap" error (in "critical EOS error"-mail) - OK to run cleanup campaigns, or still waiting for FST updates?

• EOSATLAS - 2017-08-29
• EOSUSER, EOSCMS - 2017-08-26

Needs MGM 0.3.267 (which is not anywhere on production)

---

"dedicated Kerberos5 principal" (EOS-1234): rolled out on EOSPUBLIC (and EOSPPS) - other instances?

• add to "qa" for all instances

---

 

3 CERNBOX and EOSUSER

Speaker: Luca Mascetti (CERN)

Waiting fro new 0.3.267+1 tagged release.

master+slave probe discovered that file changelog can be followed, but not directory (probe-internal error - maybe remove recycle bin).

Still see various tpc "xrdcp" errors (6 different?). Followup: will go to logs, then create tickets. Also, EOS "tpc" works differently from plain standard Xrootd TPC - apparently has compiled-in "tpc" command, not using the config file directive.

4 FUSE and client versions

Speaker: Dan van der Ster (CERN)

4.1.27 got tagged (fixes mem leak), but fails to build on KOJI - SLC6/i386 (in some unrelated area). Builds OK on Jenkins, though.

5 Citrine rollout

Speaker: Herve Rousseau (CERN)

EOSPUBLIC & EOSLHCB

Updated to 4.1.27 to fix various issues (file deletion, compaction crash and built-in HTTP server IPv6 support)

EOSALICE

Proposed next TS to upgrade to Citrine, expected downtime ~4h

6 SWAN

Speaker: Jakub Moscicki (CERN)

reported three more "eosd" crashes on SWAN, with 4.1.18 (but might be duplicates).

development: near-term

7 nextgen FUSE

Speaker: Andreas Joachim Peters (CERN)

8 new Namespace

Speaker: Elvin Alin Sindrilaru (CERN)

other: pilot services, long-term dev, external

9 Webservice

Speaker: Luca Mascetti (CERN)

10 Backup

Speaker: Luca Mascetti (CERN)

11 Samba

Speaker: Luca Mascetti (CERN)

12 $HOME structure

Speaker: Luca Mascetti (CERN)

AFS removal (Massimo's test)

ml001 had ~ and a work dir. Remove AFS as service.

• As agreed PWD becomes "/"
• ~ seems to be unreachable, while the workdir seems to be gone.
• ubackup dir is also gone immediately
• afs restore seems to work (both ~ and work)

 

===

Log-in after AFS opt out

-bash-4.1$ ssh -l ml001 lxplus
Warning: Permanently added the RSA host key for IP address '188.184.93.168' to the list of known hosts.
Password:
* ********************************************************************
* Welcome to lxplus069.cern.ch, SLC, 6.9
* Archive of news is available in /etc/motd-archive
* Reminder: You have agreed to comply with the CERN computing rules
* https://cern.ch/ComputingRules
* Puppet environment: production, Roger state: production
* Foreman hostgroup: lxplus/nodes/login
* LXPLUS Public Login Service
* ********************************************************************
-bash-4.1$ df
Filesystem         1K-blocks          Used     Available Use% Mounted on
/dev/vda1           82533532      55440472      22903508  71% /
tmpfs               15041868            64      15041804   1% /dev/shm
/dev/vdb           154687468     101795652      45027496  70% /tmp
/dev/vdb           154687468     101795652      45027496  70% /var/tmp
sssd                  307200         82352        224848  27% /var/lib/sss/db
AFS                  9000000             0       9000000   0% /afs
cvmfs2              30720000      28997235       1722766  95% /cvmfs/atlas.cern.ch
cvmfs2              30720000      28997235       1722766  95% /cvmfs/cms.cern.ch
eosatlas        128000000000             0  128000000000   0% /eos/atlas
cvmfs2              30720000      28997235       1722766  95% /cvmfs/lhcb.cern.ch
eosuser        3475066307484 1954339025428 1520727282056  57% /eos/user
cvmfs2              30720000      28997235       1722766  95% /cvmfs/sft.cern.ch
cvmfs2              30720000      28997235       1722766  95% /cvmfs/ganga.cern.ch
cvmfs2              30720000      28997235       1722766  95% /cvmfs/clicdp.cern.ch
cvmfs2              30720000      28997235       1722766  95% /cvmfs/atlas-nightlies.cern.ch
eoscms          128000000000             0  128000000000   0% /eos/cms
cvmfs2              30720000      28997235       1722766  95% /cvmfs/alice.cern.ch
-bash-4.1$ pwd
/
-bash-4.1$ ls -l /afs/cern.ch/user/m/ml001
ls: cannot open directory /afs/cern.ch/user/m/ml001: Permission denied
-bash-4.1$ ls -l /afs/cern.ch/work/m/ml001
ls: cannot access /afs/cern.ch/work/m/ml001: No such file or directory

 

===

Backup-restore output (incomplete)

-bash-4.1$  afs_admin recover /afs/cern.ch/user/m/ml001
RECOVERING VOLUME:Y.user.ml001
2017-08-29 15:17:01,872 INFO    : Starting restore session... logfile /var/ABS/log/abs-restore-session.2017.08.29-151701/abs-restore.log
   0:    2017-03-06 18:48:10 (f)
   1:    2017-04-20 18:53:34 (f)
   2:    2017-06-04 18:43:50 (f)
   3:    2017-07-19 19:08:17 (f)
   4:    2017-08-07 19:00:03
   5:    2017-08-16 18:30:14
choose dump (number); or 'm' for more, possibly older dumps (if any); or '^C' to interrupt >5
2017-08-29 15:17:06,403 INFO    : Restoring volume 1934841534 at 2017-08-16 18:30:14, recalling 3 dumps
2017-08-29 15:17:06,509 WARNING : stderr:     **** : trace level set to 3
    stager: stage_prepareToGet Usertag=NULL
    stager: Looking up RH host - Using castorpublic
    stager: Looking up RH port - Using 9002
    stager: Looking up service class - Using backup
    stager: stage_prepareToGet file=/castor/cern.ch/afsback/DUMPS/44/24/1934841534/voldump:v.1934841534:n.user.ml001:b.2017.07.19-190817:p.0:e.gzip.aes-v2:i.2017.07.19-190817:.gz.aes-v2/ proto=rfio
    stager: Setting euid: 49089
    stager: Setting egid: 2766
    stager: Localhost is: afs901.cern.ch
    stager: Creating socket for castor callback - Using port 30042
    stager: Aug 29 15:17:06 (1504012626) Sending request
    stager: 4b07de86-4484-45b4-939b-8a734d8e9572 SND 0.01 s to send the request
    stager: Waiting for callback from castor
    stager: 4b07de86-4484-45b4-939b-8a734d8e9572 CBK 0.02 s before callback from 188.184.38.4 was received
Received 1 responses
/castor/cern.ch/afsback/DUMPS/44/24/1934841534/voldump:v.1934841534:n.user.ml001:b.2017.07.19-190817:p.0:e.gzip.aes-v2:i.2017.07.19-190817:.gz.aes-v2/ SUBREQUEST_READY

2017-08-29 15:17:06,613 WARNING : stderr:     **** : trace level set to 3
    stager: stage_prepareToGet Usertag=NULL
    stager: Looking up RH host - Using castorpublic
    stager: Looking up RH port - Using 9002
    stager: Looking up service class - Using backup
    stager: stage_prepareToGet file=/castor/cern.ch/afsback/DUMPS/44/24/1934841534/voldump:v.1934841534:n.user.ml001:b.2017.08.07-190003:p.2017.07.19-190817:e.gzip.aes-v2:i.2017.07.19-190817:.gz.aes-v2/ proto=rfio
    stager: Setting euid: 49089
    stager: Setting egid: 2766
    stager: Localhost is: afs901.cern.ch
    stager: Creating socket for castor callback - Using port 30927
    stager: Aug 29 15:17:06 (1504012626) Sending request
    stager: 35ea97f1-5ca7-4551-9748-0959ea22e00e SND 0.01 s to send the request
    stager: Waiting for callback from castor
    stager: 35ea97f1-5ca7-4551-9748-0959ea22e00e CBK 0.02 s before callback from 188.184.38.4 was received
Received 1 responses
/castor/cern.ch/afsback/DUMPS/44/24/1934841534/voldump:v.1934841534:n.user.ml001:b.2017.08.07-190003:p.2017.07.19-190817:e.gzip.aes-v2:i.2017.07.19-190817:.gz.aes-v2/ SUBREQUEST_READY

2017-08-29 15:17:06,718 WARNING : stderr:     **** : trace level set to 3
    stager: stage_prepareToGet Usertag=NULL
    stager: Looking up RH host - Using castorpublic
    stager: Looking up RH port - Using 9002
    stager: Looking up service class - Using backup
    stager: stage_prepareToGet file=/castor/cern.ch/afsback/DUMPS/44/24/1934841534/voldump:v.1934841534:n.user.ml001:b.2017.08.16-183014:p.2017.08.07-190003:e.gzip.aes-v2:i.2017.07.19-190817:.gz.aes-v2/ proto=rfio
    stager: Setting euid: 49089
    stager: Setting egid: 2766
    stager: Localhost is: afs901.cern.ch
    stager: Creating socket for castor callback - Using port 30890
    stager: Aug 29 15:17:06 (1504012626) Sending request
    stager: c374db3c-e340-4ccf-b9c1-d1547780029d SND 0.02 s to send the request
    stager: Waiting for callback from castor
    stager: c374db3c-e340-4ccf-b9c1-d1547780029d CBK 0.03 s before callback from 128.142.37.40 was received
Received 1 responses
/castor/cern.ch/afsback/DUMPS/44/24/1934841534/voldump:v.1934841534:n.user.ml001:b.2017.08.16-183014:p.2017.08.07-190003:e.gzip.aes-v2:i.2017.07.19-190817:.gz.aes-v2/ SUBREQUEST_READY

 

 

13 BATCH integration

Speaker: Massimo Lamanna (CERN)

Test with version 4.1.26-1

Analysing dir: outputs
Expected data size 1024000 (10 datafiles per job)
Checking task 177588 (100 jobs)
Analysing task 177588 (100 jobs)

Task 177588 starts at Tue Aug 29 14:56:43 2017 and ends at Tue Aug 29 15:00:42 2017 (4.0 minutes)
Analysed jobs: 100
Correct jobs: 100
Maximum concurrency: 13
Execution hosts (top 5):  b62a5971fc [#4]  b6e6f35cfa [#4]  b64dda3533 [#4]  b6c077d1d1 [#4]  b6d86ab924 [#4] 
Execution environments (top 5): eos-client-4.1.26-1.el6.x86_64, eos-fuse-core-4.1.26-1.el6.x86_64, xrootd-client-libs-4.6.1-1.el6.i686, xrootd-client-libs-4.6.1-1.el6.x86_64 [#100]

14 Xrootd

Speaker: Michal Kamil Simon (CERN)

xrootd-4.7 has been released. Will come via standard repos.

Q: does this include the fix on client "maximum number of internal redirect" error reporting (reported to Elvin; might hide "real" error?). Probably not. Perhaps could get "backtrace" with all statuses (upstream ticket exists)?

15 AOB

Next week - somebody else to chair (or skip)?