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from mamba-factotum, run screen comment, then inside the screen session, ssh with tunnel to tpfe2 head node.

Basic use of screen

• https://tomlee.co/2011/10/gnu-screen-splitting/

• screen -ls

• screen -U -R -D pleiades<screen_id>

• screen -x pleiades <screen_id> # shared terminal

• to split screen: ctrl-a and then shift-s

• to detach screen: ctrl-a and then d

Troubleshooting

Problem(s):

• SSH tunnel is down

Signs(s):

• topsapp queues are stuck; jobs are not being unacked, but the queues are full

• nothing reported in mozart/figaro – job,topsapp,job-started

• Port checker shell script (in hysds-hec-utils repo) indicates that ports are not forwarded (all should give pass):

esi_sar@tpfe2:~/github/hysds-hec-utils> ./hysds_pcm_check_port_forwarded_tunnel_services.sh

[pass] mozart rabbitmq AMQP
[pass] mozart rabbitmq REST
[pass] mozart elasticsearch for figaro
[pass] mozart redis for ES figaro
[pass] mozart rest api
[pass] grq elasticsearch for tosca
[pass] grq http api
[pass] metrics redis for ES metrics
connect_to 100.67.33.56 port 25: failed.
# [fail] factotum smtp http://tpfe2.nas.nasa.gov:10025
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current 
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
curl: (52) Empty reply from server

Note that the mail server failed to respond. (That’s nominal. Mail service no longer used.) The output above indicates nominal status.

Remedy:

1. from mamba-factotum, open screen

   1. optionally, attach existing screen (32207, tagged pleiades)

2. ssh with tunnel to tpfe2 head node: ssh tpfe2-tunnel

   1. note the command is aliased: alias pleiades='ssh tpfe2-tunnel'

3. run sudo -u esi_sar /bin/bash

4. detach the screen (ctrl-a + d)

Auto-scaling job-workers singularity via PBS scripts

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Pleiades has allocated us a quota of 100 200 TB and 5000000 files. This script finds and deletes all files older than 3-days 2.1 days and under each of the group id worker directories.

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1. stop auto-scaling scripts

   1. https://github.com/hysds/hysds-hec-utils/blob/master/pbs_auto_scale_up.sh

2. revoke job type: job-request-s1gunw-topsapp-local-singularity:ARIA-446_singularity in mozart-figaro that are in running/queued states.

3. qdel all jobs

   1. https://github.com/hysds/hysds-hec-utils/blob/master/qdel_all.sh

      1. qstat -u esi_sar | awk '{ if ($8 == "R" || $8 == "Q") print "qdel "$1; }' | sh

4. then nuke all of the work dirs for the three group ids:

   1. /nobackupp12/esi_sar/s2037/worker/20202021/1102/**

   2. /nobackupp12/esi_sar/s2252/worker/20202021/1102/**

   3. /nobackupp12/esi_sar/s2310/worker/20202021/1102/**

5. retry all failed topsapp jobs / on-demand submit from runconfig-topsapp

6. start up auto scaling scripts