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[database]: Fix "program:redisprogram:redis_bmp" ERR from supervisor … #20897

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@wdoekes wdoekes commented Nov 22, 2024

Why I did it

Backport of 4807ac5 for 202405.

The problem isn't there yet, but this fix is correct. And the problem might crop up once someone starts using two DBs.

Original issue

Issue: #20636
PR-for-master: #20726

@FengPan-Frank can you merge this one as well?

…onic-net#20726)

== Why I did it ==

Commit 06c469e added an extra redis instance. This resulted in a
two item string without linefeeds in /etc/supervisor/critical_processes:

  program:redisprogram:redis_bmp

That resulted in an error in syslog and docker-database failing.

== Work item tracking ==

ERR database#supervisor-proc-exit-listener: Syntax of the line
  program:redisprogram:redis_bmp#012 in processes file is incorrect.
  Exiting... (sonic-net#20636)

#17

== How I did it ==

Replace the jinja2 whitespace eating hyphens from BOL to EOL.

Note that j2 and the jinja2 parser in sonig-cfggen do not behave the
same. The sonig-cfggen is the relevant one.

Before:

  $ j2 ./dockers/docker-database/critical_processes.j2.old -f json \
      <<< '{"INSTANCES":{"foo":"bar","baz":"..."}}'
  |
  |
  program:foo
  program:baz

  # docker exec database sonic-cfggen \
      -j /var/run/redis/sonic-db/database_config.json \
      -t /usr/share/sonic/templates/critical_processes.j2.old
  program:redisprogram:redis_bmp

After:

  $ j2 ./dockers/docker-database/critical_processes.j2 -f json \
      <<< '{"INSTANCES":{"foo":"bar","baz":"..."}}'
  program:foo
  program:baz

  # docker exec database sonic-cfggen \
      -j /var/run/redis/sonic-db/database_config.json \
      -t /usr/share/sonic/templates/critical_processes.j2
  program:redis
  program:redis_bmp
  |

After this fix, the output in /etc/supervisor/critical_processes is
correct and the error from docker-database is gone.
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@FengPan-Frank FengPan-Frank left a comment

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I remember we only need to add a label to backport.
btw, I'm not sure if we have real multiple redis instance use case for 202405, since redis_bmp was not in 202405.

@wdoekes
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wdoekes commented Nov 22, 2024

I remember we only need to add a label to backport.

Not sure what you mean. Do labels fix backports automatically? I have no permissions to add them either way.

btw, I'm not sure if we have real multiple redis instance use case for 202405, since redis_bmp was not in 202405

Indeed we don't. But someone might a second instance in their stable branch. And by merging this they won't run into this problem.

@FengPan-Frank
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I remember we only need to add a label to backport.

Not sure what you mean. Do labels fix backports automatically? I have no permissions to add them either way.

btw, I'm not sure if we have real multiple redis instance use case for 202405, since redis_bmp was not in 202405

Indeed we don't. But someone might a second instance in their stable branch. And by merging this they won't run into this problem.

OK, I've added label

@bingwang-ms
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/azp run Azure.sonic-buildimage

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Azure Pipelines successfully started running 1 pipeline(s).

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3 participants