THREESCALE-14619: Remove the invalid default value for CONFIG_LOG_PATH

[mayorova]

Fixes https://redhat.atlassian.net/browse/THREESCALE-14619

dev/stdout is an invalid log path. Removing the setting results in using other defaults for the log, and in OpenShift environment it defaults to STDOUT anyway, so we don't need to set the variable.

[akostadinov]

what will happen if we don't set this variable? Will it log to stdout by default? It is worth trying because this is how https://redhat.atlassian.net/browse/THREESCALE-12057 was fixed.

[mayorova]

Well, this is what the PR fixes - if the variable is NOT set, previously, the error from the description is printed.
With this updated default, the log seems to be printed to the stdout successfully. This is what the backend-cron pod log looks like when CONFIG_LOG_PATH=/dev/stdout is set on the pod explicitly:

fatal: not a git repository (or any of the parent directories): .git
fatal: not a git repository (or any of the parent directories): .git
fatal: not a git repository (or any of the parent directories): .git
I, [2026-04-22T07:49:17.829096 #21] INFO -- : Going to delete the stats keys for these services: ["5"]
I, [2026-04-22T07:49:17.832578 #21] INFO -- : Finished deleting the stats keys for these services: ["5"]
** Invoke reschedule_failed_jobs (first_time)
** Execute reschedule_failed_jobs
Rescheduled: 0. Failed and discarded: 0. Pending failed jobs: 0.
** Invoke stats:cleanup (first_time)
** Execute stats:cleanup
fatal: not a git repository (or any of the parent directories): .git
** Invoke reschedule_failed_jobs (first_time)
** Execute reschedule_failed_jobs
Rescheduled: 0. Failed and discarded: 0. Pending failed jobs: 0.
fatal: not a git repository (or any of the parent directories): .git
** Invoke reschedule_failed_jobs (first_time)
** Execute reschedule_failed_jobs
Rescheduled: 0. Failed and discarded: 0. Pending failed jobs: 0.

[akostadinov]

previously it was not unset but it was set to dev/stdout which expectedly cannot be found.

[akostadinov]

Errno::ENOENT: No such file or directory @ rb_file_s_stat - dev/stdout (Errno::ENOENT)

This means it cannot find dev/stdout.

[jlledom]

I think the change is not wrong. According to this:

apisonator/lib/3scale/backend/configuration.rb

Lines 99 to 113 in 58baa5c

	# often we don't have a log_file setting - generate it here from
	# the log_path setting.
	log_file = config.log_file
	if !log_file || log_file.empty?
	log_path = config.log_path
	config.log_file = if log_path && !log_path.empty?
	if File.stat(log_path).ftype == 'directory'
	"#{log_path}/backend_logger.log"
	else
	log_path
	end
	else
	ENV['CONFIG_LOG_FILE'] || STDOUT
	end
	end

This change would end up actually logging to /dev/stdout. I think removing the whole line would lead to the same result anyway, but I don't have the energy to test it and confirm it right now. IMO we should just merge this, fix the immediate problem and maybe review the whole logging system later on.

[akostadinov]

Ok, I prefer not to have redundant settings in there. Also the variable doesn't seem to be used as intended as a PATH. But not super strong opinion. You can merge as you like it.

[mayorova]

@akostadinov is right, not setting the env var has the same effect - STDOUT is picked by default.