Unable to set no-color log output

[Yong-Hwan Baek]

Hello

I am building a custom app using oslo.log running on apache httpd server. (We use olso to communicate with openstack services)
This app is deployed in kubernetes environment, so logs are collected through fluentd or like that.

In this situation every log prints ascii escape character(\x1b[00m) to reset terminal color.

Unfortunately, there is no way to remove or disable ascii escape character.
In configuration file setup process, every option fallbacks to ColorHandler.(https://opendev.org/openstack/oslo.log/src/commit/b5b8c30b0d925aa3d31b58932c94586631827b62/oslo_log/log.py#L365)

There are three handlers implemented (syslog, journal, color) but non of those can generate plain text without console color characters. (see. https://opendev.org/openstack/oslo.log/src/branch/master/oslo_log/handlers.py)

Could be a workaround to solve this issue?

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/oslo.log/+/914791

[Takashi Kajinami (kajinamit)]

This is considered a new feature rather than bug fix. We can add a new option but this is not backportable.

One potential workaround is using json format logs, or somehow drop the color tags before/after the logs are processed by fluenntd.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/oslo.log/+/914791
Committed: https://opendev.org/openstack/oslo.log/commit/cdda78eab09e46f82ef6c156d645c570f408c3eb
Submitter: "Zuul (22348)"
Branch: master

commit cdda78eab09e46f82ef6c156d645c570f408c3eb
Author: Takashi Kajinami <email address hidden>
Date: Sun Mar 31 03:17:18 2024 +0900

    Add option to disable color

    Introduce an option to disable color keys which are set according to
    log levels, so that the log sent to stdout/stderr is more machine
    readable.

    Closes-Bug: #2038917
    Change-Id: I7966d4f4977b267f620946de4a5509f53b043652