How to modify Apache tuning parameters?

[ricxsar]

I'm creating my custom Dockerfile based on the official image for personal use case. I need to modify some parameters (from this page) for tuning purposes.

How should I do it?

I have noticed this line which modifies the logging format. Maybe we can do the same.

[wglambert]

I think you pick an mpm module from here https://httpd.apache.org/docs/2.4/mpm.html and then edit it

At the user level, MPMs appear much like other Apache httpd modules. The main difference is that one and only one MPM must be loaded into the server at any time.

You could also try asking over at the Docker Community Forums, Docker Community Slack, or Stack Overflow. Since these repos aren't really a user-help forum

[ricxsar]

Thank you for responding. I'm using the same Apache base image, Prefork i believe.
I am aware of editing some configuration but I not familiar with linux commands to do the job at the docker image level. Eg. MaxConnectionsPerChild is defaulted to zero. Documentation says:

Setting MaxConnectionsPerChild to a non-zero value limits the amount of memory that process can consume by (accidental) memory leakage.

Reference: https://httpd.apache.org/docs/2.4/mod/mpm_common.html#maxconnectionsperchild

Do you have any plans on creating image for different MPM modules?

I will try to ask on the suggested websites.

[yosifkit]

Since the apache variant is based on the php:[version]-apache image, you can use the Docker Hub docs for php. So, either edit or add conf files somewhere in /etc/apache2/, just like a regular Debian install.

[ricxsar]

I was able to solve it myself adding:

RUN set -eux; \
# see https://aws.amazon.com/premiumsupport/knowledge-center/504-error-classic/
	{ \
		echo 'AcceptFilter http none'; \
		echo 'AcceptFilter https none'; \
	} > /etc/apache2/conf-available/disable-tcp-accept-defer.conf; \
	a2enconf disable-tcp-accept-defer;

RUN set -eux; \
	sed -i 's|KeepAliveTimeout 5|KeepAliveTimeout 95|' /etc/apache2/apache2.conf;

Which modifies the setting for the AWS ALB to be happy.

[wglambert]

Cool glad you got it figured out, gonna close the issue then since it's resolved

If you had other questions about using the images you could also try asking over at the Docker Community Forums, Docker Community Slack, or Stack Overflow. You'd probably get more people looking at your question