Greetings,
Ok, I just updated the docker containers that are running my Mailman 3
installation over the weekend. mailman-core is now 3.3.10, with mailman-ngnix
at 1.28.0, mailman-postfix at 3.10.5-r0 and mailman-django-uwsgi at "latest".
I think I have got everything working normally — messages seem to be processed
correctly, and I can access the web pages on the web interface. And I have
updated various scripts to use --run-as-root until I can get around to
reconfiguring mailman-core to use a non-root user.
Anyway, since that time, the EC2 instance that the containers are running on
becomes "unreachable", to use AWS's parlance. I can restore functionality by
rebooting the instance. According to AWS, this is an application or operating
system issue, not their instance. Which means auto-recovery doesn't get
activated.
This always happens overnight, usually after midnight, though one time it was
around 10:40. I don't see any crontab entries that correlate. And the after
midnight issues don't always happen at the same time, so it seemed unlikely
that it was a crontab job that was causing it
I finally looked at the host (rather than the logs of each container) and
realized that the oom-killer was killing django-admin. As a temporary
workaround, I've limited memory on the mailman-django-uwsgi container to 4 GiB
(though, since I just did that this morning, I won't know until after midnight
(presumably) if it worked or not), and set the RestartPolicy to always.
I'm thinking that this points to a memory leak or some kind?
I did have to add a bunch of packages to my Dockerfile when I rebuilt the
container, since the last build was like 5 years ago, so I suppose it could be
that django is just using more memory than it used to, though at the moment, I
see that it is around 1 GiB:
FROM python:3.12-alpine3.22
RUN apk update && apk add --no-cache --virtual build-deps \
cargo gcc libffi-dev musl-dev && \
apk add --no-cache gettext postgresql-dev sassc build-base
pcre-dev python3-dev libc-dev linux-headers && \
pip install --upgrade pip setuptools wheel && \
pip --no-cache-dir install django-haystack==3.3.0
hyperkitty==1.3.12 \
postorius==1.3.13 psycopg2 uwsgi==2.0.25 whoosh && \
apk update && apk del --no-cache build-deps
WORKDIR /opt/mailman/mailman-suite/mailman-suite_project
USER mail
EXPOSE 8000
CMD ["uwsgi", "--ini", "uwsgi.ini"]
Any insights, ideas or assistance would be appreciated.
Thanks!
Pat Hirayama
Pronouns: he/him/his
Systems Engineer
IT | Systems Engineering - Infrastructure
Fred Hutch Cancer Center
O 206.667.4856
[email protected]<mailto:[email protected]>
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