Mark LeMoine's questions

I'm trying to automate some of my personal server setup using Ansible, in order to wipe my disk clean and migrate to Ubuntu 20.04. Part of this process is installing the SSH keys I use for Github access.

The SSH public/secret keys are stored in pass, and I'm able to get those copied over to ~/.ssh/github.pub and ~/.ssh/github just fine. But at this point I'm stuck: if I were doing this by hand, I'd run eval $(ssh-agent -s) to set environment variables, and then run ssh-add ~/.ssh/github. I'm not sure how to accomplish this with Ansible. Searching for Ansible and anything involving SSH produces a lot of results with setting up remote access for Ansible to run on external hosts, and doesn't seem like it'd help in this use case.

I've inherited a large MongoDB server at work, and have been tasked with figuring out why queries run against it are so slow. The DB contains tons and tons of records (on the order of 10^9) and takes up about 300 GiB. At first, I thought that the raw number of records may have been the culprit, so I set up indices on appropriate fields. It helped greatly for queries that were searching for criteria that was in the DB, but would take anywhere from 80-90 minutes for queries where there would be no matches. Any ideas on how to tackle this?