Saturday, June 27, 2015

Automatically Remove Long-Running Docker Containers

The following can be used in cron or run with & at the end of the command:


I found this didn't work: http://www.ahtik.com/blog/removing-detached-docker-containers-automatically/

Tuesday, June 2, 2015

Docker Run In Crontab

"0 5 * * 1 docker run --rm --name=mycontainer ubuntu:13.10 /opt/bin/job"
The above command is an example of how "docker run" would be used in crontab to run once every week at 5am.

  • --rm will delete the container once the job is finished running
  • --name will name the container and prevent duplicate jobs from running
  • You don't need to use "&" at the end, because crons already run in the background.

Friday, May 8, 2015

MySQL Batch Updates Not Working

Looking at "SHOW PROCESSLIST" and it looks like your queries are running individually instead of in batches like you sent?

This happens because MySQL runs each update statement individually, but you should still be able to see the batches when the queries are in the "init" state.

Use this query to see the batched queries:
SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST where state="init";

Sunday, March 22, 2015

Thursday, February 12, 2015

"Error response from daemon: 404 page not found" - Docker

This required setting the following in my /etc/environment:
no_proxy=/var/run/docker.sock

Wednesday, January 28, 2015

When Not to Use Generator Expressions

http://stackoverflow.com/a/26635939

I found that post very helpful. I didn't know it's a better idea to use a list comprehension rather than a generator expression for "".join().

mod_wsgi + Flask

Here's my mod_wsgi configuration for a flask app that uses Flask-Admin.

Trailing slashes matter! If you set a trailing slash, it will only set the alias for that directory and not all of the directories below it.