I use it to grade homeworks, no more open TCP sockets, message queues, open files, some naughties trying to delete my home.
Ask HN: How do you use Docker in production?
121–130 of 157 posts
Re: Ask HN: How do you use Docker in production?
#122Not technically in production yet, but I use Docker for the following scenarios: - Build agents for TeamCity, this was one of the first scenarios and it's been amazingly helpful so far. - Building third-party binaries in a reproducible environment - Running bioinformatics pipelines in consistent environments (using the above tools) - Circumventing the painfully inept IT department to give people in my group easy acce…
> - Build agents for TeamCity, this was one of the first scenarios and it's been amazingly helpful so far. Can you expand on what you've done with them and how it's been helpful?
The image basically contains (on top of the TeamCity agent itself of course) all the required dependencies. These dependencies are built in exactly the same way (and in the same context) as the ones used for running the code itself (i.e. after building/testing). This basically ensures that the code consistently runs in the same conditions.
Using Docker for this also means I can roll out the agents rather painlessly across a variety of machines. For instance, we have some pretty serious hardware used for HPC and similar stuff, so whenever possible I like running builds on that, since it takes a fraction of the time it would on the more common hardware. Sometimes however those machines aren't available for a number of different reasons, so I can very quickly move my build agents to another machine, or better even, multiple machines.
Re: Ask HN: How do you use Docker in production?
#123Here's the problems we're solving with Docker: * Sanity in our environments. We know exactly what goes into each and every environment, which are specialized based on the one-app-per-container principle. No more asking "why does software X build/execute on machine A and not machines B-C?" * Declarative deployments. Using Docker, Core OS, and fleet[1], this is the closest solution I've found to the dream of specifying…
I'd recommend you guys look into Stackage to relieve some of the cabal hell pain, if not most of it.
Re: Ask HN: How do you use Docker in production?
#124Docker, CoreOS, fleet, and etcd have completely changed how I build projects. It's made me much more productive. I'm working on Strata, which is a building management & commissioning system for property owners of high-rise smart buildings. It's currently deployed in a single building in downtown Toronto, and it's pulling in data from thousands of devices, and presenting it in real-time via an API and a dashboard. So…
> They advertise themselves into etcd, and any dependencies are pulled from etcd. That means that the Django app gets the addresses for the PostgreSQL and Redis servers from etcd, and connects that way. If these values change, each container restarts itself as needed.
Could you explain a bit more how that works?
Re: Ask HN: How do you use Docker in production?
#125I'm really interested in using Docker but I'm having trouble understanding how to manage stateful applications, like databases.
Re: Ask HN: How do you use Docker in production?
#126I'm really interested in using Docker but I'm having trouble understanding how to manage stateful applications, like databases.
There are two ways:
1. You run the db and its files inside a container and regularly export a DB dump like so (example for postgres):
docker run --volumes-from db -v $(pwd):/backup ubuntu:trusty sh -c "cd /var/lib && tar zcvf /backup/backup.tgz postgresql"
(I don't recommend this)
2. You run the db inside a docker container and mount a volume for /var/lib/postgresql into docker. This I find is the best way. the db files remain on your host and you can easily maintain the DB (runtime) and files separately.
Adjust to whatever DB you're using.
Re: Ask HN: How do you use Docker in production?
#127At Shopify, we have moved to Docker for deploying our main product. Primary advantages for us are faster deploys, because we can do part of the old deploy process as part of the container build. Secondly: easier scalability, because we can add additional containers to have more app servers or job workers. More info at http://www.shopify.com/technology/15563928-building-an-inter...
8k req/sec on so much hardware? Is it a mistake? Maybe 80k at least?
Re: Ask HN: How do you use Docker in production?
#128We use Docker to deploy on Aptible, and this makes our projects entirely self-contained. With a Dockerfile in the project directory, the entire build and runtime environment is now explicitly declared. With "git push aptible", we push the code to the production server, rebuild the project, and run it in one command.
Can you elaborate on the middle bits? How do you go from 'git push aptible' to the actual execution of the docker commands on the production server? (Setting up something similar myself and would love some direction).
You can use a git post-receive hook. See here for a similar example:
https://github.com/nathanleclaire/laraveldocker/blob/master/...
Re: Ask HN: How do you use Docker in production?
#129How do you make a database run on multiple containers and get redundancy with something like postgresql?
Re: Ask HN: How do you use Docker in production?
#130Docker, CoreOS, fleet, and etcd have completely changed how I build projects. It's made me much more productive. I'm working on Strata, which is a building management & commissioning system for property owners of high-rise smart buildings. It's currently deployed in a single building in downtown Toronto, and it's pulling in data from thousands of devices, and presenting it in real-time via an API and a dashboard. So…
Does Strata have a website?