Step 3: Consider data

- [Instructor] Step three is considered the data.…So what's important here?…Data needs to be persisted in Docker…for most applications.…So we have to figure out a mechanism in a way…in which you're going to store the data,…or else the data won't exist…after the container is shut down.…Or you could leverage a third-party tool.…So they're other tools that are on the market…that are databases for Docker,…and you can certainly leverage those,…or you can leverage what's needed…to the Docker standard in Docker product.…

So why data?…Well containers are only short-term…and once a container is removed, it is gone.…So if you want your application running inside the container…to write to something, files or data, that ensures the data…will still be present, you're going to have to figure out…some kind of a data retention,…or data persistence kind of mechanism.…Fortunately there's a few to choose from.…So the types of Docker data volumes.…One, is keeping your data persistent…even though the container gets restarted.…So we basically just write directly to the system…