Storage

Storage

Processes only get locally persistent storage

Why should containers work differently?

Containers are even worse by default

–

Non-persistent data

Enter container:

docker run -it --workdir /src ubuntu

Inside container:

touch file.txt
ls -l
exit

Look for file in new instance:

docker run -it --workdir /src ubuntu

It’s gone!

–

Locally persistent storage

Enter container with bind mount:

docker run -it --volume $PWD:/src --workdir /src ubuntu

Create file:

touch file.txt
ls –l
exit

Look for file in new instance:

docker run -it --volume $PWD:/src --workdir /src ubuntu

It’s alive!

–

Persistent storage

Hard problem even for green field

NFS shares are a good option

Docker storage plugins connect to storage backends