Disk space available within a docker image is less than the space available in the VM

[vasantivmahajan]

I am running a docker image on a windows system. The Virtual Machine on which it is running has 244 GB of memory allocated

However, on checking the disk space in the docker container it shows only 19GB available

Why is the 244GB memory not available within the container?

Any help is appreciated!

[yosifkit]

Does it show the same limit when doing the df in docker-machine ssh default? It could be just a limitation if you are using devicemapper as the storage driver.

If you resized the default disk with VirtualBox, then you'd also need to go in the Linux VM and use something like a gparted live iso to go in and resize the partition and filesystem. If you have nothing important on the VM you could just delete it with docker-machine rm default and then docker-machine create with your desired value in --virtualbox-disk-size.