One method for running QEMU is to run it on an NFS server. This is useful when you need to access the same file system from both the build and the emulated system at the same time. It is also worth noting that the system does not need root privileges to run. It uses a user space NFS server to avoid that. Follow these steps to set up for running QEMU using an NFS server.
Extract a Root Filesystem:
Once you are able to run QEMU in your environment, you can
use the runqemu-extract-sdk
script,
which is located in the scripts
directory along with the runqemu
script.
The runqemu-extract-sdk
takes a
root filesystem tarball and extracts it into a location
that you specify.
Here is an example that takes a file system and
extracts it to a directory named
test-nfs
:
runqemu-extract-sdk ./tmp/deploy/images/qemux86/core-image-sato-qemux86.tar.bz2 test-nfs
Start QEMU:
Once you have extracted the file system, you can run
runqemu
normally with the additional
location of the file system.
You can then also make changes to the files within
./test-nfs
and see those changes
appear in the image in real time.
Here is an example using the qemux86
image:
runqemu qemux86 ./test-nfs
Should you need to start, stop, or restart the NFS share, you can use the following commands:
The following command starts the NFS share:
runqemu-export-rootfs start file-system-location
The following command stops the NFS share:
runqemu-export-rootfs stop file-system-location
The following command restarts the NFS share:
runqemu-export-rootfs restart file-system-location