NFS server
Tested with the following operating systems
- Ubuntu 10.04 x86 in VMware Player
- Ubuntu 12.04 x86 in VMware Player
- Ubuntu 14.04 x86_64 in VMware Player
- Ubuntu 16.04 x86_64 in VMware Player
Installation
user@ubuntu:~$ sudo apt-get install nfs-kernel-server
Example Configuration for NFS boot
Create a directory on the host root filesystem.
user@ubuntu:~$ sudo mkdir /nfs user@ubuntu:~$ sudo chmod 777 /nfs
Extract the content of root.tgz to your nfs directory.
root.tgz is located in:
- BSP download archive provided by TQ-Systems e.g. (TQMxx.BSP.SW.BIN.xxxx.tgz\TQMxx.BSP.SW.BIN.xxxx.tar\root.tgz)
- After building the BSP sources with PTXdist e.g. (../TQMxx-BSP-REV.xxxx/platform-MBxx/images/root.tgz)
user@ubuntu:~$ cd /nfs user@ubuntu:~$ sudo tar -xvf ~/workspace/TQMaxx-BSP-REV.xxxx/platform-MBaxx/images/root.tgz
Next step is to configure the /etc/exports file.
Create an entry that contains the path to your nfs folder created above.
<path/to/your/nfs/directory> <permitted IPs>/<subnet>(<comma separated options>)
This path must match the U-Boot environment variable rootpath on the target and defines the source for the NFS rootfs.
After the /etc/exports file was modified the NFS server need to be restarted:
user@ubuntu:~$ sudo service nfs-kernel-server restart
Test the configuration
With the command showmount you can see the exported directories.
user@ubuntu:~$ showmount -e localhost Export list for localhost: /nfs 192.168.0.0/255.255.0.0
Related Links
Troubleshooting
If the root file system cannot be mounted via NFS the log file of the NFS server should be checked. In Ubuntu the log is written to the file /var/log/syslog.
An example of such a log entry looks like:
Nov 14 02:30:57 ubuntu mountd[8667]: refused mount request from 172.21.10.157 for /opt/ltib_iMX35/ltib/rootfs (/opt/ltib_iMX35/ltib/rootfs): unmatched host
In this case the server rejects the connection because the host does not match the one in the file /etc/exports.