{{tag>[centos7 nbd]}}

=====Network block device (nbd) - CentOS 7=====
  * Install prerequisites:<code>yum groupinstall "development tools" 
yum install kernel-devel kernel-headers ncurses-devel
yum install xmlto asciidoc python-devel newt-devel perl pesign elfutils-devel audit-libs-devel perl-ExtUtils-Embed.noarch</code>
  * Download and install the kernel source:<code>cd /root
yumdownloader --source kernel
yum install kernel-3.10.0-229.4.2.el7.src.rpm</code>
  * Prepare for building a binary RPM. Make sure you have enough space on the file system:<code>cd /root/rpmbuild/SPECS/
rpmbuild -bp kernel.spec</code>
  * Configure the kernel module:<code>cd /root/rpmbuild/BUILD/kernel-3.10.0-229.4.2.el7/linux-3.10.0-229.4.2.el7.centos.x86_64
make menuconfig</code>
  * Go to 'Device Drivers | Block devices' and set 'M' on 'Network block device support' exit saving new kernel config.
  * Compile time (get some coffee):<code>make prepare && make modules_prepare -j4 && make -j4</code>
  * Next build the block device modules: <code>make M=drivers/block</code>
  * Check the module:<code>modinfo drivers/block/nbd.ko</code>
  * If all looks good copy it to the running kernels extra folder in /lib/modules/$(uname -r)/extra.
  * Load the module:<code>depmod -a && modprobe nbd</code>