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1. Get the kernel source. First create the directory structure, then get the source from the RPM. Create a .rpmmacros file to install the kernel source in our user dir.

   Code Block
   # cd $HOME # mkdir -p kernel/rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS} # cd kernel # echo '%_topdir %(echo $HOME)/kernel/rpmbuild' > ~/.rpmmacros

2. Install the kernel source:

   Code Block
   # rpm -ivh http://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/kernel-2.6.32-431.5.1.el6.src.rpm 2>&1 | grep -v mockb   NOTE: For RHEL 7, you can use # rpm -ivh http://vault.centos.org/7.2.1511/updates/Source/SPackages/kernel-3.10.0-327.22.2.el7.src.rpm

   Note
   title RHEL kernel versions
   Red Hat periodically release updates to their distributed kernel. The Lustre Master attempts to stay up-to-date with the most recent kernel from Red Hat. In the event that the link above is not completely up-to-date, you should visit the Red Hat source RPM download site and ensure you are downloading the most recent kernel. The most recent supported kernel is recorded in lustre/kernel_patches/which_patch.

3. Prepare the source using rpmbuild.

   Code Block
   # cd ~/kernel/rpmbuild # rpmbuild -bp --target=`uname -m` ./SPECS/kernel.spec

   
   This will end with:

   Code Block
   ... gpg: Total number processed: 1 gpg: imported: 1 + gpg --homedir . --export --keyring ./kernel.pub Red gpg: WARNING: unsafe permissions on homedir `.' + gcc -o scripts/bin2c scripts/bin2c.c + scripts/bin2c ksign_def_public_key __initdata + cd .. + exit 0

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1. Go into the kernel source directory and issue the following commands to build a kernel rpm.

   Code Block
   # cd ~/kernel/rpmbuild/BUILD/kernel-2.6.32-431.5.1.el6/linux-2.6.32-431.5.1.el6.x86_64/ # make oldconfig || make menuconfig # make include/asm # make include/linux/version.h # make SUBDIRS=scripts # make include/linux/utsrelease.h # make rpm   NOTE: with RHEL 7, just do the following # make oldconfig # make -j4 rpm

2. A successful build will return:

   Code Block

   ... ... Wrote: /home/build/kernel/rpmbuild/SRPMS/kernel-2.6.32lustremaster-1.src.rpm Wrote: /home/build/kernel/rpmbuild/RPMS/x86_64/kernel-2.6.32.lustremaster-1.x86_64.rpm Executing(%clean): /bin/sh -e /var/tmp/rpm-tmp.f73m1V + umask 022 + cd /home/build/kernel/rpmbuild/BUILD + cd kernel-2.6.32lustremaster + rm -rf /home/build/kernel/rpmbuild/BUILDROOT/kernel-2.6.32.lustremaster-1.x86_64 + exit 0 rm ../kernel-2.6.32lustremaster.tar.gz

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