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Purpose

Describe the steps you need to build and test a Lustre system (MGS, MDT, MDS, OSS, OST, client) from the HPDD  master branch on a x86_64, RHEL/CentOS 6.4 machine.

Prerequisite

• A newly installed RHEL/CentOS 6.4 x86_64 machine connected to the internet.
• EPEL Repository: this is a convenient source for git.
  NOTE the EPEL 5 repository is used because it includes quilt.
• NOTE It is suggested that you have at least 1GB of memory on the machine you are using for the build.
• NOTE Verify that selinux SElinux is disabled.

Overview

Patches are available in the HPDD Git source repository. A test suite is included with the Lustre source. This document walks through the steps of patching the kernel, building Lustre and running a basic test of the complete system. 

Procedure

The procedure requires that a OS is setup for development - this includes Lustre sources, kernel source and build tools. Once setup, a new kernel can be patched, compiled, run and tested. Further reading on building a RHEL RPM based kernel is available from, among other sources, the CentOS site.

Provision machine and installing dependencies.

Once RHEL 6.3 is newly installed on rhel6-master login as root.

1. Install the kernel development tools.

   Code Block
   # yum -y groupinstall "Development Tools"

   
   

   Info
   title Problem with installing 'Development Tools'
   If the Development Tools group is not be available for some reason, you may find the following list if individual packages necessary to install. Code Block # yum -y install automake xmlto asciidoc elfutils-libelf-devel zlib-devel binutils-devel newt-devel python-devel hmaccalc perl-ExtUtils-Embed rpm-build make gcc redhat-rpm-config patchutils git

   
   

2. Install additional dependencies

   Code Block
   # yum -y install xmlto asciidoc elfutils-libelf-devel zlib-devel binutils-devel newt-devel python-devel hmaccalc perl-ExtUtils-Embed bison elfutils-devel audit-libs-devel

   
   

3. Install EPEL 5
   .  NOTE EPEL5 is used because it contains quilt and libselinux-devel

   Code Block
   # rpm -ivh http://download.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm

   
   

4. Install quilt and libselinux-devel

   Code Block
   # yum -y install quilt libselinux-devel

   
   

   Note
   title newt-devel
   newt-devel may not be available if you are using RHEL6. One option is to download newt-devel, slang-devel, and asciidoc RPMs from CentOS and install with: Code Block yum --nogpgcheck localinstall ./newt-devel-0.52.11-3.el6.x86_64.rpm ./slang-devel-2.2.1-1.el6.x86_64.rpm ./asciidoc-8.4.5-4.1.el6.noarch.rpm

   
   

Preparing the Lustre source.

1. Create a user build with the home directory /home/build

   Code Block
   # useradd -m build

   
   

2. Switch to the user build and change to the build $HOME directory.

   Code Block
   # su build # cd $HOME

   
   

3. Get the MASTER branch from HPDD git.

   Code Block
   # git clone git://git.hpdd.intelwhamcloud.com/fs/lustre-release.git # cd lustre-release

   
   

4. Run sh ./autogen.sh

5. Resolve any outstanding dependencies until autogen.sh completes successfully. Success will look like:

   Code Block
   # sh ./autogen.sh Checking for a complete tree... checking for automake-1.9 >= 1.9... found 1.9.6 ... ... configure.ac:10: installing `./config.sub' configure.ac:12: installing `./install-sh' configure.ac:12: installing `./missing' Running autoconf

   
   

Prepare a patched kernel for Lustre

You can have different ways to prepare a patched kernel for Lustre. The easier method is to download built RPM packages from build.hpdd.intel.com. For example, if you're running el7, you should download the packages from here: https://build.hpdd.intel.com/view/Non-Reviews/job/lustre-master/arch=x86_64,build_type=server,distro=el7,ib_stack=inkernel/lastSuccessfulBuild/artifact/artifacts/RPMS/x86_64/ at the time when this page is writtenis to download built RPM packages from the Releases page. You're going to need the packages starting with 'kernel-'. After new kernel packages are downloaded, you can skip the following few steps and go to the section 'Installing the Lustre kernel and rebooting'.

If you want a more challenge life, you can patch the kernel by yourself, in that case, please follow the steps below.

Prepare the kernel source

In this walk-thru, the kernel is built using rpmbuild - a tool specific to RPM based distributions.

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At this point, we now have kernel source, with all the RHEL/CentOS patches applied, residing in the directory /home/build/kernel/rpmbuild/BUILD/kernel-2.6.431.5.1.el6/linux-2.6.32-431.5.1.el6.x86_64/

Patch the kernel source with the Lustre code.

1. Add a unique build id so we can be certain our kernel is booted. Edit ~/kernel/rpmbuild/BUILD/kernel-2.6.32-431.5.1.el6/linux-2.6.32-431.5.1.el6.x86_64/Makefile and modify line 4, the EXTRAVERSION to read:

   Code Block
   EXTRAVERSION = .431.5.1.el6_lustre

   
   

2. enter Enter the directory ~/kernel/rpmbuild/BUILD/kernel-2.6.32-431.5.1.el6/linux-2.6.32-431.5.1.el6.x86_64/

   Code Block
   # cd ~/kernel/rpmbuild/BUILD/kernel-2.6.32-431.5.1.el6/linux-2.6.32-431.5.1.el6.x86_64/

   
   

3. overwrite Overwrite the .config file with ~/lustre-release/lustre/kernel_patches/kernel_configs/kernel-2.6.32-2.6-rhel6-x86_64.config

   Code Block
   # cp ~/lustre-release/lustre/kernel_patches/kernel_configs/kernel-2.6.32-2.6-rhel6-x86_64.config ./.config

   
   

4. link Link the Lustre series and patches

   Code Block
   # ln -s ~/lustre-release/lustre/kernel_patches/series/2.6-rhel6.series series # ln -s ~/lustre-release/lustre/kernel_patches/patches patches

   
   

5. Apply the patches to the kernel source using quilt

   Code Block
   # quilt push -av ... ... patching file fs/jbd2/transaction.c Hunk #3 succeeded at 1222 (offset 3 lines). Hunk #4 succeeded at 1357 (offset 3 lines). Now at patch patches/jbd2-jcberr-2.6-rhel6.patch

   
   

Build the new kernel as an RPM.

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, # 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

   
   

# grep -Ri 'intelentropy' /usr

At this point, you should have a fresh kernel RPM ~/kernel/rpmbuild/RPMS/x86_64/kernel-2.6.32.lustremaster-1.x86_64.rpm

Installing the Lustre kernel and rebooting.

1. As root, Install the kernel

   Code Block
   # rpm -ivh $PKG_PATH/kernel-*.rpm

   Depending on how you got your kernel packages, the PKG_PATH should be ~build/kernel/rpmbuild/RPMS/x86_64 if you built the packages by yourself, or any other directory where you downloaded the packages from https://build.hpddwhamcloud.intel.com/.

2. Create initrd using dracut (*This may not be required because initrd should have been created by installing new kernel*)

   Code Block
   # /sbin/new-kernel-pkg --package kernel --mkinitrd --dracut --depmod --install 2.6.32.431.5.1.el6_lustre

   
   

3. optional turn on lustre services, and specify net network type for lnet

   Code Block
   * chkconfig lustre on * vi /etc/modprobe.d/lustre.conf

   If you don't know what should be written to this file, just leave it empty for now.

4. Reboot the system with the reboot command.


5. view the login prompt with satisfaction, and make sure that new kernel is running:

   Code Block
   Red Hat Enterprise Linux Server release 6.0 (Santiago) Kernel 2.6.32l-'I'm new kernel' on an x86_64 client-10 login:

   
   

Configure and build Lustre

1. Configure Lustre source

   Code Block

   # cd ~/lustre-release/ # ./configure --with-linux=/lib/modules/kernel-2.6.32_lustremaster/build ... ... LLCPPFLAGS: -D__arch_lib__ -D_LARGEFILE64_SOURCE=1 CFLAGS: -g -O2 -Werror EXTRA_KCFLAGS: -include /home/build/lustre-release/config.h -g -I/home/build/lustre-release/libcfs/include -I/home/build/lustre-release/lnet/include -I/home/build/lustre-release/lustre/include LLCFLAGS: -g -Wall -fPIC -D_GNU_SOURCE Type 'make' to build Lustre.

   
   

2. make Make rpms:

   Code Block
   # make rpms ... ... Executing(%clean): /bin/sh -e /var/tmp/rpm-tmp.TsLWpD + umask 022 + cd /home/build/kernel/rpmbuild/BUILD + cd lustre-2.0.61 + rm -rf /home/build/kernel/rpmbuild/BUILDROOT/lustre-2.0.61-2.6.32_lustremaster_g0533e7b.x86_64 + exit 0 make[1]: Leaving directory `/home/build/lustre-release'

   
   

3. You should now have build the following, similarly named, rpmsRPMs:

   Code Block

   # ls *.rpm kernel-2.6.32lustremaster-1.x86_64.rpm lustre-2.0.61-2.6.32.lustremaster_g0533e7b.x86_64.rpm lustre-debuginfo-2.0.61-2.6.32.lustremaster_g0533e7b.x86_64.rpm lustre-ldiskfs-3.3.0-2.6.32.lustremaster_g0533e7b.x86_64.rpm lustre-ldiskfs-debuginfo-3.3.0-2.6.32.lustremaster_g0533e7b.x86_64.rpm lustre-modules-2.0.61-2.6.32.lustremaster_g0533e7b.x86_64.rpm lustre-source-2.0.61-2.6.32.lustremaster_g0533e7b.x86_64.rpm lustre-tests-2.0.61-2.6.32.lustremaster_g0533e7b.x86_64.rpm

   
   

Installing e2fsprogs

e2fsprogs is needed to run the test suite.

1. Download e2fsprogs from http://downloads.hpdd.intelwhamcloud.com/public/e2fsprogs/latest/

2. Install with

   Code Block
   # rpm -Uvh ./e2fsprogs-1.42.6.wc2-7.el6.x86_64.rpm ./e2fsprogs-libs-1.42.6.wc2-7.el6.x86_64.rpm

   
   

Installing Lustre.

1. Change to root and Change directory into ~ build~build/lustre-release/

2. Install modules lustre-modules and user space tools lustre-

   Code Block
   # rpm -ivh lustre-ldiskfs-3.3.0-2.6.32.lustremaster* # rpm -ivh lustre-modules-2.0.61-2.6.32.lustremaster* # rpm -ivh lustre-2.0.61-2.6.32.lustremaster_* # rpm -ivh lustre-tests-*

   
   

Disable SELinux (Lustre Servers)

SELinux, which is on by default in RHEL/CentOS, will prevent the format commands for the various Lustre targets from completing.  Therefore you must either disable it or adjust the settings.  These instructions explain how to disable it.

1. Run  getenforce to see if SELinux is enabled.  It should return 'Enforcing' or 'Disabled'.
2. To disable it, vi edit /etc/selinux/config and change the line 'selinux=enforcing' to 'selinux=disabled'.

3. Finally, reboot your system.

   
   

   Code Block

   # vi /etc/selinux/config ---- # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: # enforcing - SELinux security policy is enforced. # permissive - SELinux prints warnings instead of enforcing. # disabled - No SELinux policy is loaded. SELINUX=disabled # SELINUXTYPE= can take one of these two values: # targeted - Only targeted network daemons are protected. # strict - Full SELinux protection. SELINUXTYPE=targeted --- # shutdown -r now

   
   

Testing

1. run Run /usr/lib64/lustre/tests/llmount.sh

   Code Block

   # /usr/lib64/lustre/tests/llmount.sh Loading modules from /usr/lib64/lustre/tests/.. debug=0x33f0404 subsystem_debug=0xffb7e3ff gss/krb5 is not supported Formatting mgs, mds, osts Format mds1: /tmp/lustre-mdt1 Format ost1: /tmp/lustre-ost1 Format ost2: /tmp/lustre-ost2 Checking servers environments Checking clients rhel6-master environments Loading modules from /usr/lib64/lustre/tests/.. debug=0x33f0404 subsystem_debug=0xffb7e3ff gss/krb5 is not supported Setup mgs, mdt, osts Starting mds1: -o loop,user_xattr,acl /tmp/lustre-mdt1 /mnt/mds1 debug=0x33f0404 subsystem_debug=0xffb7e3ff debug_mb=10 Started lustre-MDT0000 Starting ost1: -o loop /tmp/lustre-ost1 /mnt/ost1 debug=0x33f0404 subsystem_debug=0xffb7e3ff debug_mb=10 Started lustre-OST0000 Starting ost2: -o loop /tmp/lustre-ost2 /mnt/ost2 debug=0x33f0404 subsystem_debug=0xffb7e3ff debug_mb=10 Started lustre-OST0001 Starting client: rhel5-build: -o user_xattr,acl,flock rhel6-master@tcp:/lustre /mnt/lustre debug=0x33f0404 subsystem_debug=0xffb7e3ff debug_mb=10 Using TIMEOUT=20 disable quota as required

   
   

2. you You will now have a Lustre filesystem available at /mnt/lustre
3. NOTE: if you receive an error similar to: mkfs.lustre: Can't parse NID 'rhel6-master@tcp' you'll need to associate the IP address of a non-loopback interface with name of your machine into the /etc/hosts file.

ENDS~