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Note

This walk-thru is targeting developers who want to explore the bleeding edge of Lustre. If you are evaluating Lustre for production, you should choose a Lustre Release.

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

Info
titlepre-built RPMs are available

Lustre 2.1 servers currently require a patched and compiled kernel. A patched and compiled Lustre server kernel is available from IntelWhamcloud. A separate page is available to walk thru setting up Lustre with these pre-built RPMs. This document is for those who wish to build their Lustre system from source.  Note that if you are not modifying the kernel patches on the server, it is possible to use the pre-built Lustre server kernel RPMs, and only build the Lustre code. Note that a patched kernel is NOT needed for the Lustre client.

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
    titleProblem 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
    titlenewt-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.hpddwhamcloud.intel.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 writtenthe 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.

...

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
    


Info

If you receive a request to generate more entropy, you need to trigger some disk I/O or keyboard I/O. In another terminal, you can either type randomly or execute the following command to generate entropy:

Code Block
# 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.hpddwhamcloud.intel.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~