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 Whamcloud 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 is disabled.
Overview
pre-built RPMs are available
Lustre 2.1 servers require a patched and compiled kernel. A patched and compiled Lustre server kernel is available form Whamcloud. 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 Whamcloud 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.
Install the kernel development tools.
# yum -y groupinstall "Development Tools"
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.
# 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
Install additional dependencies
# yum -y install xmlto asciidoc elfutils-libelf-devel zlib-devel binutils-devel newt-devel python-devel hmaccalc perl-ExtUtils-Embed
Install EPEL 5
NOTE EPEL5 is used because it contains quilt.# rpm -ivh http://download.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm
Install quilt
# yum -y install quilt
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: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.
Create a user
build
with the home directory/home/build
# useradd -m build
Switch to the user
build
and change to the build$HOME
directory.# su build # cd $HOME
Get the MASTER branch from Whamcloud git.
# git clone git://git.whamcloud.com/fs/lustre-release.git # cd lustre-release
- Run
sh ./autogen.sh
Resolve any outstanding dependencies until
autogen.sh
completes successfully. Success will look like:# 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 the kernel source
In this walk-thru, the kernel is built using rpmbuild - a tool specific to RPM based distributions.
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.# cd $HOME # mkdir -p kernel/rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS} # cd kernel # echo '%_topdir %(echo $HOME)/kernel/rpmbuild' > ~/.rpmmacros
Install the kernel source:
RHEL:
# rpm -ivh http://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/kernel-2.6.32-358.el6.src.rpm 2>&1 | grep -v mockb
CentOS:
# rpm -ivh http://vault.centos.org/6.4/os/Source/SPackages/kernel-2.6.32-358.el6.src.rpm 2>&1 | grep -v mockb
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
.Prepare the source using rpmbuild.
# cd ~/kernel/rpmbuild # rpmbuild -bp --target=`uname -m` ./SPECS/kernel.spec
This will end with:... 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
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-2.6.32-358.el6/linux-2.6.32-358.el6.x86_64/
Patch the kernel source with the Lustre code.
Add a unique build id so we can be certain our kernel is booted. Edit
~/kernel/rpmbuild/BUILD/kernel-2.6.32-358.el6/linux-2.6.32-358.el6.x86_64/Makefile
and modify line 4, theEXTRAVERSION
to read:EXTRAVERSION = .358.el6_lustre.x86_64
enter the directory
~/kernel/rpmbuild/BUILD/kernel-2.6.32-358.el6/linux-2.6.32-358.el6.x86_64/
# cd ~/kernel/rpmbuild/BUILD/kernel-2.6.32-358.el6/linux-2.6.32-358.el6.x86_64/
overwrite the
.config
file with~/lustre-release/lustre/kernel_patches/kernel_configs/kernel-2.6.32-2.6-rhel6-x86_64.config
# cp ~/lustre-release/lustre/kernel_patches/kernel_configs/kernel-2.6.32-2.6-rhel6-x86_64.config ./.config
link the Lustre series and patches
# ln -s ~/lustre-release/lustre/kernel_patches/series/2.6-rhel6.series series # ln -s ~/lustre-release/lustre/kernel_patches/patches patches
Apply the patches to the kernel source using quilt
# 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.
Go into the kernel source directory and issue the following commands to build a kernel rpm.
# cd ~/kernel/rpmbuild/BUILD/kernel-2.6.32-358.el6/linux-2.6.32-358.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
A successful build will return:
... ... 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
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:
# grep -Ri 'whamcloud' /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
Configure and build Lustre
Configure Lustre source
# cd ~/lustre-release/ # ./configure --with-linux=/home/build/kernel/rpmbuild/BUILD/kernel-2.6.32.358.el6_lustre.x86_64/ ... ... 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.
make rpms:
# 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'
You should now have build the following, similarly named, rpms:
# ls ~build/kernel/rpmbuild/RPMS/x86_64/ 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 the Lustre kernel and rebooting.
As root, Install the kernel
# rpm -ivh ~build/kernel/rpmbuild/RPMS/x86_64/kernel-2.6.32.lustremaster-1.x86_64.rpm
Create initrd using
dracut
# /sbin/new-kernel-pkg --package kernel --mkinitrd --dracut --depmod --install 2.6.32.lustremaster
optional turn on lustre services, and specify net for lnet
* chkconfig lustre on * vi /etc/modprobe.d/lustre.conf
reboot
view the login prompt with satisfaction:
Red Hat Enterprise Linux Server release 6.0 (Santiago) Kernel 2.6.32lustremaster on an x86_64 client-10 login:
Installing e2fsprogs
e2fsprogs is needed to run the test suite.
- Download e2fsprogs from http://downloads.whamcloud.com/public/e2fsprogs/latest/
Install with
# 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.
- Change to
root
and Change directory into/home/build/kernel/rpmbuild/RPMS/x86_64/
Install modules
lustre-modules
and user space toolslustre-
# 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.
- Run getenforce to see if SELinux is enabled. It should return 'Enforcing' or 'Disabled'.
- To disable it, vi /etc/selinux/config and change the line 'selinux=enforcing' to 'selinux=disabled'.
Finally, reboot your system.
# 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
run
/usr/lib64/lustre/tests/llmount.sh
# /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
- you will now have a Lustre filesystem available at
/mnt/lustre
- NOTE: if you receive an error:
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.