chanslor/bcc-eBPF-tools-on-ol7

How I made bcc eBPF tools work on ol7 - Oracle Linux 7

How I made bcc eBPF tools work on ol7 - Oracle Linux 7

Thanks @brendangregg for the countless hours and excellent videos he has produced on getting us away from Solaris tracing to Linux tracing! And thank you @hydandata for the Centos7 example that got me started.

I've started using ol ( Oracle Linux ) a lot more since this statement was made by Oracle:

I've been using ol7 for 1 year and sync'ing updates nightly with no issues. NOTE: Oracle Linux updates include updateinfo.xml.gz Which is extra metadata that contains security and CVE information.

After downloading the 7.4 .iso from Oracle, my default kernel was 4.1 not 3.10 - I was unable to make ebf/bcc work, so these instructions use elrepo's kernel.

Oracle Linux 7.4 .iso came with the kernel-uek as default:

Check your default kernel

uname -a

Make sure your system is up to date

yum -y update

Install EPEL

RHEL 7 / Centos 7 / OL 7
rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

IMPORT "The Community Enterprise Linux Repository" for Kernel

rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -ivh  https://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm

yum repolist enabled
yum-config-manager --disable ol7_UEKR4
yum-config-manager --enable elrepo-kernel

yum install -y kernel-ml kernel-ml-devel kernel-ml-tools-libs-devel kernel-ml-tools-libs kernel-ml-tools kernel-ml-headers

grub2-set-default 0
reboot system

Remove all kernel 3.10 entries

KERNEL3=$(rpm -qa --queryformat='%{name}-%{version} ' kernel* | /bin/grep 3.10)
yum remove $KERNEL3

KERNEL4=$(rpm -qa --queryformat='%{name} ' kernel-uek*)
yum remove $KERNEL4

#Then I had to re-install gcc:
yum -y install gcc gcc-c++ gcc-gfortran glibc-devel glibc-headers
yum -y install elfutils-libelf-devel iperf cmake3

Setup your build environment

export BUILD_DIR="$HOME/build"
mkdir -p $BUILD_DIR

Install PLY

#TODO - put in .spec to build rpm
cd $BUILD_DIR
git clone https://github.com/iovisor/ply.git
cd ply
./autogen.sh
./configure
make
make install

Install CFE and LLVM

#TODO - put in .spec to build rpm
cd $BUILD_DIR
curl -LO http://releases.llvm.org/3.9.1/cfe-3.9.1.src.tar.xz
curl -LO http://releases.llvm.org/3.9.1/llvm-3.9.1.src.tar.xz
tar -xf cfe-3.9.1.src.tar.xz
tar -xf llvm-3.9.1.src.tar.xz
mkdir clang-build
mkdir llvm-build

cd llvm-build
cmake3 -G "Unix Makefiles" -DLLVM_TARGETS_TO_BUILD="BPF;X86" \
  -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr ../llvm-3.9.1.src
make
make install


cd ../clang-build
cmake3 -G "Unix Makefiles" -DLLVM_TARGETS_TO_BUILD="BPF;X86" \
  -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr ../cfe-3.9.1.src
make
make install

Finally, Install BCC

#TODO - put in .spec to build rpm
cd $BUILD_DIR
git clone https://github.com/iovisor/bcc.git
mkdir bcc-build
cd bcc-build
cmake3 -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX=/usr ../bcc
make
make install