Before running the script, ensure that virt-install is available on the system.
./build_bpf_demo.sh -n bpf-demo -k bpf_demo.ks.erb
After setting up the initial VM, log in (the default password is ‘iovisor’) and determine the DHCP IP. SSH to this IP as root.
To set up a kernel with the right options, run bpf-kernel-setup.
[root@bpf-demo ~]# bpf-kernel-setup Cloning into 'net-next'...
After pulling the net-next branch, the kernel config menu should pop up. Ensure that the below settings are proper.
General setup --->
[*] Enable bpf() system call
Networking support --->
Networking options --->
QoS and/or fair queueing --->
<M> BPF-based classifier
<M> BPF based action
[*] enable BPF Just In Time compiler
Once the .config is saved, the build will proceed and install the resulting kernel. This kernel has updated userspace headers (e.g. the bpf() syscall) which install into /usr/local/include...proper packaging for this will be distro-dependent.
Next, run bpf-llvm-setup to pull and compile LLVM with BPF support enabled.
[root@bpf-demo ~]# bpf-llvm-setup Cloning into 'llvm'...
The resulting libraries will be installed into /opt/local/llvm.
Next, reboot into the new kernel, either manually or by using the kexec helper.
[root@bpf-demo ~]# kexec-4.1.0-rc1+ Connection to 192.168.122.247 closed by remote host. Connection to 192.168.122.247 closed.
Reconnect and run the final step, building and testing bcc.
[root@bpf-demo ~]# bcc-setup
Cloning into 'bcc'...
...
Linking CXX shared library libcc.so
[100%] Built target bcc
...
Running tests...
Test project /root/bcc/build
Start 1: py_test1
1/4 Test #1: py_test1 ......................... Passed 0.24 sec
Start 2: py_test2
2/4 Test #2: py_test2 ......................... Passed 0.53 sec
Start 3: py_trace1
3/4 Test #3: py_trace1 ........................ Passed 0.09 sec
Start 4: py_trace2
4/4 Test #4: py_trace2 ........................ Passed 1.06 sec
100% tests passed, 0 tests failed out of 4