driverkit

Status: Under development

A command line tool that can be used to build the Falco kernel module and eBPF probe.

Usage

When you meet kernelversion that refers to the version you get executing uname -v:

For example, below, the version is the 59 after the hash

uname -v
#59-Ubuntu SMP Wed Dec 4 10:02:00 UTC 2019

When you meet kernelrelease, that refers to the kernel release you get executing uname -r:

uname -r
4.15.0-1057-aws

Against a Kubernetes cluster

driverkit kubernetes --output-module /tmp/falco.ko --kernelversion=81 --kernelrelease=4.15.0-72-generic --driverversion=dev --target=ubuntu-generic

Against a Docker daemon

driverkit docker --output-module /tmp/falco.ko --kernelversion=81 --kernelrelease=4.15.0-72-generic --driverversion=dev --target=ubuntu-generic

Build using a configuration file

Create a file named ubuntu-aws.yaml containing the following content:

kernelrelease: 4.15.0-1057-aws
kernelversion: 59
target: ubuntu-aws
output:
  module: /tmp/falco-ubuntu-aws.ko
  probe: /tmp/falco-ubuntu-aws.o
driverversion: dev

Now run driverkit using the configuration file:

driverkit docker -c ubuntu-aws.yaml

Supported targets

ubuntu-generic

Example configuration file to build both the Kernel module and eBPF probe for Ubuntu generic.

kernelrelease: 4.15.0-72-generic
kernelversion: 81
target: ubuntu-generic
output:
  module: /tmp/falco-ubuntu-generic.ko
  probe: /tmp/falco-ubuntu-generic.o
driverversion: dev

ubuntu-aws

Example configuration file to build both the Kernel module and eBPF probe for Ubuntu AWS.

kernelrelease: 4.15.0-1057-aws
kernelversion: 59
target: ubuntu-aws
output:
  module: /tmp/falco-ubuntu-aws.ko
  probe: /tmp/falco-ubuntu-aws.o
driverversion: dev

centos 6

kernelrelease: 2.6.32-754.14.2.el6.x86_64
kernelversion: 1
target: centos
output:
  module: /tmp/falco-centos6.ko
driverversion: dev

centos 7

kernelrelease: 3.10.0-957.12.2.el7.x86_64
kernelversion: 1
target: centos
output:
  module: /tmp/falco-centos7.ko
driverversion: dev

centos 8

kernelrelease: 4.18.0-147.5.1.el8_1.x86_64
kernelversion: 1
target: centos
output:
  module: /tmp/falco-centos8.ko
driverversion: dev

amazonlinux

kernelrelease: 4.14.26-46.32.amzn1.x86_64
target: amazonlinux
output:
    module: /tmp/falco_amazonlinux_4.14.26-46.32.amzn1.x86_64.ko
driverversion: be1ea2d9482d0e6e2cb14a0fd7e08cbecf517f94

amazonlinux 2

kernelrelease: 4.14.171-136.231.amzn2.x86_64
target: amazonlinux2
output:
    module: /tmp/falco_amazonlinux2_4.14.171-136.231.amzn2.x86_64.ko
    probe: /tmp/falco_amazonlinux2_4.14.171-136.231.amzn2.x86_64.o
driverversion: be1ea2d9482d0e6e2cb14a0fd7e08cbecf517f94

debian

Example configuration file to build both the Kernel module and eBPF probe for Debian.

kernelrelease: 4.19.0-6-amd64
kernelversion: 1
output:
  module: /tmp/falco-debian.ko
  probe: /tmp/falco-debian.o
target: debian
driverversion: dev

vanilla

In case of vanilla, you also need to pass the kernel config data in base64 format.

In most systems you can get kernelconfigdata by reading /proc/config.gz.

kernelrelease: 5.5.2
kernelversion: 1
target: vanilla
output:
  module: /tmp/falco-vanilla.ko
  probe: /tmp/falco-vanilla.o
driverversion: 0de226085cc4603c45ebb6883ca4cacae0bd25b2

Now you can add the kernelconfigdata to the configuration file, to do so:

zcat /proc/config.gz| base64 -w0 | awk '{print "kernelconfigdata: " $1;}' >> /tmp/vanilla.yaml

The command above assumes that you saved the configuration file at /tmp/vanilla.yaml

Note

Usually, building for a vanilla target requires more time.

So, we suggest to increase the driverkit timeout (defaults to 60 seconds):

driverkit docker -c /tmp/vanilla.yaml --timeout=300

Goals

• Have a package that can build the Falco kernel module in k8s
• Have a package that can build the Falco kernel module in docker
• Have a package that can build the Falco eBPF probe in k8s
• Have a package that can build the Falco eBPF probe in docker
• Support the top distributions in our Survey and the Vanilla Kernel
  • Ubuntu (ubuntu-aws, ubuntu-generic)
  • CentOS 8
  • CentOS 7
  • CentOS 6
  • AmazonLinux (amazonlinux, amazonlinux2)
  • Debian
  • Vanilla kernel (vanilla)

Survey

We are conducting a survey to know what is the most interesting set of Operating Systems we must support first in driverkit.

You can find the results of the survey here