Running eBPF Tools in Minikube

Running eBPF Tools in Minikube

Overview

eBPF tools are performance tools used for observing the Linux kernel. These tools can be used to monitor your Kubernetes application in minikube. This tutorial will cover how to set up your minikube cluster so that you can run eBPF tools from a Docker container within minikube.

Prerequisites

  • Latest minikube binary

Tutorial

First, start minikube:

$ minikube start --iso-url https://storage.googleapis.com/minikube-performance/minikube.iso

You will need to download and extract necessary kernel headers within minikube:

minikube ssh -- curl -Lo /tmp/kernel-headers-linux-4.19.94.tar.lz4 https://storage.googleapis.com/minikube-kernel-headers/kernel-headers-linux-4.19.94.tar.lz4 

minikube ssh -- sudo mkdir -p /lib/modules/4.19.94/build

minikube ssh -- sudo tar -I lz4 -C /lib/modules/4.19.94/build -xvf /tmp/kernel-headers-linux-4.19.94.tar.lz4

minikube ssh -- rm /tmp/kernel-headers-linux-4.19.94.tar.lz4

You can now run BCC tools as a Docker container in minikube:

$ minikube ssh -- docker run --rm   --privileged   -v /lib/modules:/lib/modules:ro   -v /usr/src:/usr/src:ro   -v /etc/localtime:/etc/localtime:ro   --workdir /usr/share/bcc/tools   zlim/bcc ./execsnoop


Unable to find image 'zlim/bcc:latest' locally
latest: Pulling from zlim/bcc
6cf436f81810: Pull complete 
987088a85b96: Pull complete 
b4624b3efe06: Pull complete 
d42beb8ded59: Pull complete 
90970d1ebfd9: Pull complete 
29c3815350eb: Pull complete 
e21dfbd8fcfc: Pull complete 
Digest: sha256:914bea8970535cd6b0d5dee13f99569c5f0d597942c8333c0aa92443473aff27
Status: Downloaded newer image for zlim/bcc:latest
PCOMM            PID    PPID   RET ARGS
runc             5059   2011     0 /usr/bin/runc --version
docker-init      5065   2011     0 /usr/bin/docker-init --version
nice             5066   4012     0 /usr/bin/nice -n 19 du -x -s -B 1 /var/lib/kubelet/pods/1cf22976-f3e0-498b-bc04-8c7068e6e545/volumes/kubernetes.io~secret/storage-provisioner-token-cvk4x
Last modified April 4, 2020: Change directory case (4593ac355)