SlideShare a Scribd company logo
BPF and Application
profiling
Thursday, Jan 27, 2022
Your Speaker Today:
● Reza Ramezanpour - Developer
Advocate @ Tigera (Project
Calico)
● I create bugs and watch them
cause panic!
● I’m always learning. Let’s connect!
Agenda
● Calico overview
● Brief overview of applications
● A magical solution
● BPF observability
● Demo
● What’s next?
Calico overview
01
What is
Project Calico?
● Free
● Open source
● Networking and security solution
● Much much more!
https://projectcalico.org
https://slack.projectcalico.org
@projectcalico
https://github.com/projectcalico/community
https://discuss.projectcalico.org
6000+
Slack channel members
150+
Contributors
1,000,000+
Nodes powered by Calico every day
Brief overview of applications
02
© 2022 Tigera, Inc. Proprietary and Confidential
8
Kernel is an application that
directly interacts with the
hardware resources.
What is an application?
© 2022 Tigera, Inc. Proprietary and Confidential
9
Have you seen this function at
work?
void panic(const char *fmt, ...)
{
…
}
Please don’t kill the Kernel
The magical solution
03
© 2022 Tigera, Inc. Proprietary and Confidential
11
Turning it off and on again?
© 2022 Tigera, Inc. Proprietary and Confidential
12
Q: My phone stopped working
how can I fix it?
A: Hold the home and power button for
7 seconds and wait until you can see
the boot logo
But why?
An eBPF story
Monitoring and Observability
04
© 2022 Tigera, Inc. Proprietary and Confidential
14
● iostat
● top
● snmp
● netflow
Old approach
© 2022 Tigera, Inc. Proprietary and Confidential
15
BPF history
Demo
05
What’s next?
06
© 2022 Tigera, Inc. Proprietary and Confidential
18
Sounds great, what can be observed?
© 2022 Tigera, Inc. Proprietary and Confidential
19
What’s next?
Stuff used for the demo:
https://github.com/frozenprocess/Tigera-Presentations/tr
ee/master/2022-01-27.CNCF-ebpf-profiling-demo
Do-It-Yourself Resources
When things are not working:
Github: https://github.com/frozenprocess
Twitter: https://twitter.com/fr0zenprocess
Linkedin: https://www.linkedin.com/in/rramezanpour/
Follow us on:
kubectl-flame
https://github.com/yahoo/kubectl-flame
----
kubectl-trace
https://github.com/iovisor/kubectl-trace
---
bpftrace tools
https://github.com/iovisor/bpftrace
---
Calico eBPF tools
https://projectcalico.docs.tigera.io/maintenance/troubleshoot/troubles
hoot-ebpf
---
Original BPF paper
https://www.usenix.org/conference/usenix-winter-1993-conference/bsd
-packet-filter-new-architecture-user-level-packet
Credits
Get Calico Certified
https://www.tigera.io/lp/calico-certification/
Search calico-certification on tigera.io
New! - Kubernetes Security
and Observability eBook
https://www.tigera.io/lp/kubern
etes-security-and-observabilit
y-ebook/
Search O’Reilly ebook on tigera.io
New! - Calico Big Cats
https://www.tigera.io/project-c
alico/calico-big-cats-ambassa
dor-program/
Follow us on:
Thank you!

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