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© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 1
© Copyright 2020 Rancher Labs. All Rights Reserved. 1
Kubernetes Master Class
June 28, 2022
Avoiding Configuration Drift with Argo CD
by SUSE
© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 2
Crowdcast
● Ask questions and upvote
● Look out for polls
● Say something nice in the chat
● Session is recorded
© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 3 3
Rancher Master Class Series
• 45 minutes – 75 minutes
• Questions are always welcome!
• Use the questions tab to submit your questions
• We do our best to respond to all questions during the Q&A at
the end, so mark your question as private if needed
© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 4
http://youtube.com/c/rancher
This session is being recorded!

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© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 5
Dan Garfield
Co-Founder & Chief Open Source Officer
Argo Proj Maintainer
Speaker
© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 6
Overview
1 Brief Intro to Rancher
2 Explaining Configuration Drift
3 Intro to GitOps / Argo CD
4 Bidirectional Sync Git < - > Cluster
5 Self-Healing Kubernetes Clusters
Live Demo
Q/A
6
7
© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 7
Kubernetes with Rancher
© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 8
What is Configuration Drift?
• Two environments are supposed to be similar – but are
not
• Nobody knows what is deployed in a specific
environment
• Ad hoc changes, cowboy deployments, undocumented
hotfixes
• Security breach

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© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 9
What is Configuration Drift?
© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 10
Common Symptoms
• Deployments succeed in staging but fail in production
• Some systems are off-limits because people are afraid
to touch them
• Hacks and quick fixes in specific environments are very
common
• People always try to find differences between
environments
© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 11
Configuration Drift and Kubernetes
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© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 13
Strategies for Avoiding Configuration Drift
• Documentation
• Audit all manual changes
• Attempt to enforce best practices
• Training and onboarding
All these are doomed to fail
© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 14
Argo CD and GitOps
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How GitOps Works
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© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 17
Always Guarantee that Git <-> Cluster
© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 18
Auto-Detect Manual Changes
© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 19
Self-Healing
© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 20
Rancher + Argo CD
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https://github.com/todaywasawesome

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© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 21
About Codefresh
• Hosted GitOps
• Argo Control Plane
• Built-in Argo Rollouts,
Workflows, Events
• Security, enterprise
support
• DORA metrics
• CI Integrations
• Use Argo at Scale
What’s in the
release?
● Git commits
● Pull requests
● Jira issues
Which release is
impacting
production?
● Filtered timeline
of all releases
● Failure
identification
Which services
are rolling out?
● View of canary
and blue/green
deployments
● Health metrics
● 1-click rollbacks
Where are
artifacts
deployed?
● Universal view
across org and
apps
● Associated
pipelines/trigger
s
© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 22
Q & A
© Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 23 23
Thank You

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  • 1. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 1 © Copyright 2020 Rancher Labs. All Rights Reserved. 1 Kubernetes Master Class June 28, 2022 Avoiding Configuration Drift with Argo CD by SUSE
  • 2. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 2 Crowdcast ● Ask questions and upvote ● Look out for polls ● Say something nice in the chat ● Session is recorded
  • 3. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 3 3 Rancher Master Class Series • 45 minutes – 75 minutes • Questions are always welcome! • Use the questions tab to submit your questions • We do our best to respond to all questions during the Q&A at the end, so mark your question as private if needed
  • 4. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 4 http://youtube.com/c/rancher This session is being recorded!
  • 5. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 5 Dan Garfield Co-Founder & Chief Open Source Officer Argo Proj Maintainer Speaker
  • 6. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 6 Overview 1 Brief Intro to Rancher 2 Explaining Configuration Drift 3 Intro to GitOps / Argo CD 4 Bidirectional Sync Git < - > Cluster 5 Self-Healing Kubernetes Clusters Live Demo Q/A 6 7
  • 7. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 7 Kubernetes with Rancher
  • 8. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 8 What is Configuration Drift? • Two environments are supposed to be similar – but are not • Nobody knows what is deployed in a specific environment • Ad hoc changes, cowboy deployments, undocumented hotfixes • Security breach
  • 9. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 9 What is Configuration Drift?
  • 10. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 10 Common Symptoms • Deployments succeed in staging but fail in production • Some systems are off-limits because people are afraid to touch them • Hacks and quick fixes in specific environments are very common • People always try to find differences between environments
  • 11. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 11 Configuration Drift and Kubernetes
  • 12. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 12 Configuration Drift and Kubernetes
  • 13. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 13 Strategies for Avoiding Configuration Drift • Documentation • Audit all manual changes • Attempt to enforce best practices • Training and onboarding All these are doomed to fail
  • 14. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 14 Argo CD and GitOps
  • 15. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 15 How GitOps Works
  • 16. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 16 Argo CD and GitOps
  • 17. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 17 Always Guarantee that Git <-> Cluster
  • 18. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 18 Auto-Detect Manual Changes
  • 19. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 19 Self-Healing
  • 20. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 20 Rancher + Argo CD DEMO https://github.com/todaywasawesome
  • 21. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 21 About Codefresh • Hosted GitOps • Argo Control Plane • Built-in Argo Rollouts, Workflows, Events • Security, enterprise support • DORA metrics • CI Integrations • Use Argo at Scale What’s in the release? ● Git commits ● Pull requests ● Jira issues Which release is impacting production? ● Filtered timeline of all releases ● Failure identification Which services are rolling out? ● View of canary and blue/green deployments ● Health metrics ● 1-click rollbacks Where are artifacts deployed? ● Universal view across org and apps ● Associated pipelines/trigger s
  • 22. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 22 Q & A
  • 23. © Copyright 2020 Rancher Labs. All Rights Reserved. Confidential 23 23 Thank You