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Podman for DevOps

You're reading from   Podman for DevOps Containerization reimagined with Podman and its companion tools

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Product type Paperback
Published in Apr 2022
Publisher Packt
ISBN-13 9781803248233
Length 518 pages
Edition 1st Edition
Tools
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Authors (2):
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Gianni Salinetti Gianni Salinetti
Author Profile Icon Gianni Salinetti
Gianni Salinetti
Alessandro Arrichiello Alessandro Arrichiello
Author Profile Icon Alessandro Arrichiello
Alessandro Arrichiello
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Toc

Table of Contents (19) Chapters Close

Preface 1. Section 1: From Theory to Practice: Running Containers with Podman
2. Chapter 1: Introduction to Container Technology FREE CHAPTER 3. Chapter 2: Comparing Podman and Docker 4. Chapter 3: Running the First Container 5. Chapter 4: Managing Running Containers 6. Chapter 5: Implementing Storage for the Container's Data 7. Section 2: Building Containers from Scratch with Buildah
8. Chapter 6: Meet Buildah – Building Containers from Scratch 9. Chapter 7: Integrating with Existing Application Build Processes 10. Chapter 8: Choosing the Container Base Image 11. Chapter 9: Pushing Images to a Container Registry 12. Section 3: Managing and Integrating Containers Securely
13. Chapter 10: Troubleshooting and Monitoring Containers 14. Chapter 11: Securing Containers 15. Chapter 12: Implementing Container Networking Concepts 16. Chapter 13: Docker Migration Tips and Tricks 17. Chapter 14: Interacting with systemd and Kubernetes 18. Other Books You May Enjoy

Interconnecting two or more containers

Using our knowledge from the previous section, we should be aware that two or more containers that have been created inside the same network can reach each other on the same subnet without the need for external routing.

At the same time, two or more containers that belong to different networks will be able to reach each other on different subnets by routing packets through their networks.

To demonstrate this, let's create a couple of busybox containers in the same default network:

# podman run -d --name endpoint1 \
  --cap-add=net_admin,net_raw busybox /bin/sleep 10000
# podman run -d --name endpoint2 \
  --cap-add=net_admin,net_raw busybox /bin/sleep 10000

In our lab, the two containers have 10.88.0.14 (endpoint1) and 10.88.0.15 (endpoint2) as their addresses. These two addresses are subject to change and can be collected using the methods illustrated previously with the podman inspect or the nsenter commands...

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