Docker & Kubernetes

What are Docker and Kubernetes

Transcript

1. Docker and Kubernetes 
 (an intro) Arnon Rotem-Gal-Oz
3. What is Docker?
4. Linux Containers
5. What’s isolated?
6. So what is Docker then?
7. What are the basics of the Docker system? Source Code Repository Dockerfile For A Docker Engine Docker Container Image Registry Build Docker Host 2 OS (Linux) Container A Container B Container C Container A Push Search Pull Run Host 1 OS (Linux) http://www.slideshare.net/dotCloud/docker-intro-november
8. Changes and Updates Docker Engine Docker Container Image Registry Docker Engine Push Update Bins/ Libs App A App Δ Bins / Base Container Image Host is now running A’’ Container Mod A’’ App Δ Bins / Bins/ Libs App A Bins / Bins/ Libs App A’’ Host running A wants to upgrade to A’’. Requests update. Gets only diffs Container Mod A’ http://www.slideshare.net/dotCloud/docker-intro-november
10. Work on my machine…
11. What is Kubernetes?
13. Is a Distributed Operating System for your code
14. 1. OS as an extended machine 
 2. OS as a Resource Manager
15. What we get • Scaling • Discovery • Load balancing and routing • Monitoring • Configuration
17. Azure/AWS/Google/AliCloud 
 all have managed Kubernetes offerings
18. Pod • A deployment unit • one or more containers • Shared storage volumes • Shared IP (i.e. access via localhost) and port space • Deployed together (co-located, co-scheduled) • Ephemeral (reschedule ➔ new instance, not rerunning an ”old” instance)
19. network Init container 2 Init container 1 container 1 container 2 POD
20. Side-car pattern (edge component)
21. • Job • CronJob • StatefulSet • DeamonSet • Deployment • Replicaset
24. Service • Set of Pods • An access policy (session affinity, port, external port etc.) • Provides a stable endpoint for other services http://kubernetes.io/docs/user-guide/services/
25. Declare desired state (via yaml)
26. https://threadreaderapp.com/thread/1067537816324845569.html
27. Operators: Deploy Apps on K8s
28. And there’s a lot more…