Docker & Kubernetes - Speaker Deck

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Docker and Kubernetes   (an intro) Arnon Rotem-Gal-Oz

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What is Docker?

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Linux Containers

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What’s isolated?

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So what is Docker then?

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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

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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

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Work on my machine…

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What is Kubernetes?

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Is a Distributed Operating System for your code

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1. OS as an extended machine   2. OS as a Resource Manager

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What we get • Scaling • Discovery • Load balancing and routing • Monitoring • Configuration

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Azure/AWS/Google/AliCloud   all have managed Kubernetes offerings

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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)

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network Init container 2 Init container 1 container 1 container 2 POD

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Side-car pattern (edge component)

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• Job • CronJob • StatefulSet • DeamonSet • Deployment • Replicaset

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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/

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Declare desired state (via yaml)

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https://threadreaderapp.com/thread/1067537816324845569.html

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Operators: Deploy Apps on K8s

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And there’s a lot more…  