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Kubernetes for the Mesos User
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Brian Hicks
July 12, 2016
Programming
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Kubernetes for the Mesos User
Talk for the Denver Mesos User Group
Brian Hicks
July 12, 2016
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Transcript
Kubernetes for the Mesos User Denver Mesos Users Group, July
12 2016 1
Brian Hicks brian@aster.is @brianhicks Denver Mesos Users Group, July 12
2016 2
Denver Mesos Users Group, July 12 2016 3
Demo! Denver Mesos Users Group, July 12 2016 4
Kubernetes? Kubernetes is an open-source platform for automating deployment, scaling,
and operations of application containers across clusters of hosts. 4 kubernetes.io (emphasis mine) Denver Mesos Users Group, July 12 2016 5
Web Interface Denver Mesos Users Group, July 12 2016 6
Denver Mesos Users Group, July 12 2016 7
Denver Mesos Users Group, July 12 2016 8
Scheduling Denver Mesos Users Group, July 12 2016 9
Mesos 2-level scheduler, based on resources 1. Workers offer resources
to masters 2. Masters offer resources to frameworks 3. Frameworks accept resource offers 4. Work gets scheduled Denver Mesos Users Group, July 12 2016 10
Kubernetes Multi-step constraint-based scheduler 1. Find "suitable" nodes for pod
2. Rank best nodes - for example, by least scheduled 3. Work gets scheduled Denver Mesos Users Group, July 12 2016 11
Application Definition Denver Mesos Users Group, July 12 2016 12
Marathon { "id": "basic-0", "cmd": "while [ true ] ;
do echo 'Hello Marathon' ; sleep 5 ; done", "cpus": 0.1, "mem": 10.0, "instances": 1 } Denver Mesos Users Group, July 12 2016 13
Kubernetes --- apiVersion: extensions/v1beta1 kind: Deployment metadata: name: basic-0 spec:
replicas: 1 template: metadata: labels: app: basic-0 spec: containers: - name: basic-0 image: docker.io/gliderlabs/alpine:3.2 resources: limits: cpu: 100m memory: 10Mi args: - /bin/sh - -c - while [ true ] ; do echo Hello Kubernetes ; sleep 5 ; done Denver Mesos Users Group, July 12 2016 14
Kubernetes (CLI) kubectl run \ basic-0 \ --image=docker.io/gliderlabs/alpine:3.2 \ --limits="cpu=100m,memory=10Mi"
\ -- /bin/sh -c 'while [ true ] ; do echo Hello Kubernetes ; sleep 5 ; done' Denver Mesos Users Group, July 12 2016 15
When K8s, when Mesos? Denver Mesos Users Group, July 12
2016 16
Fault Tolerance: Tie! Denver Mesos Users Group, July 12 2016
17
Data Frameworks: Mesos Denver Mesos Users Group, July 12 2016
18
12-factor Apps: K8s Denver Mesos Users Group, July 12 2016
19
UI: Mesos Denver Mesos Users Group, July 12 2016 20
CLI: K8s Denver Mesos Users Group, July 12 2016 21
IP-Per-Container: K8s Denver Mesos Users Group, July 12 2016 22
Multitenancy: K8s Denver Mesos Users Group, July 12 2016 23
Questions? Denver Mesos Users Group, July 12 2016 24