Kubernete Second Week

July 24, 2019

54

Kubernete Second Week

Some intermediate Kubernetes primitives and concepts as part of a workshop.

Mofizur Rahman

July 24, 2019

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Transcript

Kubernetes Second Week Mofi Rahman
@moficodes tiny.cc/k8s-second-week
@moficodes github.com/moficodes/k8s-second-week
Mofizur Rahman Senior Developer Advocate, Vonage Work on Client SDKs,
Collect Stickers, Write Go and JS code @moficodes
@moficodes Resource Quotas “Give me x amount of ram and
cpu in y increment”
@moficodes Example apiVersion: v1 kind: Pod metadata: name: high-priority spec:
containers: - name: high-priority image: ubuntu resources: requests: memory: "2Gi" cpu: "100m" limits: memory: "10Gi" cpu: "500m" priorityClassName: high
@moficodes Quality of Service Best Effort (not limit mentioned) Burstable
(x > y) Guranteed (x == y)
@moficodes Kubernetes Lifecycle Poststart Prestop Sigterm Sigkill
@moficodes Try to not use it.
@moficodes Scheduling Kubernetes is a scheduler at heart that gives
you apis to access resources
@moficodes Scheduling Affinity Nodeaffinity Podaffinity Taints Tolerations
@moficodes Descheduler Kubernetes can actually kick things out if needed
Except- Critical Pods (marked with annotations) Orphan Pods Daemonsets Pod with Storage
@moficodes Jobs Batch work
@moficodes Cron Jobs Timed batch works
@moficodes Daemonsets Per Node pod
@moficodes Init Container Runs before anything in your container
@moficodes Sidecar Runs beside the container
@moficodes Secrets K8S has it. It’s basically useless. 😢
@moficodes Configmaps Kubernetes way of setting env
Mofizur Rahman Senior Developer Advocate, Vonage Work on Client SDKs,
Collect Stickers, Write Go and JS code @moficodes