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Kubernetes - The new platform
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Raúl Naveiras
January 04, 2017
Technology
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Kubernetes - The new platform
Asturias Hacking - Jan 2018
Raúl Naveiras
January 04, 2017
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Transcript
Kubernetes the new platform
Raúl Naveiras @rnaveiras /
[email protected]
/ bebanjo.com
Obligatory Background
Image by Connie Zhou
None
Greek for "Helmsman" Runs and manage containers Inspired and informed
by Google's experiences
Support multiple cloud and bare-metal environments Supports multiple containers runtimes
100% open source, written in Go
A group of one or more containers co-located, co-schedule, run
in a shared context Pod Pod Web Server Consumers
contains one or more application containers which are relatively tightly
couple Pod File Puller Web Server Volume Consumers Content Pod
Pods have IPs which are routable No brokering of port
numbers Pod 10.1.3.17 Pod Networking Pod 10.1.2.4 Pod 10.1.1.21
A given pod is not rescheduled Relatively ephemeral entities Life
of a Pod
Ensures a specify number of pods "replicas" e.g. process supervisor
Replica Set
Identify attributes of objects that are meaningful and relevant to
users Can be used to Organize and to select subject of objects Labels
Equality-based requirement Set-based requirement Label Selector env = production tier
!= web env in (production, qa) tier notin (web, worker) tenant !tenant
A logical grouping of pods that perform the same function
It has a unique stable Virtual IP Service Pod Pod Pod Service Client VIP tier = web tier = web tier = web label selector: tier = web
Provides declarative updates for Pods and Replica Sets Describe the
desired state Deployment
Demo
High Level Design nodes master users kubelet kubelet kubelet kubectl
etcd apiserver scheduler controller manager
Namespaces Secrets ConfigMaps HPA Ingress Resources Jobs DaemonSets Cron Jobs
Volumes Persistent Volumes Resource Quotas Network Polices
Security Context Pod Security Polices Service Accounts RBAC Third Party
Resources Node affinity and anti-affinity Multi-scheduler support Device scheduling (e.g. GPUS)
Federation k8s cluster usa-3 k8s cluster asia-2 k8s cluster europe-1
federation control plane
Kubernetes 1.5
Improve Federation Support StatefulSet Simplified Cluster Deployment Node Robustness and
Extensibility
None
We're hiring http://bebanjo.com/careers
Thanks!