Greek for "Helmsman"
Runs and manage containers
Inspired and informed by Google's experiences
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Support multiple cloud and bare-metal
environments
Supports multiple containers runtimes
100% open source, written in Go
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A group of one or
more containers
co-located,
co-schedule,
run in a shared
context
Pod
Pod
Web Server
Consumers
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contains one or
more application
containers which are
relatively
tightly couple
Pod
File Puller Web Server
Volume
Consumers
Content
Pod
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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
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A given pod is not rescheduled
Relatively ephemeral entities
Life of a Pod
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Ensures a specify number of pods "replicas"
e.g. process supervisor
Replica Set
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Identify attributes of objects that are
meaningful and relevant to users
Can be used to Organize and
to select subject of objects
Labels
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Equality-based
requirement
Set-based
requirement
Label Selector
env = production
tier != web
env in (production, qa)
tier notin (web, worker)
tenant
!tenant
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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
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Provides declarative updates for
Pods and Replica Sets
Describe the desired state
Deployment
Namespaces
Secrets
ConfigMaps
HPA
Ingress Resources
Jobs
DaemonSets
Cron Jobs
Volumes
Persistent Volumes
Resource Quotas
Network Polices
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Security Context
Pod Security Polices
Service Accounts
RBAC
Third Party Resources
Node affinity and
anti-affinity
Multi-scheduler
support
Device scheduling
(e.g. GPUS)