introducing kubernetes clusters in rancher - february 2016 online meetup

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Introducing Kubernetes Environments in Rancher

February 25, 2016

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Shannon WilliamsCo-Founder/VP Marketing @smw355

Darren ShepherdCo-Founder/Chief Architect @ibuildthecloudFreenode: darren0

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First things first…

This is a not a !

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There are rules for a meetup!• We won’t be done on time• Questions are always welcome• There are no bad questions• Demo, then demo some more• Things will break, be patient

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Join the conversation on Twitter #ranchermeetup

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Agenda• Introducing Kubernetes Environments in Rancher – Shannon• Demo: Launching a Kubernetes Environment – Darren• Demo: Deploying an Application on Kubernetes – Darren• Latest Rancher Updates – Darren

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Rancher Labs

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Rancher OverviewRancher Catalog

AD/LDAP

Alerts/Events

Environment 1 Environment N…Network Services Storage Services

Container Orchestration and SchedulingUser Mgmt Ops Mgmt

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Introducing Kubernetes Environments in Rancher

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KubernetesKubernetes is open source software for managing a cluster of servers and deploying applications.• Started by Google, but widely contributed to at

this point• Latest version is 1.2• Powerful app management concepts• First project contributed to the Cloud Native

Computing Foundation (CNCF)• Kubernetes.io

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Native Kubernetes support in Rancher

• Automated deployment of an unlimited number of Kubernetes clusters

• Control user access to Kubernetes clusters• Simple to use UI for Kubernetes• Supports cross zone, cloud or datacenter

deployments• Node provisioning through Docker Machine• Access Rancher services including:

- Multi-host Networking- Load Balancer- Application Catalog- Persistent Storage Services- Metadata Service

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Inside a Rancher Kubernetes Environment

Environment A

apiserver

etcd

scheduler

controller

kubelet

proxy

dns service

metadata service

network agent

system services

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• Pods are the smallest unit in Kubernetes

• Each pod is a group of tightly coupled containers and volumes

• Unique ID, allocated to a specific host.

• Rancher allocates a private IP on the rancher network to each pod

Kubernetes Pods

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• Replication Controllers define the number of copies of a pod that are launched.

• RCs are managed by the Kubernetes controller, which works with the scheduler to achieve the desired state.

Kubernetes Replication Controllers

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Inside a Rancher Kubernetes Environment

system services

Environment A

replication controller containerpods pods

containerapp2

containerpods pods pods

container containerreplication controllerapp1

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• Services in Kubernetes typically define a cluster IP for a group of pods

• Cluster IPs are on a separate subnet from the pod IPs.

Kubernetes Services

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Inside a Rancher Kubernetes Environment

system services

Environment A

replication controller containerpods pods

containerapp2

containerpods pods pods

container containerreplication controllerapp1

Pod IP10.42.x.x

Pod IP10.42.x.x

Pod IP10.42.x.x

Pod IP10.42.x.x

Pod IP10.42.x.x

Service IP10.43.x.x

service

service

Service IP10.43.x.x

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• Simple web access to Kubectl for running any Kubernetes commands.

• Leverage Rancher users and authentication to control access to Kubectl.

Full access to Kubectl

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Demo

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Latest Rancher Enhancements

20

0.56• Improved Rancher Managed Network• UI Enhancements• Health Check Action Strategies• Rancher Metadata Service Update

0.59• Support Retaining Container IP on container upgrade or

destroy• Added support for Docker 1.10• Split Rancher Catalog into Library & Community

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http://info.rancher.com/beta

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Getting StartedRancher and RancherOS are in GitHub – Get Involved, Join the Beta

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http://github.com/rancher

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New eBook: Building a CI/CD Pipeline with Docker & Rancher

http://info.rancher.com/cicd-with-docker-ebook

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Thank yourancher.com

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