Getting Started with Kubernetes and Rancher 2 0

Today’s objectives • Technical introduction to Kubernetes using Rancher • Keep the slides to a minimum • Demo, then demo some more • Questions are always welcome • We won’t leave until all your questions are answered! 1 © 2018 Rancher Labs, Inc.

2 Matthew Scheer Rajashree Mandaogane Community Advocate @matthew_scheer Slack: @matthew Software Engineer Twitter: @rajashree_28

For the purpose of this training, we’re assuming you understand basic Docker concepts…. 3

Resources - docs https: //rancher. com/docs/rancher/v 2. x/en/quick-start-guide/ 4 © 2018 Rancher Labs, Inc.

Resources - forums http: //slack. rancher. io 5 © 2018 Rancher Labs, Inc. http:

Rancher & Kubernetes - better together Open source container manager used to run Kubernetes in production ü Easy-to-use interface for k 8 s configuration and deployment ü Infrastructure management across multiple clusters and clouds ü Automated deployment of the latest k 8 s release ü Workload, RBAC, policy, and project management ü 24 x 7 enterprise-grade support 7 © 2018 Rancher Labs, Inc. Rancher Kubernetes Distribution Certified and supported distribution that closely follows the upstream Kubernetes project Rancher Infrastructure Services Storage, networking, load balancing, security, etc.

Kubernetes 101 ü ü ü 15 Pods Deployments Services Config maps Ingresses © 2018

Pods • • 8 Smallest unit that can be deployed in Kubernetes Consist of one or more containers that are always scheduled together Each pod is given a unique IP address Containers in a pod can speak to each other via localhost © 2018 Rancher Labs, Inc. #rancherk 8 s

Pods are confusing • • • 17 If the explanation is confusing, don’t worry too much Pods typically contain only a single container Try to think of pods as containers for the remainder of the training © 2018 Rancher Labs, Inc. #rancherk 8 s

Replication Controller and Replica Set • • 20 Defines the desired scale and state of a group of pods SOT for driving the current state to the desired state (in controller manager) © 2018 Rancher Labs, Inc.

Replica Set 21 © 2018 Rancher Labs, Inc.

Replica Set 22 © 2018 Rancher Labs, Inc.

Replica Set 23 © 2018 Rancher Labs, Inc.

Deployments • • • 24 Level of abstraction above Replica. Sets Deployments create and

Deployments 25 © 2018 Rancher Labs, Inc.

Deployments 26 © 2018 Rancher Labs, Inc.

Deployments 27 © 2018 Rancher Labs, Inc.

Deployments 28 © 2018 Rancher Labs, Inc.

Deployments 29 © 2018 Rancher Labs, Inc.

Services • • • 30 Define a DNS entry that can be used to refer to a group of pods Provide a consistent endpoint for the group of pods Different types: node. Port, cluster. IP, loadbalancer © 2018 Rancher Labs, Inc. #rancherk 8 s

Services 123. 456. 789 Service IP 31 © 2018 Rancher Labs, Inc.

Config maps • • • 32 Allow storing of arbitrary configuration values and files Exposed in pods as either environment variables or as local storage Decoupled storage of configuration from pod spec © 2018 Rancher Labs, Inc. #rancherk 8 s

Config Maps api. Version: v 1 kind: Config. Map metadata: name: dev-config namespace: default data: Item 1: dev-stuff Item 2: more dev stuff 33 © 2018 Rancher Labs, Inc. api. Version: v 1 kind: Config. Map metadata: name: dev-config namespace: default data: Item 1: qa-stuff Item 2: more qa stuff api. Version: v 1 kind: Config. Map metadata: name: dev-config namespace: default data: Item 1: prod-stuff Item 2: more prod stuff

Ingresses • • 34 Define how traffic outside the cluster is routed to inside the cluster Used to expose Kubernetes services to the world Route traffic to internal services based on factors such as host and path Ingress is usually implemented by a load balancer (Nginx, HAProxy, AWS ELB, etc…) © 2018 Rancher Labs, Inc. #rancherk 8 s