Kubernetes in Production

How Kubernetes makes it easy for Movio to deploy hundreds of microservices.

Transcript

1. Kubernetes in Production Pavel Jelinek
2. Movio Docker Journey http://movio.co/blog/using-rundeck-for-docker-builds-deployments/
3. Kubernetes • Replicas without worrying about ports • Built-in load balancing • HA • Health-checks • Scheduling based on resource requirements • Volumes and configurations mounting • Central logging • Basic resource monitoring • Better resource utilisation • Pluggable parts
4. Concepts • Pod - one or more containers • Deployment, Daemon set, Pet Set - scaling of Pods • Service - resolvable name, load balancing • ConfigMap, Volume, Secret - Extended Docker volumes
5. Examples • Create Nginx Deployment + Service • Mount ConfigMap with server configuration • Expose Service publicly ◦ through API server ◦ externalIPs ◦ nodePort (single node/all nodes) ◦ loadBalancer • Give them public url • Make it scale with a deployment • Rolling update of all replicas while live
6. Best Practices • Smaller containers are better • Log on container's stdout preferably in json • Test and know your resource requirements • Be aware of node sizes in the cluster • Stateless please • If not stateless then clustered please • Must handle unexpected immediate restarts
7. Examples 2 • Exec • Logs, Central Logging • Add a node • Kill a node? • Monitoring • UI