CloudAnts - Kubernetes
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- 2. / 30 Hello! CloudAnts - Managed Hosting info@netants.nl Produktieweg 1 - Roermond 085-4868840 Aron Beurskens - Founder aron@netants.nl 06-51791756 https://nl.linkedin.com/in/aronbeurskens 2
- 3. / 30 CI / CD Managed hosting DevOps consultancy Managed Kubernetes 3
- 4. / 30 What is this talk about? 4
- 7. / 30 What is this talk about? - Basic understanding of kubernetes - Docker images and docker-compose - Gitlab pipelines - Deployment to kubernetes cluster - Application fine tuning in k8s cluster 7
- 8. / 30 What is this talk not about? - Setting up a k8s cluster - Administrating a k8s cluster - Monitoring k8s 8
- 9. / 30 Agenda - K8S Core Objects - Creating a containerized application - Running our application - Creating gitlab pipeline to build our application 9
- 10. / 30 K8S Objects “Kubernetes Objects are persistent entities in the Kubernetes system. Kubernetes uses these entities to represent the state of your cluster” “A Kubernetes object is a “record of intent”” “By creating an object, you’re effectively telling the kubernetes system what you want your clusters workload to look like; this is your clusters desired state.” “Most often, you provide the information in a .yaml file” 1
- 11. / 30 K8S Objects - Namespace - Provides a scope for names - Each k8s resource can only be in 1 namespace $ kubectl get namespaces 1
- 12. / 30 K8S Objects - Pod - A colocated group of container - Can contain a single container - Share ip-address (also localhost) and port namespace - Share volumes - K8S scales the pods, not the containers $ kubectl get pods --all-namespaces 1
- 13. / 30 K8S Objects - Service - An way to expose an application internally - Pods are mortal and constantly get different ip addresses - A service targets pods by selector $ kubectl get service --all-namespaces 13
- 14. / 30 K8S Objects - Ingress - Exposes HTTP and HTTPS routes - Routes the outside to services - Controlled by rules $ kubectl get ingresses --all-namespaces 14
- 15. / 30 K8S Objects - Deployment - Provides declarative updates for pods and replicasets $ kubectl get deployments --all-namespaces 15 K8S Objects - ReplicaSet - A ReplicaSet maintains a stable set of pods $ kubectl get rs --all-namespaces
- 16. / 30 K8S Objects - Job - Runs a command until completed - Removes pods when completed - Can run in parallel $ kubectl get jobs --all-namespaces 16
- 17. / 30 K8S Objects - CronJob - Creates Jobs on a time-based schedule $ kubectl get cronjobs --all-namespaces 17
- 18. / 30 Demo - Setup demo application in docker - Create namespace - Create pod deployment - Create services - Create ingress 18
- 19. / 30 Demo - Build app and push to registry - Speed up build process - Helm charts 19
- 20. / 30 Helm - https://helm.sh - Package manager for kubernetes - Define, install and upgrade - Public helm repositories - Jobs and Cronjobs 20
- 21. / 30 Extra - NGINX snippets - Multi containers under 1 domain and url structure - Review app based on feature branches - Using gitlab secrets 21
- 23. / 30 Until next time? 23