Kubernetes Master Class - Use persistent storage In Kubernetes and Project Longhorn.pptx

Kubernetes Master Class - Use persistent storage In Kubernetes and Project Longhorn.pptx

1. July 16, 2019 #Rancherk8s Use persistent storage In Kubernetes and Project Longhorn Kubernetes Master Class Series

2. Matthew Scheer Marketing Manager     @ matthew_scheer [email protected] Sheng Yang Software Architect / / : @ yasker #RancherK8s

3. Rancher Master Class Series: Trying to keep this to 40-45 minutes Questions are always welcome Use the questions tab to write your questions We may respond to all, so mark your question as private if needed. #Rancherk8s

4. This session is being recorded! http://youtube.com/c/rancher #Rancherk8s

5. Join the conversation on Slack http://slack.rancher.io #masterclass #RancherK8s

6. Upcoming Classes http://rancher.com/kubernetes-master-class/ #RancherK8s

7. Agenda Persistent storage concepts in Kubernetes RWO vs RWX, Deployment vs StatefulSet Distributed Block Storage Software: Longhorn #RancherK8s

8. Persistent storage in Kubernetes Persistent Volume Persistent Volume Claim Storage Class Provisioner Volume

9. Persistent storage in Kubernetes before StorageClass PVC PV PVC PV PVC PV PVC PV POD Volume Volume POD Volume POD Volume Admin

10. Persistent storage in Kubernetes after StorageClass PVC PV PVC PV PVC PV PVC PV POD Volume Volume POD Volume POD Volume Storage Class with Provisioner

11. Read-Write-Once (RWO) vs Read-Write-Many (RWX) Read-Write-Once type storage only can be read/write on one node at any given time High performance block device AWS EBS, Azure Disk, Google Persistent Disk, Ceph RBD, Longhorn Read-Write-Many type storage can be read/write on multiple nodes at the same time Distributed Filesystem AWS EFS, NFS, GlusterFS , CephFS

12. Deployment vs StatefulSet Pods in one Deployment share the same volume No matter which node the pod runs on Better suit for RWX type storage Each Pod in one StatefulSet can have one volume VolumeClaimTemplate Better suit for RWO type storage

13. Open Source Distributed Block Storage Software For Kubernetes https://github.com/rancher/longhorn/ Add persistent storage support to any Kubernetes cluster kubectl apply –f longhorn.yaml

14. Latest release: Longhorn v0.5.0 Enterprise-grade distributed block storage software for Kubernetes Volume snapshots Volume backup and restore Live upgrade of Longhorn software without impacting running volumes Cross-cluster disaster recovery volume with defined RTO and RPO Intuitive UI One click installation And more features are coming QoS, volume resizing, real time performance monitoring, et cetera.

15. Longhorn Architecture - Engine Pod 3 Engine Replica Replica Pod 1 Engine Replica Replica Pod 2 Engine Replica Replica Volume Volume Volume Node 1 Node 2 Orchestrated by Kubernetes

16. Longhorn Architecture - Manager Longhorn UI Kubernetes Cluster Longhorn Manager (Orchestrates all the volumes) Longhorn API Longhorn API Engine Replica 1 Replica 2 Engine Replica 1 Replica 2 Engine Replica 1 Replica 2 Kubernetes API Server … Longhorn CSI Plugin Container Storage Interface API

17. Demo

18. Upcoming Longhorn v0.6.0 (Beta) Re-architecture Engines and replicas would be run as processes inside the DaemonSet Pods Instead of one pod for each engine or replica Result Speed up volume attach/detach process No more worry about Pod per node limitation Guaranteed resource for DaemonSet Pods Storage Pool support

19. Thank you @ Rancher_Labs   ·   #Rancherk8s Rancher.com/ kubernetes -master-class