DeveloperWeek - Daatabases on Kubernetes

Transcript

1. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. DATABASES ON KUBERNETES Denis Rosa | Developer Advocate @deniswsrosa @deniswsrosa WHY YOU SHOULD CARE
2. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. • +15 years as a dev • NoSQL & Java specialist • OSS contributor Denis Rosa deniswsrosa @deniswsrosa denis.rosa@couchbase.com
3. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 3 2016
4. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa 2016 Containers are designed to be stateless
5. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa Fast forward to 2020…
6. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 6 2020
7. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa What have changed?
8. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa • Production-Grade Images • Easier to setup and configure • Separate storage from compute • Kubernetes and StatefulSets …
9. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 9 Simple MySQL Deployment
10. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa Databases typically have numerous tuning parameters, a new immutable container image for every possible database configuration can quickly result in image sprawl.
11. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa Where should I store my database config files? Problem 1:
12. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. DEMO1 – A K8S TODO LIST
13. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 13 K8 CRDs
14. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 14 Let’s go back to the MySQL Deployment
15. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa K8S Worker1 MySQL Volume MYSQL DEPLOYMENT
16. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa K8S Worker1 MySQL Volume FAILURE SCENARIOS
17. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa K8S Worker1 MySQL Volume MySQL Volume FAILURE SCENARIOS
18. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa K8S Worker1 MySQL Volume MySQL Volume FAILURE SCENARIOS
19. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa K8S Worker1 MySQL Volume K8S Worker2 MySQL Volume FAILURE SCENARIOS
20. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa K8S Worker1 MySQL Volume K8S Worker2 MySQL Volume FAILURE SCENARIOS
21. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa K8S Worker1 MySQL Volume K8S Worker3 MySQL Volume (empty) FAILURE SCENARIOS ?
22. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa Looks like something is missing…
23. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa How to manage state in containers? Problem 2:
24. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 24 K8 CRDs Events
25. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 25 CRDs + K8s Operators
26. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 26 Java Operator - Example Source: https://developers.redhat.com/blog/2019/10/07/write-a-simple-kubernetes-operator-in-java-using-the-fabric8-kubernetes-client/
27. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. @deniswsrosa K8S Worker1 Couchbase Volume K8S Worker2 Couchbase Volume OPERATORS + KUBERNETES Operator (stateless)
28. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 28 Quick Operator Revision Operator Knowledge from app experts Deployments Autoscaling StatefulSets Configs
29. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 29 K8s Database Operators Provide a cloud agnostic Database-as-a-Service solution
30. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. DEMO 2 – LET’S PLAY WITH A DATABASE ON KUBERNETES
31. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 31 Other Possibilities Automated Backup XDCR Prometheus Metrics
32. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 32 DBaaS vs Databases on K8S • Easy; • Low TCO for small/medium workloads*; • Lacks flexibility*; • Average performance; DBaaS DB on K8S • Still requires some K8s knowledge; • Same flexibility as bare metal; • Operators can automate most of the hard work; • One of the best options for databases with large number of nodes; • Potentially the default option in the near future;
33. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 33 DBaaS
34. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 34 Kubernetes Storage https://github.com/brianfrankcooper/YCSB/wiki/Core-Workloads Ephemeral Remote Persistent Local Persistent Easiest one, but you lose all data if the pod gets killed. Latency limits the performance of applications with intensive read/write profiles or distributed datastores Not a general-purpose storage solution
35. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 35 Local Persistent Storage https://github.com/brianfrankcooper/YCSB/wiki/Core-Workloads
36. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 36 Local vs Remote Persistent Storage
37. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 37 Bare Metal Vs Containers https://github.com/brianfrankcooper/YCSB/wiki/Core-Workloads Yahoo! Cloud Serving Benchmark YCSB includes a set of core workloads that define a basic benchmark for cloud systems
38. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 38 Workload A https://blog.couchbase.com/performance-certification-of-couchbase-server-5-5-on-kubernetes-platform/ Workload A Update heavy workload: Mix of 50/50 reads and writes Workload E Short ranges: Short ranges of records are queried, instead of individual records. ~0% No substantial difference <10% Performance penalty * These test where made ~1/5 years ago, since then, many improvements have been added to docker
39. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 39 Workload A https://blog.couchbase.com/performance-certification-of-couchbase-server-5-5-on-kubernetes-platform/
40. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 40 Workload E https://blog.couchbase.com/performance-certification-of-couchbase-server-5-5-on-kubernetes-platform/
41. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 41 Key Takeaways https://blog.couchbase.com/performance-certification-of-couchbase-server-5-5-on-kubernetes-platform/ • DBaaS vs Databases on K8s; • Pick a good operator first before running your database on Kubernetes; • Add extra memory/cpu while running on containers; • Local over Remote persistent storage;
42. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. 42 Other Operators @deniswsrosa
43. Confidential and Proprietary. Do not distribute without Couchbase consent. © Couchbase 2017. All rights reserved. THANKS! @DENISWSROSA