An Overview of Mesos Containerization and the Default Executor

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" summary

Mesos exposes a Unified Container Runtime (UCR (Unified Container Runtime)) that pulls OCI and Docker images, uses CNI and CSI plugins for networking/storage, and runs containers as pure Linux namespaces/cgroups. The default executor (added in Mesos 1.1, executor auth in 1.3) launches task groups as nested containers up to 32 levels, exposing operator HTTP API calls (launch_nested_container, wait_nested_container). It implements health checks via debug nested containers (HTTP/TCP/command), a default “kill whole group on any failure” termination policy, and lacks per-task resource isolation today (roadmap: custom termination, resource isolation, auth).

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" chapters (32)

1. 0:00Intro
2. 1:08History of Meses Containerization
3. 2:34Process based (pre 0.10.0, 2011)
4. 3:28Containerizer and isolators (0.18, 2014)
5. 4:11Docker engine integration (0.20, 2014)
6. 4:52Native Docker image support (0.28, 2016)
7. 6:14Adopting container standards
8. 7:26De facto container standard
9. 8:21We need true container standards!
10. 8:53Ideal world
11. 9:46Standards we need for containers
12. 10:14OCI: Open Container Initiative
13. 11:27Container networking spec
14. 12:21CNI: Container Networking Interface
15. 13:17Mesos supports CNI
16. 14:07Container storage spec
17. 14:45Latest new features
18. 15:15Nested Container
19. 18:16Debug Container
20. 19:20What is an Executor?
21. 21:01Executor API
22. 21:55Types of Executor
23. 24:38Why need Task Groups aka Pods?
24. 26:05Limitations of old APE
25. 29:17Default Executor Features
26. 29:52WORKFLOW
27. 32:46Task Group Lifecycle wrt Default Executar
28. 35:10Health Checks
29. 36:42Probes aka Checks
30. 36:59Executor AuthN
31. 37:34Future Work
32. 38:39Summary

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