Videos / DevOps

Episode 8 of 14 · DevOps, end to end

Kubernetes, part one: the objects, and the loop that reconciles them

Chapters

1. The target, and the loop0:00
2. Desired, and actual0:16
3. Watch, compare, act0:32
4. Spec, and status0:48
5. Apply is only a write1:04
6. Delete one, watch it return1:20
7. Two kinds of machine1:35
8. The only door1:52
9. One place the truth lives2:08
10. Filter, score, bind2:25
11. One binary, many loops2:42
12. The whole path of one pod3:01
13. The smallest thing it runs3:20
14. One address, one lifetime3:37
15. When a second container earns it3:56
16. Before anything starts4:13
17. A pod is never repaired4:30
18. The two probes people swap4:47
19. Two controllers, stacked5:06
20. The count, and only the count5:25
21. Two ReplicaSets at once5:43
22. The two dials6:00
23. Ready is the gate6:20
24. The old one is kept6:38
25. An address that outlives it6:57
26. The list behind the name7:15
27. Nothing listens on that address7:33
28. Three ways in, stacked7:52
29. The name resolves to the rule8:12
30. One door for many services8:33
31. The image is the constant8:53
32. Two ways in, not equal9:13
33. Editing config changes nothing9:31
34. Base sixty four is not encryption9:51
35. An identity, not a stored secret10:10
36. It was one loop the whole time10:31
37. Declare, then wait10:48

Kubernetes, part one: the objects, and the loop that reconciles them. A thermostat has one job. You set a number, and it keeps working until the room matches it. You never tell it to switch the heater on. Kubernetes is that idea applied to running so

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