etcd @ ContainerCon 2015

Transcript

1. @brandonphilips @coreoslinux
2. About Me CTO/CO-FOUNDER systems engineer @brandonphilips github.com/philips
3. @coreoslinux
4. ORIGINAL PHOTO (CC) BY IAN KLUFT @tectonicstack
5. https://github.com/philips/hacks/tree/master/etcd-demos
6. etcd
7. /etc distributed
8. open source software failure tolerant durable watchable exposed via HTTP runtime reconfigurable
9. Data Store API -X GET Get Wait -X PUT Put Create CAS -X DELETE Delete CAD
10. Leader Follower etcd Cluster
11. Applications locksmith
14. Cluster Wide Reboot Lock 1. Need reboot to reboot? Decrement the semaphore key atomically with etcd. 2. manager.Reboot() and wait... 3. After rebooting increment the semaphore key in etcd atomically.
15. Applications vulcan, confd and skydns
16. Applications kubernetes
17. You Scheduler API Scheduler Machine(s)
18. Cluster Work Scheduling 1. Cluster API writes desired work into etcd keyspace. 2. Agents running on individual machines pick up work assigned to them. 3. Agents report where work is running and current status.
19. etcd basics clusters and bootstrapping
20. Leader Follower etcd Cluster
21. Availability In a 2F+1 cluster tolerate F machine failures
22. Available
23. Available
24. Available
25. Unavailable
26. Master Election Fast recovery (5-10*typical RTT) from temporarily unavailable
27. Available Leader Follower
28. Leader Follower Available
29. Leader Follower Temporarily Unavailable
30. Leader Follower Available
31. Durable log files, snapshots and backups
32. bootstrapping Candidate
33. GET discovery.etcd.io/new
34. discovery.etcd.io/6eadeac2 6eadeac2d
35. 6eadeac2d/state CREATE
36. 6eadeac2d/state Key Value Index state started 5890 n0 10.0.2.1 5891 n1 10.0.2.4 5898 ...
37. bootstrapped Leader Follower
39. Introduces gRPC backed API More efficient handling of events Non-blocking snapshots Better read performance when contention is high
40. Thanks we like pull requests github.com/coreos/etcd