Basic Ops Skills and Tools for Beginners

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Your datastore, MongoDB, is likely critical to your project; if you're new to MongoDB or Ops and have to keep things running in production this is the talk for you. We will cover Ops with MongoDB from the ground up; which parts of servers you should monitor and why, and show how to take and test backups. Also, we'll run through different tools you can use for installing, running, and monitoring MongoDB. After this you should be comfortable with the basics of running MongoDB in production, as well as have a head start on what you should do next.

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Basic Ops Skills and Tools for Beginners

  1. 1. rainforest @rainforestqa Ops Skills and Tools for Beginners
  2. 2. Russell Smith ! English guy Mongo DB Master Ex Ops consultant Ruby / PHP developer YC S12 Alum Using mongo in Prod since 1.6/1.8
  3. 3. @rainforestqarainforest Rainforest QA ! Insanely simple testing checkout: www.rainforestqa.com
  4. 4. What is Ops?
  5. 5. @rainforestqarainforest Setting up servers / services
  6. 6. @rainforestqarainforest Supporting Engineers
  7. 7. @rainforestqarainforest Keeping stuff running
  8. 8. @rainforestqarainforest Avoiding disasters
  9. 9. @rainforestqarainforest Fixing breakage
  10. 10. Lets Learn the basics
  11. 11. Installation
  12. 12. @rainforestqarainforest Replicated
  13. 13. @rainforestqarainforest Sharded
  14. 14. @rainforestqarainforest Best practices Ubuntu is simplest Install from Mongo’s repo Chose the right replica set size: 3 nodes Never use 32 bits
  15. 15. @rainforestqarainforest Alternatives MongoHQ MonogLab ObjectRocket MMS + AWS (via automation)
  16. 16. Monitoring Mongo
  17. 17. @rainforestqarainforest Server components
  18. 18. @rainforestqarainforest Storage magnetic, ssd metric: disk io
  19. 19. @rainforestqarainforest Memory / RAM fastest general store metrics; free, swap usage
  20. 20. @rainforestqarainforest Network allows communication use 1gbit or higher (avoid 100mbit) metrics; latency, throughput
  21. 21. @rainforestqarainforest CPU more is better mostly used metrics; % usage
  22. 22. @rainforestqarainforest Monitoring & Diagnostics
  23. 23. @rainforestqarainforest Top things to monitor Failover events Repl Lag Connections Lock % Disk usage
  24. 24. @rainforestqarainforest Hosted is Simplest
  25. 25. MMS Hosted, free for monitoring ! Also can do Backups Automation
  26. 26. Scout Monitors mongo, servers and many others (Plugins!) ! non-free
  27. 27. Server Density Monitors mongo, servers and many others (Plugins!) ! non-free
  28. 28. @rainforestqarainforest Opensource options Ganglia Munin Nagios Zabbix
  29. 29. Linux tools to learn mongostat / mongotop top iostat vmstat netstat
  30. 30. @rainforestqarainforest Mongo shell rs.conf() rs.status() db.serverStatus() db.stats() db.currentOp()
  31. 31. @rainforestqarainforest Backups
  32. 32. @rainforestqarainforest Backup options mongodump from the file system LVM / EBS MMS
  33. 33. @rainforestqarainforest TEST YOUR BACKUPS
  34. 34. Common pitfals
  35. 35. Missing indexes! Running out of disk space Untested backups Sharding too late / wrong key un-replicated / even set size
  36. 36. @rainforestqarainforest Conclusion do backups monitor read the docs
  37. 37. rainforest @rainforestqa Questions? @rainforestqa @rhs
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