Graphite & Friends

A talk about Graphite, it’s quirks, some tips for using, xmanaging and scaling it and some systems which integrate with it.

Transcript

1. MONITORING! GRAPHITE and friends
2. Structure ☑ Why I’m here & what I’ll cover ☐ Context ☐ Monitoring ☐ Graphite ☐ Tips ☐ Managing / Scaling ☐ Feeding ☐ Front Ends
3. context
4. Mark Crossfield, @mrmanc http://markcrossfield.co.uk Auto Trader Engineer for 6 years Continuous Delivery & Web
5. Hiring! http://careers.autotrader.co.uk/
6. AWESOME NEW OFFICES
7. page impressions / month 1 billion
8. unique monthly users 14.5 million
9. searches / second at peak 1,500
10. adverts 405k
11. product & technology staff 323
12. servers 2000
13. code bases 250
14. monitoring
15. Velocity 2011 https://www.flickr.com/photos/kellan/5839797269/
16. why? monitor
18. Edward A. Murphy, Jr.
19. Anything that can go wrong will go wrong “ ” — Murphy’s Law
20. design for failure
21. http://blog.tagman.com/2012/03/just-one-second-delay-in-page-load-can-cause-7-loss-in-customer-conversions/ One Second Delay In Page-Load Can Cause 
 7% Loss In Customer Conversions “ ” 47% of consumers expect a page to load in 2 seconds or less “
22. types of
 metric… http://code.flickr.net/2008/10/27/counting-timing/ 3
23. counters easy as pie to aggregate—just sum
24. timers harder to aggregate—need percentiles
 this can make scaling difficult
25. gauges more nuanced—keep last value and use means
26. dos monitoring don’ts &
27. user behaviour monitor
28. business kpis monitor
29. checkouts monitor
30. enquiries monitor
31. user experience monitor
32. page load time monitor
33. user errors monitor
34. major changes monitor
35. servers monitor
36. fine grained monitoring
37. multivariate monitoring
38. death by dashboards
39. staring at charts, not code
40. signal :noise
41. nothing mean means
42. percentiles
43. inquisition the graphite
45. “spikes”
46. Monitoring != Alerting
47. ! ! ! ! ! Alerting is complicated
48. ! ! ! ! ! Alerting Repeat Delay
49. ! ! ! ! ! Alerting Cross Host Roll Up
50. ! ! ! ! ! Alerting Thresholds
51. ! ! ! ! ! Alerting Three Sigma Thresholds
52. ! ! ! ! ! Alerting Aberration Detection
53. ! ! ! ! ! Alerting Acknowledgement
54. ! ! ! ! ! Alerting Escalation
55. ! ! ! ! ! Alerting Sample Size
56. ! ! ! ! ! Alerting Timeshift
57. ! ! ! ! ! AlertingSMS
58. ! ! ! ! ! Alerting Email
59. ! ! ! ! ! Alerting Warn
60. ! ! ! ! ! Alerting Error
61. ! ! ! ! ! Alerting Priority
62. ! ! ! ! ! Alerting Scheduling
63. ! ! ! ! ! Alerting Subscription
64. ! ! ! ! ! Alerting Management
65. graphite
67. Die, composer. Die.
68. THESE ARE NOT THE DOCS YOU ARE LOOKING FOR
69. Docs Moved
70. Old, out dated docs New docs
71. Graphite Architecture
72. aggregation precision reduces over time One year : daily One month: hourly One week: 5min One day: min
73. tips mostly plagiarised
74. writing twice overwrites carbon does no aggregation for you
75. feeding interval == graphite bucket this is no coincidence
76. xFilesFactor sparse metrics might not appear http://obfuscurity.com/2012/04/Unhelpful-Graphite-Tip-9
77. carbon limits writing new metrics avoids swamping disk with write IO http://obfuscurity.com/2012/04/Unhelpful-Graphite-Tip-9
78. graphite bookmarklet useful to load charts from images if your Graphite version is behind the times http://obfuscurity.com/2012/04/Unhelpful-Graphite-Tip-2
79. timeShift(series, duration) e.g. show yesterday’s metric against today’s timeShift(“apache.http.requests”, “-1day”) http://graphite.readthedocs.org/en/0.9.12/functions.html#graphite.render.functions.timeShift
80. groupByNode(series, node, aggregate) e.g. aggregate many series using one node groupByNode(“collectd.*.cpu.*.value”, “2”, “maxSeries”) http://graphite.readthedocs.org/en/0.9.12/functions.html#graphite.render.functions.groupByNode
81. cumulative(seriesList) show how a rate (e.g. per sec) adds up over the day http://graphite.readthedocs.org/en/0.9.12/functions.html#graphite.render.functions.cumulative
82. host.cpu-[0-7].cpu-{user,system}.value wild cards allow filtering of nodes http://graphite.readthedocs.org/en/0.9.12/terminology.html#term-series-list
83. teatime is 4pm Graphite understands the UNIX At time specification e.g. noon yesterday, now-2weeks http://oss.oetiker.ch/rrdtool/doc/rrdfetch.en.html#IAT_STYLE_TIME_SPECIFICATION
84. monitor carbon carbon records it’s own metrics per minute to graphite http://obfuscurity.com/2012/06/Watching-the-Carbon-Feed
85. whisper-*.py create, dump, fetch, info, merge, resize, set-aggregation method, update, diff https://github.com/graphite-project/whisper
86. summarize be suspicious cautious around aggregation boundaries http://graphite.readthedocs.org/en/0.9.12/functions.html#graphite.render.functions.summarize
87. holt winters intelligent aberration detection http://graphite.readthedocs.org/en/0.9.12/functions.html#graphite.render.functions.holtWintersAberration
88. events(*tags) number of events matching tags at this point in time use to annotate your charts e.g. events(“deploy”, “change”) http://graphite.readthedocs.org/en/0.9.12/functions.html#graphite.render.functions.events
91. managing / scaling
92. sqlite do not run in production
93. sqlite migrating from is horrendous
94. sqlite scaling doesn’t work
95. manage.py helps you migrate django https://docs.djangoproject.com/en/dev/ref/django-admin/
96. scale with one box while you can…
97. Graphite Architecture
98. relay distributes to many caches
99. sharding relay distributes with consistent hashing
100. scaling with sharding requires rebalance
103. metrics relayed / minute 300,000
104. logster metrics 30,000
105. write iops / second / cache (~8% of total activity) 8,000
106. metrics to date 193,000
107. carbon docs leave a lot to be desired
108. blogs only slightly contradictory
109. http://bitprophet.org/blog/2013/03/07/graphite/
110. https://gist.github.com/obfuscurity/63399584ea4d95f921e4
111. https://answers.launchpad.net/graphite/+question/178969
112. http://grey-boundary.com/the-architecture-of-clustering-graphite/
113. carbonate provides missing bits of carbon to assist scaling https://github.com/jssjr/carbonate
114. carbon > whisper > mega carbon ceres coming in graphite v0.10
115. graphite-api without the front end https://github.com/brutasse/graphite-api functional goodness
116. @obfuscurity great blogger and an authority on graphite http://obfuscurity.com/
117. synthesize vagrant environment to experiment with https://github.com/obfuscurity/synthesize
118. pip apparently easy installation
120. feeding need input
121. label your axes, before it is too late talk about units, frequencies, and include in the metric name
122. Logster don’t let it be your golden hammer https://github.com/etsy/logster
123. mmmmm python.
124. logster invocations / minute 2,700
125. lines parsed / second 11,000
126. parsers process log deltas when invoked
127. MetricLogster generalised log format for counts, times & gauges
128. METRIC_COUNT metric=web.searches value=1
 METRIC_TIME metric=web.search_time value=12ms
129. statsd aggregates metrics in real time and sends to graphite
130. scaled / ha? you’ll need to distribute and mirror the packets yourself
131. event streaming consider something like reimann to decouple https://github.com/jdmaturen/reimann
132. collectd can collect and send server metrics to graphite
133. community actively producing lots of collectd plugins apache, cpu, memory, disk etc
134. 10s Frequency! be careful that collectd doesn’t flood graphite
135. metrics by coda hale.
136. http://metrics.codahale.com/
137. graphite support, along with ganglia, slf4j etc
138. instrument your java components.
139. aggregates timers, histograms etc
140. no statsd unless you need cross host aggregation
141. awesome actually this is and we really ought to use it
142. front ends
143. image api for individual charts
144. http://grafana.org/
145. no backend awesome concept, better with elastic search
146. replaces composer graphite expression parser and builder
147. interactive explore values, apply filters
148. time synchronized windows across charts
154. demo ask me later for a
155. tasseo quick and simple ruby dashboard https://github.com/obfuscurity/tasseo
156. http://shopify.github.io/dashing/
157. Skyliner Oculus = Etsy Kale Anomoly detection Corrolation http://codeascraft.com/2013/06/11/introducing-kale/ &
158. http://zachholman.com/posts/slide-design-for-developers/
159. QUESTIONS?
160. MONITORING!
161. ! Dublin? http://monitorama.eu/#speakers Portland. http://monitorama.com/#speakers