Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Visibility for web developers
Search
Bruno Renié
May 13, 2014
Technology
3
450
Visibility for web developers
Bruno Renié
May 13, 2014
Tweet
Share
More Decks by Bruno Renié
See All by Bruno Renié
Decentralization & real-time with PubSubHubbub
brutasse
1
150
Deployability of Python Web Applications
brutasse
17
2.3k
Stop writing settings files
brutasse
21
2.6k
Class-based Views: patterns and anti-patterns
brutasse
9
1.6k
Packager son projet Django
brutasse
4
560
Staticfiles : tout ce qu'il faut savoir, rien que ce qu'il faut savoir
brutasse
4
540
Introduction to Django
brutasse
3
420
Other Decks in Technology
See All in Technology
DataOpsNight#8_Terragruntを用いたスケーラブルなSnowflakeインフラ管理
roki18d
1
320
Function calling機能をPLaMo2に実装するには / PFN LLMセミナー
pfn
PRO
0
820
ユニットテストに対する考え方の変遷 / Everyone should watch his live coding
mdstoy
0
120
VCC 2025 Write-up
bata_24
0
150
Oracle Cloud Infrastructure:2025年9月度サービス・アップデート
oracle4engineer
PRO
0
360
Windows で省エネ
murachiakira
0
150
研究開発部メンバーの働き⽅ / Sansan R&D Profile
sansan33
PRO
3
20k
GA technologiesでのAI-Readyの取り組み@DataOps Night
yuto16
0
260
成長自己責任時代のあるきかた/How to navigate the era of personal responsibility for growth
kwappa
3
230
SwiftUIのGeometryReaderとScrollViewを基礎から応用まで学び直す:設計と活用事例
fumiyasac0921
0
120
OpenAI gpt-oss ファインチューニング入門
kmotohas
2
850
全てGoで作るP2P対戦ゲーム入門
ponyo877
3
1.3k
Featured
See All Featured
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
252
21k
It's Worth the Effort
3n
187
28k
Building Adaptive Systems
keathley
43
2.8k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
33
2.4k
Principles of Awesome APIs and How to Build Them.
keavy
127
17k
Unsuck your backbone
ammeep
671
58k
CSS Pre-Processors: Stylus, Less & Sass
bermonpainter
358
30k
Site-Speed That Sticks
csswizardry
11
870
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
9
950
Dealing with People You Can't Stand - Big Design 2015
cassininazir
367
27k
How to train your dragon (web standard)
notwaldorf
96
6.3k
Bootstrapping a Software Product
garrettdimon
PRO
307
110k
Transcript
Visibility for Web Developers Bruno Renié Django Island 2014
Working with ops & support staff Large infrastructure, lots of
moving parts whoami: lead dev @ exoscale
People need to know what's going on, anytime Not everyone
is a developer SSH, grep and tail not acceptable
Goal: visibility on infrastructure & apps
Errors Events Metrics
Errors
Easy: use sentry
Great tool for developers, but… People also need to know
about things that are not broken
Events
Event == log call Timestamped information about something worth knowing
Easy to emit logs Searching on remote machines, not so
much
Centralized logging Agent forwards logs to an aggregator Aggregator stores
logs and provides a search interface
Aggregator Hosts logstash+elasticsearch kibana log shippers
Collecting logs rsyslog / syslog-ng logstash-forwarder (lumberjack) logstash
In Python logging.handlers.SyslogHandler
Centralizing isn't enough
A common way to log things import logging logger =
logging.getLogger(__name__) logger.info("user {} logged in".format(user.email))
Not much information No structure
Structured logging Record = set of key-value pairs event="user logged
in" user="
[email protected]
" ip="1.2.3.4"
In Python: pip install structlog Hynek Schlawack logger = structlog.get_logger()
logger.info("user logged in", user="
[email protected]
" ip="1.2.3.4") {"event": "user.login", "user": "
[email protected]
", "host": "1.2.3.4"}
Contextual loggers log = logger.bind(user=request.user.email) log.info("payment", amount=120, currency="CHF") {"event": "payment",
"user": "
[email protected]
", "amount": 120, "currency": "CHF"}
structlog JSON elasticsearch Rich data for building dashboards
Demo
Marketing: "Who signed up today?" Finance: "How much income in
the past week?" Support: "What did this user do in the past 24 hours?"
Events Centralize logs Add structure Profit logstash, elasticsearch structlog kibana
Metrics
Time series data Continuous, regular intervals Big player: graphite ecosystem
carbon whisper graphite
<identifier> <value> <timestamp> db1.load.midterm 4.6 1399842778 Measure at regular intervals,
send using the carbon line protocol echo " … " | nc host port
Traditional metrics stack agents collectd, apps, scripts carbon whisper graphite
ingests metrics stores metrics renders graphs
Counting and timing: statsd In-memory buffer Aggregates and flushes to
carbon at regular intervals
In Python pystatsd django-statsd-mozilla from stastd import StastClient statsd =
StatsClient() @statsd.timer("something") def expensive_computation(): # …
Graphing Graphite: rendering API (json / PNG / etc) Countless
dashboard apps Grafana Graph-explorer etc
Demo
What about alerts? Riemann: metrics hub/proxy App server overloaded, full
disk, etc Analyzes metrics computes aggregates notifies
Demo
we are hiring! Questions! @brutasse Image credits: http://en.wikipedia.org/wiki/Explosion
Resources Events Metrics structlog.org rsyslog logstash elasticsearch kibana carbon /
whisper graphite-api grafana collectd statsd riemann.io bernhard
Hosted services (not exhaustive) Logging Metrics Loggly Papertrail Hosted Graphite
Librato JSON / structured logging support?