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
The Final Crontab
Search
Selena Deckelmann
May 06, 2014
Technology
3
8.2k
The Final Crontab
About crontabber:
https://github.com/mozilla/crontabber
Selena Deckelmann
May 06, 2014
Tweet
Share
More Decks by Selena Deckelmann
See All by Selena Deckelmann
Our privacy and the web
selenamarie
0
640
Postgres: an intro for new developers
selenamarie
0
190
Alembic and SQLAlchemy: sane schema management
selenamarie
0
240
code4lib - What beginners teach us
selenamarie
0
1.4k
What beginners teach us - New Relic FutureTalk
selenamarie
0
200
Cost of 100% processing and crashstorage options for Socorro
selenamarie
0
160
Socorro, crash-stats.mozilla.com and Postgres
selenamarie
0
330
What beginners teach us - Passion Projects
selenamarie
6
2.2k
Sane Schema Management with Alembic
selenamarie
2
1.4k
Other Decks in Technology
See All in Technology
AIエージェント入門 〜基礎からMCP・A2Aまで〜
shukob
1
160
Implementing and Evaluating a High-Level Language with WasmGC and the Wasm Component Model: Scala’s Case
tanishiking
0
170
ヘンリー会社紹介資料(エンジニア向け) / company deck for engineer
henryofficial
0
330
Oracle Base Database Service 技術詳細
oracle4engineer
PRO
12
81k
NLPコロキウム20251022_超効率化への挑戦: LLM 1bit量子化のロードマップ
yumaichikawa
1
220
「タコピーの原罪」から学ぶ間違った”支援” / the bad support of Takopii
piyonakajima
0
130
Building a cloud native business on open source
lizrice
0
170
あなたの知らない Linuxカーネル脆弱性の世界
recruitengineers
PRO
3
150
Introduction to Sansan Meishi Maker Development Engineer
sansan33
PRO
0
310
生成AI時代のPythonセキュリティとガバナンス
abenben
0
120
初めてのDatabricks Apps開発
taka_aki
1
260
MCP ✖️ Apps SDKを触ってみた
hisuzuya
0
320
Featured
See All Featured
[RailsConf 2023 Opening Keynote] The Magic of Rails
eileencodes
31
9.7k
Side Projects
sachag
455
43k
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
234
17k
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
mongodb
48
9.7k
Fireside Chat
paigeccino
40
3.7k
Automating Front-end Workflow
addyosmani
1371
200k
Raft: Consensus for Rubyists
vanstee
140
7.2k
Reflections from 52 weeks, 52 projects
jeffersonlam
353
21k
Code Reviewing Like a Champion
maltzj
526
40k
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
tammyeverts
10
610
Building a Scalable Design System with Sketch
lauravandoore
463
33k
Faster Mobile Websites
deanohume
310
31k
Transcript
The Final Crontab Selena Deckelmann Data Architect, Mozilla @selenamarie http://chesnok.com/
crontabber
None
None
socorro1 socorro3 WAL Socorro1 .dev Socorro1. stage base_backup copy Sunday
noon PT streaming rep Prod socorro2 backup4 base_backup & pg_dump backup reporting1 WAL socorro-db-zeus-rw socorro-db-zeus-ro very architecture very architecture such replicas such replicas wow wow
None
None
None
None
None
Tons more at: http://lqbs.fr/suchcomments/
None
http://github.com/mozilla/socorro
http://bit.ly/1fOgBSB
*/5 * * * * socorro crontabber.sh
image by @CoryLoftis
Motivating factors
#ThreeWordHorrorStories
No unit tests
No unit tests
Bespoke shell scripts
Postgres stored procedures
Email from cron
0 5000 10000 15000 20000 25000 Dec 5, 2010 May
5, 2011 Oct 5, 2011 Mar 5, 2012 Aug 5, 2012 Jan 5, 2013 Jun 5, 2013 Nov 5, 2013 Apr 5, 2014 Cron alert messages
None
Email from cron that you need to read.
None
Cron, what is it good for? • birthday reminders •
status updates for a website • doxygen output for manuals every 12 hours • email nags about bugs filed wrong • ETL • Postgres -> Cloudwatch • Batch processing • Backups of RO DB • Machine heartbeat • “sweet fuck all” • “auto” updates • logging laptop IP • check for abandoned twitter accounts
Running jobs on a predictable schedule
How Socorro uses cron • Time-dependent reports or maintenance •
“Simple” event detection and triggers • Status logging
Our use cases • Stored procedures for materialized views in
Postgres • Daily map-reduces (largely deprecated) • FTP Scraping into Postgres • Bulk email responses to crash submissions pulled from Elastic Search
Jobs that don’t lend themselves to queue management because of
time-dependencies, fragility or complexity.
crontabber https://github.com/mozilla/crontabber
On Github: Peter Bengtsson @peterbe & Lars Lohn @twobraids
pip install crontabber
Our crontabber jobs
None
None
None
None
configman https://github.com/mozilla/configman
Our config https://github.com/mozilla/socorro/blob/ master/config/crontabber.ini-dist
None
No more shell scripts
#!/bin/bash . /etc/socorro/socorrorc NAME=`basename $0 .sh` lock --ignore-existing $NAME ${PYTHON}
${APPDIR}/socorro/cron/crontabber.py \ --admin.conf=/etc/socorro/crontabber.ini \ >> /var/log/socorro/crontabber.log 2>&1 EXIT_CODE=$? unlock $NAME exit $EXIT_CODE
Retries on failure
Waits to run if a dependency fails
Nagios alerts
15:58 < nagios-phx1> | Sun 15:58:44 PDT [1085] socorroadm.stage.private.phx1.mozilla.com: Socorro
Admin - crontab is CRITICAL: CRITICAL - correlations-addon-matview (CorrelationsAddonCronApp) (http://m.mozilla.org/Socorro+Admin+-+crontab)
Allow configurable number of failures before CRITICAL
Unit test framework for all jobs
Documented dependencies
None
None
Config can get hairy
One-off runs aren’t simple
Parallel execution coming soon! or...
*/5 * * * * socorro crontabber \ --admin.conf=/etc/crontabber1.ini */5
* * * * socorro crontabber \ --admin.conf=/etc/crontabber2.ini */5 * * * * socorro crontabber \ --admin.conf=/etc/crontabber3.ini
crontabber as a module is running in our stage environment
Dependencies • Python 2.6 or higher • Postgres 9.2 or
higher •
https://github.com/mozilla/crontabber Ping us in #breakpad on irc.mozilla.org Tune in: Tuesday
June 10th at 7pm PDT at air.mozilla.com!
The Final Crontab Selena Deckelmann Data Architect, Mozilla @selenamarie http://chesnok.com/