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
8k
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
550
Postgres: an intro for new developers
selenamarie
0
130
Alembic and SQLAlchemy: sane schema management
selenamarie
0
200
code4lib - What beginners teach us
selenamarie
0
1.3k
What beginners teach us - New Relic FutureTalk
selenamarie
0
180
Cost of 100% processing and crashstorage options for Socorro
selenamarie
0
110
Socorro, crash-stats.mozilla.com and Postgres
selenamarie
0
290
What beginners teach us - Passion Projects
selenamarie
6
2.1k
Sane Schema Management with Alembic
selenamarie
2
1.3k
Other Decks in Technology
See All in Technology
OCI 運用監視サービス 概要
oracle4engineer
PRO
0
4.8k
OTelCol_TailSampling_and_SpanMetrics
gumamon
1
200
FlutterアプリにおけるSLI/SLOを用いたユーザー体験の可視化と計測基盤構築
ostk0069
0
100
BLADE: An Attempt to Automate Penetration Testing Using Autonomous AI Agents
bbrbbq
0
320
AGIについてChatGPTに聞いてみた
blueb
0
130
TanStack Routerに移行するのかい しないのかい、どっちなんだい! / Are you going to migrate to TanStack Router or not? Which one is it?
kaminashi
0
600
【令和最新版】AWS Direct Connectと愉快なGWたちのおさらい
minorun365
PRO
5
760
Amazon CloudWatch Network Monitor のススメ
yuki_ink
1
210
Lexical Analysis
shigashiyama
1
150
マルチモーダル / AI Agent / LLMOps 3つの技術トレンドで理解するLLMの今後の展望
hirosatogamo
37
12k
エンジニア人生の拡張性を高める 「探索型キャリア設計」の提案
tenshoku_draft
1
130
Terraform Stacks入門 #HashiTalks
msato
0
360
Featured
See All Featured
The Cost Of JavaScript in 2023
addyosmani
45
6.8k
What's new in Ruby 2.0
geeforr
343
31k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
246
1.3M
The World Runs on Bad Software
bkeepers
PRO
65
11k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
8
900
GitHub's CSS Performance
jonrohan
1030
460k
Building Better People: How to give real-time feedback that sticks.
wjessup
364
19k
Happy Clients
brianwarren
98
6.7k
Done Done
chrislema
181
16k
How STYLIGHT went responsive
nonsquared
95
5.2k
Large-scale JavaScript Application Architecture
addyosmani
510
110k
Building Applications with DynamoDB
mza
90
6.1k
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/