Project Summary
Simian Army / Chaos Monkey is a service which identifies groups of systems and randomly terminates one of the systems in a group. The service operates at a controlled time (does not run on weekends and holidays) and interval (only operates during business hours). In most cases we have designed our applications to continue working when a peer goes offline, but in those special cases we want to make sure there are people around to resolve and learn from any problems. With this in mind Chaos Monkey only runs in business hours with the intent that engineers will be alert and able to respond.
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In a Nutshell, SimianArmy...
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took an estimated 5 years of effort (COCOMO model)
starting with its first commit in March, 2012
ending with its most recent commit almost 8 years ago
Quick Reference
Apache License 2.0
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Sub-License
Private Use
Use Patent Claims
Forbidden
Hold Liable
Use Trademarks
Required
Include Copyright
State Changes
Include License
Include Notice
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
Did You Know...
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use of OSS increased in 65% of companies in 2016
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you can embed statistics from Open Hub on your site
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nearly 1 in 3 companies have no process for identifying, tracking, or remediating known open source vulnerabilities
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data presented on the Open Hub is available through our API
30 Day SummaryJun 24 2026 — Jul 24 2026
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12 Month SummaryJul 24 2025 — Jul 24 2026
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