From 3b18676f59aa0bdb7308f2754acb412711540eba Mon Sep 17 00:00:00 2001
From: Ian Gulliver <ian@isinglasstheater.org>
Date: Tue, 27 May 2014 16:58:20 -0700
Subject: [PATCH] Add a new class of chaos monkey errors after the inner code
 has run. Lower the overall error rate to reduce traffic.

---
 config.py    |  2 +-
 lib/utils.py | 10 +++++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/config.py b/config.py
index 92e43f6..a4ed3a7 100644
--- a/config.py
+++ b/config.py
@@ -6,4 +6,4 @@ NAMESPACE = 'cosmopolite'
 CHANNEL_DURATION_SECONDS = 60 * 60 * 2  # 2 hours
 
 # Probabilities
-CHAOS_PROBABILITY = 0.50
+CHAOS_PROBABILITY = 0.05
diff --git a/lib/utils.py b/lib/utils.py
index 58b00f6..64ed36d 100644
--- a/lib/utils.py
+++ b/lib/utils.py
@@ -52,7 +52,15 @@ def chaos_monkey(handler):
       self.response.headers['Retry-After'] = '0'
       self.error(503)
       return
-    return handler(self)
+
+    ret = handler(self)
+
+    if random.random() < config.CHAOS_PROBABILITY:
+      self.response.headers['Retry-After'] = '0'
+      self.error(503)
+      return
+
+    return ret
 
   return IntroduceFailures