Automatically kill a master to show how sentinel works.

Author: djanowski

examples/sentinel/sentinel.conf

@@ -1,2 +1,9 @@
 sentinel monitor master1 127.0.0.1 6380 2
+sentinel down-after-milliseconds master1 5000
+sentinel failover-timeout master1 15000
+sentinel parallel-syncs master1 1
+
 sentinel monitor master2 127.0.0.1 6381 2
+sentinel down-after-milliseconds master2 5000
+sentinel failover-timeout master2 15000
+sentinel parallel-syncs master2 1

examples/sentinel/start

@@ -1,12 +1,21 @@
 #! /usr/bin/env ruby
 
+# This is a helper script used together with examples/sentinel.rb
+# It runs two Redis masters, two slaves for each of them, and two sentinels.
+# After 30 seconds, the first master dies.
+#
+# You don't need to run this script yourself. Rather, use examples/sentinel.rb.
+
 require "fileutils"
 
 $pids = []
 
 at_exit do
   $pids.each do |pid|
-    Process.kill(:INT, pid)
+    begin
+      Process.kill(:INT, pid)
+    rescue Errno::ESRCH
+    end
   end
 
   Process.waitall
@@ -33,4 +42,8 @@ FileUtils.cp(File.join(base, "sentinel.conf"), "tmp/sentinel2.conf")
 $pids << spawn("redis-server tmp/sentinel1.conf --sentinel --port 26379")
 $pids << spawn("redis-server tmp/sentinel2.conf --sentinel --port 26380")
 
+sleep 30
+
+Process.kill(:KILL, $pids[0])
+
 Process.waitall