Last active
August 29, 2015 14:10
-
-
Save wuputah/e8aa5adf7fde07e162e4 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/usr/bin/env ruby | |
# 1. Add your environment variable keys below to check them | |
# for connectivity. | |
CHECK = [ | |
'DATABASE_URL', | |
'MEMCACHIER_SERVERS', | |
'REDISCLOUD_URL', | |
] | |
# 2. Save this file to bin/check-connection, then: | |
# chmod +x bin/check-connection | |
# | |
# 3. To test without deploying, run: | |
# env -i $(heroku config -s -a your-app) bin/check-connection | |
# | |
# 4. Lastly, add it to your Procfile: | |
# web: bin/check-connection && bin/start | |
# | |
#---------------------------------------------- | |
#---------------------------------------------- | |
require 'uri' | |
require 'socket' | |
require 'timeout' | |
def check(host) | |
if host.include?(',') | |
return host.split(',').map { |h| check(h) }.inject { |a, b| a && b } | |
end | |
uri = URI(host) | |
Timeout.timeout(1) do | |
TCPSocket.new(uri.host, uri.port).close | |
end | |
true | |
# ECONNREFUSED, DNS failure, etc | |
rescue SocketError | |
false | |
# connection timeout | |
rescue Timeout::Error | |
false | |
# what was provided could not be parsed as uri | |
rescue URI::InvalidURIError | |
true | |
end | |
should_exit = false | |
CHECK.each do |var| | |
result = check(ENV[var]) | |
unless result | |
$stderr.puts "!! #{var} failed connection check" | |
should_exit = true | |
end | |
end | |
exit 1 if should_exit |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment