1 module Puppet::Parser::Functions
2 newfunction(:entropy_provider, :type => :rvalue) do |args|
9 localinfo = lookupvar('site::localinfo')
10 allnodeinfo = lookupvar('site::allnodeinfo')
12 raise Puppet::ParseError, "entropy_provider: Cannot learn fqdn" unless fqdn
13 raise Puppet::ParseError, "entropy_provider: Cannot learn nodeinfo" unless nodeinfo
14 raise Puppet::ParseError, "entropy_provider: Cannot learn localinfo" unless localinfo
15 raise Puppet::ParseError, "entropy_provider: Cannot learn allnodeinfo" unless allnodeinfo
17 # find where all the entropy keys are
20 localinfo.keys.sort.each do |node|
21 next unless localinfo[node]['entropy_key']
23 addresses = allnodeinfo[node]['ipHostNumber']
24 thishoster = function_whohosts([addresses])
25 name = thishoster['name']
29 hoster[name] = [] unless hoster[name]
32 raise Puppet::ParseError, "entropy_provider: no entropy providers" unless provider.size > 0
34 # figure out which entropy provider to use
35 consumer_hoster = nodeinfo['hoster']
36 consumer_hoster_name = nodeinfo['hoster']['name']
38 if consumer_hoster['entropy_provider_hoster'] and hoster[consumer_hoster['entropy_provider_hoster']]
39 # if we have a preferred entropy provider hoster for hosts at this one.
40 entropy_provider_hoster = consumer_hoster['entropy_provider_hoster']
41 elsif hoster[consumer_hoster_name]
42 # if there are any at the same hoster, use one of them
43 entropy_provider_hoster = consumer_hoster_name
45 entropy_provider_hoster = nil
48 hash = Digest::SHA1.digest(fqdn)
49 hashval = hash[0].ord + hash[1].ord*256
51 if provider.include?(fqdn) # if the host has an ekeyd
53 elsif entropy_provider_hoster
54 # if there are more than one ekeys at this hoster pick an arbitrary
55 # one, but the same every time
56 index = hashval % hoster[entropy_provider_hoster].length
57 ans = hoster[entropy_provider_hoster][index]
58 else # pick an arbitrary provider from all providers
59 index = hashval % provider.size
65 raise Puppet::ParseError, "Error in entropy_provider: #{e.message}\n#{e.backtrace}"
71 # vim:set shiftwidth=2: