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author | Dan Prince <dprince@redhat.com> | 2015-05-29 10:27:01 -0400 |
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committer | Dan Prince <dprince@redhat.com> | 2015-06-03 10:51:29 -0400 |
commit | 10ac6980f93ca33e279359c29c3cc19151b79f32 (patch) | |
tree | a909f97bf3c675f1d720ff5a0ad0feaa305d76e6 /lib/puppet/parser | |
parent | 8b945b5e0ff93af2ec1c6540d6177739ab846c99 (diff) |
Add interface_for_ip function
This patch adds a custom Puppet function called interface_for_ip
This function will be used within the TripleO puppet implementation
to help obtain the correct interface for a given IP address.
Change-Id: I0979f69a49052fda888277fa64ebeadc038bc778
Diffstat (limited to 'lib/puppet/parser')
-rw-r--r-- | lib/puppet/parser/functions/interface_for_ip.rb | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/interface_for_ip.rb b/lib/puppet/parser/functions/interface_for_ip.rb new file mode 100644 index 0000000..1c67120 --- /dev/null +++ b/lib/puppet/parser/functions/interface_for_ip.rb @@ -0,0 +1,33 @@ +require 'ipaddr' + +# Custom function to lookup the interface which matches the subnet +# of the provided IP address. +# The function iterates over all the interfaces and chooses the +# first locally assigned interface which matches the IP. +module Puppet::Parser::Functions + newfunction(:interface_for_ip, :type => :rvalue, :doc => "Find the bind IP address for the provided subnet.") do |arg| + if arg[0].class == String + begin + ip_to_find = arg[0] + Dir.foreach('/sys/class/net/') do |interface| + next if interface == '.' or interface == '..' + iface_no_dash = interface.gsub('-', '_') + interface_ip = lookupvar("ipaddress_#{iface_no_dash}") + netmask = lookupvar("netmask_#{iface_no_dash}") + if not interface_ip.nil? then + ip1=IPAddr.new(interface_ip) + ip2=IPAddr.new(ip_to_find) + if ip1.mask(netmask) == ip2.mask(netmask) then + return interface + end + end + end + rescue JSON::ParserError + raise Puppet::ParseError, "Syntax error: #{arg[0]} is invalid" + end + else + raise Puppet::ParseError, "Syntax error: #{arg[0]} is not a String" + end + return '' + end +end |