Added custom docker fact

- Currently the implementation creates hash of the current docker networks - Also adds a docker.network.managed_interfaces hash to correspond a docker network with real interface
garethr · Aug 28, 2019 · 3cb2f9b · 3cb2f9b
1 parent 4ca7fe8
commit 3cb2f9b
Showing 1 changed file with 30 additions and 0 deletions.
diff --git a/lib/facter/docker.rb b/lib/facter/docker.rb
@@ -0,0 +1,30 @@
+require 'facter'
+require 'json'
+
+def interfaces
+  Facter.value(:interfaces).split(',')
+end
+
+Facter.add(:docker) do
+  setcode do
+    if Facter::Util::Resolution.which('docker')
+      docker = Hash.new
+      docker['network'] = Hash.new
+      docker['network']['managed_interfaces'] = Hash.new
+      network_list = Facter::Util::Resolution.exec('docker network ls | tail -n +2')
+      docker_network_names = Array.new
+      network_list.each_line {|line| docker_network_names.push line.split[1] }
+      docker_network_ids = Array.new
+      network_list.each_line {|line| docker_network_ids.push line.split[0] }
+      docker_network_names.each do |network|
+        inspect = JSON.parse(Facter::Util::Resolution.exec("docker network inspect #{network}"))
+        docker['network'][network] = inspect[0]
+        network_id = docker['network'][network]['Id'][0..11]
+        interfaces.each do |iface|
+          docker['network']['managed_interfaces'][iface] = network if iface =~ /#{network_id}/
+        end
+      end
+      docker
+    end
+  end
+end