Puppet Function: ipa_topology_ring

Defined in:
lib/puppet/parser/functions/ipa_topology_ring.rb
Function type:
Ruby 3.x API

Overview

ipa_topology_ring() ⇒ Any

Return an ipa ring topology from a sorted list of hosts

Example:

$valid_peers = ipa_topology_ring($peers) notice(“valid peers is: $valid_peers”)

This function is used internally for building automatic topologies.

Returns:

  • (Any) 


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# File 'lib/puppet/parser/functions/ipa_topology_ring.rb', line 21

newfunction(:ipa_topology_ring, :type => :rvalue, :doc => <<-'ENDHEREDOC') do |args|
	Return an ipa ring topology from a sorted list of hosts

	Example:

		$valid_peers = ipa_topology_ring($peers)
		notice("valid peers is: ${valid_peers}")

	This function is used internally for building automatic topologies.

	ENDHEREDOC

	Puppet::Parser::Functions.function('warning')	# load function
	# signature: replica, bricks -> bricks
	unless args.length == 1
		raise Puppet::ParseError, "ipa_topology_ring(): wrong number of arguments (#{args.length}; must be 1)"
	end
	if not(args[0].is_a?(Array))
		raise Puppet::ParseError, "ipa_topology_ring(): expects the first argument to be an array, got #{args[0].inspect} which is of type #{args[0].class}"
	end

	peers = args[0]

	if peers.uniq.length != peers.length	# there are duplicates!
		raise Puppet::ParseError, "ipa_topology_ring(): duplicates were found in the first argument!"
	end

	# NOTE: need at least one
	if peers.length < 1
		function_warning(["ipa_topology_ring(): peer list is empty"])
		return {}
	end

	# if we only have one peer, and it's me, then topology is empty
	if peers.length == 1 and peers[0] == lookupvar('fqdn')
		return {}
	end

	result = {}

	i = 0
	while i < peers.length do

		x = peers[i]		# from
		if i < peers.length-1
			y = peers[i+1]	# to
		else
			y = peers[0]	# wrap around
		end

		# store value as a list, in the ring case of length 1
		result[x] = [y]

		i+=1	# i++
	end

	result	# return
end