add-node.py

    def create_inventory_file(self):

        total_nodes=int(self.master_nodes)+int(self.app_nodes)+int(self.infra_nodes)+int(self.support_nodes)+int(self.args.node_number)
        nodes_remove=int(self.master_nodes)+int(self.app_nodes)+int(self.infra_nodes)+int(self.support_nodes)

        ip4addr = []
        for i in range(total_nodes):
            p = iptools.ipv4.ip2long(self.vm_ipaddr_start) + i
            ip4addr.append(iptools.ipv4.long2ip(p))

        unusedip4addr = []
        for i in range(0, int(self.args.node_number)):
            unusedip4addr.insert(0, ip4addr.pop())

        d = {}
        d['host_inventory'] = {}
        for i in range(0, int(self.args.node_number)):
            #determine node_number increment on the number of nodes 
            if self.args.node_type == 'app':
                node_ip = int(self.app_nodes) + i
                guest_name = self.args.node_type + '-' + str(node_ip)
            if self.args.node_type == 'infra':
                node_ip = int(self.infra_nodes) + i
                guest_name = self.args.node_type + '-' + str(node_ip)
            if self.ocp_hostname_prefix:
                guest_name = self.ocp_hostname_prefix + guest_name
            d['host_inventory'][guest_name] = {}
            d['host_inventory'][guest_name]['guestname'] = guest_name 
            d['host_inventory'][guest_name]['ip4addr'] = unusedip4addr[0]
            d['host_inventory'][guest_name]['tag'] = self.args.node_type
            del unusedip4addr[0]
        with open(self.inventory_file, 'w') as outfile:
            json.dump(d, outfile)