src/emuvim/cli/compute.py

   1 """
   2 son-emu compute CLI
   3 (c) 2016 by Manuel Peuster <manuel.peuster@upb.de>
   4 """
   5
   6 import argparse
   7 import pprint
   8 from tabulate import tabulate
   9 import zerorpc
  10
  11
  12 pp = pprint.PrettyPrinter(indent=4)
  13
  14
  15 class ZeroRpcClient(object):
  16
  17     def __init__(self):
  18         self.c = zerorpc.Client()
  19         self.c.connect("tcp://127.0.0.1:4242")  # TODO hard coded for now. we'll change this later
  20         self.cmds = {}
  21
  22     def execute_command(self, args):
  23         if getattr(self, args["command"]) is not None:
  24             # call the local method with the same name as the command arg
  25             getattr(self, args["command"])(args)
  26         else:
  27             print "Command not implemented."
  28
  29     def start(self, args):
  30         nw_list = list()
  31         if args.get("network") is not None:
  32             nw_list = self._parse_network(args.get("network"))
  33
  34         r = self.c.compute_action_start(
  35             args.get("datacenter"),
  36             args.get("name"),
  37             args.get("image"),
  38             args.get("docker_command"),
  39             nw_list)
  40         pp.pprint(r)
  41
  42     def stop(self, args):
  43         r = self.c.compute_action_stop(
  44             args.get("datacenter"), args.get("name"))
  45         pp.pprint(r)
  46
  47     def list(self, args):
  48         r = self.c.compute_list(
  49             args.get("datacenter"))
  50         table = []
  51         for c in r:
  52             # for each container add a line to the output table
  53             if len(c) > 1:
  54                 name = c[0]
  55                 status = c[1]
  56                 eth0ip = None
  57                 eth0status = "down"
  58                 if len(status.get("network")) > 0:
  59                     eth0ip = status.get("network")[0][1]
  60                     eth0status = "up" if status.get(
  61                         "network")[0][3] else "down"
  62                 table.append([status.get("datacenter"),
  63                               name,
  64                               status.get("image"),
  65                               eth0ip,
  66                               eth0status,
  67                               status.get("state").get("Status")])
  68         headers = ["Datacenter",
  69                    "Container",
  70                    "Image",
  71                    "eth0 IP",
  72                    "eth0 status",
  73                    "Status"]
  74         print tabulate(table, headers=headers, tablefmt="grid")
  75
  76     def status(self, args):
  77         r = self.c.compute_status(
  78             args.get("datacenter"), args.get("name"))
  79         pp.pprint(r)
  80
  81     def _parse_network(self, network_str):
  82         '''
  83         parse the options for all network interfaces of the vnf
  84         :param network_str: (id=x,ip=x.x.x.x/x), ...
  85         :return: list of dicts [{"id":x,"ip":"x.x.x.x/x"}, ...]
  86         '''
  87         nw_list = list()
  88         networks = network_str[1:-1].split('),(')
  89         for nw in networks:
  90             nw_dict = dict(tuple(e.split('=')) for e in nw.split(','))
  91             nw_list.append(nw_dict)
  92
  93         return nw_list
  94
  95
  96
  97 parser = argparse.ArgumentParser(description='son-emu compute')
  98 parser.add_argument(
  99     "command",
 100     choices=['start', 'stop', 'list', 'status'],
 101     help="Action to be executed.")
 102 parser.add_argument(
 103     "--datacenter", "-d", dest="datacenter",
 104     help="Data center to in which the compute instance should be executed")
 105 parser.add_argument(
 106     "--name", "-n", dest="name",
 107     help="Name of compute instance e.g. 'vnf1'")
 108 parser.add_argument(
 109     "--image","-i", dest="image",
 110     help="Name of container image to be used e.g. 'ubuntu'")
 111 parser.add_argument(
 112     "--dcmd", "-c", dest="docker_command",
 113     help="Startup command of the container e.g. './start.sh'")
 114 parser.add_argument(
 115     "--net", dest="network",
 116     help="Network properties of compute instance e.g. \
 117           '10.0.0.123/8' or '10.0.0.123/8,11.0.0.123/24' for multiple interfaces.")
 118
 119
 120 def main(argv):
 121     args = vars(parser.parse_args(argv))
 122     c = ZeroRpcClient()
 123     c.execute_command(args)