Package starcluster :: Package commands :: Module addnode
[hide private]
[frames] | no frames]

Source Code for Module starcluster.commands.addnode

  1  #!/usr/bin/env python 
  2   
  3  from completers import ClusterCompleter 
  4   
  5   
6 -class CmdAddNode(ClusterCompleter):
7 """ 8 addnode [options] <cluster_tag> 9 10 Add a node to a running cluster 11 12 Examples: 13 14 $ starcluster addnode mycluster 15 16 This will launch a new node and add it to mycluster. The node's alias will 17 be autogenerated based on the existing node aliases in the cluster. 18 19 If you want to provide your own alias for the node use the -a option: 20 21 $ starcluster addnode -a mynode mycluster 22 23 This will add a new node called 'mynode' to mycluster. 24 25 You can also add multiple nodes using the -n option: 26 27 $ starcluster addnode -n 3 mycluster 28 29 The above example will add three new nodes to mycluster with autogenerated 30 aliases. If you'd rather provide your own aliases: 31 32 $ starcluster addnode -a mynode1,mynode2,mynode3 mycluster 33 34 This will add three new nodes to mycluster named mynode1, mynode2, and 35 mynode3. 36 37 If you've previously attempted to add a node and it failed due to a plugin 38 error or other bug or if you used the 'removenode' command with the '-k' 39 option and wish to re-add the node to the cluster without launching a new 40 instance you can use the '-x' option: 41 42 $ starcluster addnode -x -a mynode1 mycluster 43 44 NOTE: The -x option requires the -a option 45 46 This will add 'mynode1' to mycluster using the existing instance. If no 47 instance exists with the alias specified by the '-a' option an error is 48 reported. You can also do this for multiple nodes: 49 50 $ starcluster addnode -x -a mynode1,mynode2,mynode3 mycluster 51 """ 52 names = ['addnode', 'an'] 53 54 tag = None 55
56 - def addopts(self, parser):
57 parser.add_option("-a", "--alias", dest="alias", 58 action="append", type="string", default=[], 59 help=("alias to give to the new node " + \ 60 "(e.g. node007, mynode, etc)")) 61 parser.add_option("-n", "--num-nodes", dest="num_nodes", 62 action="store", type="int", default=1, 63 help=("number of new nodes to launch")) 64 parser.add_option("-x", "--no-create", dest="no_create", 65 action="store_true", default=False, 66 help="do not launch new EC2 instances when " + \ 67 "adding nodes (use existing instances instead)")
68
69 - def _get_duplicate(self, lst):
70 d = {} 71 for item in lst: 72 if item in d: 73 return item 74 else: 75 d[item] = 0
76
77 - def execute(self, args):
78 if len(args) != 1: 79 self.parser.error("please specify a cluster <cluster_tag>") 80 tag = self.tag = args[0] 81 aliases = [] 82 for alias in self.opts.alias: 83 aliases.extend(alias.split(',')) 84 if 'master' in aliases: 85 self.parser.error("'master' is a reserved alias") 86 num_nodes = self.opts.num_nodes 87 if num_nodes == 1 and aliases: 88 num_nodes = len(aliases) 89 if num_nodes > 1 and aliases and len(aliases) != num_nodes: 90 self.parser.error("you must specify the same number of aliases " 91 "(-a) as nodes (-n)") 92 dupe = self._get_duplicate(aliases) 93 if dupe: 94 self.parser.error("cannot have duplicate aliases (duplicate: %s)" % 95 dupe) 96 if not self.opts.alias and self.opts.no_create: 97 self.parser.error("you must specify one or more node aliases via " 98 "the -a option when using -x") 99 self.cm.add_nodes(tag, num_nodes, aliases=aliases, 100 no_create=self.opts.no_create)
101