1
2
3 from completers import ClusterCompleter
4
5
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
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
70 d = {}
71 for item in lst:
72 if item in d:
73 return item
74 else:
75 d[item] = 0
76
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