commands/nodegroups.py

   1 #!/usr/bin/python
   2
   3 # This script is used to manipulate the operational state of nodes in
   4 # different node groups.  These are basically set operations on nodes via the
   5 # PLC api.
   6 #
   7 # Take the ng name as an argument....
   8 # optionally,
   9 #  * restart them all.
  10 #  * Set some or all in the set to rins.
  11 #  * get a list of nodes in the Alpha nodegroup.
  12 #
  13 # Given a nodelist, it could tag each one with a nodegroup name.
  14 #  *
  15
  16 from monitor import database
  17 from monitor.database.info.model import FindbadNodeRecord
  18 from monitor import util
  19 from monitor.wrapper import plc
  20 from monitor import parser as parsermodule
  21
  22 api = plc.getAuthAPI()
  23
  24 from monitor.common import *
  25 from sets import Set
  26
  27 def main():
  28
  29         parser = parsermodule.getParser(['nodesets'])
  30         parser.set_defaults( list=True,
  31                                                 add=False,
  32                         nocolor=False,
  33                                                 notng=False,
  34                                                 delete=False,)
  35
  36         parser.add_option("", "--not", dest="notng", action="store_true",
  37                                                 help="All nodes NOT in nodegroup.")
  38         parser.add_option("", "--nocolor", dest="nocolor", action="store_true",
  39                                                 help="Enable color")
  40         parser.add_option("", "--list", dest="list", action="store_true",
  41                                                 help="List all nodes in the given nodegroup")
  42         parser.add_option("", "--add", dest="add", action="store_true",
  43                                                 help="Add nodes to the given nodegroup")
  44         parser.add_option("", "--delete", dest="delete", action="store_true",
  45                                                 help="Delete nodes from the given nodegroup")
  46
  47         parser = parsermodule.getParser(['defaults'], parser)
  48         config = parsermodule.parse_args(parser)
  49
  50         # COLLECT nodegroups, nodes and node lists
  51         if config.node or config.nodelist:
  52                 if config.node:
  53                         hostlist = [ config.node ]
  54                 else:
  55                         hostlist = util.file.getListFromFile(config.nodelist)
  56
  57                 # NOTE: preserve order given in file.  Otherwise, return values are not in order
  58                 # given to GetNodes
  59                 nodelist = []
  60                 for h in hostlist:
  61                         nodelist.append( plccache.GetNodeByName(h) )
  62
  63                 group_str = "Given"
  64
  65         elif config.site:
  66                 site = plccache.GetSitesByName([config.site])
  67                 if len (site) > 0:
  68                         site = site[0]
  69                         nodelist = plccache.GetNodesByIds(site['node_ids'])
  70                 else:
  71                         nodelist = []
  72
  73                 group_str = config.site
  74
  75         elif config.nodeselect:
  76                 hostlist = query.node_select(config.nodeselect)
  77                 nodelist = [ plccache.GetNodeByName(h) for h in hostlist ]
  78
  79                 group_str = "selection"
  80
  81         else:
  82                 ng = api.GetNodeGroups({'name' : config.nodegroup})
  83                 nodelist = plccache.GetNodesByIds(ng[0]['node_ids'])
  84
  85                 group_str = config.nodegroup
  86
  87         if config.notng:
  88                 # Get nodegroup nodes
  89                 ng_nodes = nodelist
  90
  91                 # Get all nodes
  92                 all_nodes = plccache.l_nodes
  93
  94                 # remove ngnodes from all node list
  95                 ng_list = [ x['hostname'] for x in ng_nodes ]
  96                 all_list = [ x['hostname'] for x in all_nodes ]
  97                 not_ng_nodes = Set(all_list) - Set(ng_list)
  98
  99                 # keep each node that *is* in the not_ng_nodes set
 100                 nodelist = filter(lambda x : x['hostname'] in not_ng_nodes, all_nodes)
 101
 102         hostnames = [ n['hostname'] for n in nodelist ]
 103
 104         # commands:
 105
 106         if config.add and config.nodegroup:
 107                 for node in hostnames:
 108                         print "Adding %s to %s nodegroup" % (node, config.nodegroup)
 109                         api.AddNodeToNodeGroup(node, config.nodegroup)
 110
 111         elif config.delete:
 112                 for node in hostnames:
 113                         print "Deleting %s from %s nodegroup" % (node, config.nodegroup)
 114                         api.DeleteNodeFromNodeGroup(node, config.nodegroup)
 115
 116         elif config.list:
 117                 print " ---- Nodes in the %s Node Group ----" % group_str
 118                 print "   Hostname                                   plc  obs     pcu     key         kernel                        last_contact, last change, comon uptime"
 119                 i = 1
 120                 for node in nodelist:
 121                         print "%-2d" % i,
 122                         fbrec = FindbadNodeRecord.get_latest_by(hostname=node['hostname'])
 123                         fbdata = fbrec.to_dict()
 124                         print nodegroup_display(node, fbdata, config)
 125                         i += 1
 126
 127         else:
 128                 print "no other options supported."
 129
 130 if __name__ == "__main__":
 131         try:
 132                 main()
 133         except IOError:
 134                 pass