4 from routes import Mapper
8 import sqlalchemy as sa
10 from invirt import database
11 from invirt.config import structs as config
13 class RemConfFS(routefs.RouteFS):
15 RemConfFS creates a filesytem for configuring remctl, like this:
23 The machine list and the acls are drawn from a database.
26 def __init__(self, *args, **kw):
27 """Initialize the filesystem and set it to allow_other access besides
28 the user who mounts the filesystem (i.e. root)
30 super(RemConfFS, self).__init__(*args, **kw)
31 self.fuse_args.add("allow_other", True)
33 openlog('invirt-remconffs ', LOG_PID, LOG_DAEMON)
35 syslog(LOG_DEBUG, 'Init complete.')
39 m.connect('', controller='getroot')
40 m.connect('acl', controller='getmachines')
41 m.connect('acl/:machine', controller='getacl')
42 m.connect('conf', controller='getconf')
45 def getroot(self, **kw):
46 return ['acl', 'conf']
48 def getacl(self, machine, **kw):
49 """Build the ACL file for a machine
51 s = sa.sql.select([database.machine_access_table.c.user], # Field to select from
52 sa.sql.and_( # where clause
53 database.machine_table.c.machine_id==database.machine_access_table.c.machine_id, # join field
54 database.machine_table.c.name == machine), # filter field
55 from_obj=[database.machine_access_table, database.machine_table]) # from tables
56 users = [self.userToPrinc(acl[0]) for acl in
57 database.session.execute(s)]
58 return "\n".join(users
59 + ['include /etc/remctl/acl/web',
62 def getconf(self, **kw):
63 """Build the master conf file, with all machines
65 return '\n'.join("control %s /usr/sbin/invirt-remote-proxy-control"
66 " /etc/remctl/remconffs/acl/%s"
67 % (machine_name, machine_name)
68 for machine_name in self.getmachines())+'\n'
70 def getmachines(self, **kw):
71 """Get the list of VMs in the database. Does not cache to prevent race conditions."""
72 return list(row[0] for row in database.session.execute(sa.sql.select([database.Machine.c.name])))
74 def userToPrinc(self, user):
75 """Convert Kerberos v4-style names to v5-style and append a default
76 realm if none is specified
79 (princ, realm) = user.split('@')
82 realm = config.authn[0].realm
84 return princ.replace('.', '/') + '@' + realm
86 if __name__ == '__main__':
88 routefs.main(RemConfFS)