Agrega el modulo servers.py para manejo de servidores con fabric

Author: denn1s

Diff for: src/main/python/configs/configs/defaults/servers.yaml

@@ -0,0 +1,26 @@
+apps1:
+    addr: apps1.im
+    role: appserver
+    os: linux
+    distro: redhat
+apps2:
+    addr: apps2.im
+    role: appserver
+    os: linux
+    distro: debian
+db1:
+    addr: db1.im
+    role: dbserver
+    os: linux
+    distro: redhat
+repo1:
+    addr: repo1.im
+    role: reposerver
+    os: linux
+    distro: debian
+web1:
+    addr: web1.im
+    role: webserver
+    os: linux
+    distro: redhat
+        

Diff for: src/main/python/im/core/servers.py

@@ -0,0 +1,81 @@
+import os
+from im.core.config import conf
+from fabric.decorators import _list_annotating_decorator
+
+from fabric.state import env
+
+def hosts(*host_list):
+    """
+    Decorator defining which host or hosts to execute the wrapped function on.
+
+	@hosts('user1@host1', 'host2', 'user2@host3')
+	def my_func():
+		pass
+
+	Servers must be specified using the key in the configuration file and will
+	be returned to fabric using the addr field.
+    """
+    return _list_annotating_decorator('hosts', parse_servers(host_list))
+
+def roles(*role_list):
+    """
+    Decorator defining a list of role names, used to look up host lists.
+
+	it updates roledefs first and then returns the decorator 
+        env.roledefs.update({
+            'webserver': ['www1', 'www2'],
+            'dbserver': ['db1']
+        })
+
+        @roles('webserver', 'user@dbserver')
+        def my_func():
+            pass
+
+    """
+    host_list = []
+    for role in role_list:
+		host_list.append("role="+role)
+    parse_servers(host_list)
+	
+    return _list_annotating_decorator('roles', *role_list)
+
+
+def parse_servers(host_list):
+	servers = []
+	for query in host_list:
+		user=conf("servers.user", None)
+		port=conf("servers.port", None)
+		if "@" in query:
+			user, query = query.split("@",1)
+		if ":" in query:
+			query, port = query.split(":",1)
+		
+		if query == "all":
+			for s, server in conf("servers").iteritems():
+				servers.append(server_append(server['addr'], user, port))
+		elif query == "none":
+			pass
+		elif query == "local":
+			servers.append("local") # TODO: this doesn't work
+		elif "=" in query:
+			key, val = query.split("=",1)
+			for s, server in conf("servers").iteritems():
+				if server.get(key) == val:
+					servers.append(server_append(server['addr'], user, port))
+					if not env.roledefs.get(val):
+						env.roledefs[val] = []
+					env.roledefs[val].append(server['addr'])
+		else:
+			server = conf("servers").get(query)
+			if server:
+				servers.append(server_append(server['addr'], user, port))
+	
+	return servers
+
+def server_append(server, user, port):
+	server_string = server
+	if user:
+		server_string = user + "@" + server_string
+	if port:
+		server_string = server_string + ":" + port
+	return server_string