install: updates to support building deb/rpm packages that contain python wheels and install core from a single file, updates to core to install scripts by way of python directly

package/examples/python/distributed_lxd.py

@@ -0,0 +1,69 @@
+"""
+Example for scripting a standalone distributed LXD session that does not interact
+with the GUI.
+"""
+
+import argparse
+import logging
+
+from core.emulator.coreemu import CoreEmu
+from core.emulator.data import IpPrefixes
+from core.emulator.enumerations import EventTypes
+from core.nodes.lxd import LxcNode
+
+
+def parse(name):
+    parser = argparse.ArgumentParser(description=f"Run {name} example")
+    parser.add_argument(
+        "-a",
+        "--address",
+        help="local address that distributed servers will use for gre tunneling",
+    )
+    parser.add_argument(
+        "-s", "--server", help="distributed server to use for creating nodes"
+    )
+    options = parser.parse_args()
+    return options
+
+
+def main(args):
+    # ip generator for example
+    prefixes = IpPrefixes(ip4_prefix="10.83.0.0/16")
+
+    # create emulator instance for creating sessions and utility methods
+    coreemu = CoreEmu({"distributed_address": args.address})
+    session = coreemu.create_session()
+
+    # initialize distributed
+    server_name = "core2"
+    session.distributed.add_server(server_name, args.server)
+
+    # must be in configuration state for nodes to start, when using "node_add" below
+    session.set_state(EventTypes.CONFIGURATION_STATE)
+
+    # create local node, switch, and remote nodes
+    options = LxcNode.create_options()
+    options.image = "ubuntu:18.04"
+    node1 = session.add_node(LxcNode, options=options)
+    options.server = server_name
+    node2 = session.add_node(LxcNode, options=options)
+
+    # create node interfaces and link
+    interface1_data = prefixes.create_iface(node1)
+    interface2_data = prefixes.create_iface(node2)
+    session.add_link(node1.id, node2.id, interface1_data, interface2_data)
+
+    # instantiate session
+    session.instantiate()
+
+    # pause script for verification
+    input("press enter for shutdown")
+
+    # shutdown session
+    coreemu.shutdown()
+
+
+if __name__ == "__main__":
+    logging.basicConfig(level=logging.INFO)
+    args = parse(__file__)
+    main(args)