X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=xenserver%2Fusr_share_openvswitch_scripts_ovs-xapi-sync;h=7c78251e2443f8cece635f0a0ffcd050f2eef6cc;hb=bf42f674e77a4cb01863b3f975d3258b3c89dd58;hp=85795e0e6004f7b8241ba4692653119bb71b848b;hpb=2c11e6d91216a1f40e9a499ee37868c81fc34f35;p=sliver-openvswitch.git diff --git a/xenserver/usr_share_openvswitch_scripts_ovs-xapi-sync b/xenserver/usr_share_openvswitch_scripts_ovs-xapi-sync index 85795e0e6..7c78251e2 100755 --- a/xenserver/usr_share_openvswitch_scripts_ovs-xapi-sync +++ b/xenserver/usr_share_openvswitch_scripts_ovs-xapi-sync @@ -1,5 +1,5 @@ #!/usr/bin/python -# Copyright (c) 2009, 2010, 2011 Nicira Networks +# Copyright (c) 2009, 2010, 2011, 2012 Nicira Networks # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. @@ -24,8 +24,6 @@ import argparse import os -import signal -import subprocess import sys import time @@ -34,15 +32,26 @@ import XenAPI import ovs.dirs from ovs.db import error from ovs.db import types -import ovs.util import ovs.daemon import ovs.db.idl +import ovs.unixctl -root_prefix = '' # Prefix for absolute file names, for testing. vlog = ovs.vlog.Vlog("ovs-xapi-sync") -vsctl = "/usr/bin/ovs-vsctl" session = None -force_run = False +flush_cache = False +exiting = False + + +def unixctl_exit(conn, unused_argv, unused_aux): + global exiting + exiting = True + conn.reply(None) + + +def unixctl_flush_cache(conn, unused_argv, unused_aux): + global flush_cache + flush_cache = True + conn.reply(None) # Set up a session to interact with XAPI. @@ -116,11 +125,28 @@ def get_iface_id(if_name, xs_vif_uuid): return xs_vif_uuid -def call_vsctl(args): - cmd = [vsctl, "--timeout=30", "-vANY:console:off"] + args - exitcode = subprocess.call(cmd) - if exitcode != 0: - vlog.warn("Couldn't call ovs-vsctl") +# By default, the "vm-id" external id in the Interface table is the +# same as "xs-vm-uuid". This may be overridden by defining a +# "nicira-vm-id" key in the "other_config" field of the VM +# record of XAPI. +def get_vm_id(if_name, xs_vm_uuid): + if not if_name.startswith("vif") and not if_name.startswith("tap"): + # Treat whatever was passed into 'xs_vm_uuid' as a default + # value for non-VIFs. + return xs_vm_uuid + + if not init_session(): + vlog.warn("Failed to get vm id for interface id %s because" + " XAPI session could not be initialized" % if_name) + return xs_vm_uuid + + try: + vm = session.xenapi.VM.get_by_uuid(xs_vm_uuid) + rec = session.xenapi.VM.get_record(vm) + return rec['other_config'].get('nicira-vm-id', xs_vm_uuid) + except XenAPI.Failure: + vlog.warn("Could not find XAPI entry for VIF %s" % if_name) + return xs_vm_uuid def set_or_delete(d, key, value): @@ -179,53 +205,13 @@ def update_in_band_mgmt(row): row.other_config = other_config -def update_bridge_id(row): - id_ = get_bridge_id(row.name, row.external_ids.get("xs-network-uuids")) - if not id_: - return - - set_external_id(row, "bridge-id", id_.split(";")[0]) - - -def keep_table_columns(schema, table_name, columns): - table = schema.tables.get(table_name) - if not table: - raise error.Error("schema has no %s table" % table_name) - - new_columns = {} - for column_name in columns: - column = table.columns.get(column_name) - if not column: - raise error.Error("%s table schema lacks %s column" - % (table_name, column_name)) - new_columns[column_name] = column - table.columns = new_columns - return table - - -def prune_schema(schema): - new_tables = {} - new_tables["Bridge"] = keep_table_columns( - schema, "Bridge", ("name", "external_ids", "other_config", - "fail_mode")) - new_tables["Interface"] = keep_table_columns( - schema, "Interface", ("name", "external_ids")) - schema.tables = new_tables - - -def handler(signum, _): - global force_run - if (signum == signal.SIGHUP): - force_run = True - - def main(): - global force_run + global flush_cache parser = argparse.ArgumentParser() parser.add_argument("database", metavar="DATABASE", help="A socket on which ovsdb-server is listening.") - parser.add_argument("--root-prefix", metavar="DIR", + parser.add_argument("--root-prefix", metavar="DIR", default='', help="Use DIR as alternate root directory" " (for testing).") @@ -235,62 +221,81 @@ def main(): ovs.vlog.handle_args(args) ovs.daemon.handle_args(args) - global root_prefix - if args.root_prefix: - root_prefix = args.root_prefix - remote = args.database - schema_file = "%s/vswitch.ovsschema" % ovs.dirs.PKGDATADIR - schema = ovs.db.schema.DbSchema.from_json(ovs.json.from_file(schema_file)) - prune_schema(schema) - idl = ovs.db.idl.Idl(remote, schema) + schema_helper = ovs.db.idl.SchemaHelper() + schema_helper.register_columns("Bridge", ["name", "external_ids", + "other_config", "fail_mode"]) + schema_helper.register_columns("Interface", ["name", "external_ids"]) + idl = ovs.db.idl.Idl(remote, schema_helper) ovs.daemon.daemonize() + ovs.unixctl.command_register("exit", "", 0, 0, unixctl_exit, None) + ovs.unixctl.command_register("flush-cache", "", 0, 0, unixctl_flush_cache, + None) + error, unixctl_server = ovs.unixctl.UnixctlServer.create(None) + if error: + ovs.util.ovs_fatal(error, "could not create unixctl server", vlog) + # This daemon is usually started before XAPI, but to complete our # tasks, we need it. Wait here until it's up. - cookie_file = root_prefix + "/var/run/xapi_init_complete.cookie" + cookie_file = args.root_prefix + "/var/run/xapi_init_complete.cookie" while not os.path.exists(cookie_file): time.sleep(1) - signal.signal(signal.SIGHUP, handler) - - bridges = {} # Map from bridge name to xs_network_uuids - interfaces = {} # Map from interface name to xs-vif-uuid + bridges = {} # Map from bridge name to nicira-bridge-id + iface_ids = {} # Map from xs-vif-uuid to iface-id + vm_ids = {} # Map from xs-vm-uuid to vm-id + seqno = idl.change_seqno # Sequence number when we last processed the db while True: - if not force_run and not idl.run(): + unixctl_server.run() + if exiting: + break; + + idl.run() + if not flush_cache and seqno == idl.change_seqno: poller = ovs.poller.Poller() + unixctl_server.wait(poller) idl.wait(poller) poller.block() continue - if force_run: - vlog.info("Forced to re-run as the result of a SIGHUP") + if flush_cache: + vlog.info("Flushing cache as the result of unixctl.") bridges = {} - interfaces = {} - force_run = False + iface_ids = {} + vm_ids = {} + flush_cache = False + seqno = idl.change_seqno txn = ovs.db.idl.Transaction(idl) new_bridges = {} for row in idl.tables["Bridge"].rows.itervalues(): - old_xnu = bridges.get(row.name) - new_xnu = row.external_ids.get("xs-network-uuids", "") - if old_xnu is None: + if row.name in bridges: + nbd = bridges[row.name] + else: # New bridge. update_fail_mode(row) update_in_band_mgmt(row) - if new_xnu != old_xnu: - # New bridge or bridge's xs-network-uuids has changed. - update_bridge_id(row) - new_bridges[row.name] = new_xnu + nbd = get_bridge_id(row.name) + + bridge_id = nbd + if bridge_id is None: + bridge_id = row.external_ids.get("xs-network-uuids") + + if bridge_id is not None: + set_external_id(row, "bridge-id", bridge_id.split(";")[0]) + + new_bridges[row.name] = nbd bridges = new_bridges iface_by_name = {} for row in idl.tables["Interface"].rows.itervalues(): iface_by_name[row.name] = row - new_interfaces = {} + new_iface_ids = {} + new_vm_ids = {} for row in idl.tables["Interface"].rows.itervalues(): # Match up paired vif and tap devices. if row.name.startswith("vif"): @@ -311,17 +316,31 @@ def main(): for k in keys: set_external_id(row, k, vif.external_ids.get(k)) - # If it's a new interface or its xs-vif-uuid has changed, then - # obtain the iface-id from XAPI. + # Map from xs-vif-uuid to iface-id. # # (A tap's xs-vif-uuid comes from its vif. That falls out # naturally from the copy loop above.) - new_xvu = row.external_ids.get("xs-vif-uuid", "") - old_xvu = interfaces.get(row.name) - if old_xvu != new_xvu: - iface_id = get_iface_id(row.name, new_xvu) - if iface_id and row.external_ids.get("iface-id") != iface_id: - set_external_id(row, "iface-id", iface_id) + xvu = row.external_ids.get("xs-vif-uuid") + if xvu: + iface_id = (new_iface_ids.get(xvu) + or iface_ids.get(xvu) + or get_iface_id(row.name, xvu)) + new_iface_ids[xvu] = iface_id + else: + # No xs-vif-uuid therefore no iface-id. + iface_id = None + set_external_id(row, "iface-id", iface_id) + + # Map from xs-vm-uuid to vm-id. + xvmu = row.external_ids.get("xs-vm-uuid") + if xvmu: + vm_id = (new_vm_ids.get(xvmu) + or vm_ids.get(xvmu) + or get_vm_id(row.name, xvmu)) + new_vm_ids[xvmu] = vm_id + else: + vm_id = None + set_external_id(row, "vm-id", vm_id) # When there's a vif and a tap, the tap is active (used for # traffic). When there's just a vif, the vif is active. @@ -336,12 +355,14 @@ def main(): set_external_id(vif, "iface-status", "active") else: set_external_id(row, "iface-status", None) - - new_interfaces[row.name] = new_xvu - interfaces = new_interfaces + iface_ids = new_iface_ids + vm_ids = new_vm_ids txn.commit_block() + unixctl_server.close() + idl.close() + if __name__ == '__main__': try: