7:41 a.m.
From: Ondrej Lichtner <olichtne(a)redhat.com>
This module defines the Controller class that brings together individual
implementation parts of an LNST Controller. When instantiated, it allows
the tester to configure and run his own recipes with the LNST
'infrastructure'.
This way, the lnst.Controller package is a Python library allowing the
creation of your own LNST Controller.
In theory multiple instances of the Controller class are possible and
you can therefore run multiple recipes in parallel, though this is not
supported and wasn't tested yet.
More info is available in the doc strings of the Controller class.
Signed-off-by: Ondrej Lichtner <olichtne(a)redhat.com>
---
lnst/Controller/Controller.py | 220 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 220 insertions(+)
create mode 100644 lnst/Controller/Controller.py
diff --git a/lnst/Controller/Controller.py b/lnst/Controller/Controller.py
new file mode 100644
index 0000000..7848750
--- /dev/null
+++ b/lnst/Controller/Controller.py
@@ -0,0 +1,220 @@
+"""
+This module defines the Controller class that brings together individual
+implementation parts of an LNST Controller. When instantiated, it allows the
+tester to configure and run his own recipes with the LNST 'infrastructure'.
+
+Copyright 2017 Red Hat, Inc.
+Licensed under the GNU General Public License, version 2 as
+published by the Free Software Foundation; see COPYING for details.
+"""
+
+__author__ = """
+olichtne(a)redhat.com (Ondrej Lichtner)
+"""
+
+import os
+import sys
+import datetime
+import logging
+import socket
+from lnst.Common.Logs import LoggingCtl
+from lnst.Common.NetUtils import MacPool
+from lnst.Common.LnstError import LnstError
+from lnst.Common.Utils import mkdir_p
+from lnst.Devices import VirtualDevice
+from lnst.Controller.Common import ControllerError
+from lnst.Controller.Config import CtlConfig
+from lnst.Controller.MessageDispatcher import MessageDispatcher
+from lnst.Controller.SlavePoolManager import SlavePoolManager
+from lnst.Controller.MachineMapper import MachineMapper
+from lnst.Controller.Host import Hosts, Host
+from lnst.Controller.Requirements import DeviceReq
+from lnst.Controller.Recipe import BaseRecipe
+
+class Controller(object):
+ """The LNST Controller class
+
+ Most importantly allows the tester to run instantiated Recipe tests using
+ the LNST infrastructure.
+
+ Can be configured with custom implementation of several objects used for
+ setting up the infrastructure.
+ """
+
+ def __init__(self, poolMgr=SlavePoolManager, mapper=MachineMapper,
+ config=None, pools=[], pool_checks=True, debug=0):
+ """
+ Args:
+ poolMgr -- class that implements the SlavePoolManager interface
+ will be instantiated by the Controller to provide the mapper
+ with pools available for matching, also handles the creation
+ of Machine objects (internal LNST class used to access the
+ slave hosts)
+ mapper -- class that implements the MachineMapper interface
+ will be instantiated by the Controller to match Recipe
+ requirements to the available pools
+ config -- optional LNST configuration object, if None the
+ Controller will load it's own configuration from default paths
+ pools -- a list of pool names to restrict the used pool directories
+ pool_checks -- boolean (default True), if False will disable
+ checking online status of Slaves
+ debug -- integer (default 0), sets debug level of LNST
+ """
+ self._config = self._load_ctl_config(config)
+ config = self._config
+
+ mac_pool_range = config.get_option('environment',
'mac_pool_range')
+ self._mac_pool = MacPool(mac_pool_range[0], mac_pool_range[1])
+ self._log_ctl = LoggingCtl(debug,
+ log_dir=config.get_option('environment','log_dir'),
+ log_subdir=datetime.datetime.now().
+ strftime("%Y-%m-%d_%H:%M:%S"),
+ colours=not config.get_option("colours",
"disable_colours"))
+
+ self._msg_dispatcher = MessageDispatcher(self._log_ctl)
+
+ self._network_bridges = {}
+ self._mapper = mapper()
+
+ select_pools = {}
+ conf_pools = config.get_pools()
+ if len(pools) > 0:
+ for pool_name in pools:
+ if pool_name in conf_pools:
+ select_pools[pool_name] = conf_pools[pool_name]
+ elif len(pools) == 1 and os.path.isdir(pool_name):
+ select_pools = {"cmd_line_pool": pool_name}
+ else:
+ raise ControllerError("Pool %s does not exist!" %
pool_name)
+ else:
+ select_pools = conf_pools
+
+ self._pools = poolMgr(select_pools, self._msg_dispatcher, config,
+ pool_checks)
+
+ def run(self, recipe, **kwargs):
+ """Execute the provided Recipe
+
+ This method takes care of both finding a Slave hosts matching the Recipe
+ requirements, provisioning them and calling the 'test' method of the
+ Recipe object with proper references to the mapped Hosts
+
+ Args:
+ recipe -- an instantiated Recipe object (isinstance BaseRecipe)
+ kwargs -- optional keyword arguments passed to the configured Mapper
+ """
+ if not isinstance(recipe, BaseRecipe):
+ raise ControllerError("recipe argument must be a BaseRecipe
instance.")
+
+ req = recipe.req
+
+ self._mapper.set_pools(self._pools.get_pools())
+ self._mapper.set_requirements(req._to_dict())
+
+ i = 0
+ for match in self._mapper.matches(**kwargs):
+ self._log_ctl.set_recipe(recipe.__class__.__name__,
+ expand="match_%d" % i)
+ i += 1
+
+ self._print_match_description(match)
+ self._map_match(match, req)
+ try:
+ recipe._set_hosts(self._hosts)
+ recipe.test()
+ except LnstError as exc:
+ logging.error("Recipe execution terminated by unexpected
exception")
+ raise
+ finally:
+ recipe._set_hosts(None)
+ for machine in self._machines.values():
+ machine.restore_system_config()
+ self._cleanup_slaves()
+
+ def _map_match(self, match, requested):
+ self._machines = {}
+ self._hosts = Hosts()
+ pool = self._pools.get_machine_pool(match["pool_name"])
+ for m_id, m in match["machines"].items():
+ machine = self._machines[m_id] = pool[m["target"]]
+
+ machine.set_id(m_id)
+ self._prepare_machine(machine)
+
+ setattr(self._hosts, m_id, Host(machine))
+ host = getattr(self._hosts, m_id)
+ for if_id, i in m["interfaces"].items():
+ host._map_device(if_id, i)
+
+ if match["virtual"]:
+ req_host = getattr(requested, m_id)
+ for name, dev in req_host:
+ new_virt_dev = VirtualDevice(network=dev.label,
+ driver=dev.params.driver,
+ hwaddr=dev.params.hwaddr)
+ setattr(host, name, new_virt_dev)
+
+ def _prepare_machine(self, machine):
+ self._log_ctl.add_slave(machine.get_id())
+ machine.set_mac_pool(self._mac_pool)
+ machine.set_network_bridges(self._network_bridges)
+
+ recipe_name = os.path.basename(sys.argv[0])
+ machine.set_recipe(recipe_name)
+
+ def _cleanup_slaves(self):
+ if self._machines == None:
+ return
+
+ for m_id, machine in self._machines.iteritems():
+ machine.cleanup()
+ #clean-up slave logger
+ self._log_ctl.remove_slave(m_id)
+
+ self._machines.clear()
+
+ # remove dynamically created bridges
+ for bridge in self._network_bridges.itervalues():
+ bridge.cleanup()
+ self._network_bridges = {}
+
+ def _load_ctl_config(self, config):
+ if isinstance(config, CtlConfig):
+ return config
+ else:
+ config = CtlConfig()
+ try:
+ config.load_config('/etc/lnst-ctl.conf')
+ except:
+ pass
+
+ usr_cfg = os.path.expanduser('~/.lnst/lnst-ctl.conf')
+ if os.path.isfile(usr_cfg):
+ config.load_config(usr_cfg)
+ else:
+ usr_cfg_dir = os.path.dirname(usr_cfg)
+ pool_dir = usr_cfg_dir + "/pool"
+ mkdir_p(pool_dir)
+ global_pools = config.get_section("pools")
+ if (len(global_pools) == 0):
+ config.add_pool("default", pool_dir, usr_cfg)
+ with open(usr_cfg, 'w') as f:
+ f.write(config.dump_config())
+
+ dirname = os.path.dirname(sys.argv[0])
+ gitcfg = os.path.join(dirname, "lnst-ctl.conf")
+ if os.path.isfile(gitcfg):
+ config.load_config(gitcfg)
+
+ return config
+
+ def _print_match_description(self, match):
+ logging.info("Pool match description:")
+ if match["virtual"]:
+ logging.info(" Setup is using virtual machines.")
+ for m_id, m in sorted(match["machines"].iteritems()):
+ logging.info(" host \"%s\" uses \"%s\"" %
(m_id, m["target"]))
+ for if_id, match in m["interfaces"].iteritems():
+ pool_id = match["target"]
+ logging.info(" interface \"%s\" matched to
\"%s\"" %\
+ (if_id, pool_id))
--
2.12.2