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https://github.com/GNS3/gns3-server
synced 2024-11-24 09:18:08 +00:00
Merge pull request #568 from GNS3/watch_dynamips_change
Watch for dynamips rom & nvram change
This commit is contained in:
commit
3aea16c527
@ -35,6 +35,8 @@ from ...base_node import BaseNode
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from ..dynamips_error import DynamipsError
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from ..nios.nio_udp import NIOUDP
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from gns3server.utils.file_watcher import FileWatcher
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from gns3server.utils.asyncio import wait_run_in_executor, monitor_process
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from gns3server.utils.images import md5sum
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@ -92,6 +94,7 @@ class Router(BaseNode):
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self._system_id = "FTX0945W0MY" # processor board ID in IOS
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self._slots = []
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self._ghost_flag = ghost_flag
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self._memory_watcher = None
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if not ghost_flag:
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if not dynamips_id:
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@ -160,6 +163,12 @@ class Router(BaseNode):
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return router_info
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def _memory_changed(self, path):
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"""
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Called when the NVRAM file has changed
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"""
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asyncio.async(self.save_configs())
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@property
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def dynamips_id(self):
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"""
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@ -248,6 +257,8 @@ class Router(BaseNode):
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yield from self._hypervisor.send('vm start "{name}"'.format(name=self._name))
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self.status = "started"
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log.info('router "{name}" [{id}] has been started'.format(name=self._name, id=self._id))
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self._memory_watcher = FileWatcher(self._memory_files(), self._memory_changed, strategy='hash', delay=30)
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monitor_process(self._hypervisor.process, self._termination_callback)
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@asyncio.coroutine
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@ -278,6 +289,9 @@ class Router(BaseNode):
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log.warn("Could not stop {}: {}".format(self._name, e))
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self.status = "stopped"
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log.info('Router "{name}" [{id}] has been stopped'.format(name=self._name, id=self._id))
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if self._memory_watcher:
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self._memory_watcher.close()
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self._memory_watcher = None
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yield from self.save_configs()
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@asyncio.coroutine
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@ -1599,3 +1613,10 @@ class Router(BaseNode):
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yield from self._hypervisor.send('vm clean_delete "{}"'.format(self._name))
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self._hypervisor.devices.remove(self)
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log.info('Router "{name}" [{id}] has been deleted (including associated files)'.format(name=self._name, id=self._id))
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def _memory_files(self):
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project_dir = os.path.join(self.project.module_working_directory(self.manager.module_name.lower()))
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return [
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os.path.join(project_dir, "{}_i{}_rom".format(self.platform, self.dynamips_id)),
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os.path.join(project_dir, "{}_i{}_nvram".format(self.platform, self.dynamips_id))
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]
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@ -503,7 +503,7 @@ class IOUVM(BaseNode):
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# check if there is enough RAM to run
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self.check_available_ram(self.ram)
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self._nvram_watcher = FileWatcher(self._nvram_file(), self._nvram_changed)
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self._nvram_watcher = FileWatcher(self._nvram_file(), self._nvram_changed, delay=10)
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# created a environment variable pointing to the iourc file.
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env = os.environ.copy()
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@ -15,6 +15,7 @@
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import zlib
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import asyncio
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import os
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@ -22,20 +23,43 @@ import os
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class FileWatcher:
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"""
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Watch for file change and call the callback when something happen
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:param paths: A path or a list of file to watch
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:param delay: Delay between file check (seconds)
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:param strategy: File change strategy (mtime: modification time, hash: hash compute)
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"""
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def __init__(self, path, callback, delay=1):
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if not isinstance(path, str):
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path = str(path)
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self._path = path
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def __init__(self, paths, callback, delay=1, strategy='mtime'):
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self._paths = []
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if not isinstance(paths, list):
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paths = [paths]
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for path in paths:
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if not isinstance(path, str):
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path = str(path)
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self._paths.append(path)
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self._callback = callback
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self._delay = delay
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self._closed = False
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self._strategy = strategy
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try:
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self._mtime = os.stat(path).st_mtime_ns
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except OSError:
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self._mtime = None
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if self._strategy == 'mtime':
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# Store modification time
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self._mtime = {}
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for path in self._paths:
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try:
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self._mtime[path] = os.stat(path).st_mtime_ns
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except OSError:
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self._mtime[path] = None
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else:
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# Store hash
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self._hashed = {}
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for path in self._paths:
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try:
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# Alder32 is a fast bu insecure hash algorithm
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self._hashed[path] = zlib.adler32(open(path, 'rb').read())
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except OSError:
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self._hashed[path] = None
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asyncio.get_event_loop().call_later(self._delay, self._check_config_file_change)
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def __del__(self):
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@ -48,15 +72,26 @@ class FileWatcher:
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if self._closed:
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return
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changed = False
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try:
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mtime = os.stat(self._path).st_mtime_ns
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if mtime != self._mtime:
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changed = True
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self._mtime = mtime
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except OSError:
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self._mtime = None
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if changed:
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self._callback(self._path)
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for path in self._paths:
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if self._strategy == 'mtime':
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try:
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mtime = os.stat(path).st_mtime_ns
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if mtime != self._mtime[path]:
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changed = True
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self._mtime[path] = mtime
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except OSError:
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self._mtime[path] = None
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else:
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try:
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hashc = zlib.adler32(open(path, 'rb').read())
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if hashc != self._hashed[path]:
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changed = True
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self._hashed[path] = hashc
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except OSError:
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self._hashed[path] = None
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if changed:
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self._callback(path)
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asyncio.get_event_loop().call_later(self._delay, self._check_config_file_change)
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@property
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@ -15,6 +15,7 @@
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import pytest
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import asyncio
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from unittest.mock import MagicMock
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@ -22,11 +23,12 @@ from unittest.mock import MagicMock
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from gns3server.utils.file_watcher import FileWatcher
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def test_file_watcher(async_run, tmpdir):
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@pytest.mark.parametrize("strategy", ['mtime', 'hash'])
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def test_file_watcher(async_run, tmpdir, strategy):
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file = tmpdir / "test"
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file.write("a")
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callback = MagicMock()
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fw = FileWatcher(file, callback, delay=0.5)
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fw = FileWatcher(file, callback, delay=0.5, strategy=strategy)
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async_run(asyncio.sleep(1))
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assert not callback.called
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file.write("b")
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@ -34,12 +36,29 @@ def test_file_watcher(async_run, tmpdir):
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callback.assert_called_with(str(file))
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def test_file_watcher_not_existing(async_run, tmpdir):
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@pytest.mark.parametrize("strategy", ['mtime', 'hash'])
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def test_file_watcher_not_existing(async_run, tmpdir, strategy):
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file = tmpdir / "test"
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callback = MagicMock()
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fw = FileWatcher(file, callback, delay=0.5)
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fw = FileWatcher(file, callback, delay=0.5, strategy=strategy)
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async_run(asyncio.sleep(1))
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assert not callback.called
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file.write("b")
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async_run(asyncio.sleep(1.5))
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callback.assert_called_with(str(file))
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@pytest.mark.parametrize("strategy", ['mtime', 'hash'])
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def test_file_watcher_list(async_run, tmpdir, strategy):
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file = tmpdir / "test"
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file.write("a")
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file2 = tmpdir / "test2"
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callback = MagicMock()
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fw = FileWatcher([file, file2], callback, delay=0.5, strategy=strategy)
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async_run(asyncio.sleep(1))
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assert not callback.called
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file2.write("b")
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async_run(asyncio.sleep(1.5))
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callback.assert_called_with(str(file2))
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