58 lines
1.9 KiB
Python
58 lines
1.9 KiB
Python
import logging
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from typing import Callable, Dict
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import vllm.envs as envs
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logger = logging.getLogger(__name__)
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# make sure one process only loads plugins once
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plugins_loaded = False
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def load_plugins_by_group(group: str) -> Dict[str, Callable]:
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import sys
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if sys.version_info < (3, 10):
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from importlib_metadata import entry_points
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else:
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from importlib.metadata import entry_points
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allowed_plugins = envs.VLLM_PLUGINS
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discovered_plugins = entry_points(group=group)
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if len(discovered_plugins) == 0:
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logger.debug("No plugins for group %s found.", group)
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return {}
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logger.info("Available plugins for group %s:", group)
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for plugin in discovered_plugins:
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logger.info("name=%s, value=%s", plugin.name, plugin.value)
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if allowed_plugins is None:
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logger.info("all available plugins for group %s will be loaded.",
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group)
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logger.info("set environment variable VLLM_PLUGINS to control"
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" which plugins to load.")
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plugins = {}
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for plugin in discovered_plugins:
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if allowed_plugins is None or plugin.name in allowed_plugins:
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try:
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func = plugin.load()
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plugins[plugin.name] = func
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logger.info("plugin %s loaded.", plugin.name)
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except Exception:
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logger.exception("Failed to load plugin %s", plugin.name)
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return plugins
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def load_general_plugins():
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"""WARNING: plugins can be loaded for multiple times in different
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processes. They should be designed in a way that they can be loaded
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multiple times without causing issues.
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"""
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global plugins_loaded
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if plugins_loaded:
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return
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plugins_loaded = True
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plugins = load_plugins_by_group(group='vllm.general_plugins')
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# general plugins, we only need to execute the loaded functions
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for func in plugins.values():
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func()
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