Source code for airflow.providers.edge.plugins.edge_executor_plugin

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from __future__ import annotations

import re
from datetime import datetime, timedelta
from pathlib import Path
from typing import TYPE_CHECKING, Any

from flask import Blueprint, redirect, request, url_for
from flask_appbuilder import BaseView, expose
from markupsafe import Markup
from sqlalchemy import select

from airflow.configuration import conf
from airflow.exceptions import AirflowConfigException
from airflow.models.taskinstance import TaskInstanceState
from airflow.plugins_manager import AirflowPlugin
from airflow.providers.edge.version_compat import AIRFLOW_V_3_0_PLUS
from airflow.utils.state import State

if AIRFLOW_V_3_0_PLUS:
    from airflow.api_fastapi.auth.managers.models.resource_details import AccessView
    from airflow.providers.fab.www.auth import has_access_view

else:
    from airflow.auth.managers.models.resource_details import AccessView  # type: ignore[no-redef]
    from airflow.www.auth import has_access_view  # type: ignore[no-redef]
from airflow.utils.session import NEW_SESSION, provide_session
from airflow.utils.yaml import safe_load

if TYPE_CHECKING:
    from sqlalchemy.orm import Session


def _get_airflow_2_api_endpoint() -> Blueprint:
    from airflow.www.constants import SWAGGER_BUNDLE, SWAGGER_ENABLED
    from airflow.www.extensions.init_views import _CustomErrorRequestBodyValidator, _LazyResolver

    folder = Path(__file__).parents[1].resolve()  # this is airflow/providers/edge/
    with folder.joinpath("openapi", "edge_worker_api_v1.yaml").open() as f:
        specification = safe_load(f)
    from connexion import FlaskApi

    bp = FlaskApi(
        specification=specification,
        resolver=_LazyResolver(),
        base_path="/edge_worker/v1",
        strict_validation=True,
        options={"swagger_ui": SWAGGER_ENABLED, "swagger_path": SWAGGER_BUNDLE.__fspath__()},
        validate_responses=True,
        validator_map={"body": _CustomErrorRequestBodyValidator},
    ).blueprint
    # Need to exempt CSRF to make API usable
    from airflow.www.app import csrf

    csrf.exempt(bp)
    return bp


def _get_api_endpoint() -> dict[str, Any]:
    from airflow.providers.edge.worker_api.app import create_edge_worker_api_app

    return {
        "app": create_edge_worker_api_app(),
        "url_prefix": "/edge_worker/v1",
        "name": "Airflow Edge Worker API",
    }


def _state_token(state):
    """Return a formatted string with HTML for a given State."""
    color = State.color(state)
    fg_color = State.color_fg(state)
    return Markup(
        """
        <span class="label" style="color:{fg_color}; background-color:{color};"
            title="Current State: {state}">{state}</span>
        """
    ).format(color=color, state=state, fg_color=fg_color)


[docs] def modify_maintenance_comment_on_update(maintenance_comment: str | None, username: str) -> str: if maintenance_comment: if re.search( r"^\[[-\d:\s]+\] - .+ put node into maintenance mode\r?\nComment:.*", maintenance_comment ): return re.sub( r"^\[[-\d:\s]+\] - .+ put node into maintenance mode\r?\nComment:", f'[{datetime.now().strftime("%Y-%m-%d %H:%M")}] - {username} updated maintenance mode\nComment:', maintenance_comment, ) elif re.search(r"^\[[-\d:\s]+\] - .+ updated maintenance mode\r?\nComment:.*", maintenance_comment): return re.sub( r"^\[[-\d:\s]+\] - .+ updated maintenance mode\r?\nComment:", f'[{datetime.now().strftime("%Y-%m-%d %H:%M")}] - {username} updated maintenance mode\nComment:', maintenance_comment, ) return f'[{datetime.now().strftime("%Y-%m-%d %H:%M")}] - {username} updated maintenance mode\nComment: {maintenance_comment}' return f'[{datetime.now().strftime("%Y-%m-%d %H:%M")}] - {username} updated maintenance mode\nComment:'
# registers airflow/providers/edge/plugins/templates as a Jinja template folder
[docs] template_bp = Blueprint( "template_blueprint", __name__, template_folder="templates", )
[docs] class EdgeWorkerJobs(BaseView): """Simple view to show Edge Worker jobs."""
[docs] default_view = "jobs"
@expose("/jobs") @has_access_view(AccessView.JOBS) @provide_session
[docs] def jobs(self, session: Session = NEW_SESSION): from airflow.providers.edge.models.edge_job import EdgeJobModel jobs = session.scalars(select(EdgeJobModel).order_by(EdgeJobModel.queued_dttm)).all() html_states = { str(state): _state_token(str(state)) for state in TaskInstanceState.__members__.values() } return self.render_template("edge_worker_jobs.html", jobs=jobs, html_states=html_states)
[docs] class EdgeWorkerHosts(BaseView): """Simple view to show Edge Worker status."""
[docs] default_view = "status"
@expose("/status") @has_access_view(AccessView.JOBS) @provide_session
[docs] def status(self, session: Session = NEW_SESSION): from airflow.providers.edge.models.edge_worker import EdgeWorkerModel hosts = session.scalars(select(EdgeWorkerModel).order_by(EdgeWorkerModel.worker_name)).all() five_min_ago = datetime.now() - timedelta(minutes=5) return self.render_template("edge_worker_hosts.html", hosts=hosts, five_min_ago=five_min_ago)
@expose("/status/maintenance/<string:worker_name>/on", methods=["POST"]) @has_access_view(AccessView.JOBS)
[docs] def worker_to_maintenance(self, worker_name: str): from flask_login import current_user from airflow.providers.edge.models.edge_worker import request_maintenance maintenance_comment = request.form.get("maintenance_comment") maintenance_comment = f'[{datetime.now().strftime("%Y-%m-%d %H:%M")}] - {current_user.username} put node into maintenance mode\nComment: {maintenance_comment}' request_maintenance(worker_name, maintenance_comment) return redirect(url_for("EdgeWorkerHosts.status"))
@expose("/status/maintenance/<string:worker_name>/off", methods=["POST"]) @has_access_view(AccessView.JOBS)
[docs] def remove_worker_from_maintenance(self, worker_name: str): from airflow.providers.edge.models.edge_worker import exit_maintenance exit_maintenance(worker_name) return redirect(url_for("EdgeWorkerHosts.status"))
@expose("/status/maintenance/<string:worker_name>/remove", methods=["POST"]) @has_access_view(AccessView.JOBS)
[docs] def remove_worker(self, worker_name: str): from airflow.providers.edge.models.edge_worker import remove_worker remove_worker(worker_name) return redirect(url_for("EdgeWorkerHosts.status"))
@expose("/status/maintenance/<string:worker_name>/change_comment", methods=["POST"]) @has_access_view(AccessView.JOBS)
[docs] def change_maintenance_comment(self, worker_name: str): from flask_login import current_user from airflow.providers.edge.models.edge_worker import change_maintenance_comment maintenance_comment = request.form.get("maintenance_comment") maintenance_comment = modify_maintenance_comment_on_update(maintenance_comment, current_user.username) change_maintenance_comment(worker_name, maintenance_comment) return redirect(url_for("EdgeWorkerHosts.status"))
# Check if EdgeExecutor is actually loaded try:
[docs] EDGE_EXECUTOR_ACTIVE = conf.getboolean("edge", "api_enabled", fallback="False")
except AirflowConfigException: EDGE_EXECUTOR_ACTIVE = False
[docs] class EdgeExecutorPlugin(AirflowPlugin): """EdgeExecutor Plugin - provides API endpoints for Edge Workers in Webserver."""
[docs] name = "edge_executor"
if EDGE_EXECUTOR_ACTIVE:
[docs] appbuilder_views = [ { "name": "Edge Worker Jobs", "category": "Admin", "view": EdgeWorkerJobs(), }, { "name": "Edge Worker Hosts", "category": "Admin", "view": EdgeWorkerHosts(), }, ]
if AIRFLOW_V_3_0_PLUS: fastapi_apps = [_get_api_endpoint()] flask_blueprints = [template_bp] else: flask_blueprints = [_get_airflow_2_api_endpoint(), template_bp]

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