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views.py
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views.py
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#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
import copy
import itertools
import json
import logging
import math
import socket
import sys
import traceback
from collections import defaultdict
from datetime import timedelta
from json import JSONDecodeError
from operator import itemgetter
from typing import Iterable, List, Optional, Tuple
from urllib.parse import parse_qsl, unquote, urlencode, urlparse
import lazy_object_proxy
import nvd3
import sqlalchemy as sqla
from flask import (
Markup,
Response,
abort,
before_render_template,
current_app,
escape,
flash,
g,
jsonify,
make_response,
redirect,
render_template,
request,
session as flask_session,
url_for,
)
from flask_appbuilder import BaseView, ModelView, expose
from flask_appbuilder.actions import action
from flask_appbuilder.fieldwidgets import Select2Widget
from flask_appbuilder.models.sqla.filters import BaseFilter # noqa
from flask_appbuilder.security.views import (
PermissionModelView,
PermissionViewModelView,
ResetMyPasswordView,
ResetPasswordView,
RoleModelView,
UserDBModelView,
UserInfoEditView,
UserLDAPModelView,
UserOAuthModelView,
UserOIDModelView,
UserRemoteUserModelView,
UserStatsChartView,
ViewMenuModelView,
)
from flask_appbuilder.widgets import FormWidget
from flask_babel import lazy_gettext
from jinja2.utils import htmlsafe_json_dumps, pformat # type: ignore
from pendulum.datetime import DateTime
from pygments import highlight, lexers
from pygments.formatters import HtmlFormatter # noqa pylint: disable=no-name-in-module
from sqlalchemy import and_, desc, func, or_, union_all
from sqlalchemy.orm import joinedload
from wtforms import SelectField, validators
from wtforms.validators import InputRequired
import airflow
from airflow import models, plugins_manager, settings
from airflow.api.common.experimental.mark_tasks import (
set_dag_run_state_to_failed,
set_dag_run_state_to_success,
)
from airflow.configuration import AIRFLOW_CONFIG, conf
from airflow.exceptions import AirflowException
from airflow.executors.executor_loader import ExecutorLoader
from airflow.jobs.base_job import BaseJob
from airflow.jobs.scheduler_job import SchedulerJob
from airflow.models import DAG, Connection, DagModel, DagTag, Log, SlaMiss, TaskFail, XCom, errors
from airflow.models.baseoperator import BaseOperator
from airflow.models.dagcode import DagCode
from airflow.models.dagrun import DagRun, DagRunType
from airflow.models.serialized_dag import SerializedDagModel
from airflow.models.taskinstance import TaskInstance
from airflow.providers_manager import ProvidersManager
from airflow.security import permissions
from airflow.ti_deps.dep_context import DepContext
from airflow.ti_deps.dependencies_deps import RUNNING_DEPS, SCHEDULER_QUEUED_DEPS
from airflow.utils import json as utils_json, timezone, yaml
from airflow.utils.dates import infer_time_unit, scale_time_units
from airflow.utils.docs import get_docs_url
from airflow.utils.helpers import alchemy_to_dict
from airflow.utils.log import secrets_masker
from airflow.utils.log.log_reader import TaskLogReader
from airflow.utils.session import create_session, provide_session
from airflow.utils.state import State
from airflow.version import version
from airflow.www import auth, utils as wwwutils
from airflow.www.decorators import action_logging, gzipped
from airflow.www.forms import (
ConnectionForm,
DagRunEditForm,
DagRunForm,
DateTimeForm,
DateTimeWithNumRunsForm,
DateTimeWithNumRunsWithDagRunsForm,
TaskInstanceEditForm,
)
from airflow.www.widgets import AirflowModelListWidget
PAGE_SIZE = conf.getint('webserver', 'page_size')
FILTER_TAGS_COOKIE = 'tags_filter'
FILTER_STATUS_COOKIE = 'dag_status_filter'
def truncate_task_duration(task_duration):
"""
Cast the task_duration to an int was for optimization for large/huge dags if task_duration > 10s
otherwise we keep it as a float with 3dp
"""
return int(task_duration) if task_duration > 10.0 else round(task_duration, 3)
def get_safe_url(url):
"""Given a user-supplied URL, ensure it points to our web server"""
valid_schemes = ['http', 'https', '']
valid_netlocs = [request.host, '']
if not url:
return url_for('Airflow.index')
parsed = urlparse(url)
# If the url contains semicolon, redirect it to homepage to avoid
# potential XSS. (Similar to https://github.com/python/cpython/pull/24297/files (bpo-42967))
if ';' in unquote(url):
return url_for('Airflow.index')
query = parse_qsl(parsed.query, keep_blank_values=True)
url = parsed._replace(query=urlencode(query)).geturl()
if parsed.scheme in valid_schemes and parsed.netloc in valid_netlocs:
return url
return url_for('Airflow.index')
def get_date_time_num_runs_dag_runs_form_data(www_request, session, dag):
"""Get Execution Data, Base Date & Number of runs from a Request"""
date_time = www_request.args.get('execution_date')
if date_time:
date_time = timezone.parse(date_time)
else:
date_time = dag.get_latest_execution_date(session=session) or timezone.utcnow()
base_date = www_request.args.get('base_date')
if base_date:
base_date = timezone.parse(base_date)
else:
# The DateTimeField widget truncates milliseconds and would loose
# the first dag run. Round to next second.
base_date = (date_time + timedelta(seconds=1)).replace(microsecond=0)
default_dag_run = conf.getint('webserver', 'default_dag_run_display_number')
num_runs = www_request.args.get('num_runs', default=default_dag_run, type=int)
drs = (
session.query(DagRun)
.filter(DagRun.dag_id == dag.dag_id, DagRun.execution_date <= base_date)
.order_by(desc(DagRun.execution_date))
.limit(num_runs)
.all()
)
dr_choices = []
dr_state = None
for dr in drs:
dr_choices.append((dr.execution_date.isoformat(), dr.run_id))
if date_time == dr.execution_date:
dr_state = dr.state
# Happens if base_date was changed and the selected dag run is not in result
if not dr_state and drs:
dr = drs[0]
date_time = dr.execution_date
dr_state = dr.state
return {
'dttm': date_time,
'base_date': base_date,
'num_runs': num_runs,
'execution_date': date_time.isoformat(),
'dr_choices': dr_choices,
'dr_state': dr_state,
}
def task_group_to_dict(task_group):
"""
Create a nested dict representation of this TaskGroup and its children used to construct
the Graph View.
"""
if isinstance(task_group, BaseOperator):
return {
'id': task_group.task_id,
'value': {
'label': task_group.label,
'labelStyle': f"fill:{task_group.ui_fgcolor};",
'style': f"fill:{task_group.ui_color};",
'rx': 5,
'ry': 5,
},
}
children = [
task_group_to_dict(child) for child in sorted(task_group.children.values(), key=lambda t: t.label)
]
if task_group.upstream_group_ids or task_group.upstream_task_ids:
children.append(
{
'id': task_group.upstream_join_id,
'value': {
'label': '',
'labelStyle': f"fill:{task_group.ui_fgcolor};",
'style': f"fill:{task_group.ui_color};",
'shape': 'circle',
},
}
)
if task_group.downstream_group_ids or task_group.downstream_task_ids:
# This is the join node used to reduce the number of edges between two TaskGroup.
children.append(
{
'id': task_group.downstream_join_id,
'value': {
'label': '',
'labelStyle': f"fill:{task_group.ui_fgcolor};",
'style': f"fill:{task_group.ui_color};",
'shape': 'circle',
},
}
)
return {
"id": task_group.group_id,
'value': {
'label': task_group.label,
'labelStyle': f"fill:{task_group.ui_fgcolor};",
'style': f"fill:{task_group.ui_color}",
'rx': 5,
'ry': 5,
'clusterLabelPos': 'top',
},
'tooltip': task_group.tooltip,
'children': children,
}
def dag_edges(dag):
"""
Create the list of edges needed to construct the Graph View.
A special case is made if a TaskGroup is immediately upstream/downstream of another
TaskGroup or task. Two dummy nodes named upstream_join_id and downstream_join_id are
created for the TaskGroup. Instead of drawing an edge onto every task in the TaskGroup,
all edges are directed onto the dummy nodes. This is to cut down the number of edges on
the graph.
For example: A DAG with TaskGroups group1 and group2:
group1: task1, task2, task3
group2: task4, task5, task6
group2 is downstream of group1:
group1 >> group2
Edges to add (This avoids having to create edges between every task in group1 and group2):
task1 >> downstream_join_id
task2 >> downstream_join_id
task3 >> downstream_join_id
downstream_join_id >> upstream_join_id
upstream_join_id >> task4
upstream_join_id >> task5
upstream_join_id >> task6
"""
# Edges to add between TaskGroup
edges_to_add = set()
# Edges to remove between individual tasks that are replaced by edges_to_add.
edges_to_skip = set()
task_group_map = dag.task_group.get_task_group_dict()
def collect_edges(task_group):
"""Update edges_to_add and edges_to_skip according to TaskGroups."""
if isinstance(task_group, BaseOperator):
return
for target_id in task_group.downstream_group_ids:
# For every TaskGroup immediately downstream, add edges between downstream_join_id
# and upstream_join_id. Skip edges between individual tasks of the TaskGroups.
target_group = task_group_map[target_id]
edges_to_add.add((task_group.downstream_join_id, target_group.upstream_join_id))
for child in task_group.get_leaves():
edges_to_add.add((child.task_id, task_group.downstream_join_id))
for target in target_group.get_roots():
edges_to_skip.add((child.task_id, target.task_id))
edges_to_skip.add((child.task_id, target_group.upstream_join_id))
for child in target_group.get_roots():
edges_to_add.add((target_group.upstream_join_id, child.task_id))
edges_to_skip.add((task_group.downstream_join_id, child.task_id))
# For every individual task immediately downstream, add edges between downstream_join_id and
# the downstream task. Skip edges between individual tasks of the TaskGroup and the
# downstream task.
for target_id in task_group.downstream_task_ids:
edges_to_add.add((task_group.downstream_join_id, target_id))
for child in task_group.get_leaves():
edges_to_add.add((child.task_id, task_group.downstream_join_id))
edges_to_skip.add((child.task_id, target_id))
# For every individual task immediately upstream, add edges between the upstream task
# and upstream_join_id. Skip edges between the upstream task and individual tasks
# of the TaskGroup.
for source_id in task_group.upstream_task_ids:
edges_to_add.add((source_id, task_group.upstream_join_id))
for child in task_group.get_roots():
edges_to_add.add((task_group.upstream_join_id, child.task_id))
edges_to_skip.add((source_id, child.task_id))
for child in task_group.children.values():
collect_edges(child)
collect_edges(dag.task_group)
# Collect all the edges between individual tasks
edges = set()
def get_downstream(task):
for child in task.downstream_list:
edge = (task.task_id, child.task_id)
if edge not in edges:
edges.add(edge)
get_downstream(child)
for root in dag.roots:
get_downstream(root)
result = []
# Build result dicts with the two ends of the edge, plus any extra metadata
# if we have it.
for source_id, target_id in sorted(edges.union(edges_to_add) - edges_to_skip):
record = {"source_id": source_id, "target_id": target_id}
label = dag.get_edge_info(source_id, target_id).get("label")
if label:
record["label"] = label
result.append(record)
return result
######################################################################################
# Error handlers
######################################################################################
def circles(error): # pylint: disable=unused-argument
"""Show Circles on screen for any error in the Webserver"""
return (
render_template(
'airflow/circles.html',
hostname=socket.getfqdn()
if conf.getboolean('webserver', 'EXPOSE_HOSTNAME', fallback=True) # noqa
else 'redact',
),
404,
)
def show_traceback(error): # pylint: disable=unused-argument
"""Show Traceback for a given error"""
return (
render_template(
'airflow/traceback.html', # noqa
python_version=sys.version.split(" ")[0],
airflow_version=version,
hostname=socket.getfqdn()
if conf.getboolean('webserver', 'EXPOSE_HOSTNAME', fallback=True)
else 'redact',
info=traceback.format_exc()
if conf.getboolean('webserver', 'EXPOSE_STACKTRACE', fallback=True)
else 'Error! Please contact server admin.',
),
500,
)
######################################################################################
# BaseViews
######################################################################################
class AirflowBaseView(BaseView): # noqa: D101
"""Base View to set Airflow related properties"""
from airflow import macros
route_base = ''
# Make our macros available to our UI templates too.
extra_args = {
'macros': macros,
}
def render_template(self, *args, **kwargs):
return super().render_template(
*args,
# Cache this at most once per request, not for the lifetime of the view instance
scheduler_job=lazy_object_proxy.Proxy(SchedulerJob.most_recent_job),
**kwargs,
)
def add_user_permissions_to_dag(sender, template, context, **extra): # noqa pylint: disable=unused-argument
"""
Adds `.can_edit`, `.can_trigger`, and `.can_delete` properties
to DAG based on current user's permissions.
Located in `views.py` rather than the DAG model to keep
permissions logic out of the Airflow core.
"""
if 'dag' in context:
dag = context['dag']
can_create_dag_run = current_app.appbuilder.sm.has_access(
permissions.ACTION_CAN_CREATE, permissions.RESOURCE_DAG_RUN
)
dag.can_edit = current_app.appbuilder.sm.can_edit_dag(dag.dag_id)
dag.can_trigger = dag.can_edit and can_create_dag_run
dag.can_delete = current_app.appbuilder.sm.has_access(
permissions.ACTION_CAN_DELETE,
permissions.RESOURCE_DAG,
)
context['dag'] = dag
before_render_template.connect(add_user_permissions_to_dag)
class Airflow(AirflowBaseView): # noqa: D101 pylint: disable=too-many-public-methods
"""Main Airflow application."""
@expose('/health')
def health(self):
"""
An endpoint helping check the health status of the Airflow instance,
including metadatabase and scheduler.
"""
payload = {'metadatabase': {'status': 'unhealthy'}}
latest_scheduler_heartbeat = None
scheduler_status = 'unhealthy'
payload['metadatabase'] = {'status': 'healthy'}
try:
scheduler_job = SchedulerJob.most_recent_job()
if scheduler_job:
latest_scheduler_heartbeat = scheduler_job.latest_heartbeat.isoformat()
if scheduler_job.is_alive():
scheduler_status = 'healthy'
except Exception: # noqa pylint: disable=broad-except
payload['metadatabase']['status'] = 'unhealthy'
payload['scheduler'] = {
'status': scheduler_status,
'latest_scheduler_heartbeat': latest_scheduler_heartbeat,
}
return wwwutils.json_response(payload)
@expose('/home')
@auth.has_access(
[
(permissions.ACTION_CAN_READ, permissions.RESOURCE_WEBSITE),
]
) # pylint: disable=too-many-locals,too-many-statements
def index(self):
"""Home view."""
hide_paused_dags_by_default = conf.getboolean('webserver', 'hide_paused_dags_by_default')
default_dag_run = conf.getint('webserver', 'default_dag_run_display_number')
num_runs = request.args.get('num_runs', default=default_dag_run, type=int)
current_page = request.args.get('page', default=0, type=int)
arg_search_query = request.args.get('search')
arg_tags_filter = request.args.getlist('tags')
arg_status_filter = request.args.get('status')
if request.args.get('reset_tags') is not None:
flask_session[FILTER_TAGS_COOKIE] = None
# Remove the reset_tags=reset from the URL
return redirect(url_for('Airflow.index'))
cookie_val = flask_session.get(FILTER_TAGS_COOKIE)
if arg_tags_filter:
flask_session[FILTER_TAGS_COOKIE] = ','.join(arg_tags_filter)
elif cookie_val:
# If tags exist in cookie, but not URL, add them to the URL
return redirect(url_for('Airflow.index', tags=cookie_val.split(',')))
if arg_status_filter is None:
cookie_val = flask_session.get(FILTER_STATUS_COOKIE)
if cookie_val:
arg_status_filter = cookie_val
else:
arg_status_filter = 'active' if hide_paused_dags_by_default else 'all'
flask_session[FILTER_STATUS_COOKIE] = arg_status_filter
else:
status = arg_status_filter.strip().lower()
flask_session[FILTER_STATUS_COOKIE] = status
arg_status_filter = status
dags_per_page = PAGE_SIZE
start = current_page * dags_per_page
end = start + dags_per_page
# Get all the dag id the user could access
filter_dag_ids = current_app.appbuilder.sm.get_accessible_dag_ids(g.user)
with create_session() as session:
# read orm_dags from the db
dags_query = session.query(DagModel).filter(~DagModel.is_subdag, DagModel.is_active)
# pylint: disable=no-member
if arg_search_query:
dags_query = dags_query.filter(
DagModel.dag_id.ilike('%' + arg_search_query + '%')
| DagModel.owners.ilike('%' + arg_search_query + '%') # noqa
)
if arg_tags_filter:
dags_query = dags_query.filter(DagModel.tags.any(DagTag.name.in_(arg_tags_filter)))
dags_query = dags_query.filter(DagModel.dag_id.in_(filter_dag_ids))
# pylint: enable=no-member
all_dags = dags_query
active_dags = dags_query.filter(~DagModel.is_paused)
paused_dags = dags_query.filter(DagModel.is_paused)
is_paused_count = dict(
all_dags.with_entities(DagModel.is_paused, func.count(DagModel.dag_id))
.group_by(DagModel.is_paused)
.all()
)
status_count_active = is_paused_count.get(False, 0)
status_count_paused = is_paused_count.get(True, 0)
all_dags_count = status_count_active + status_count_paused
if arg_status_filter == 'active':
current_dags = active_dags
num_of_all_dags = status_count_active
elif arg_status_filter == 'paused':
current_dags = paused_dags
num_of_all_dags = status_count_paused
else:
current_dags = all_dags
num_of_all_dags = all_dags_count
dags = (
current_dags.order_by(DagModel.dag_id)
.options(joinedload(DagModel.tags))
.offset(start)
.limit(dags_per_page)
.all()
)
user_permissions = current_app.appbuilder.sm.get_current_user_permissions()
all_dags_editable = (permissions.ACTION_CAN_EDIT, permissions.RESOURCE_DAG) in user_permissions
can_create_dag_run = (
permissions.ACTION_CAN_CREATE,
permissions.RESOURCE_DAG_RUN,
) in user_permissions
can_delete_dag = (
permissions.ACTION_CAN_DELETE,
permissions.RESOURCE_DAG,
) in user_permissions
for dag in dags:
if all_dags_editable:
dag.can_edit = True
else:
dag_resource_name = permissions.RESOURCE_DAG_PREFIX + dag.dag_id
dag.can_edit = (permissions.ACTION_CAN_EDIT, dag_resource_name) in user_permissions
dag.can_trigger = dag.can_edit and can_create_dag_run
dag.can_delete = can_delete_dag
dagtags = session.query(DagTag.name).distinct(DagTag.name).all()
tags = [
{"name": name, "selected": bool(arg_tags_filter and name in arg_tags_filter)}
for name, in dagtags
]
import_errors = session.query(errors.ImportError).order_by(errors.ImportError.id).all()
for import_error in import_errors:
flash("Broken DAG: [{ie.filename}] {ie.stacktrace}".format(ie=import_error), "dag_import_error")
from airflow.plugins_manager import import_errors as plugin_import_errors
for filename, stacktrace in plugin_import_errors.items():
flash(
f"Broken plugin: [{filename}] {stacktrace}",
"error",
)
num_of_pages = int(math.ceil(num_of_all_dags / float(dags_per_page)))
state_color_mapping = State.state_color.copy()
state_color_mapping["null"] = state_color_mapping.pop(None)
page_title = conf.get(section="webserver", key="instance_name", fallback="DAGs")
return self.render_template(
'airflow/dags.html',
dags=dags,
current_page=current_page,
search_query=arg_search_query if arg_search_query else '',
page_title=page_title,
page_size=dags_per_page,
num_of_pages=num_of_pages,
num_dag_from=min(start + 1, num_of_all_dags),
num_dag_to=min(end, num_of_all_dags),
num_of_all_dags=num_of_all_dags,
paging=wwwutils.generate_pages(
current_page,
num_of_pages,
search=escape(arg_search_query) if arg_search_query else None,
status=arg_status_filter if arg_status_filter else None,
tags=arg_tags_filter if arg_tags_filter else None,
),
num_runs=num_runs,
tags=tags,
state_color=state_color_mapping,
status_filter=arg_status_filter,
status_count_all=all_dags_count,
status_count_active=status_count_active,
status_count_paused=status_count_paused,
tags_filter=arg_tags_filter,
)
@expose('/dag_stats', methods=['POST'])
@auth.has_access(
[
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG),
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG_RUN),
]
)
@provide_session
def dag_stats(self, session=None):
"""Dag statistics."""
dr = models.DagRun
allowed_dag_ids = current_app.appbuilder.sm.get_accessible_dag_ids(g.user)
dag_state_stats = session.query(dr.dag_id, dr.state, sqla.func.count(dr.state)).group_by(
dr.dag_id, dr.state
)
# Filter by post parameters
selected_dag_ids = {unquote(dag_id) for dag_id in request.form.getlist('dag_ids') if dag_id}
if selected_dag_ids:
filter_dag_ids = selected_dag_ids.intersection(allowed_dag_ids)
else:
filter_dag_ids = allowed_dag_ids
if not filter_dag_ids:
return wwwutils.json_response({})
payload = {}
dag_state_stats = dag_state_stats.filter(dr.dag_id.in_(filter_dag_ids)) # pylint: disable=no-member
data = {}
for dag_id, state, count in dag_state_stats:
if dag_id not in data:
data[dag_id] = {}
data[dag_id][state] = count
for dag_id in filter_dag_ids:
payload[dag_id] = []
for state in State.dag_states:
count = data.get(dag_id, {}).get(state, 0)
payload[dag_id].append({'state': state, 'count': count})
return wwwutils.json_response(payload)
@expose('/task_stats', methods=['POST'])
@auth.has_access(
[
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG),
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG_RUN),
(permissions.ACTION_CAN_READ, permissions.RESOURCE_TASK_INSTANCE),
]
)
@provide_session
def task_stats(self, session=None):
"""Task Statistics"""
allowed_dag_ids = current_app.appbuilder.sm.get_accessible_dag_ids(g.user)
if not allowed_dag_ids:
return wwwutils.json_response({})
# Filter by post parameters
selected_dag_ids = {unquote(dag_id) for dag_id in request.form.getlist('dag_ids') if dag_id}
if selected_dag_ids:
filter_dag_ids = selected_dag_ids.intersection(allowed_dag_ids)
else:
filter_dag_ids = allowed_dag_ids
# pylint: disable=comparison-with-callable
running_dag_run_query_result = (
session.query(DagRun.dag_id, DagRun.execution_date)
.join(DagModel, DagModel.dag_id == DagRun.dag_id)
.filter(DagRun.state == State.RUNNING, DagModel.is_active)
)
# pylint: enable=comparison-with-callable
# pylint: disable=no-member
running_dag_run_query_result = running_dag_run_query_result.filter(DagRun.dag_id.in_(filter_dag_ids))
# pylint: enable=no-member
running_dag_run_query_result = running_dag_run_query_result.subquery('running_dag_run')
# pylint: disable=no-member
# Select all task_instances from active dag_runs.
running_task_instance_query_result = session.query(
TaskInstance.dag_id.label('dag_id'), TaskInstance.state.label('state')
).join(
running_dag_run_query_result,
and_(
running_dag_run_query_result.c.dag_id == TaskInstance.dag_id,
running_dag_run_query_result.c.execution_date == TaskInstance.execution_date,
),
)
# pylint: enable=no-member
if conf.getboolean('webserver', 'SHOW_RECENT_STATS_FOR_COMPLETED_RUNS', fallback=True):
# pylint: disable=comparison-with-callable
last_dag_run = (
session.query(DagRun.dag_id, sqla.func.max(DagRun.execution_date).label('execution_date'))
.join(DagModel, DagModel.dag_id == DagRun.dag_id)
.filter(DagRun.state != State.RUNNING, DagModel.is_active)
.group_by(DagRun.dag_id)
)
# pylint: enable=comparison-with-callable
# pylint: disable=no-member
last_dag_run = last_dag_run.filter(DagRun.dag_id.in_(filter_dag_ids))
last_dag_run = last_dag_run.subquery('last_dag_run')
# pylint: enable=no-member
# Select all task_instances from active dag_runs.
# If no dag_run is active, return task instances from most recent dag_run.
last_task_instance_query_result = session.query(
TaskInstance.dag_id.label('dag_id'), TaskInstance.state.label('state')
).join(
last_dag_run,
and_(
last_dag_run.c.dag_id == TaskInstance.dag_id,
last_dag_run.c.execution_date == TaskInstance.execution_date,
),
)
final_task_instance_query_result = union_all(
last_task_instance_query_result, running_task_instance_query_result
).alias('final_ti')
else:
final_task_instance_query_result = running_task_instance_query_result.subquery('final_ti')
qry = session.query(
final_task_instance_query_result.c.dag_id,
final_task_instance_query_result.c.state,
sqla.func.count(),
).group_by(final_task_instance_query_result.c.dag_id, final_task_instance_query_result.c.state)
data = {}
for dag_id, state, count in qry:
if dag_id not in data:
data[dag_id] = {}
data[dag_id][state] = count
payload = {}
for dag_id in filter_dag_ids:
payload[dag_id] = []
for state in State.task_states:
count = data.get(dag_id, {}).get(state, 0)
payload[dag_id].append({'state': state, 'count': count})
return wwwutils.json_response(payload)
@expose('/last_dagruns', methods=['POST'])
@auth.has_access(
[
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG),
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG_RUN),
]
)
@provide_session
def last_dagruns(self, session=None):
"""Last DAG runs"""
allowed_dag_ids = current_app.appbuilder.sm.get_accessible_dag_ids(g.user)
# Filter by post parameters
selected_dag_ids = {unquote(dag_id) for dag_id in request.form.getlist('dag_ids') if dag_id}
if selected_dag_ids:
filter_dag_ids = selected_dag_ids.intersection(allowed_dag_ids)
else:
filter_dag_ids = allowed_dag_ids
if not filter_dag_ids:
return wwwutils.json_response({})
query = session.query(
DagRun.dag_id,
sqla.func.max(DagRun.execution_date).label('execution_date'),
sqla.func.max(DagRun.start_date).label('start_date'),
).group_by(DagRun.dag_id)
# Filter to only ask for accessible and selected dags
query = query.filter(DagRun.dag_id.in_(filter_dag_ids)) # pylint: enable=no-member
resp = {
r.dag_id.replace('.', '__dot__'): {
'dag_id': r.dag_id,
'execution_date': r.execution_date.isoformat(),
'start_date': r.start_date.isoformat(),
}
for r in query
}
return wwwutils.json_response(resp)
@expose('/code')
@auth.has_access(
[
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG),
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG_CODE),
]
)
@provide_session
def code(self, session=None):
"""Dag Code."""
all_errors = ""
dag_orm = None
dag_id = None
try:
dag_id = request.args.get('dag_id')
dag_orm = DagModel.get_dagmodel(dag_id, session=session)
code = DagCode.get_code_by_fileloc(dag_orm.fileloc)
html_code = Markup(
highlight(
code, lexers.PythonLexer(), HtmlFormatter(linenos=True) # pylint: disable=no-member
)
)
except Exception as e: # pylint: disable=broad-except
all_errors += (
"Exception encountered during "
+ f"dag_id retrieval/dag retrieval fallback/code highlighting:\n\n{e}\n"
)
html_code = Markup('<p>Failed to load file.</p><p>Details: {}</p>').format( # noqa
escape(all_errors)
)
return self.render_template(
'airflow/dag_code.html',
html_code=html_code,
dag=dag_orm,
title=dag_id,
root=request.args.get('root'),
wrapped=conf.getboolean('webserver', 'default_wrap'),
)
@expose('/dag_details')
@auth.has_access(
[
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG),
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG_RUN),
]
)
@provide_session
def dag_details(self, session=None):
"""Get Dag details."""
dag_id = request.args.get('dag_id')
dag = current_app.dag_bag.get_dag(dag_id)
title = "DAG Details"
root = request.args.get('root', '')
states = (
session.query(TaskInstance.state, sqla.func.count(TaskInstance.dag_id))
.filter(TaskInstance.dag_id == dag_id)
.group_by(TaskInstance.state)
.all()
)
active_runs = models.DagRun.find(dag_id=dag_id, state=State.RUNNING, external_trigger=False)
tags = session.query(models.DagTag).filter(models.DagTag.dag_id == dag_id).all()
return self.render_template(
'airflow/dag_details.html',
dag=dag,
title=title,
root=root,
states=states,
State=State,
active_runs=active_runs,
tags=tags,
)
@expose('/rendered-templates')
@auth.has_access(
[
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG),
(permissions.ACTION_CAN_READ, permissions.RESOURCE_TASK_INSTANCE),
]
)
@action_logging
def rendered_templates(self):
"""Get rendered Dag."""
dag_id = request.args.get('dag_id')
task_id = request.args.get('task_id')
execution_date = request.args.get('execution_date')
dttm = timezone.parse(execution_date)
form = DateTimeForm(data={'execution_date': dttm})
root = request.args.get('root', '')
logging.info("Retrieving rendered templates.")
dag = current_app.dag_bag.get_dag(dag_id)
task = copy.copy(dag.get_task(task_id))
ti = models.TaskInstance(task=task, execution_date=dttm)
try:
ti.get_rendered_template_fields()
except AirflowException as e: # pylint: disable=broad-except
msg = "Error rendering template: " + escape(e)
if e.__cause__: # pylint: disable=using-constant-test
msg += Markup("<br><br>OriginalError: ") + escape(e.__cause__)
flash(msg, "error")
except Exception as e: # pylint: disable=broad-except
flash("Error rendering template: " + str(e), "error")
title = "Rendered Template"
html_dict = {}
renderers = wwwutils.get_attr_renderer()
for template_field in task.template_fields:
content = getattr(task, template_field)
renderer = task.template_fields_renderers.get(template_field, template_field)
if renderer in renderers:
html_dict[template_field] = renderers[renderer](content)
else:
html_dict[template_field] = Markup("<pre><code>{}</pre></code>").format(
pformat(content)
) # noqa
return self.render_template(
'airflow/ti_code.html',
html_dict=html_dict,
dag=dag,
task_id=task_id,
execution_date=execution_date,
form=form,
root=root,
title=title,
)
@expose('/rendered-k8s')
@auth.has_access(
[
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG),