732 lines
24 KiB
Python
732 lines
24 KiB
Python
""" btrixjob operator (working for metacontroller) """
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import asyncio
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import traceback
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from typing import Optional
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from datetime import datetime
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import json
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import uuid
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import yaml
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import humanize
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from pydantic import BaseModel
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from redis import asyncio as aioredis
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from .utils import (
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from_k8s_date,
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to_k8s_date,
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dt_now,
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get_redis_crawl_stats,
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)
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from .k8sapi import K8sAPI
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from .db import init_db
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from .orgs import inc_org_stats, get_max_concurrent_crawls
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from .colls import add_successful_crawl_to_collections
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from .crawlconfigs import stats_recompute_last
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from .crawls import (
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CrawlFile,
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CrawlCompleteIn,
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add_crawl_file,
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update_crawl_state_if_allowed,
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get_crawl_state,
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add_crawl_errors,
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NON_RUNNING_STATES,
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SUCCESSFUL_STATES,
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)
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STS = "StatefulSet.apps/v1"
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CMAP = "ConfigMap.v1"
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PVC = "PersistentVolumeClaim.v1"
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POD = "Pod.v1"
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CJS = "CrawlJob.btrix.cloud/v1"
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DEFAULT_TTL = 30
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# ============================================================================
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class DeleteCrawlException(Exception):
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"""throw to force deletion of crawl objects"""
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# ============================================================================
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class MCBaseRequest(BaseModel):
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"""base metacontroller model, used for customize hook"""
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parent: dict
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controller: dict
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# ============================================================================
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class MCSyncData(MCBaseRequest):
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"""sync / finalize metacontroller model"""
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children: dict
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related: dict
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finalizing: bool = False
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# ============================================================================
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class CrawlSpec(BaseModel):
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"""spec from k8s CrawlJob object"""
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id: str
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cid: uuid.UUID
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oid: uuid.UUID
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scale: int
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storage_path: str
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storage_name: str
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started: str
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stopping: bool = False
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expire_time: Optional[datetime] = None
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# ============================================================================
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class CrawlStatus(BaseModel):
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"""status from k8s CrawlJob object"""
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state: str = "starting"
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pagesFound: int = 0
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pagesDone: int = 0
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size: str = ""
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scale: int = 1
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filesAdded: int = 0
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filesAddedSize: int = 0
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finished: Optional[str] = None
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stopping: bool = False
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# forceRestart: Optional[str]
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# ============================================================================
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# pylint: disable=too-many-statements
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class BtrixOperator(K8sAPI):
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"""BtrixOperator Handler"""
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# pylint: disable=too-many-instance-attributes,too-many-locals
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def __init__(self):
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super().__init__()
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self.config_file = "/config/config.yaml"
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_, mdb = init_db()
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self.collections = mdb["collections"]
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self.crawls = mdb["crawls"]
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self.crawl_configs = mdb["crawl_configs"]
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self.orgs = mdb["organizations"]
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self.done_key = "crawls-done"
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with open(self.config_file, encoding="utf-8") as fh_config:
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self.shared_params = yaml.safe_load(fh_config)
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async def sync_profile_browsers(self, data: MCSyncData):
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"""sync profile browsers"""
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spec = data.parent.get("spec", {})
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expire_time = from_k8s_date(spec.get("expireTime"))
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browserid = spec.get("id")
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if dt_now() >= expire_time:
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asyncio.create_task(self.delete_profile_browser(browserid))
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return {"status": {}, "children": []}
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params = {}
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params.update(self.shared_params)
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params["id"] = browserid
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params["userid"] = spec.get("userid", "")
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params["storage_name"] = spec.get("storageName", "")
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params["storage_path"] = spec.get("storagePath", "")
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params["profile_filename"] = spec.get("profileFilename", "")
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params["url"] = spec.get("startUrl", "about:blank")
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params["vnc_password"] = spec.get("vncPassword")
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children = self.load_from_yaml("profilebrowser.yaml", params)
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return {"status": {}, "children": children}
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async def sync_crawls(self, data: MCSyncData):
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"""sync crawls"""
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status = CrawlStatus(**data.parent.get("status", {}))
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spec = data.parent.get("spec", {})
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crawl_id = spec["id"]
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cid = spec["cid"]
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oid = spec["oid"]
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scale = spec.get("scale", 1)
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status.scale = scale
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redis_url = self.get_redis_url(crawl_id)
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# if finalizing, crawl is being deleted
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if data.finalizing:
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# if not yet finished, assume it was canceled, mark as such
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print(f"Finalizing crawl {crawl_id}, finished {status.finished}")
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if not status.finished:
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finalize = await self.cancel_crawl(
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redis_url, crawl_id, cid, status, "canceled"
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)
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else:
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finalize = True
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return await self.finalize_crawl(crawl_id, status, data.related, finalize)
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if status.finished:
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return await self.handle_finished_delete_if_needed(crawl_id, status, spec)
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try:
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configmap = data.related[CMAP][f"crawl-config-{cid}"]["data"]
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# pylint: disable=bare-except, broad-except
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except:
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# fail crawl if config somehow missing, shouldn't generally happen
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await self.cancel_crawl(redis_url, crawl_id, cid, status, "failed")
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return self._done_response(status)
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crawl = CrawlSpec(
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id=crawl_id,
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cid=cid,
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oid=oid,
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storage_name=configmap["STORAGE_NAME"],
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storage_path=configmap["STORE_PATH"],
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scale=scale,
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started=data.parent["metadata"]["creationTimestamp"],
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stopping=spec.get("stopping", False),
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expire_time=from_k8s_date(spec.get("expireTime")),
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)
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if status.state in ("starting", "waiting_org_limit"):
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if not await self.can_start_new(crawl, data, status):
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return self._done_response(status)
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await self.set_state(
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"starting", status, crawl.id, allowed_from=["waiting_org_limit"]
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)
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crawl_sts = f"crawl-{crawl_id}"
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redis_sts = f"redis-{crawl_id}"
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has_crawl_children = crawl_sts in data.children[STS]
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if has_crawl_children:
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pods = data.related[POD]
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status = await self.sync_crawl_state(redis_url, crawl, status, pods)
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if status.finished:
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return await self.handle_finished_delete_if_needed(
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crawl_id, status, spec
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)
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params = {}
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params.update(self.shared_params)
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params["id"] = crawl_id
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params["cid"] = cid
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params["userid"] = spec.get("userid", "")
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params["storage_name"] = configmap["STORAGE_NAME"]
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params["store_path"] = configmap["STORE_PATH"]
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params["store_filename"] = configmap["STORE_FILENAME"]
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params["profile_filename"] = configmap["PROFILE_FILENAME"]
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params["scale"] = spec.get("scale", 1)
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params["force_restart"] = spec.get("forceRestart")
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params["redis_url"] = redis_url
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children = self.load_from_yaml("crawler.yaml", params)
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children.extend(self.load_from_yaml("redis.yaml", params))
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# to minimize merging, just patch in volumeClaimTemplates from actual children
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# as they may get additional settings that cause more frequent updates
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if has_crawl_children:
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children[0]["spec"]["volumeClaimTemplates"] = data.children[STS][crawl_sts][
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"spec"
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]["volumeClaimTemplates"]
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has_redis_children = redis_sts in data.children[STS]
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if has_redis_children:
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children[2]["spec"]["volumeClaimTemplates"] = data.children[STS][redis_sts][
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"spec"
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]["volumeClaimTemplates"]
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return {"status": status.dict(exclude_none=True), "children": children}
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async def set_state(self, state, status, crawl_id, allowed_from, **kwargs):
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"""set status state and update db, if changed
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if allowed_from passed in, can only transition from allowed_from state,
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otherwise get current state from db and return
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the following state transitions are supported:
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from starting to org concurrent crawl limit and back:
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- starting -> waiting_org_capacity -> starting
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from starting to running:
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- starting -> running
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from running to complete or partial_complete:
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- running -> complete
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- running -> partial_complete
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from starting or running to waiting for capacity (pods pending) and back:
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- starting -> waiting_capacity
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- running -> waiting_capacity
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- waiting_capacity -> running
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from any state to canceled or failed:
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- <any> -> canceled
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- <any> -> failed
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"""
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if not allowed_from or status.state in allowed_from:
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res = await update_crawl_state_if_allowed(
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self.crawls, crawl_id, state=state, allowed_from=allowed_from, **kwargs
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)
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if res:
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print(f"Setting state: {status.state} -> {state}, {crawl_id}")
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status.state = state
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return True
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# get actual crawl state
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new_state, finished = await get_crawl_state(self.crawls, crawl_id)
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if new_state:
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status.state = state
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if finished:
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status.finished = to_k8s_date(finished)
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if status.state != state:
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print(
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f"Not setting state: {status.state} -> {state}, {crawl_id} not allowed"
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)
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return False
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def load_from_yaml(self, filename, params):
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"""load and parse k8s template from yaml file"""
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return list(
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yaml.safe_load_all(self.templates.env.get_template(filename).render(params))
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)
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def get_related(self, data: MCBaseRequest):
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"""return configmap related to crawl"""
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spec = data.parent.get("spec", {})
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cid = spec["cid"]
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crawl_id = spec["id"]
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oid = spec.get("oid")
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return {
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"relatedResources": [
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{
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"apiVersion": "v1",
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"resource": "configmaps",
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"labelSelector": {"matchLabels": {"btrix.crawlconfig": cid}},
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},
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{
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"apiVersion": "v1",
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"resource": "persistentvolumeclaims",
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"labelSelector": {"matchLabels": {"crawl": crawl_id}},
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},
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{
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"apiVersion": "v1",
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"resource": "pods",
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"labelSelector": {
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"matchLabels": {"crawl": crawl_id, "role": "crawler"}
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},
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},
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{
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"apiVersion": "btrix.cloud/v1",
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"resource": "crawljobs",
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"labelSelector": {"matchLabels": {"oid": oid}},
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},
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]
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}
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async def can_start_new(self, crawl: CrawlSpec, data: MCSyncData, status):
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"""return true if crawl can start, otherwise set crawl to 'queued' state
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until more crawls for org finish"""
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max_crawls = await get_max_concurrent_crawls(self.orgs, crawl.oid)
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if not max_crawls:
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return True
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if len(data.related[CJS]) <= max_crawls:
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return True
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name = data.parent.get("metadata").get("name")
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# def metadata_key(val):
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# return val.get("metadata").get("creationTimestamp")
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# all_crawljobs = sorted(data.related[CJS].values(), key=metadata_key)
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# print(list(data.related[CJS].keys()))
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i = 0
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for crawl_sorted in data.related[CJS].values():
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if crawl_sorted.get("status", {}).get("state") in NON_RUNNING_STATES:
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continue
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# print(i, crawl_sorted.get("metadata").get("name"))
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if crawl_sorted.get("metadata").get("name") == name:
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# print("found: ", name, "index", i)
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if i < max_crawls:
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return True
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break
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i += 1
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await self.set_state(
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"waiting_org_limit", status, crawl.id, allowed_from=["starting"]
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)
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return False
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async def handle_finished_delete_if_needed(self, crawl_id, status, spec):
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"""return status for finished job (no children)
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also check if deletion is necessary
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"""
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ttl = spec.get("ttlSecondsAfterFinished", DEFAULT_TTL)
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finished = from_k8s_date(status.finished)
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if (dt_now() - finished).total_seconds() > ttl > 0:
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print("Job expired, deleting: " + crawl_id)
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asyncio.create_task(self.delete_crawl_job(crawl_id))
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return self._done_response(status)
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async def delete_pvc(self, crawl_id):
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"""delete all pvcs for crawl"""
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# until delete policy is supported in StatefulSet
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# now, delete pvcs explicitly
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# (don't want to make them children as already owned by sts)
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try:
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await self.core_api.delete_collection_namespaced_persistent_volume_claim(
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namespace=self.namespace, label_selector=f"crawl={crawl_id}"
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)
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# pylint: disable=bare-except, broad-except
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except Exception as exc:
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print("PVC Delete failed", exc, flush=True)
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# pylint: disable=too-many-arguments
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async def cancel_crawl(self, redis_url, crawl_id, cid, status, state):
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"""immediately cancel crawl with specified state
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return true if db mark_finished update succeeds"""
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try:
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redis = await self._get_redis(redis_url)
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await self.mark_finished(redis, crawl_id, uuid.UUID(cid), status, state)
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return True
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# pylint: disable=bare-except
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except:
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return False
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def _done_response(self, status, finalized=False):
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"""done response for removing crawl"""
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return {
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"status": status.dict(exclude_none=True),
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"children": [],
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"finalized": finalized,
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}
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async def finalize_crawl(self, crawl_id, status, related, finalized=True):
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"""ensure crawl id ready for deletion
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return with finalized state"""
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pvcs = list(related[PVC].keys())
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if pvcs:
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print(f"Deleting PVCs for {crawl_id}", pvcs)
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asyncio.create_task(self.delete_pvc(crawl_id))
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finalized = False
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return self._done_response(status, finalized)
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async def _get_redis(self, redis_url):
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"""init redis, ensure connectivity"""
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redis = None
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try:
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redis = await aioredis.from_url(
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redis_url, encoding="utf-8", decode_responses=True
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)
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# test connection
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await redis.ping()
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return redis
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# pylint: disable=bare-except
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except:
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return None
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async def sync_crawl_state(self, redis_url, crawl, status, pods):
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"""sync crawl state for running crawl"""
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redis = await self._get_redis(redis_url)
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if not redis:
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return status
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# if not prev_start_time:
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# await redis.set("start_time", str(self.started))
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try:
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file_done = await redis.lpop(self.done_key)
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while file_done:
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msg = json.loads(file_done)
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# add completed file
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if msg.get("filename"):
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await self.add_file_to_crawl(msg, crawl, redis)
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await redis.incr("filesAdded")
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# get next file done
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file_done = await redis.lpop(self.done_key)
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# ensure filesAdded and filesAddedSize always set
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status.filesAdded = int(await redis.get("filesAdded") or 0)
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status.filesAddedSize = int(await redis.get("filesAddedSize") or 0)
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# update stats and get status
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return await self.update_crawl_state(redis, crawl, status, pods)
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# pylint: disable=broad-except
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except Exception as exc:
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traceback.print_exc()
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print(f"Crawl get failed: {exc}, will try again")
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return status
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async def check_if_pods_running(self, pods):
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"""check if at least one crawler pod has started"""
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try:
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for pod in pods.values():
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if pod["status"]["phase"] == "Running":
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return True
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# pylint: disable=bare-except
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except:
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# assume no valid pod found
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pass
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return False
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async def add_file_to_crawl(self, cc_data, crawl, redis):
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"""Handle finished CrawlFile to db"""
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filecomplete = CrawlCompleteIn(**cc_data)
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inx = None
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filename = None
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if crawl.storage_path:
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inx = filecomplete.filename.index(crawl.storage_path)
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filename = filecomplete.filename[inx:] if inx > 0 else filecomplete.filename
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def_storage_name = crawl.storage_name if inx else None
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crawl_file = CrawlFile(
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def_storage_name=def_storage_name,
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filename=filename or filecomplete.filename,
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size=filecomplete.size,
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hash=filecomplete.hash,
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)
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await redis.incr("filesAddedSize", filecomplete.size)
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await add_crawl_file(self.crawls, crawl.id, crawl_file, filecomplete.size)
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return True
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# pylint: disable=too-many-branches
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async def update_crawl_state(self, redis, crawl, status, pods):
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"""update crawl state and check if crawl is now done"""
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results = await redis.hvals(f"{crawl.id}:status")
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stats = await get_redis_crawl_stats(redis, crawl.id)
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|
|
|
# check crawl expiry
|
|
if crawl.expire_time and datetime.utcnow() > crawl.expire_time:
|
|
crawl.stopping = True
|
|
print(
|
|
"Job duration expired at {crawl.expire_time}, "
|
|
+ "gracefully stopping crawl"
|
|
)
|
|
|
|
if crawl.stopping:
|
|
print("Graceful Stop")
|
|
await redis.set(f"{crawl.id}:stopping", "1")
|
|
# backwards compatibility with older crawler
|
|
await redis.set("crawl-stop", "1")
|
|
|
|
# check if at least one pod started running
|
|
# otherwise, mark as 'waiting' and return
|
|
if not await self.check_if_pods_running(pods):
|
|
await self.set_state(
|
|
"waiting_capacity",
|
|
status,
|
|
crawl.id,
|
|
allowed_from=["starting", "running"],
|
|
)
|
|
|
|
return status
|
|
|
|
# set state to running (if not already)
|
|
await self.set_state(
|
|
"running", status, crawl.id, allowed_from=["starting", "waiting_capacity"]
|
|
)
|
|
|
|
# update status
|
|
status.pagesDone = stats["done"]
|
|
status.pagesFound = stats["found"]
|
|
if stats["size"] is not None:
|
|
status.size = humanize.naturalsize(stats["size"])
|
|
|
|
# check if done / failed
|
|
done = 0
|
|
failed = 0
|
|
for res in results:
|
|
if res == "done":
|
|
done += 1
|
|
elif res == "failed":
|
|
failed += 1
|
|
|
|
# check if all crawlers are done
|
|
if done >= crawl.scale:
|
|
# check if one-page crawls actually succeeded
|
|
# if only one page found, and no files, assume failed
|
|
if status.pagesFound == 1 and not status.filesAdded:
|
|
return await self.mark_finished(
|
|
redis, crawl.id, crawl.cid, status, state="failed"
|
|
)
|
|
|
|
completed = status.pagesDone and status.pagesDone >= status.pagesFound
|
|
|
|
state = "complete" if completed else "partial_complete"
|
|
|
|
status = await self.mark_finished(
|
|
redis, crawl.id, crawl.cid, status, state, crawl, stats
|
|
)
|
|
|
|
# check if all crawlers failed
|
|
if failed >= crawl.scale:
|
|
# if stopping, and no pages finished, mark as canceled
|
|
if crawl.stopping and not status.pagesDone:
|
|
state = "canceled"
|
|
else:
|
|
state = "failed"
|
|
|
|
status = await self.mark_finished(
|
|
redis, crawl.id, crawl.cid, status, state=state
|
|
)
|
|
|
|
return status
|
|
|
|
# pylint: disable=too-many-arguments
|
|
async def mark_finished(
|
|
self, redis, crawl_id, cid, status, state, crawl=None, stats=None
|
|
):
|
|
"""mark crawl as finished, set finished timestamp and final state"""
|
|
|
|
finished = dt_now()
|
|
|
|
kwargs = {"finished": finished}
|
|
if stats:
|
|
kwargs["stats"] = stats
|
|
|
|
if state in SUCCESSFUL_STATES:
|
|
allowed_from = ["running"]
|
|
else:
|
|
allowed_from = []
|
|
|
|
# if set_state returns false, already set to same status, return
|
|
if not await self.set_state(
|
|
state, status, crawl_id, allowed_from=allowed_from, **kwargs
|
|
):
|
|
print("already finished, ignoring mark_finished")
|
|
if not status.finished:
|
|
status.finished = to_k8s_date(finished)
|
|
|
|
return status
|
|
|
|
status.finished = to_k8s_date(finished)
|
|
|
|
if crawl and state in SUCCESSFUL_STATES:
|
|
await self.inc_crawl_complete_stats(crawl, finished)
|
|
|
|
asyncio.create_task(
|
|
self.do_crawl_finished_tasks(
|
|
redis, crawl_id, cid, status.filesAddedSize, state
|
|
)
|
|
)
|
|
|
|
return status
|
|
|
|
# pylint: disable=too-many-arguments
|
|
async def do_crawl_finished_tasks(
|
|
self, redis, crawl_id, cid, files_added_size, state
|
|
):
|
|
"""Run tasks after crawl completes in asyncio.task coroutine."""
|
|
await stats_recompute_last(
|
|
self.crawl_configs, self.crawls, cid, files_added_size, 1
|
|
)
|
|
|
|
if redis:
|
|
await self.add_crawl_errors_to_db(redis, crawl_id)
|
|
|
|
if state in SUCCESSFUL_STATES:
|
|
await add_successful_crawl_to_collections(
|
|
self.crawls, self.crawl_configs, self.collections, crawl_id, cid
|
|
)
|
|
|
|
async def inc_crawl_complete_stats(self, crawl, finished):
|
|
"""Increment Crawl Stats"""
|
|
|
|
started = from_k8s_date(crawl.started)
|
|
|
|
duration = int((finished - started).total_seconds())
|
|
|
|
print(f"Duration: {duration}", flush=True)
|
|
|
|
await inc_org_stats(self.orgs, crawl.oid, duration)
|
|
|
|
async def add_crawl_errors_to_db(self, redis, crawl_id, inc=100):
|
|
"""Pull crawl errors from redis and write to mongo db"""
|
|
index = 0
|
|
try:
|
|
# ensure this only runs once
|
|
if not await redis.setnx("errors-exported", "1"):
|
|
return
|
|
|
|
while True:
|
|
skip = index * inc
|
|
upper_bound = skip + inc - 1
|
|
errors = await redis.lrange(f"{crawl_id}:e", skip, upper_bound)
|
|
if not errors:
|
|
break
|
|
|
|
await add_crawl_errors(self.crawls, crawl_id, errors)
|
|
|
|
if len(errors) < inc:
|
|
# If we have fewer than inc errors, we can assume this is the
|
|
# last page of data to add.
|
|
break
|
|
index += 1
|
|
# likely redis has already been deleted, so nothing to do
|
|
# pylint: disable=bare-except
|
|
except:
|
|
return
|
|
|
|
|
|
# ============================================================================
|
|
def init_operator_webhook(app):
|
|
"""regsiters webhook handlers for metacontroller"""
|
|
|
|
oper = BtrixOperator()
|
|
|
|
@app.post("/op/crawls/sync")
|
|
async def mc_sync_crawls(data: MCSyncData):
|
|
return await oper.sync_crawls(data)
|
|
|
|
# reuse sync path, but distinct endpoint for better logging
|
|
@app.post("/op/crawls/finalize")
|
|
async def mc_sync_finalize(data: MCSyncData):
|
|
return await oper.sync_crawls(data)
|
|
|
|
@app.post("/op/crawls/customize")
|
|
async def mc_related(data: MCBaseRequest):
|
|
return oper.get_related(data)
|
|
|
|
@app.post("/op/profilebrowsers/sync")
|
|
async def mc_sync_profile_browsers(data: MCSyncData):
|
|
return await oper.sync_profile_browsers(data)
|
|
|
|
@app.get("/healthz", include_in_schema=False)
|
|
async def healthz():
|
|
return {}
|