0653657637
This PR addresses a possible failure when Redis pod was inaccessible from Crawler pod. - Ensure crawl is set to 'waiting_for_capacity' if either no crawler pods are available or no redis pod. previously, missing/inaccessible redis would not result in 'waiting_for_capacity' if crawler pods are available - Rework logic: if no crawler and redis after >60 seconds, shutdown redis. if crawler and no redis, init (or reinit) redis - track 'lastUpdatedTime' in db when incrementing exec time to avoid double counting if lastUpdatedTime has not changed, eg. if operator sync fails. - add redis timeout of 20 seconds to avoid timing out operator responses if redis conn takes too long, assume unavailable
292 lines
9.7 KiB
Python
292 lines
9.7 KiB
Python
""" K8S API Access """
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import os
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import traceback
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import yaml
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from kubernetes_asyncio import client, config
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from kubernetes_asyncio.stream import WsApiClient
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from kubernetes_asyncio.client.api_client import ApiClient
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from kubernetes_asyncio.client.api import custom_objects_api
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from kubernetes_asyncio.utils import create_from_dict
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from kubernetes_asyncio.client.exceptions import ApiException
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from redis import asyncio as aioredis
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from fastapi import HTTPException
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from fastapi.templating import Jinja2Templates
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from .utils import get_templates_dir, dt_now
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# ============================================================================
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# pylint: disable=too-many-instance-attributes
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class K8sAPI:
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"""K8S API accessors"""
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def __init__(self):
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super().__init__()
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self.namespace = os.environ.get("CRAWLER_NAMESPACE") or "crawlers"
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self.custom_resources = {}
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self.templates = Jinja2Templates(directory=get_templates_dir())
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config.load_incluster_config()
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self.client = client
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self.api_client = ApiClient()
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self.core_api = client.CoreV1Api(self.api_client)
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self.core_api_ws = client.CoreV1Api(api_client=WsApiClient())
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self.batch_api = client.BatchV1Api(self.api_client)
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self.apps_api = client.AppsV1Api(self.api_client)
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# try separate api client to avoid content-type issues
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self.custom_api = custom_objects_api.CustomObjectsApi(self.api_client)
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# custom resource's client API
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self.add_custom_resource("CrawlJob", "crawljobs")
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self.add_custom_resource("ProfileJob", "profilejobs")
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def add_custom_resource(self, name, plural):
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"""add custom resource"""
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self.custom_resources[name] = plural
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def get_custom_api(self, kind):
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"""return custom API"""
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return self.custom_resources[kind] if kind in self.custom_resources else None
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def get_redis_url(self, crawl_id):
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"""get redis url for crawl id"""
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redis_url = (
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f"redis://redis-{crawl_id}.redis.{self.namespace}.svc.cluster.local/0"
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)
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return redis_url
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async def get_redis_client(self, redis_url):
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"""return redis client with correct params for one-time use"""
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return aioredis.from_url(
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redis_url,
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decode_responses=True,
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auto_close_connection_pool=True,
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socket_timeout=20,
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)
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# pylint: disable=too-many-arguments, too-many-locals
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def new_crawl_job_yaml(
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self,
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cid,
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userid,
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oid,
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storage,
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crawler_channel,
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scale=1,
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crawl_timeout=0,
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max_crawl_size=0,
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manual=True,
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crawl_id=None,
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):
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"""load job template from yaml"""
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if not crawl_id:
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ts_now = dt_now().strftime("%Y%m%d%H%M%S")
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prefix = "manual" if manual else "sched"
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crawl_id = f"{prefix}-{ts_now}-{cid[:12]}"
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params = {
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"id": crawl_id,
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"cid": cid,
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"oid": oid,
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"userid": userid,
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"scale": scale,
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"timeout": crawl_timeout,
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"max_crawl_size": max_crawl_size or 0,
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"storage_name": str(storage),
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"manual": "1" if manual else "0",
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"crawler_channel": crawler_channel,
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}
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data = self.templates.env.get_template("crawl_job.yaml").render(params)
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return crawl_id, data
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async def new_crawl_job(self, *args, **kwargs) -> str:
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"""load and init crawl job via k8s api"""
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crawl_id, data = self.new_crawl_job_yaml(*args, **kwargs)
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# create job directly
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await self.create_from_yaml(data)
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return crawl_id
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async def create_from_yaml(self, doc, namespace=None):
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"""init k8s objects from yaml"""
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yml_document_all = yaml.safe_load_all(doc)
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k8s_objects = []
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for yml_document in yml_document_all:
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custom = self.custom_resources.get(yml_document["kind"])
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if custom is not None:
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created = await self.create_custom_from_dict(
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custom, yml_document, namespace
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)
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else:
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created = await create_from_dict(
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self.api_client,
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yml_document,
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verbose=False,
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namespace=namespace or self.namespace,
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)
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k8s_objects.append(created)
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return k8s_objects
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async def create_custom_from_dict(self, custom, doc, namespace):
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"""create custom from dict"""
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apiver = doc["apiVersion"].split("/")
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created = await self.custom_api.create_namespaced_custom_object(
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group=apiver[0],
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version=apiver[1],
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plural=custom,
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body=doc,
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namespace=namespace or self.namespace,
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)
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return created
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async def has_storage_secret(self, storage_secret) -> bool:
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"""Check if storage is valid by trying to get the storage secret
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Will throw if not valid, otherwise return True"""
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try:
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await self.core_api.read_namespaced_secret(
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storage_secret,
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namespace=self.namespace,
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)
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return True
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# pylint: disable=broad-except
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except Exception:
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# pylint: disable=broad-exception-raised,raise-missing-from
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raise HTTPException(
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status_code=400, detail="invalid_config_missing_storage_secret"
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)
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async def delete_crawl_job(self, crawl_id):
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"""delete custom crawljob object"""
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try:
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await self.custom_api.delete_namespaced_custom_object(
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group="btrix.cloud",
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version="v1",
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namespace=self.namespace,
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plural="crawljobs",
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name=f"crawljob-{crawl_id}",
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grace_period_seconds=0,
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# delete as background to allow operator to do proper cleanup
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propagation_policy="Background",
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)
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return {"success": True}
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except ApiException as api_exc:
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return {"error": str(api_exc.reason)}
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async def delete_profile_browser(self, browserid):
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"""delete custom crawljob object"""
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try:
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await self.custom_api.delete_namespaced_custom_object(
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group="btrix.cloud",
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version="v1",
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namespace=self.namespace,
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plural="profilejobs",
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name=f"profilejob-{browserid}",
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grace_period_seconds=0,
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propagation_policy="Background",
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)
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return True
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except ApiException:
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return False
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async def get_profile_browser(self, browserid):
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"""get profile browser"""
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return await self.custom_api.get_namespaced_custom_object(
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group="btrix.cloud",
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version="v1",
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namespace=self.namespace,
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plural="profilejobs",
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name=f"profilejob-{browserid}",
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)
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async def _patch_job(self, crawl_id, body, pluraltype="crawljobs") -> dict:
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content_type = self.api_client.default_headers.get("Content-Type")
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try:
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self.api_client.set_default_header(
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"Content-Type", "application/merge-patch+json"
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)
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await self.custom_api.patch_namespaced_custom_object(
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group="btrix.cloud",
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version="v1",
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namespace=self.namespace,
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plural=pluraltype,
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name=f"{pluraltype[:-1]}-{crawl_id}",
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body={"spec": body},
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)
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return {"success": True}
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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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return {"error": str(exc)}
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finally:
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if content_type:
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self.api_client.set_default_header("Content-Type", content_type)
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else:
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del self.api_client.default_headers["Content-Type"]
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async def print_pod_logs(self, pod_names, lines=100):
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"""print pod logs"""
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for pod in pod_names:
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print(f"============== LOGS FOR POD: {pod} ==============")
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try:
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resp = await self.core_api.read_namespaced_pod_log(
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pod, self.namespace, tail_lines=lines
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)
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print(resp)
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# pylint: disable=bare-except
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except:
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print("Logs Not Found")
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async def is_pod_metrics_available(self) -> bool:
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"""return true/false if metrics server api is available by
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attempting list operation. if operation succeeds, then
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metrics are available, otherwise not available
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"""
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try:
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await self.custom_api.list_namespaced_custom_object(
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group="metrics.k8s.io",
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version="v1beta1",
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namespace=self.namespace,
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plural="pods",
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limit=1,
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)
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return True
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# pylint: disable=broad-exception-caught
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except Exception as exc:
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print(exc)
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return False
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async def has_custom_jobs_with_label(self, plural, label) -> bool:
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"""return true/false if any crawljobs or profilejobs
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match given label"""
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try:
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await self.custom_api.list_namespaced_custom_object(
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group="btrix.cloud",
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version="v1",
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namespace=self.namespace,
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plural=plural,
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label_selector=label,
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limit=1,
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)
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return True
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# pylint: disable=broad-exception-caught
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except Exception:
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return False
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