* add exclusion api, fixes#311
add new apis: `POST crawls/{crawl_id}/exclusion?regex=...` and `DELETE crawls/{crawl_id}/exclusion?regex=...` which will:
- create new config with add 'regex' as exclusion (deleting or making inactive previous config) OR remove as exclusion.
- update crawl to point to new config
- update statefulset to point to new config, causing crawler pods to restart
- filter out urls matching 'regex' from both queue and seen list (currently a bit slow) (when adding only)
- return 400 if exclusion already existing when adding, or doesn't exist when removing
- api reads redis list in reverse to match how exclusion queue is used
- regression fix: ensure correct signals are set to stop crawl (SIGUSER1 + SIGTERM)
- crawl stop: if crawl is still running after 60 seconds, allow signal to be resent
- regression fix: ensure crawling with profile is working in k8s
- only send signal if stopping, no need for canceling as pods/containers will be removed
- refactor stop/cancel handling to be unified in manager, separate in job
- when stopping / graceful shutdown, return false if sending signal fails
- return success=true in json response if and only if stop/cancel actually succeeds, return 'error' message in error, should fix#270
- allow canceling after stopping / if stopping fails
- ensure finished time is set in case of cancelation before crawl starts, should fix#273
* k8s: add tolerations for 'nodeType=crawling:NoSchedule' to allow scheduling crawling on designated nodes for crawler and profiles jobs and statefulsets
* add affinity for 'nodeType=crawling' on crawling and profile browser statefulsets
* refactor crawljob: combine crawl_updater logic into base crawl_job
* increment new 'crawlAttemptCount' counter crawlconfig when crawl is started, not necessarily finished, to avoid deleting configs that had attempted but not finished crawls.
* better external mongodb support: use MONGO_DB_URL to set custom url directly, otherwise build from username, password and mongo host
- use python-on-whale to use docker cli api directly, creating docker stack for each crawl or profile browser
- configure storages via storages.yaml secret
- add crawl_job, profile_job, splitting into base and k8s/swarm implementations
- split manager into base crawlmanager and k8s/swarm implementations
- swarm: load initial scale from db to avoid modifying fixed configs, in k8s, load from configmap
- swarm: support scheduled jobs via swarm-cronjob service
- remove docker dependencies (aiodocker, apscheduler, scheduling)
- swarm: when using local minio, expose via /data/ route in nginx via extra include (in k8s, include dir is empty and routing handled via ingress)
- k8s: cleanup minio chart: move init containers to minio.yaml
- swarm: stateful set implementation to be consistent with k8s scaling:
- don't use service replicas,
- create a unique service with '-N' appended and allocate unique volume for each replica
- allows crawl containers to be restarted w/o losing data
- add volume pruning background service, as volumes can be deleted only after service shuts down fully
- watch: fully simplify routing, route via replica index instead of ip for both k8s and swarm
- rename network btrix-cloud-net -> btrix-net to avoid conflict with compose network
- use statefulsets instead of deployments for mongo, redis, signer
- use k8s job + statefulset for running crawls
- use separate statefulset for crawl (scaled) and single-replica redis stateful set
- move crawl job update login to crawl_updater
- remove shared redis chart
package refactor:
- move to shared code to 'btrixcloud'
- move k8s to 'btrixcloud.k8s'
- move docker to 'btrixcloud.docker'
