Allow custom auto-resize crawler volume ratio adjustable (#2076)

Make the avail / used storage ratio (for crawler volumes) adjustable.
Disable auto-resize if set to 0.
Follow-up to #2023

backend/btrixcloud/operator/crawls.py

@@ -76,9 +76,6 @@
 # set memory limit to this much of request for extra padding
 MEM_LIMIT_PADDING = 1.2
 
-# ensure available storage is at least this much times used storage
-AVAIL_STORAGE_RATIO = 2.5
-
 
 # pylint: disable=too-many-public-methods, too-many-locals, too-many-branches, too-many-statements
 # pylint: disable=invalid-name, too-many-lines, too-many-return-statements
@@ -93,6 +90,8 @@ class CrawlOperator(BaseOperator):
     fast_retry_secs: int
     log_failed_crawl_lines: int
 
+    min_avail_storage_ratio: float
+
     def __init__(self, *args):
         super().__init__(*args)
 
@@ -104,6 +103,11 @@ def __init__(self, *args):
 
         self.log_failed_crawl_lines = int(os.environ.get("LOG_FAILED_CRAWL_LINES") or 0)
 
+        # ensure available storage is at least this much times used storage
+        self.min_avail_storage_ratio = float(
+            os.environ.get("CRAWLER_MIN_AVAIL_STORAGE_RATIO") or 0
+        )
+
     def init_routes(self, app):
         """init routes for this operator"""
 
@@ -1336,12 +1340,15 @@ async def update_crawl_state(
 
                 if (
                     status.state == "running"
+                    and self.min_avail_storage_ratio
                     and pod_info.allocated.storage
-                    and pod_info.used.storage * AVAIL_STORAGE_RATIO
+                    and pod_info.used.storage * self.min_avail_storage_ratio
                     > pod_info.allocated.storage
                 ):
                     new_storage = math.ceil(
-                        pod_info.used.storage * AVAIL_STORAGE_RATIO / 1_000_000_000
+                        pod_info.used.storage
+                        * self.min_avail_storage_ratio
+                        / 1_000_000_000
                     )
                     pod_info.newStorage = f"{new_storage}Gi"
                     print(

chart/templates/configmap.yaml

@@ -60,6 +60,8 @@ data:
 
   MAX_CRAWLER_MEMORY: "{{ .Values.max_crawler_memory }}"
 
+  CRAWLER_MIN_AVAIL_STORAGE_RATIO: "{{ .Values.crawler_min_avail_storage_ratio }}"
+
   ENABLE_AUTO_RESIZE_CRAWLERS: "{{ .Values.enable_auto_resize_crawlers }}"
 
   BILLING_ENABLED: "{{ .Values.billing_enabled }}"

chart/values.yaml

@@ -75,7 +75,7 @@ allow_dupe_invites: "0"
 invite_expire_seconds: 604800
 
 # base url for replayweb.page
-rwp_base_url: "https://cdn.jsdelivr.net/npm/replaywebpage@1.8.15/"
+rwp_base_url: "https://cdn.jsdelivr.net/npm/replaywebpage@2.1.4/"
 
 superuser:
   # set this to enable a superuser admin
@@ -288,12 +288,19 @@ enable_auto_resize_crawlers: false
 # the workdir is used to store the browser profile data and other temporary files
 # profile_browser_workdir_size: 4Gi
 
+
 # Other Crawler Settings
 # ----------------------
 
 # minimum size allocated to each crawler
 # should be at least double crawl session size to ensure space for WACZ and browser profile data
-crawler_storage: "26Gi"
+crawler_storage: "25Gi"
+
+
+# if set, will ensure 'crawler_storage' is at least this times used storage
+# eg. if crawler session reaches 10Gb, and this value is 2.5, will attempt
+# to resize to at least 25Gb.
+crawler_min_avail_storage_ratio: 2.5
 
 # max size at which crawler will commit current crawl session
 crawler_session_size_limit_bytes: "10000000000"