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fix: lower bundle cache timeout from 47hrs to 50mins (#26863)

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S3 URLs served by Blockstore have a max TTL of
1hr, since the temporary credentials the Blockstore
uses to sign the URLs themselves have a TTL of
1hr. Thus, we must cache Blockstore bundles for
less than 1hr.

TNL-7771
This commit is contained in:
Kyle McCormick
2021-03-08 08:47:30 -05:00
committed by GitHub
parent 8168a3a322
commit f54e3752fa
2 changed files with 18 additions and 4 deletions
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11
cms/envs/common.py
View File

@@ -2275,8 +2275,15 @@ BLOCKSTORE_API_URL = 'http://localhost:18250/api/v1/'
# in the blockstore-based XBlock runtime
XBLOCK_RUNTIME_V2_EPHEMERAL_DATA_CACHE = 'default'
# Blockstore data could contain S3 links, so this should be lower than Blockstore's AWS_QUERYSTRING_EXPIRE
BLOCKSTORE_BUNDLE_CACHE_TIMEOUT = 169200
# .. setting_name: BLOCKSTORE_BUNDLE_CACHE_TIMEOUT
# .. setting_default: 3000
# .. setting_description: Maximum time-to-live of cached Bundles fetched from
# Blockstore, in seconds. When the values returned from Blockstore have
# TTLs of their own (such as signed S3 URLs), the maximum TTL of this cache
# must be lower than the minimum TTL of those values.
# We use a default of 3000s (50mins) because temporary URLs are often
# configured to expire after one hour.
BLOCKSTORE_BUNDLE_CACHE_TIMEOUT = 3000
###################### LEARNER PORTAL ################################
LEARNER_PORTAL_URL_ROOT = 'https://learner-portal-localhost:18000'

11
lms/envs/common.py
View File

@@ -4612,8 +4612,15 @@ BLOCKSTORE_API_URL = 'http://localhost:18250/api/v1/'
# .. setting_description: The django cache key of the cache to use for storing anonymous user state for XBlocks.
XBLOCK_RUNTIME_V2_EPHEMERAL_DATA_CACHE = 'default'
# Blockstore data could contain S3 links, so this should be lower than Blockstore's AWS_QUERYSTRING_EXPIRE
BLOCKSTORE_BUNDLE_CACHE_TIMEOUT = 169200
# .. setting_name: BLOCKSTORE_BUNDLE_CACHE_TIMEOUT
# .. setting_default: 3000
# .. setting_description: Maximum time-to-live of cached Bundles fetched from
# Blockstore, in seconds. When the values returned from Blockstore have
# TTLs of their own (such as signed S3 URLs), the maximum TTL of this cache
# must be lower than the minimum TTL of those values.
# We use a default of 3000s (50mins) because temporary URLs are often
# configured to expire after one hour.
BLOCKSTORE_BUNDLE_CACHE_TIMEOUT = 3000
######################### MICROSITE ###############################
MICROSITE_ROOT_DIR = '/edx/app/edxapp/edx-microsite'