fix(vault): secret is temporarily empty after changed vault config #14209
+55
−5
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
When vault config is changed, in the worker event we first flush the LRU cache, then start to update the secrets from vault provider. There’s a period of time in between that the cache is empty. The `kong.vault.update()` function only lookups cache and will update the secret to an empty string when cache is empty. This can cause plugins to throw nil errors. This commit changed `kong.vault.update()` function to not touch it if not found in the cache.
github-actions
bot
added
core/pdk
cherry-pick kong-ee
When vault config is changed, in the worker event we first flush the LRU cache, then start to update the secrets from vault provider. There’s a period of time in between that the cache is empty. The `kong.vault.update()` function only lookups cache and will update the secret to an empty string when cache is empty. This can cause plugins to throw nil errors. This commit changed the worker event callback to not flush the LRU cache. The cache will be updated when the secrets are fetched from vault prodiver.
|
Pushed a new commit to fix the issue in another way: instead of not touching input table in the pdk update function, in this new commit I completely removed the LRU:flush_all() line in the worker event. The LRU capacity is fixed and the keys has ttls, so there likely won’t be memory leaks. |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Summary
When vault config is changed, in the worker event we first flush the LRU cache, then start to update the secrets from vault provider. There’s a period of time in between that the cache is empty.
The
kong.vault.update()function only lookups cache and will update the secret to an empty string when cache is empty. This can cause plugins to throw nil errors.This commit changed
kong.vault.update()function to not touch it if not found in the cache.Checklist
changelog/unreleased/kongorskip-changeloglabel added on PR if changelog is unnecessary. README.mdIssue reference
FTI-5936