fix(k8s): fall back to legacy iptables - #2130
Open
stephenlclarke wants to merge 1 commit into
Open
Conversation
Probe the nftables backend during node preparation and select the legacy iptables alternatives when the node kernel cannot use nftables. Apply the MSS rules through the selected system backend. Fixes apple#2120
This file contains hidden or 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
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
Type of Change
Motivation and Context
Closes #2120.
Probe the nftables backend during node preparation. When the node kernel cannot use it, select the available legacy iptables and ip6tables alternatives before applying the MSS rules. This also keeps subsequent Kubernetes components on the working backend.
Testing
Negative control with the former hard-coded nft path: the behavior fixture exited unsuccessfully and applied neither fallback nor MSS rules.
make fmt,make check, andgit diff --check: passed