Fix UDP service blackhole problem when number of endpoints changes from 0 to non-0 #16328
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
(kube-proxy requires it)
openshift-ci-robot
added
the
size/L
|
/unassign |
|
@eparis want to approve the cherry-pick? |
|
/lgtm |
openshift-merge-robot
added
the
approved
…kends changes from 0 to non-0
danwinship
force-pushed
the
udp-service-conntrack
branch
from
825a273
to
2722efa
Compare
openshift-merge-robot
removed
the
lgtm
|
Pushed another commit to add the dep to origin.spec too |
|
/lgtm |
|
[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: danwinship, eparis The full list of commands accepted by this bot can be found here.
Needs approval from an approver in each of these OWNERS Files:
You can indicate your approval by writing |
|
LGTM |
|
/retest |
|
/retest (last errors were fixed by a test change) |
|
/retest Please review the full test history for this PR and help us cut down flakes. |
|
Automatic merge from submit-queue (batch tested with PRs 15725, 16244, 15796, 16328, 16334) |
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Outdated suggestions cannot be applied.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.
When a UDP service goes from 0 endpoints to 1, we need to run "conntrack -D ..." in case there are cached conntrack entries from pods hitting the "-j REJECT" iptables rule that gets installed for services with no endpoints.
Additionally, we need to make sure that OpenShift nodes have conntrack-tools installed so that they can actually run /sbin/conntrack in this and other cases. (There are additional bugs open about fixing the official images.)
Upstream: kubernetes/kubernetes#48524
Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1487438