Increase size of connection tracking table #1328
Draft
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
We have seen occurences of Cinder or Glance activity filling up the conntrack table. This has been seen on controllers and storage nodes (Ceph). We have also seen large amounts of traffic to an Octavia amphora causing the conntrack table of a compute host to fill up. Quadruple the maximum size of the table on these hosts (the default size is 262,144 for hosts with more than 4 GiB of memory [1]). Monitoring hosts are left unchanged since they are believed to be unaffected. [1] https://www.kernel.org/doc/Documentation/networking/nf_conntrack-sysctl.txt
|
The conntrack table can only be increased if the |
In the situation where we've enabled the firewall then chosen to disable it, is it safe to assume nf_conntrack will have also been disabled/unloaded? |
Alex-Welsh
added
bug
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Outdated suggestions cannot be applied.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.
We have seen occurences of Cinder or Glance activity filling up the conntrack table. This has been seen on controllers and storage nodes (Ceph). We have also seen large amounts of traffic to an Octavia amphora causing the conntrack table of a compute host to fill up.
Quadruple the maximum size of the table on these hosts (the default size is 262,144 for hosts with more than 4 GiB of memory [1]).
Monitoring hosts are left unchanged since they are believed to be unaffected.
[1] https://www.kernel.org/doc/Documentation/networking/nf_conntrack-sysctl.txt