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Set iptables mode automatically and deprecate ENABLE_NFTABLES #2402

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merged 1 commit into from
Jun 9, 2023

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jdn5126
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@jdn5126 jdn5126 commented Jun 5, 2023

What type of PR is this?
enhancement

Which issue does this PR fix:
#2388

What does this PR do / Why do we need it:
This PR sets the iptables mode for aws-node pod automatically. Rather than using ENABLE_NFTABLES to decide when to run update-alternatives, we now rely on the iptables-wrapper script to set the mode based on which mode kubelet is using (kubelet iptables hint).

This PR also deprecates ENABLE_NFTABLES environment variable as it is no longer needed.

If an issue # is not available please add repro steps and logs from IPAMD/CNI showing the issue:
N/A

Testing done on this change:
Manually verified that iptables-wrapper script is run.

Automation added to e2e:
N/A

Will this PR introduce any new dependencies?:
No

Will this break upgrades or downgrades. Has updating a running cluster been tested?:
No, Yes

Does this change require updates to the CNI daemonset config files to work?:
No

Does this PR introduce any user-facing change?:
Yes

Set iptables mode automatically and deprecate ENABLE_NFTABLES

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

@jdn5126 jdn5126 requested a review from a team as a code owner June 5, 2023 17:08
@jdn5126 jdn5126 force-pushed the iptables_auto branch 2 times, most recently from 4d1057f to 81944dd Compare June 6, 2023 20:22
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/lgtm
Nice!!
Have we verified if it handles the cases correct? i.e setting the right mode based on what's being used by the node?

@jdn5126
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jdn5126 commented Jun 9, 2023

/lgtm Nice!! Have we verified if it handles the cases correct? i.e setting the right mode based on what's being used by the node?

Yep, I verified that the script runs as part of container init and it will switch to iptables-nft when there is a "kubelet hint" in the table for iptables-nft. I also verified that update-alternatives --set iptables /usr/sbin/iptables-wrapper can be run manually using kubectl exec.

@jdn5126 jdn5126 merged commit e1acdf8 into aws:master Jun 9, 2023
@jdn5126 jdn5126 deleted the iptables_auto branch June 9, 2023 14:55
jdn5126 added a commit that referenced this pull request Jun 15, 2023
* refactor canary test to access images from AWS registries (#2398)

* upgrade client-go and controller-runtime modules (#2396)

* updates for v1.13.0 release (#2400)

* chore: Added dependabot (#2403)

* dependency updates (#2412)

* deprecate ENABLE_NFTABLES and set iptables mode using iptables-wrapper script (#2402)

* update networking test agent to go1.20 and latest sys module (#2413)

* skip delete test cluster to debug (#2414)

* Revert "skip delete test cluster to debug (#2414)" (#2415)

This reverts commit 7c30943.

* authenticate to test image registry (#2417)

* update test agent image (#2419)

* update test agent hash in go.mod (#2422)

---------

Co-authored-by: Olivia Song <[email protected]>
Co-authored-by: Ellis Tarn <[email protected]>
jdn5126 added a commit that referenced this pull request Jul 11, 2023
* refactor canary test to access images from AWS registries (#2398)

* upgrade client-go and controller-runtime modules (#2396)

* updates for v1.13.0 release (#2400)

* chore: Added dependabot (#2403)

* dependency updates (#2412)

* deprecate ENABLE_NFTABLES and set iptables mode using iptables-wrapper script (#2402)

* update networking test agent to go1.20 and latest sys module (#2413)

* skip delete test cluster to debug (#2414)

* Revert "skip delete test cluster to debug (#2414)" (#2415)

This reverts commit 7c30943.

* authenticate to test image registry (#2417)

* update test agent image (#2419)

* update test agent hash in go.mod (#2422)

* fix hard-coded nitro instances (#2428)

* move authentication step from test canary script (#2429)

* node initialization must come after primary ENI's security groups are synced to cache (#2427)

* Add 1.27 to Rec Version Table (#2404)

* revise rec version table

* make DOCKER_ARGS a passable var from CLI builds (#2434)

Signed-off-by: jonahjon <[email protected]>

* Update Kops cluster to latest and add parameter for kops version (#2435)

* Updates instance limits including c7gn (#2438)

* Update Kops cluster to latest and add parameter for kops version (#2440)

* update image tag to v1.13.2 (#2432)

* update docs and CNI logging (#2433)

* remove default canary test run from integration tests (#2443)

* Silences nightly cron jobs for forks (#2444)

* Silences weekly cron jobs for forks (#2459)

* refactor performance tests (#2455)

* add custom-networking test covering ENIConfig objects with no security (#2445)

groups

* k8s clients only need to access corev1; add pod selector (#2463)

---------

Signed-off-by: jonahjon <[email protected]>
Co-authored-by: Olivia Song <[email protected]>
Co-authored-by: Ellis Tarn <[email protected]>
Co-authored-by: Geoffrey Cline <[email protected]>
Co-authored-by: Jonah Jones <[email protected]>
Co-authored-by: Jay Deokar <[email protected]>
Co-authored-by: Matt <[email protected]>
Co-authored-by: Matt <[email protected]>
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2 participants