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Currently, Kilo _only_ supports adding firewall rules via the legacy iptables API. This means that on systems using nftables in the host network namespace, the namespace will be polluted and both firewall infrastructures will be used, causing unexpected and difficult to predict interactions. In other words, networking may not work as expected on nftables-based systems. This PR fixes this by using the iptables-wrappers project [0] to install run-time detection of the in-use iptables backend. [0] https://github.com/kubernetes-sigs/iptables-wrappers Signed-off-by: Lucas Servén Marín <lserven@gmail.com>
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Slack discussion: https://kubernetes.slack.com/archives/C022EB4R7TK/p1650462112734979 |
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Currently, Kilo only supports adding firewall rules via the legacy
iptables API. This means that on systems using nftables in the host
network namespace, the namespace will be polluted and both firewall
infrastructures will be used, causing unexpected and difficult
to predict interactions. In other words, networking may not work as
expected on nftables-based systems.
This PR fixes this by using the iptables-wrappers project [0] to install
run-time detection of the in-use iptables backend.
[0] https://github.com/kubernetes-sigs/iptables-wrappers
Signed-off-by: Lucas Servén Marín lserven@gmail.com