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fix: ensure nf_conntrack module loaded for kubelite. #4705

Merged
merged 1 commit into from
Oct 23, 2024
Merged

fix: ensure nf_conntrack module loaded for kubelite. #4705

merged 1 commit into from
Oct 23, 2024

Commits on Oct 16, 2024

  1. fix: ensure nf_conntrack module loaded for kubelite. 

    This patch ensures that the `nf_conntrack` kernel module is loaded
before `kubelite` is started as the ProxyServer needs to read some
conntrack module-related params from procfs.

Previously, although the it would always crashed if the module wasn't
loaded, this wasn't that common of an occurrence in practice as there
are quite a few ways `nf_conntrack` gets loaded transparently:
* Cilium [automatically loads `iptable_nat`](https://github.com/cilium/cilium/blob/63cd391f93b4e2c865268241d384504348672042/pkg/datapath/iptables/iptables.go#L367-L368)
after a small startup delay, whose dependency tree includes `nf_conntrack`
* starting firewalld/ufw/most other firewall services
* setting iptables/nftables rules which imply session tracking

By explicitly loading `nf_conntrack` before starting `kubelite`,
it should ensure the procfs values ther ProxyServer reads are
always present on startup.

Signed-off-by: Nashwan Azhari <nazhari@cloudbasesolutions.com>
    @aznashwan
    aznashwan committed Oct 16, 2024
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