Kubeadm: Install conntrack as a deb/rpm dep?

[luxas]

From kubelet logs in a fresh v1.13.0-rc.1 install:

Nov 28 12:40:01 kubeadm-test kubelet[12151]: W1128 12:40:01.147255   12151 hostport_manager.go:68] The binary conntrack is not installed, this can cause failures in network connection cleanup.

[mauilion]

/assign

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[mauilion]

I am interested in taking this on.

[luxas]

Thanks @mauilion! Making sure conntrack is a dep of (all!) our packages is necessary for this.
For context, can you also research why it's needed etc. please

[mauilion]

@luxas I am looking at doing this work in k8s.io/release there is also a set of files in k8s.io/kubernetes/build/ should I update both or just the release side?

Also per your comment shall I update kube{adm,let} with this dependency? The container images likely already grab conntrack.

[dims]

@mauilion we need to keep both in sync for the time being. yes please

[luxas]

Reopening to track https://github.com/kubernetes/release/pull/653

[neolit123]

seems that kubernetes/release#653 was merged.
please reopen again if needed.