Comment # 31 on bug 1197490 from Fabian Vogt

(In reply to Robert Munteanu from comment #30)
> (In reply to Fabian Vogt from comment #29)
> > That looks like the used CNI plugin is still the old broken one. Did the
> > weave-init container run and replace it?
> 
> I am not sure about replacing it. Initially the output from the weave-init
> container is
> 
> modprobe: can't load module ip_set
> (kernel/net/netfilter/ipset/ip_set.ko.zst): invalid module format
> Ignore the error if "xt_set" is built-in in the kernel
> 
> I restarted all pods in the weave daemonset, but that did not help. There is
> no more output from the weave-init container, but the containers are still
> stuck in the ContainerCreating status.

FWICT, weave-init does

    if [ ! -f "$1/$CNI_PLUGIN_NAME" ]; then
        cp /usr/bin/weaveutil "$1/$CNI_PLUGIN_NAME"
    fi

so it doesn't overwrite an existing cni plugin. You can try rm
/opt/cni/bin/weave* and restarting weave-init.