kube-flannel-cfg: enable hairpin mode #849
Merged
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Hairpin mode is needed to allow pods to communicate with themselves via
Service IP. This change is required as the kubelet --hairpin-mode flag
is not supported when CNI is being used.
This patch is picked from coreos/tectonic-installer#1640
I verified it on K8S 1.7.5 + Flannel vxlan backend, it works as expected.