Commits on Sep 20, 2017

1. sdn: disable hostport handling when CRIO is used …

   This is a workaround because CRIO's CNI driver has different
   hostport behavior than Kubernetes' CNI driver.  Kube leaves all
   hostport handling to the CNI plugin itself, while CRIO does
   hostport handling internally, leading to duplicate work if the
   plugin also handles hostports.
   
   For now, detect the runtime based on socket path and disable
   openshift-sdn hostport handling if the runtime is CRIO.
   
   The real fix for this is to add hostport handling to Kube's CNI
   driver, but in the "split" mode discussed upstream where kube's
   CNI driver handles the port reservations on the host, while the
   plugin handles the actual iptables rules.  CRIO should be converted
   to this scheme as well, and plugins will indicate with capabilities
   in the CNI JSON whether they support this scheme or not.  At
   that point we can remove this hack and just have openshift-sdn
   advertise portmapping support via the CNI JSON.

   

   dcbw committed Sep 20, 2017
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