Allow local loopback traffic not to be redirected (#12110)
Allow local loopback traffic not to be redirected (#12110)

If Envoy does not have a listener to send local loopback traffic to 127.0.0.1, the rule "iptables -t nat -A ISTIO_OUTPUT -o lo ! -d 127.0.0.1/32 -j ISTIO_REDIRECT" would cause infinite loop. For deployment that does not have server side proxy, environment variable DISABLE_REDIRECTION_ON_LOCAL_LOOPBACK can be defined to be non-empty to avoid the fatal loop.
istio/istio,smawson/istio,istio/istio,geeknoid/istio,istio/istio,smawson/istio,smawson/istio,geeknoid/istio,istio/istio,geeknoid/istio,geeknoid/istio,geeknoid/istio,smawson/istio,geeknoid/istio,smawson/istio,smawson/istio,istio/istio