added linkerd ingress operator

testapp/linkerd-ingress-operator/hooks/ingress-add.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+if [[ $1 == "--config" ]]; then
+  cat <<EOF
+{
+  "onKubernetesEvent": [
+    {
+      "kind": "Ingress",
+      "event": ["add"]
+    }
+  ]
+}
+EOF
+else
+  json=${BINDING_CONTEXT_PATH}
+  ns=$(jq -r '.[0].resourceNamespace' ${json})
+  res=$(jq -r '.[0].resourceName' ${json})
+  tmp=$(mktemp)
+  kubectl -n "${ns}" get ingress "${res}" -ojson >${tmp} || { echo "error: getting ingress ${ns}/${res} failed">&2; exit 0; }
+  class=$(jq -r '.metadata.annotations."kubernetes.io/ingress.class"' ${tmp})
+  [[ "${class}" == "nginx" ]] || { echo "notice: ingress class ${ns}/${res} is not 'nginx'"; exit 0; }
+  port=$(jq -r '.spec.rules[0].http.paths[0].backend.servicePort' ${tmp})
+  ann=$(jq -r '.metadata.annotations."nginx.ingress.kubernetes.io/configuration-snippet"' ${tmp})
+  rm -f ${tmp}
+  [[ "${ann}" =~ "l5d-dst-override" ]] && { echo "notice: ingress ${ns}/${res} already has 'l5d-dst-override' header"; exit 0; }
+  [[ "${ann}" == "null" ]] && ann="" || ann="${ann}"$'\n'
+  ann="${ann}proxy_set_header l5d-dst-override \$service_name.\$namespace.svc.cluster.local:${port}"$';\nproxy_hide_header l5d-remote-ip;\nproxy_hide_header l5d-server-id;\n'
+  kubectl -n "${ns}" annotate ingress "${res}" nginx.ingress.kubernetes.io/configuration-snippet="${ann}"
+fi