adding a retry mechanism, if first attempt of curl fails.

Author: PatrickLaabs

hack/ensure-kind.sh

@@ -43,7 +43,7 @@ verify_kind_version() {
       if ! [ -d "${GOPATH_BIN}" ]; then
         mkdir -p "${GOPATH_BIN}"
       fi
-      curl -sLo "${GOPATH_BIN}/kind" "https://github.com/kubernetes-sigs/kind/releases/download/${MINIMUM_KIND_VERSION}/kind-${goos}-${goarch}"
+      curl --retry 5 --retry-all-errors -sLo "${GOPATH_BIN}/kind" "https://github.com/kubernetes-sigs/kind/releases/download/${MINIMUM_KIND_VERSION}/kind-${goos}-${goarch}"
       chmod +x "${GOPATH_BIN}/kind"
       verify_gopath_bin
     else