Disable go modules (#4583)

Makefile

@@ -58,11 +58,15 @@ GOOS = linux
 
 MULTI_ARCH_IMAGE = $(REGISTRY)/nginx-ingress-controller-${ARCH}
 
+# use vendor directory instead of go modules https://github.com/golang/go/wiki/Modules
+GO111MODULE=off
+
 export ARCH
 export TAG
 export PKG
 export GOARCH
 export GOOS
+export GO111MODULE
 export GIT_COMMIT
 export GOBUILD_FLAGS
 export REPO_INFO
@@ -202,9 +206,9 @@ check_dead_links:
 
 .PHONY: dep-ensure
 dep-ensure:
-	GO111MODULE=on go mod tidy -v
+	go mod tidy -v
 	find vendor -name '*_test.go' -delete
-	GO111MODULE=on go mod vendor
+	go mod vendor
 
 .PHONY: dev-env
 dev-env:

build/build-plugin.sh

@@ -44,6 +44,8 @@ if [ "$missing" = true ]; then
 fi
 
 export CGO_ENABLED=0
+# use vendor directory instead of go modules https://github.com/golang/go/wiki/Modules
+export GO111MODULE=off
 
 release=cmd/plugin/release
 

build/cover.sh

@@ -29,6 +29,8 @@ fi
 
 export CGO_ENABLED=1
 export GODEBUG=netdns=go+2
+# use vendor directory instead of go modules https://github.com/golang/go/wiki/Modules
+export GO111MODULE=off
 
 rm -rf coverage.txt
 for d in $(go list "${PKG}/..." | grep -v vendor | grep -v '/test/e2e' | grep -v images); do

build/run-in-docker.sh

@@ -53,6 +53,7 @@ docker run                                            \
   --rm                                                \
   ${DOCKER_OPTS}                                      \
   -e GOCACHE="/go/src/${PKG}/.cache"                  \
+  -e GO111MODULE=off                                  \
   -v "${HOME}/.kube:${HOME}/.kube"                    \
   -v "${KUBE_ROOT}:/go/src/${PKG}"                    \
   -v "${KUBE_ROOT}/bin/${ARCH}:/go/bin/linux_${ARCH}" \

build/test.sh

@@ -31,6 +31,8 @@ fi
 # enabled to use host dns resolver
 export CGO_ENABLED=1
 export GODEBUG=netdns=go+2
+# use vendor directory instead of go modules https://github.com/golang/go/wiki/Modules
+export GO111MODULE=off
 
 go test -v -race \
   $(go list "${PKG}/..." | grep -v vendor | grep -v '/test/e2e' | grep -v images | grep -v "docs/examples")