Add new cfssl image and update e2e tests to use it

images/README.md

@@ -9,5 +9,6 @@ fastcgi-helloserver | FastCGI application for e2e tests
 grpc-fortune-teller | grpc server application for the nginx-ingress grpc example
 httpbin | A simple HTTP Request & Response Service for e2e tests
 nginx | NGINX base image using [alpine linux](https://www.alpinelinux.org)
+cfssl | Image to run cfssl commands
 
 :bangbang: Only the nginx image is meant to be published. The others are used as examples for some feature of the ingress controller or to run e2e tests.

images/cfssl/Makefile

@@ -0,0 +1,33 @@
+# Copyright 2020 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Docker image for e2e testing.
+
+# Use the 0.0 tag for testing, it shouldn't clobber any release builds
+TAG ?= 0.0
+
+REGISTRY ?= ingress-controller
+DOCKER ?= docker
+
+IMGNAME = cfssl
+IMAGE = $(REGISTRY)/$(IMGNAME)
+
+container:
+	$(DOCKER) buildx build \
+		--load \
+		--platform linux/amd64 \
+		-t $(IMAGE):$(TAG) rootfs
+
+clean:
+	$(DOCKER) rmi -f $(IMAGE):$(TAG) || true

images/cfssl/rootfs/Dockerfile

@@ -0,0 +1,24 @@
+# Copyright 2019 The Kubernetes Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+FROM alpine:3.11
+
+RUN echo "@testing http://nl.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories
+RUN apk add --no-cache \
+    bash \
+    cfssl@testing
+
+EXPOSE 8888
+
+CMD ["cfssl"]

images/e2e/Dockerfile

@@ -138,4 +138,8 @@ RUN wget https://github.com/helm/chart-testing/releases/download/v${CHART_TESTIN
 
 RUN curl -sSL https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash
 
+RUN  curl -sSL -o /usr/local/bin/cfssl     https://github.com/cloudflare/cfssl/releases/download/v1.4.1/cfssl_1.4.1_linux_amd64 \
+  && curl -sSL -o /usr/local/bin/cfssljson https://github.com/cloudflare/cfssl/releases/download/v1.4.1/cfssljson_1.4.1_linux_amd64 \
+  && chmod +x /usr/local/bin/cfssl*
+
 WORKDIR $GOPATH