use local binary for k8s-keystone-auth image

Author: dims

cluster/images/webhook/Dockerfile

@@ -1,15 +1,21 @@
-FROM ubuntu:16.04
-MAINTAINER Saverio Proto <[email protected]>
-RUN apt-get update && \
-    apt-get install -y software-properties-common
-RUN add-apt-repository -y ppa:masterminds/glide
-RUN apt-get update && \
-    apt-get install -y glide git build-essential golang && \
-    apt-get clean && \
-    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
-RUN git clone https://github.com/dims/k8s-keystone-auth
-WORKDIR k8s-keystone-auth
-RUN make depend && make build
+# 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:3.7
+
+RUN apk add --no-cache ca-certificates
+
+ADD k8s-keystone-auth /bin/
+
 EXPOSE 8443
 CMD ./bin/k8s-keystone-auth --tls-cert-file ${API_SERVER_CERT} --tls-private-key-file ${API_SERVER_KEY} --keystone-url ${OPENSTACK_KEYSTONE_URL}