Dockerfile: adding clang gpg public key

Signed-off-by: André Martins <andre@cilium.io>

Dockerfile

@@ -10,8 +10,12 @@ apt-get install -y --no-install-recommends gcc make libelf-dev bison flex git li
 # clang-3.8.1-begin
 apt-get install -y --no-install-recommends curl xz-utils && \
 cd /tmp && \
+gpg --import /tmp/cilium-net-build/src/github.com/cilium/cilium/contrib/packaging/docker/clang-3.8.1.key && \
 curl -Ssl -o clang+llvm.tar.xz \
 http://releases.llvm.org/3.8.1/clang+llvm-3.8.1-x86_64-linux-gnu-ubuntu-16.04.tar.xz && \
+curl -Ssl -o clang+llvm.tar.xz.sig \
+http://releases.llvm.org/3.8.1/clang+llvm-3.8.1-x86_64-linux-gnu-ubuntu-16.04.tar.xz.sig && \
+gpg --verify clang+llvm.tar.xz.sig && \
 mkdir -p /usr/local && \
 tar -C /usr/local -xJf ./clang+llvm.tar.xz && \
 mv /usr/local/clang+llvm-3.8.1-x86_64-linux-gnu-ubuntu-16.04 /usr/local/clang+llvm && \
@@ -49,7 +53,7 @@ make PKG_BUILD=1 install && \
 #
 apt-get purge --auto-remove -y gcc make bison flex git curl xz-utils && \
 apt-get clean && \
-rm -fr /var/lib/apt/lists/* /tmp/* /var/tmp/* /usr/local/go && \
+rm -fr /root /var/lib/apt/lists/* /tmp/* /var/tmp/* /usr/local/go && \
 echo '#!/usr/bin/env bash\ncp /opt/cni/bin/cilium-cni /tmp/cni/bin && /usr/bin/cilium-agent $@' > /home/with-cni.sh && \
 chmod +x /home/with-cni.sh
 

contrib/packaging/cp-dirs.sh

@@ -8,7 +8,8 @@ cp -vR "${root_dir}/api" "${dest}"
 cp -vR "${root_dir}/bpf" "${dest}"
 cp -vR "${root_dir}/cilium" "${dest}"
 cp -vR "${root_dir}/common" "${dest}"
-mkdir -p "${dest}/contrib"
+mkdir -p "${dest}/contrib/packaging/docker"
+cp -v "${root_dir}/contrib/packaging/docker/clang-3.8.1.key" "${dest}/contrib/packaging/docker"
 cp -vR "${root_dir}/contrib/systemd" "${dest}/contrib"
 cp -vR "${root_dir}/contrib/upstart" "${dest}/contrib"
 cp -vR "${root_dir}/daemon" "${dest}"

contrib/packaging/docker/Makefile

@@ -11,7 +11,7 @@ build: clean
 	docker build -t "cilium:cilium-ubuntu-16-04" $(BUILDDIR)
 
 clean:
-	ls -d ./* | grep -vE Makefile | xargs rm -rf
+	ls -d ./* | grep -vE "Makefile|clang-3.8.1.key" | xargs rm -rf
 
 .PHONY: clean build force
 force :;

contrib/packaging/docker/clang-3.8.1.key

@@ -0,0 +1,43 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+
+mQENBFNoLTkBCADXH3jKqmlGe+g54RIJ73YbqtSn1YCuZwSjdhG1nsvpglp8CZSd
+3ZwAUBRArRttrWNFMQNNBBt/10JKCw5MTEYzSeDgoVXmrOKcWjC7JGK4/ezQP/i/
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+HEA0
+=lNsd
+-----END PGP PUBLIC KEY BLOCK-----