Reduce size of docker images for PAP

Remove unused jar files from image (not needed since spring boot)
Avoid creating extra layers when extracting tarball
Reduce size of Alpine image by 73% (959MB to 259MB)
Reduce size of OpenSuse image by 62% (1.12GB to 423MB)

Issue-ID: POLICY-4266
Signed-off-by: danielhanrahan <daniel.hanrahan@est.tech>
Change-Id: I5a0a3efc81b0cb8da899c12f65479fd2af935451

2 files changed, 24 insertions, 20 deletions

diff --git a/packages/policy-pap-docker/src/main/docker/Dockerfile b/packages/policy-pap-docker/src/main/docker/Dockerfile
index e4a8ca3c..0b17b355 100644
--- a/packages/policy-pap-docker/src/main/docker/Dockerfile
+++ b/packages/policy-pap-docker/src/main/docker/Dockerfile
@@ -21,6 +21,11 @@
 # ============LICENSE_END=========================================================
 #-------------------------------------------------------------------------------
 
+FROM busybox AS tarball
+RUN mkdir /packages /extracted
+COPY /maven/lib/policy-pap.tar.gz /packages/
+RUN tar xvzf /packages/policy-pap.tar.gz --directory /extracted/
+
 FROM onap/policy-jre-alpine:2.4.3
 
 LABEL maintainer="Policy Team"
@@ -38,20 +43,16 @@ ARG POLICY_LOGS=/var/log/onap/policy/pap
 ENV POLICY_LOGS=$POLICY_LOGS
 ENV POLICY_HOME=$POLICY_HOME/pap
 
-RUN mkdir -p $POLICY_HOME $POLICY_LOGS $POLICY_HOME/bin && \
-    chown  -R policy:policy $POLICY_HOME $POLICY_LOGS && \
-    mkdir /packages
-COPY /maven/lib/policy-pap.tar.gz /packages
+RUN mkdir -p $POLICY_HOME $POLICY_LOGS && \
+    chown -R policy:policy $POLICY_HOME $POLICY_LOGS
 
-RUN tar xvfz /packages/policy-pap.tar.gz --directory $POLICY_HOME \
-    && rm /packages/policy-pap.tar.gz
+COPY --chown=policy:policy --from=tarball /extracted $POLICY_HOME
 
 WORKDIR $POLICY_HOME
-COPY policy-pap.sh  bin/.
-COPY /maven/pap.jar /app
-
+COPY --chown=policy:policy policy-pap.sh bin/
+COPY --chown=policy:policy /maven/pap.jar /app/
 
-RUN chown -R policy:policy * && chmod 755 bin/*.sh && chown -R policy:policy /app
+RUN chmod 755 bin/*.sh
 
 USER policy
 WORKDIR $POLICY_HOME/bin
diff --git a/packages/policy-pap-docker/src/main/docker/suse.Dockerfile b/packages/policy-pap-docker/src/main/docker/suse.Dockerfile
index 78fd57e2..0641ffbe 100644
--- a/packages/policy-pap-docker/src/main/docker/suse.Dockerfile
+++ b/packages/policy-pap-docker/src/main/docker/suse.Dockerfile
@@ -19,6 +19,11 @@
 # ============LICENSE_END=========================================================
 #-------------------------------------------------------------------------------
 
+FROM busybox AS tarball
+RUN mkdir /packages /extracted
+COPY /maven/lib/policy-pap.tar.gz /packages/
+RUN tar xvzf /packages/policy-pap.tar.gz --directory /extracted/
+
 FROM opensuse/leap:15.4
 
 LABEL maintainer="Policy Team"
@@ -38,22 +43,20 @@ ENV POLICY_HOME=/opt/app/policy/pap
 ENV LANG=en_US.UTF-8 LANGUAGE=en_US:en LC_ALL=en_US.UTF-8
 ENV JAVA_HOME=/usr/lib64/jvm/java-11-openjdk-11
 
-RUN zypper -n -q install --no-recommends gzip java-11-openjdk-headless netcat-openbsd tar && \
+RUN zypper -n -q install --no-recommends java-11-openjdk-headless netcat-openbsd && \
     zypper -n -q update && zypper -n -q clean --all && \
     groupadd --system policy && \
     useradd --system --shell /bin/sh -G policy policy && \
-    mkdir -p /app $POLICY_LOGS $POLICY_HOME $POLICY_HOME/bin && \
-    chown -R policy:policy /app $POLICY_HOME $POLICY_LOGS && \
-    mkdir /packages
-COPY /maven/lib/policy-pap.tar.gz /packages
-RUN tar xvfz /packages/policy-pap.tar.gz --directory $POLICY_HOME && \
-    rm /packages/policy-pap.tar.gz
+    mkdir -p $POLICY_HOME $POLICY_LOGS && \
+    chown -R policy:policy $POLICY_HOME $POLICY_LOGS
+
+COPY --chown=policy:policy --from=tarball /extracted $POLICY_HOME
 
 WORKDIR $POLICY_HOME
-COPY policy-pap.sh  bin/.
-COPY /maven/pap.jar /app
+COPY --chown=policy:policy policy-pap.sh bin/
+COPY --chown=policy:policy /maven/pap.jar /app/
 
-RUN chown -R policy:policy * && chmod 755 bin/*.sh && chown -R policy:policy /app
+RUN chmod 755 bin/*.sh
 
 USER policy
 WORKDIR $POLICY_HOME/bin