From: Singal, Kapil (ks220y) <ks220y@att.com>
Date: Mon, 22 Mar 2021 00:33:50 +0000 (-0400)
Subject: Refactoring DockerFile for multistage build
X-Git-Tag: 1.2.0~38
X-Git-Url: https://gerrit.onap.org/r/gitweb?p=ccsdk%2Fdistribution.git;a=commitdiff_plain;h=9558e243855606a3fc617d6629fb40bb9766bf1e;hp=2b91b0229dce35744d0604fdd129d4adff3637aa

Refactoring DockerFile for multistage build

Tested locally and it reduced 2 layers and image size by approx 100MBs

Issue-ID: CCSDK-3226
Signed-off-by: Singal, Kapil (ks220y) <ks220y@att.com>
Change-Id: I478996f9eb91f92fb385593d0f090787cfefcb8d
---

diff --git a/opendaylight/aluminum/aluminum-alpine/src/main/docker/Dockerfile b/opendaylight/aluminum/aluminum-alpine/src/main/docker/Dockerfile
index 9ef70db1..c4cced8a 100644
--- a/opendaylight/aluminum/aluminum-alpine/src/main/docker/Dockerfile
+++ b/opendaylight/aluminum/aluminum-alpine/src/main/docker/Dockerfile
@@ -1,10 +1,11 @@
-FROM onap/ccsdk-alpine-j11-image:${project.docker.latestfulltag.version}
-MAINTAINER CCSDK Team (onap-ccsdk@lists.onap.org)
+# Prepare stage for multistage image build
+## START OF STAGE0 ##
+FROM onap/ccsdk-alpine-j11-image:${project.docker.latestfulltag.version} AS stage0
+USER root
 
 ENV ODL_HOME /opt/opendaylight/current
 
 # copy the opendaylight tar and expand
-USER root
 COPY ${odl.karaf.artifactId}-${ccsdk.opendaylight.version}.tar.gz /tmp/
 RUN mkdir -p /opt/odl \
     && tar zxvf /tmp/${odl.karaf.artifactId}-${ccsdk.opendaylight.version}.tar.gz --directory /opt/odl \
@@ -19,6 +20,18 @@ COPY system $ODL_HOME/system
 #COPY configure_cluster.sh configure-cluster-ipdetect.sh custom_shard_config.txt set_persistence.sh $ODL_HOME/bin/
 #RUN chmod 755 $ODL_HOME/bin/configure_cluster.sh $ODL_HOME/bin/configure-cluster-ipdetect.sh $ODL_HOME/bin/set_persistence.sh $ODL_HOME/bin/custom_shard_config.txt
 
+## END OF STAGE0 ##
+
+
+## This will create actual image
+FROM onap/ccsdk-alpine-j11-image:${project.docker.latestfulltag.version}
+MAINTAINER CCSDK Team (onap-ccsdk@lists.onap.org)
+USER root
+
+ENV ODL_HOME /opt/opendaylight/current
+
+COPY --from=stage0 /opt /opt
+
 # ENTRYPOINT exec /opt/opendaylight/bin/karaf
 WORKDIR $ODL_HOME
 USER onap