cleaning up the build process for docker (hyperledger#1590)

Signed-off-by: Adrian Sutton <adrian.sutton@consensys.net>

Jenkinsfile

@@ -185,20 +185,20 @@ try {
                 def stage_name = 'Kubernetes Docker image node: '
                 def image = imageRepos + '/pantheon-kubernetes:' + imageTag
                 def kubernetes_folder = 'kubernetes'
-                def kubernetes_image_build_script = kubernetes_folder + '/build_image.sh'
                 def version_property_file = 'gradle.properties'
                 def reports_folder = kubernetes_folder + '/reports'
                 def dockerfile = kubernetes_folder + '/Dockerfile'
                 node {
                     checkout scm
-                    unstash 'distTarBall'
                     docker.image(build_image).inside() {
                         stage(stage_name + 'Dockerfile lint') {
                             sh "docker run --rm -i hadolint/hadolint < ${dockerfile}"
                         }
+
                         stage(stage_name + 'Build image') {
-                            sh "${kubernetes_image_build_script} '${image}'"
+                            sh './gradlew docker'
                         }
+
                         stage(stage_name + "Test image labels") {
                             shortCommit = sh(returnStdout: true, script: "git log -n 1 --pretty=format:'%h'").trim()
                             version = sh(returnStdout: true, script: "grep -oE \"version=(.*)\" ${version_property_file} | cut -d= -f2").trim()
@@ -211,6 +211,7 @@ try {
     ${image} \
     | grep ${version}"
                         }
+
                         try {
                             stage(stage_name + 'Test image') {
                                 sh "mkdir -p ${reports_folder}"

build.gradle

@@ -13,6 +13,8 @@
 
 import net.ltgt.gradle.errorprone.CheckSeverity
 
+import java.text.SimpleDateFormat
+
 plugins {
   id 'com.diffplug.gradle.spotless' version '3.23.1'
   id 'com.jfrog.bintray' version '1.8.4'
@@ -22,6 +24,7 @@ plugins {
   id 'me.champeau.gradle.jmh' version '0.4.8' apply false
   id 'net.ltgt.errorprone' version '0.8.1'
   id 'net.researchgate.release' version '2.7.0'
+  id "com.palantir.docker" version "0.22.1"
 }
 
 group = 'tech.pegasys.pantheon'
@@ -397,6 +400,35 @@ distZip {
   }
 }
 
+// rename the top level dir from pantheon-<version> to pantheon and this makes it really
+// simple for use in docker
+tasks.register("dockerDistUntar") {
+  dependsOn distTar
+  def dockerBuildDir = "build/distributions/docker-pantheon/"
+  def distTarFile = distTar.outputs.files.singleFile
+  def distTarFileName = distTar.outputs.files.singleFile.name.replace(".tar.gz", "")
+
+  doFirst {
+    new File(dockerBuildDir).mkdir()
+    copy {
+      from tarTree(distTarFile)
+      into (dockerBuildDir)
+    }
+    file("${dockerBuildDir}/${distTarFileName}").renameTo("${dockerBuildDir}/pantheon")
+  }
+}
+
+docker {
+  def image_tag = "develop"
+  dependsOn dockerDistUntar
+  name "pegasyseng/pantheon-kubernetes:${image_tag}"
+  dockerfile file('kubernetes/Dockerfile')
+  files "build/distributions/docker-pantheon/"
+  buildArgs(['BUILD_DATE': buildTime(), 'VERSION': rootProject.version, 'VCS_REF': getCheckedOutGitCommitHash()])
+  pull true
+  noCache true
+}
+
 task jacocoRootReport(type: org.gradle.testing.jacoco.tasks.JacocoReport) {
   additionalSourceDirs.from files(subprojects.sourceSets.main.allSource.srcDirs)
   sourceDirectories.from files(subprojects.sourceSets.main.allSource.srcDirs)
@@ -422,6 +454,14 @@ configure(subprojects.findAll {it.name != 'errorprone-checks'}) {
   }
 }
 
+// http://label-schema.org/rc1/
+// using the RFC3339 format "2016-04-12T23:20:50.52Z"
+def buildTime() {
+  def df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm'Z'")
+  df.setTimeZone(TimeZone.getTimeZone("UTC"))
+  return df.format(new Date())
+}
+
 // Takes the version, and if -SNAPSHOT is part of it replaces SNAPSHOT
 // with the git commit version.
 def calculateVersion() {

docker/.gitignore

@@ -1 +1,2 @@
 pantheon-*.tar.gz
+pantheon/*

docker/Dockerfile

@@ -1,10 +1,6 @@
 FROM openjdk:11.0.2-jre-slim-stretch
 
-COPY pantheon-*.tar.gz /tmp/.
-RUN tar xzf /tmp/pantheon-*.tar.gz -C /tmp && \
-  rm /tmp/pantheon-*.tar.gz && \
-  mv /tmp/pantheon-* /opt/pantheon
-
+COPY pantheon /opt/pantheon/
 
 RUN mkdir /var/lib/pantheon
 RUN mkdir /etc/pantheon/

kubernetes/Dockerfile

@@ -1,27 +1,19 @@
-# extract image stage
-# extractin here reduces the number of layers in the final image
-FROM alpine:3.9 AS extract-stage
-# Copy Pantheon binaries from previous jenkins artefact step
-# or from the result of ./gradlew distTar
-# and lett ADD unpack them
-ADD pantheon-*.tar.gz /tmp/
 
-# Run image stage
-# Use openJDK JRE only for running pantheon
 FROM openjdk:11.0.2-jre-slim-stretch
-# Copy extracted binaries from the previous step image
-COPY --from=extract-stage /tmp/pantheon* /opt/pantheon
+
+COPY pantheon /opt/pantheon/
 WORKDIR /opt/pantheon
+
 # Expose services ports
 # 8545 HTTP JSON-RPC
 # 8546 WS JSON-RPC
 # 8547 HTTP GraphQL
 # 30303 P2P
 EXPOSE 8545 8546 8547 30303
+
 ENTRYPOINT ["/opt/pantheon/bin/pantheon"]
+
 # Build-time metadata as defined at http://label-schema.org
-# Use the build_image.sh script in the kubernetes directory of this project to
-# easily build this image or as an example of how to inject build parameters.
 ARG BUILD_DATE
 ARG VCS_REF
 ARG VERSION