Externalize build properties.

See #1629.

Jenkinsfile

@@ -1,3 +1,9 @@
+def p = [:]
+node {
+    checkout scm
+    p = readProperties interpolate: true, file: 'ci/pipeline.properties'
+}
+
 pipeline {
 	agent none
 
@@ -12,7 +18,7 @@ pipeline {
 	}
 
 	stages {
-		stage("test: baseline (jdk8)") {
+		stage("test: baseline (main)") {
 			agent {
 				label 'data'
 			}
@@ -23,7 +29,7 @@ pipeline {
 			steps {
 				script {
 					docker.withRegistry('', 'hub.docker.com-springbuildmaster') {
-						docker.image('adoptopenjdk/openjdk8:latest').inside('-v $HOME:/tmp/jenkins-home') {
+						docker.image(p['docker.java.main.image']).inside(p['docker.java.inside.basic']) {
 							sh 'MAVEN_OPTS="-Duser.name=jenkins -Duser.home=/tmp/jenkins-home" ./mvnw -s settings.xml clean dependency:list verify -Dsort -B'
 						}
 					}
@@ -36,7 +42,7 @@ pipeline {
 				branch(pattern: "main|(\\d\\.\\d\\.x)", comparator: "REGEXP")
 			}
 			parallel {
-				stage("test: baseline (jdk11)") {
+				stage("test: baseline (next)") {
 					agent {
 						label 'data'
 					}
@@ -47,7 +53,7 @@ pipeline {
 					steps {
 						script {
 							docker.withRegistry('', 'hub.docker.com-springbuildmaster') {
-								docker.image('adoptopenjdk/openjdk11:latest').inside('-v $HOME:/tmp/jenkins-home') {
+								docker.image(p['docker.java.next.image']).inside(p['docker.java.inside.basic']) {
 									sh 'MAVEN_OPTS="-Duser.name=jenkins -Duser.home=/tmp/jenkins-home" ./mvnw -s settings.xml -Pjava11 clean dependency:list verify -Dsort -B'
 								}
 							}
@@ -55,7 +61,7 @@ pipeline {
 					}
 				}
 
-				stage("test: baseline (jdk17)") {
+				stage("test: baseline (LTS)") {
 					agent {
 						label 'data'
 					}
@@ -66,7 +72,7 @@ pipeline {
 					steps {
 						script {
 							docker.withRegistry('', 'hub.docker.com-springbuildmaster') {
-								docker.image('openjdk:17-bullseye').inside('-v $HOME:/tmp/jenkins-home') {
+								docker.image(p['docker.java.lts.image']).inside(p['docker.java.inside.basic']) {
 									sh 'MAVEN_OPTS="-Duser.name=jenkins -Duser.home=/tmp/jenkins-home" ./mvnw -s settings.xml -Pjava11 clean dependency:list verify -Dsort -B'
 								}
 							}
@@ -89,7 +95,7 @@ pipeline {
 			steps {
 				script {
 					docker.withRegistry('', 'hub.docker.com-springbuildmaster') {
-						docker.image('adoptopenjdk/openjdk8:latest').inside('-v $HOME:/tmp/jenkins-home') {
+						docker.image(p['docker.java.main.image']).inside(p['docker.java.inside.basic']) {
 							sh 'MAVEN_OPTS="-Duser.name=jenkins -Duser.home=/tmp/jenkins-home" ./mvnw -s settings.xml -Pci,artifactory ' +
 									'-Dartifactory.server=https://repo.spring.io ' +
 									"-Dartifactory.username=${ARTIFACTORY_USR} " +

ci/pipeline.properties

@@ -0,0 +1,24 @@
+# Java versions
+java.main.tag=8u312-b07-jdk
+java.next.tag=11.0.13_8-jdk
+java.lts.tag=17.0.1_12-jdk
+
+# Docker container images - standard
+docker.java.main.image=eclipse-temurin:${java.main.tag}
+docker.java.next.image=eclipse-temurin:${java.next.tag}
+docker.java.lts.image=eclipse-temurin:${java.lts.tag}
+
+# Supported versions of MongoDB
+docker.mongodb.4.0.version=4.0.23
+docker.mongodb.4.4.version=4.4.4
+docker.mongodb.5.0.version=5.0.3
+
+# Supported versions of Redis
+docker.redis.6.version=6.2.4
+
+# Supported versions of Cassandra
+docker.cassandra.3.version=3.11.10
+
+# Docker environment settings
+docker.java.inside.basic=-v $HOME:/tmp/jenkins-home
+docker.java.inside.docker=-u root -v /var/run/docker.sock:/var/run/docker.sock -v /usr/bin/docker:/usr/bin/docker -v $HOME:/tmp/jenkins-home