[FLINK-17375] Refactor travis_watchdog.sh into separate ci/ and azure…

…-pipelines/ scripts.

The guiding principle in this refactoring was to put everything generic (independent
of concrete CI system (such as Travis or Azure)) into tools/ci/*
and the scripts specific to a CI system (currently Azure) into tools/azure-pipelines/*.

.github/PULL_REQUEST_TEMPLATE.md

@@ -12,7 +12,7 @@
 
   - Fill out the template below to describe the changes contributed by the pull request. That will give reviewers the context they need to do the review.
   
-  - Make sure that the change passes the automated tests, i.e., `mvn clean verify` passes. You can set up Travis CI to do that following [this guide](https://flink.apache.org/contributing/contribute-code.html#open-a-pull-request).
+  - Make sure that the change passes the automated tests, i.e., `mvn clean verify` passes. You can set up Azure Pipelines CI to do that following [this guide](https://cwiki.apache.org/confluence/display/FLINK/Azure+Pipelines#AzurePipelines-Tutorial:SettingupAzurePipelinesforaforkoftheFlinkrepository).
 
   - Each pull request should address only one issue, not mix up code from multiple issues.
   

azure-pipelines.yml

@@ -48,10 +48,11 @@ resources:
 #   to understand why the secrets are handled like this
 variables:
   MAVEN_CACHE_FOLDER: $(Pipeline.Workspace)/.m2/repository
+  E2E_CACHE_FOLDER: $(Pipeline.Workspace)/e2e_cache
   MAVEN_OPTS: '-Dmaven.repo.local=$(MAVEN_CACHE_FOLDER)'
   CACHE_KEY: maven | $(Agent.OS) | **/pom.xml, !**/target/**
   CACHE_FALLBACK_KEY: maven | $(Agent.OS)
-  CACHE_FLINK_DIR: $(Pipeline.Workspace)/flink_cache
+  FLINK_ARTIFACT_DIR: $(Pipeline.Workspace)/flink_artifact
   SECRET_S3_BUCKET: $[variables.IT_CASE_S3_BUCKET]
   SECRET_S3_ACCESS_KEY: $[variables.IT_CASE_S3_ACCESS_KEY]
   SECRET_S3_SECRET_KEY: $[variables.IT_CASE_S3_SECRET_KEY]

flink-end-to-end-tests/run-nightly-tests.sh

@@ -45,7 +45,7 @@ if [ ! -z "$TF_BUILD" ] ; then
 		echo "COMPRESSING build artifacts."
 		COMPRESSED_ARCHIVE=${BUILD_BUILDNUMBER}.tgz
 		mkdir compressed-archive-dir
-		tar -zcvf compressed-archive-dir/${COMPRESSED_ARCHIVE} $ARTIFACTS_DIR
+		tar -zcvf compressed-archive-dir/${COMPRESSED_ARCHIVE} -C $ARTIFACTS_DIR .
 		echo "##vso[task.setvariable variable=ARTIFACT_DIR]$(pwd)/compressed-archive-dir"
 	}
 	on_exit compress_logs
@@ -235,15 +235,15 @@ printf "Running Java end-to-end tests\n"
 printf "==============================================================================\n"
 
 
-LOG4J_PROPERTIES=${END_TO_END_DIR}/../tools/ci/log4j-ci.properties
+LOG4J_PROPERTIES=${END_TO_END_DIR}/../tools/ci/log4j.properties
 
 MVN_LOGGING_OPTIONS="-Dlog.dir=${ARTIFACTS_DIR} -DlogBackupDir=${ARTIFACTS_DIR} -Dlog4j.configurationFile=file://$LOG4J_PROPERTIES"
 MVN_COMMON_OPTIONS="-Dflink.forkCount=2 -Dflink.forkCountTestPackage=2 -Dfast -Pskip-webui-build"
 e2e_modules=$(find flink-end-to-end-tests -mindepth 2 -maxdepth 5 -name 'pom.xml' -printf '%h\n' | sort -u | tr '\n' ',')
 e2e_modules="${e2e_modules},$(find flink-walkthroughs -mindepth 2 -maxdepth 2 -name 'pom.xml' -printf '%h\n' | sort -u | tr '\n' ',')"
 
 PROFILE="$PROFILE -Pe2e-travis1 -Pe2e-travis2 -Pe2e-travis3 -Pe2e-travis4 -Pe2e-travis5 -Pe2e-travis6"
-run_mvn ${MVN_COMMON_OPTIONS} ${MVN_LOGGING_OPTIONS} ${PROFILE} verify -pl ${e2e_modules} -DdistDir=$(readlink -e build-target)
+run_mvn ${MVN_COMMON_OPTIONS} ${MVN_LOGGING_OPTIONS} ${PROFILE} verify -pl ${e2e_modules} -DdistDir=$(readlink -e build-target) -Dcache-dir=$E2E_CACHE_FOLDER -Dcache-ttl=P1M
 
 EXIT_CODE=$?
 

flink-yarn-tests/src/test/java/org/apache/flink/yarn/YarnTestBase.java

@@ -449,7 +449,7 @@ public boolean accept(File dir, String name) {
 							}
 
 							if (!whitelistedFound) {
-								// logging in FATAL to see the actual message in TRAVIS tests.
+								// logging in FATAL to see the actual message in CI tests.
 								Marker fatal = MarkerFactory.getMarker("FATAL");
 								LOG.error(fatal, "Prohibited String '{}' in '{}:{}'", aProhibited, f.getAbsolutePath(), lineFromFile);
 
@@ -1048,10 +1048,10 @@ public static void teardown() throws Exception {
 			hdfsSiteXML.delete();
 		}
 
-		// When we are on travis, we copy the temp files of JUnit (containing the MiniYARNCluster log files)
+		// When we are on CI, we copy the temp files of JUnit (containing the MiniYARNCluster log files)
 		// to <flinkRoot>/target/flink-yarn-tests-*.
 		// The files from there are picked up by the tools/ci/* scripts to upload them.
-		if (isOnTravis()) {
+		if (isOnCI()) {
 			File target = new File("../target" + YARN_CONFIGURATION.get(TEST_CLUSTER_NAME_KEY));
 			if (!target.mkdirs()) {
 				LOG.warn("Error creating dirs to {}", target);
@@ -1067,8 +1067,8 @@ public static void teardown() throws Exception {
 
 	}
 
-	public static boolean isOnTravis() {
-		return System.getenv("TRAVIS") != null && System.getenv("TRAVIS").equals("true");
+	public static boolean isOnCI() {
+		return System.getenv("IS_CI") != null && System.getenv("IS_CI").equals("true");
 	}
 
 	protected void waitApplicationFinishedElseKillIt(

tools/azure-pipelines/build-apache-repo.yml

@@ -42,10 +42,11 @@ resources:
 
 variables:
   MAVEN_CACHE_FOLDER: $(Pipeline.Workspace)/.m2/repository
+  E2E_CACHE_FOLDER: $(Pipeline.Workspace)/e2e_cache
   MAVEN_OPTS: '-Dmaven.repo.local=$(MAVEN_CACHE_FOLDER)'
   CACHE_KEY: maven | $(Agent.OS) | **/pom.xml, !**/target/**
   CACHE_FALLBACK_KEY: maven | $(Agent.OS)
-  CACHE_FLINK_DIR: $(Pipeline.Workspace)/flink_cache
+  FLINK_ARTIFACT_DIR: $(Pipeline.Workspace)/flink_artifact
   SECRET_S3_BUCKET: $[variables.IT_CASE_S3_BUCKET]
   SECRET_S3_ACCESS_KEY: $[variables.IT_CASE_S3_ACCESS_KEY]
   SECRET_S3_SECRET_KEY: $[variables.IT_CASE_S3_SECRET_KEY]

tools/azure-pipelines/build-python-wheels.yml

@@ -22,8 +22,10 @@ jobs:
       clean: all
     steps:
       # Compile
-      - script: STAGE=compile ${{parameters.environment}} ./tools/azure-pipelines/azure_controller.sh compile
-        displayName: Build
+      - script: |
+          ${{parameters.environment}} ./tools/ci/compile.sh
+          ./tools/azure-pipelines/create_build_artifact.sh
+        displayName: Compile
 
       - script: |
           VERSION=$(mvn --file pom.xml org.apache.maven.plugins:maven-help-plugin:3.1.0:evaluate -Dexpression=project.version -q -DforceStdout)
@@ -38,8 +40,8 @@ jobs:
       # upload artifacts for building wheels
       - task: PublishPipelineArtifact@1
         inputs:
-          targetPath: $(Pipeline.Workspace)/flink.tar.gz
-          artifactName: FlinkCompileCacheDir-${{parameters.stage_name}}
+          path: $(FLINK_ARTIFACT_DIR)
+          artifact: FlinkCompileArtifact-${{parameters.stage_name}}
 
   - job: build_wheels
     dependsOn: compile_${{parameters.stage_name}}
@@ -58,7 +60,7 @@ jobs:
       - task: DownloadPipelineArtifact@2
         inputs:
           path: $(Pipeline.Workspace)
-          artifact: FlinkCompileCacheDir-${{parameters.stage_name}}
+          artifact: FlinkCompileArtifact-${{parameters.stage_name}}
       - script: |
           tar zxf $(Pipeline.Workspace)/flink.tar.gz -C $(Pipeline.Workspace)
           mkdir -p flink-dist/target/flink-$(VERSION)-bin