Flink backend implementation

.github/workflows/master.yml

@@ -110,6 +110,7 @@ jobs:
           name: unit-tests-log
           path: |
             **/target/unit-tests.log
+            **/kyuubi-flink-sql-engine.log*
             **/kyuubi-spark-sql-engine.log*
             **/target/scalastyle-output.xml
 

.github/workflows/nightly.yml

@@ -54,4 +54,5 @@ jobs:
           name: unit-tests-log
           path: |
             **/target/unit-tests.log
+            **/kyuubi-flink-sql-engine.log*
             **/kyuubi-spark-sql-engine.log*

build/dist

@@ -30,7 +30,7 @@ set -e
 KYUUBI_HOME="$(cd "`dirname "$0"`/.."; pwd)"
 DISTDIR="$KYUUBI_HOME/dist"
 MAKE_TGZ=false
-# TODO: add FLINK_PROVIDED option
+FLINK_PROVIDED=false
 SPARK_PROVIDED=false
 NAME=none
 MVN="$KYUUBI_HOME/build/mvn"
@@ -62,6 +62,9 @@ while (( "$#" )); do
     --tgz)
       MAKE_TGZ=true
       ;;
+    --flink-provided)
+      FLINK_PROVIDED=true
+      ;;
     --spark-provided)
       SPARK_PROVIDED=true
       ;;
@@ -124,6 +127,11 @@ SCALA_VERSION=$("$MVN" help:evaluate -Dexpression=scala.binary.version $@ 2>/dev
     | grep -v "WARNING"\
     | tail -n 1)
 
+FLINK_VERSION=$("$MVN" help:evaluate -Dexpression=flink.version $@ 2>/dev/null\
+    | grep -v "INFO"\
+    | grep -v "WARNING"\
+    | tail -n 1)
+
 SPARK_VERSION=$("$MVN" help:evaluate -Dexpression=spark.version $@ 2>/dev/null\
     | grep -v "INFO"\
     | grep -v "WARNING"\
@@ -144,7 +152,7 @@ HIVE_VERSION=$("$MVN" help:evaluate -Dexpression=hive.version $@ 2>/dev/null\
     | grep -v "WARNING"\
     | tail -n 1)
 
-echo "Building Kyuubi package of version $VERSION against Spark version - $SPARK_VERSION"
+echo "Building Kyuubi package of version $VERSION against Flink $FLINK_VERSION, Spark $SPARK_VERSION"
 
 SUFFIX="-$NAME"
 if [[ "$NAME" == "none" ]]; then
@@ -163,7 +171,7 @@ fi
 
 MVN_DIST_OPT="-DskipTests"
 if [[ "$SPARK_PROVIDED" == "true" ]]; then
-  MVN_DIST_OPT="$MVN_DIST_OPT -Pspark-provided"
+  MVN_DIST_OPT="$MVN_DIST_OPT -Pflink-provided,spark-provided"
 fi
 
 BUILD_COMMAND=("$MVN" clean install $MVN_DIST_OPT $@)
@@ -178,6 +186,8 @@ rm -rf "$DISTDIR"
 mkdir -p "$DISTDIR/pid"
 mkdir -p "$DISTDIR/logs"
 mkdir -p "$DISTDIR/work"
+mkdir -p "$DISTDIR/externals/engines/flink"
+mkdir -p "$DISTDIR/externals/engines/flink/lib"
 mkdir -p "$DISTDIR/externals/engines/spark"
 mkdir -p "$DISTDIR/beeline-jars"
 echo "Kyuubi $VERSION $GITREVSTRING built for" > "$DISTDIR/RELEASE"
@@ -204,6 +214,12 @@ for jar in $(ls "$DISTDIR/jars/"); do
 done
 cd -
 
+# Copy flink engines
+cp -r "$KYUUBI_HOME/externals/kyuubi-flink-sql-engine/bin/" "$DISTDIR/externals/engines/flink/bin/"
+chmod a+x "$DISTDIR/externals/engines/flink/bin/flink-sql-engine.sh"
+cp -r "$KYUUBI_HOME/externals/kyuubi-flink-sql-engine/conf/" "$DISTDIR/externals/engines/flink/conf/"
+cp "$KYUUBI_HOME/externals/kyuubi-flink-sql-engine/target/kyuubi-flink-sql-engine_${SCALA_VERSION}-${VERSION}.jar" "$DISTDIR/externals/engines/flink/lib"
+
 # Copy spark engines
 cp "$KYUUBI_HOME/externals/kyuubi-spark-sql-engine/target/kyuubi-spark-sql-engine_${SCALA_VERSION}-${VERSION}.jar" "$DISTDIR/externals/engines/spark"
 
@@ -224,6 +240,12 @@ for SPARK_EXTENSION_VERSION in ${SPARK_EXTENSION_VERSIONS[@]}; do
   fi
 done
 
+if [[ "$FLINK_PROVIDED" != "true" ]]; then
+  # Copy flink binary dist
+  cp -r "$KYUUBI_HOME/externals/kyuubi-download/target/flink-$FLINK_VERSION/" \
+        "$DISTDIR/externals/flink-$FLINK_VERSION/"
+fi
+
 if [[ "$SPARK_PROVIDED" != "true" ]]; then
   # Copy spark binary dist
   cp -r "$KYUUBI_HOME/externals/kyuubi-download/target/spark-$SPARK_VERSION-bin-hadoop${SPARK_HADOOP_VERSION}$HIVE_VERSION_SUFFIX/" \

docs/deployment/settings.md

@@ -300,6 +300,7 @@ kyuubi\.session\.check<br>\.interval|<div style='width: 65pt;word-wrap: break-wo
 kyuubi\.session\.conf<br>\.ignore\.list|<div style='width: 65pt;word-wrap: break-word;white-space: normal'></div>|<div style='width: 170pt;word-wrap: break-word;white-space: normal'>A comma separated list of ignored keys. If the client connection contains any of them, the key and the corresponding value will be removed silently during engine bootstrap and connection setup. Note that this rule is for server-side protection defined via administrators to prevent some essential configs from tampering but will not forbid users to set dynamic configurations via SET syntax.</div>|<div style='width: 30pt'>seq</div>|<div style='width: 20pt'>1.2.0</div>
 kyuubi\.session\.conf<br>\.restrict\.list|<div style='width: 65pt;word-wrap: break-word;white-space: normal'></div>|<div style='width: 170pt;word-wrap: break-word;white-space: normal'>A comma separated list of restricted keys. If the client connection contains any of them, the connection will be rejected explicitly during engine bootstrap and connection setup. Note that this rule is for server-side protection defined via administrators to prevent some essential configs from tampering but will not forbid users to set dynamic configurations via SET syntax.</div>|<div style='width: 30pt'>seq</div>|<div style='width: 20pt'>1.2.0</div>
 kyuubi\.session\.engine<br>\.check\.interval|<div style='width: 65pt;word-wrap: break-word;white-space: normal'>PT1M</div>|<div style='width: 170pt;word-wrap: break-word;white-space: normal'>The check interval for engine timeout</div>|<div style='width: 30pt'>duration</div>|<div style='width: 20pt'>1.0.0</div>
+kyuubi\.session\.engine<br>\.flink\.main\.resource|<div style='width: 65pt;word-wrap: break-word;white-space: normal'>&lt;undefined&gt;</div>|<div style='width: 170pt;word-wrap: break-word;white-space: normal'>The package used to create Flink SQL engine remote job. If it is undefined, Kyuubi will use the default</div>|<div style='width: 30pt'>string</div>|<div style='width: 20pt'>1.4.0</div>
 kyuubi\.session\.engine<br>\.idle\.timeout|<div style='width: 65pt;word-wrap: break-word;white-space: normal'>PT30M</div>|<div style='width: 170pt;word-wrap: break-word;white-space: normal'>engine timeout, the engine will self-terminate when it's not accessed for this duration. 0 or negative means not to self-terminate.</div>|<div style='width: 30pt'>duration</div>|<div style='width: 20pt'>1.0.0</div>
 kyuubi\.session\.engine<br>\.initialize\.timeout|<div style='width: 65pt;word-wrap: break-word;white-space: normal'>PT3M</div>|<div style='width: 170pt;word-wrap: break-word;white-space: normal'>Timeout for starting the background engine, e.g. SparkSQLEngine.</div>|<div style='width: 30pt'>duration</div>|<div style='width: 20pt'>1.0.0</div>
 kyuubi\.session\.engine<br>\.launch\.async|<div style='width: 65pt;word-wrap: break-word;white-space: normal'>true</div>|<div style='width: 170pt;word-wrap: break-word;white-space: normal'>When opening kyuubi session, whether to launch backend engine asynchronously. When true, the Kyuubi server will set up the connection with the client without delay as the backend engine will be created asynchronously.</div>|<div style='width: 30pt'>boolean</div>|<div style='width: 20pt'>1.4.0</div>

externals/kyuubi-flink-sql-engine/bin/flink-sql-engine.sh

@@ -0,0 +1,69 @@
+#!/usr/bin/env bash
+################################################################################
+#  Licensed to the Apache Software Foundation (ASF) under one
+#  or more contributor license agreements.  See the NOTICE file
+#  distributed with this work for additional information
+#  regarding copyright ownership.  The ASF licenses this file
+#  to you under the Apache License, Version 2.0 (the
+#  "License"); you may not use this file except in compliance
+#  with the License.  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+# limitations under the License.
+################################################################################
+
+################################################################################
+# Adopted from "flink" bash script
+################################################################################
+
+if [[ -z "$FLINK_HOME" || ! -d "$FLINK_HOME" ]]; then
+  (>&2 echo "Invalid FLINK_HOME: ${FLINK_HOME:-unset}")
+  exit 1
+fi
+
+FLINK_SQL_ENGINE_HOME="$(cd `dirname $0`/..; pwd)"
+if [[ "$FLINK_SQL_ENGINE_HOME" == "$KYUUBI_HOME/externals/engines/flink" ]]; then
+  FLINK_SQL_ENGINE_CONF_DIR="$FLINK_SQL_ENGINE_HOME/conf"
+  FLINK_SQL_ENGINE_LIB_DIR="$FLINK_SQL_ENGINE_HOME/lib"
+  FLINK_SQL_ENGINE_LOG_DIR="$KYUUBI_LOG_DIR"
+  FLINK_SQL_ENGINE_JAR=$(find "$FLINK_SQL_ENGINE_LIB_DIR" -regex ".*/kyuubi-flink-sql-engine_.*\.jar")
+  FLINK_HADOOP_CLASSPATH="$INTERNAL_HADOOP_CLASSPATHS"
+else
+  echo -e "\nFLINK_SQL_ENGINE_HOME $FLINK_SQL_ENGINE_HOME doesn't match production directory, assuming in development environment..."
+  FLINK_SQL_ENGINE_CONF_DIR="$FLINK_SQL_ENGINE_HOME/conf"
+  FLINK_SQL_ENGINE_LIB_DIR="$FLINK_SQL_ENGINE_HOME/target"
+  FLINK_SQL_ENGINE_LOG_DIR="$FLINK_SQL_ENGINE_HOME/target"
+  FLINK_SQL_ENGINE_JAR=$(find "$FLINK_SQL_ENGINE_LIB_DIR" -regex '.*/kyuubi-flink-sql-engine_.*\.jar$' | grep -v '\-javadoc.jar$' | grep -v '\-tests.jar$')
+  _FLINK_SQL_ENGINE_HADOOP_CLIENT_JARS=$(find $FLINK_SQL_ENGINE_LIB_DIR -regex '.*/hadoop-client-.*\.jar$' | tr '\n' ':')
+  FLINK_HADOOP_CLASSPATH="${_FLINK_SQL_ENGINE_HADOOP_CLIENT_JARS%:}"
+fi
+
+# do NOT let config.sh detect FLINK_HOME
+_FLINK_HOME_DETERMINED=1 . "$FLINK_HOME/bin/config.sh"
+
+FLINK_IDENT_STRING=${FLINK_IDENT_STRING:-"$USER"}
+FLINK_SQL_CLIENT_JAR=$(find "$FLINK_OPT_DIR" -regex ".*flink-sql-client.*.jar")
+CC_CLASSPATH=`constructFlinkClassPath`
+
+FULL_CLASSPATH="$FLINK_SQL_ENGINE_JAR:$FLINK_SQL_CLIENT_JAR:$CC_CLASSPATH:$FLINK_HADOOP_CLASSPATH"
+
+log_file="$FLINK_SQL_ENGINE_LOG_DIR/kyuubi-flink-sql-engine-$FLINK_IDENT_STRING-$HOSTNAME.log"
+log_setting=(
+  -Dlog.file="$log_file"
+  -Dlog4j.configurationFile=file:"$FLINK_SQL_ENGINE_CONF_DIR/log4j.properties"
+  -Dlog4j.configuration=file:"$FLINK_SQL_ENGINE_CONF_DIR/log4j.properties"
+  -Dlogback.configurationFile=file:"$FLINK_SQL_ENGINE_CONF_DIR/logback.xml"
+)
+
+if [ -n "$FLINK_SQL_ENGINE_JAR" ]; then
+  exec $JAVA_RUN ${FLINK_SQL_ENGINE_DYNAMIC_ARGS} "${log_setting[@]}" -cp ${FULL_CLASSPATH} \
+    org.apache.kyuubi.engine.flink.FlinkSQLEngine "$@"
+else
+  (>&2 echo "[ERROR] Flink SQL Engine JAR file 'kyuubi-flink-sql-engine*.jar' should be located in $FLINK_SQL_ENGINE_LIB_DIR.")
+  exit 1
+fi

externals/kyuubi-flink-sql-engine/conf/log4j.properties

@@ -0,0 +1,43 @@
+################################################################################
+#  Licensed to the Apache Software Foundation (ASF) under one
+#  or more contributor license agreements.  See the NOTICE file
+#  distributed with this work for additional information
+#  regarding copyright ownership.  The ASF licenses this file
+#  to you under the Apache License, Version 2.0 (the
+#  "License"); you may not use this file except in compliance
+#  with the License.  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+# limitations under the License.
+################################################################################
+
+# This affects logging for both kyuubi-flink-sql-engine and Flink
+log4j.rootLogger=INFO, CA
+
+#Console Appender
+log4j.appender.CA=org.apache.log4j.ConsoleAppender
+log4j.appender.CA.layout=org.apache.log4j.PatternLayout
+log4j.appender.CA.layout.ConversionPattern=%d{HH:mm:ss.SSS} %p %c: %m%n
+log4j.appender.CA.Threshold = FATAL
+
+# Log all infos in the given file
+log4j.appender.file=org.apache.log4j.FileAppender
+log4j.appender.file.file=${log.file}
+log4j.appender.file.append=false
+log4j.appender.file.layout=org.apache.log4j.PatternLayout
+log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n
+
+#File Appender
+log4j.appender.FA=org.apache.log4j.FileAppender
+log4j.appender.FA.append=false
+log4j.appender.FA.file=target/unit-tests.log
+log4j.appender.FA.layout=org.apache.log4j.PatternLayout
+log4j.appender.FA.layout.ConversionPattern=%d{HH:mm:ss.SSS} %t %p %c{2}: %m%n
+
+# Set the logger level of File Appender to DEBUG
+log4j.appender.FA.Threshold = DEBUG

externals/kyuubi-flink-sql-engine/conf/logback.xml

@@ -0,0 +1,32 @@
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one
+  ~ or more contributor license agreements.  See the NOTICE file
+  ~ distributed with this work for additional information
+  ~ regarding copyright ownership.  The ASF licenses this file
+  ~ to you under the Apache License, Version 2.0 (the
+  ~ "License"); you may not use this file except in compliance
+  ~ with the License.  You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<configuration>
+    <appender name="file" class="ch.qos.logback.core.FileAppender">
+        <file>${log.file}</file>
+        <append>false</append>
+        <encoder>
+            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{60} %X{sourceThread} - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <!-- # This affects logging for both kyuubi-flink-sql-engine and Flink -->
+    <root level="INFO">
+        <appender-ref ref="file"/>
+    </root>
+</configuration>

externals/kyuubi-flink-sql-engine/pom.xml

@@ -147,4 +147,116 @@
     </dependency>
   </dependencies>
 
+  <build>
+    <outputDirectory>target/scala-${scala.binary.version}/classes</outputDirectory>
+    <testOutputDirectory>target/scala-${scala.binary.version}/test-classes</testOutputDirectory>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-shade-plugin</artifactId>
+        <configuration>
+          <shadedArtifactAttached>false</shadedArtifactAttached>
+          <artifactSet>
+            <includes>
+              <include>org.apache.kyuubi:kyuubi-common_${scala.binary.version}</include>
+              <include>org.apache.kyuubi:kyuubi-ha_${scala.binary.version}</include>
+              <include>com.fasterxml.jackson.core:*</include>
+              <include>com.fasterxml.jackson.module:*</include>
+              <include>com.google.guava:failureaccess</include>
+              <include>com.google.guava:guava</include>
+              <include>commons-codec:commons-codec</include>
+              <include>io.netty:netty-all</include>
+              <include>org.apache.commons:commons-lang3</include>
+              <include>org.apache.curator:curator-client</include>
+              <include>org.apache.curator:curator-framework</include>
+              <include>org.apache.curator:curator-recipes</include>\
+              <include>org.apache.hive:hive-service-rpc</include>
+              <include>org.apache.thrift:*</include>
+              <include>org.apache.zookeeper:*</include>
+            </includes>
+          </artifactSet>
+          <relocations>
+            <relocation>
+              <pattern>com.fasterxml.jackson</pattern>
+              <shadedPattern>${kyuubi.shade.packageName}.com.fasterxml.jackson</shadedPattern>
+              <includes>
+                <include>com.fasterxml.jackson.**</include>
+              </includes>
+            </relocation>
+            <relocation>
+              <pattern>org.apache.curator</pattern>
+              <shadedPattern>${kyuubi.shade.packageName}.org.apache.curator</shadedPattern>
+              <includes>
+                <include>org.apache.curator.**</include>
+              </includes>
+            </relocation>
+            <relocation>
+              <pattern>com.google.common</pattern>
+              <shadedPattern>${kyuubi.shade.packageName}.com.google.common</shadedPattern>
+              <includes>
+                <include>com.google.common.**</include>
+              </includes>
+            </relocation>
+            <relocation>
+              <pattern>org.apache.commons</pattern>
+              <shadedPattern>${kyuubi.shade.packageName}.org.apache.commons</shadedPattern>
+              <includes>
+                <include>org.apache.commons.**</include>
+              </includes>
+            </relocation>
+            <relocation>
+              <pattern>io.netty</pattern>
+              <shadedPattern>${kyuubi.shade.packageName}.io.netty</shadedPattern>
+              <includes>
+                <include>io.netty.**</include>
+              </includes>
+            </relocation>
+            <relocation>
+              <pattern>org.apache.hive.service.rpc.thrift</pattern>
+              <shadedPattern>${kyuubi.shade.packageName}.org.apache.hive.service.rpc.thrift</shadedPattern>
+              <includes>
+                <include>org.apache.hive.service.rpc.thrift.**</include>
+              </includes>
+            </relocation>
+            <relocation>
+              <pattern>org.apache.thrift</pattern>
+              <shadedPattern>${kyuubi.shade.packageName}.org.apache.thrift</shadedPattern>
+              <includes>
+                <include>org.apache.thrift.**</include>
+              </includes>
+            </relocation>
+            <relocation>
+              <pattern>org.apache.zookeeper</pattern>
+              <shadedPattern>${kyuubi.shade.packageName}.org.apache.zookeeper</shadedPattern>
+              <includes>
+                <include>org.apache.zookeeper.**</include>
+              </includes>
+            </relocation>
+          </relocations>
+        </configuration>
+        <executions>
+          <execution>
+            <phase>package</phase>
+            <goals>
+              <goal>shade</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+        <executions>
+          <execution>
+            <id>prepare-test-jar</id>
+            <phase>test-compile</phase>
+            <goals>
+              <goal>test-jar</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
 </project>