flink-ai-extended

This project is to extend deep learning framework on the Flink project. Currently supports tensorflow running on flink.

contents

TensorFlow support
Structure
For More Information
License

TensorFlow support

TensorFlow is a deep learning system developed by Google and open source, which is widely used in the field of deep learning. There are many inconveniences in distributed use and resource management of native TensorFlow, but it can not integrate with the existing widely used large data processing framework.

Flink is a data processing framework. It is widely used in data extraction, feature preprocessing and data cleaning.

This project combines TensorFlow with Flink and provides users with more convenient and useful tools. Currently, Flink job code uses java language and the algorithm code uses python language.

Support Version

TensorFlow: 1.11.0

Flink: 1.8.0

Quick Start

Setup

Requirements

python: 2.7 future support python 3
pip
cmake >= 3.6
java 1.8
maven >=3.3.0

Install python2

macOS

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
export PATH="/usr/local/bin:/usr/local/sbin:$PATH"
brew install python@2

Ubuntu

sudo apt install python-dev

Install pip

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python get-pip.py

Ubuntu you can install with command:

sudo apt install python-pip

Install pip dependencies Install the pip package dependencies (if using a virtual environment, omit the --user argument):

pip install -U --user pip six numpy wheel mock grpcio grpcio-tools

Install cmake

cmake version must >= 3.6

cmake download page

Install java 8

java download page

Install maven

maven version >=3.3.0

download maven page

tar -xvf apache-maven-3.6.1-bin.tar.gz
mv -rf apache-maven-3.6.1 /usr/local/

configuration environment variables

MAVEN_HOME=/usr/local/apache-maven-3.6.1
export MAVEN_HOME
export PATH=${PATH}:${MAVEN_HOME}/bin

Build From Source

Compiling source code depends on tensorflow 1.11.0. Compiling commands will automatically install tensorflow 1.11.0

mvn -DskipTests=true clean install

If you run all tests, this step may take a long time, about 20 minutes, and wait patiently. You can also skip the test run command: mvn -DskipTests=true clean install

Optional Commands

# run all tests
mvn clean install

# skip unit tests
mvn -DskipUTs=true clean install

# skip integration tests
mvn -DskipITs=true clean install

If the above command is executed successfully, congratulations on your successful deployment of flink-ai-extended. Now you can write algorithm programs.

Build Source in virtual environment

change project pom.xml item pip.install.option from --user to -U
create virtual environment:

virtualenv tfenv

enter the virtual environment

source tfenv/bin/activate

install pip dependencies

pip install -U pip six numpy wheel mock grpcio grpcio-tools

build source

mvn clean install

exit from virtual environment

deactivate

Example

tensorflow add example python code:

import tensorflow as tf
import time
import sys
from flink_ml_tensorflow.tensorflow_context import TFContext

def build_graph():
    global a
    i = 1
    a = tf.placeholder(tf.float32, shape=None, name="a")
    b = tf.reduce_mean(a, name="b")
    r_list = []
    v = tf.Variable(dtype=tf.float32, initial_value=tf.constant(1.0), name="v_" + str(i))
    c = tf.add(b, v, name="c_" + str(i))
    add = tf.assign(v, c, name="assign_" + str(i))
    sum = tf.summary.scalar(name="sum_" + str(i), tensor=c)
    r_list.append(add)
    global_step = tf.contrib.framework.get_or_create_global_step()
    global_step_inc = tf.assign_add(global_step, 1)
    r_list.append(global_step_inc)
    return r_list
    
def map_func(context):
    tf_context = TFContext(context)
    job_name = tf_context.get_role_name()
    index = tf_context.get_index()
    cluster_json = tf_context.get_tf_cluster()
    
    cluster = tf.train.ClusterSpec(cluster=cluster_json)
    server = tf.train.Server(cluster, job_name=job_name, task_index=index)
    sess_config = tf.ConfigProto(allow_soft_placement=True, log_device_placement=False,
                                 device_filters=["/job:ps", "/job:worker/task:%d" % index])
    t = time.time()
    if 'ps' == job_name:
        from time import sleep
        while True:
            sleep(1)
    else:
        with tf.device(tf.train.replica_device_setter(worker_device='/job:worker/task:' + str(index), cluster=cluster)):
            train_ops = build_graph()
            hooks = [tf.train.StopAtStepHook(last_step=2)]
            with tf.train.MonitoredTrainingSession(master=server.target, config=sess_config,
                                                    checkpoint_dir="./target/tmp/s1/" + str(t),
                                                    hooks=hooks) as mon_sess:
                while not mon_sess.should_stop():
                    print (mon_sess.run(train_ops, feed_dict={a: [1.0, 2.0, 3.0]}))
                    sys.stdout.flush()

java code:

add maven dependencies

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.alibaba</groupId>
    <artifactId>flink-ai-extended-examples</artifactId>
    <version>0.1.0</version>
    <packaging>jar</packaging>
    <dependencies>
        <dependency>
            <groupId>com.alibaba.flink.ml</groupId>
            <artifactId>flink-ml-tensorflow</artifactId>
            <version>0.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>2.7.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-test</artifactId>
            <version>2.7.1</version>
            <exclusions>
                <exclusion>
                    <groupId>com.google.guava</groupId>
                    <artifactId>guava</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>20.0</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

You can refer to the following POM

example pom.xml

class Add{
    public static void main(String args[]) throws Exception{ 
    	// local zookeeper server.
        TestingServer server = new TestingServer(2181, true);
        String script = "./add.py";
        StreamExecutionEnvironment streamEnv = StreamExecutionEnvironment.getExecutionEnvironment();
        // if zookeeper has other address
        Map<String, String> prop = new HashMap<>();
        prop.put(MLConstants.CONFIG_STORAGE_TYPE, MLConstants.STORAGE_ZOOKEEPER);
        prop.put(MLConstants.CONFIG_ZOOKEEPER_CONNECT_STR, "localhost:2181");
        TFConfig config = new TFConfig(2, 1, prop, script, "map_func", null);
        TFUtils.train(streamEnv, null, config);
        JobExecutionResult result = streamEnv.execute();
        server.stop();
    } 
}

Distributed Running

Deployment

Distributed running environment:

Start zookeeper service https://zookeeper.apache.org/
Prepare python virtual environment: virtual environment workflow is shown in the following figure:

Build python virtual environment package.
Put virtual environment package to a share file system such as HDFS.
Configure the virtual environment package address in build Flink machine learning job configuration (TensorFlow:TFConfig, PyTorch:PyTorchConfig).
When running Flink job, each node downloads the virtual environment package and extracts it locally

[build docker script]

[build virtual environment script]

Prepare Flink Cluster

Running Distributed Programs

Developing Algorithmic Program

TensorFlow

PyTorch
Developing Flink Job Program

TensorFlow Train

PyTorch Run
Submit Flink job

Submit flink job

Distributed Running Example

Setup & Build

install docker

docker install

install flink-ai-extended

mvn -DskipTests=true clean install

Change work dir

cd docker/build_cluster/

Pay attention: projectRoot is flink-ai-extended project root path.

Build Docker Image [build docker script]

sh  build_flink_image.sh

You can find flink image to use command:

docker images

Build Virtual Environment [build virtual environment script]

sh build_venv_package.sh

You can find tfenv.zip in temp/test/ directory.

Start Service

start zookeeper
start hdfs
start flink cluster

Start zookeeper

[start zookeeper script]

sh start_zookeeper.sh

Start HDFS

[start hdfs script]

sh start_hdfs.sh

Start flink cluster

[start flink cluster script]

sh start_flink.sh

Also can start all service

[start service script]

sh start_cluster.sh

Prepare data & code

Copy virtual environment package to hdfs

docker exec flink-jm /opt/hadoop-2.7.0/bin/hadoop fs -put -f /opt/work_home/temp/test/tfenv.zip /user/root/tfenv.zip

Download mnist data

sh download_mnist_data.sh

Put train data to docker container

docker cp ${projectRoot}/flink-ml-examples/target/data/ flink-jm:/tmp/mnist_input

Package user python code

cd ${projectRoot}/flink-ml-examples/target/
mkdir code && cp ${projectRoot}/flink-ml-examples/src/test/python/* code/
zip -r ${projectRoot}/flink-ml-examples/target/code.zip code

Put code package to hdfs

docker exec flink-jm /opt/hadoop-2.7.0/bin/hadoop fs -put -f /opt/work_home/flink-ml-examples/target/code.zip hdfs://minidfs:9000/user/root/

Submit train job

docker exec flink-jm flink run  -c com.alibaba.flink.ml.examples.tensorflow.mnist.MnistDist /opt/work_home/flink-ml-examples/target/flink-ml-examples-0.1.0.jar --zk-conn-str minizk --mode StreamEnv --setup /opt/work_home/flink-ml-examples/src/test/python/mnist_data_setup.py --train mnist_dist.py --envpath hdfs://minidfs:9000/user/root/tfenv.zip --mnist-files /tmp/mnist_input --with-restart false --code-path hdfs://minidfs:9000/user/root/code.zip

Visit Flink Cluster

Flink Cluster Address

Stop all docker containers

[stop all script]

sh stop_cluster.sh

Summary

In the example above, zookeeper, flink, and HDFS can be deployed on different machines.

You can also use existing zookeeper, hdfs, flink cluster.

Optional Tools

Build framework and tensorflow python package Independently

build script

run build_wheel.sh script, you will find python package in dist dir. you can install the package with commend:

pip install --user $package_path

Build custom virtual environment package

running distributed programs you need a virtual environment package to upload to hdfs.

build virtual environment script

you can change the script to add some extended python package.

Structure

AM registers its address to zookeeper.
Worker and Ps get AM address from zookeeper.
Worker and Ps register their address to AM.
AM collect all Worker and Ps address.
Worker and Ps get cluster information.
Worker and Ps start algorithm python process.

For More Information

Design document

License

Apache License 2.0

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