這幾天在做數據轉移，打算把mysql上的數據都轉移到cassandra上，遇到不少坑。稍微記錄下。首先是環境配置，我是把spark 裝在/opt/目錄下的。
#install spark
sudo mkdir /opt/spark
wget http://ftp.jaist.ac.jp/pub/apache/spark/spark-2.2.1/spark-2.2.1-bin-hadoop2.7.tgz | sudo tar xvz -C /opt/
sudo mv /opt/spark-2.2.1-bin-hadoop2.7/* /opt/spark/
sudo rm -rf /opt/spark-2.2.1-bin-hadoop2.7/
#install cassandra
echo "deb http://www.apache.org/dist/cassandra/debian 311x main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list
sudo curl https://www.apache.org/dist/cassandra/KEYS | sudo apt-key add -
sudo apt-get update
sudo apt-get install cassandra
sudo chmod -R 777 /var/log/cassandra/
sudo chmod -R 777 /var/lib/cassandra/
# install spark extra libs
wget http://central.maven.org/maven2/com/twitter/jsr166e/1.1.0/jsr166e-1.1.0.jar
sudo mv jsr166e-1.1.0.jar /opt/spark/jars/
wget http://central.maven.org/maven2/com/datastax/spark/spark-cassandra-connector_2.11/2.0.7/spark-cassandra-connector_2.11-2.0.7.jar
sudo mv spark-cassandra-connector_2.11-2.0.7.jar /opt/spark/jars/
這裏也可以不把這些庫裝在這裏，submit 時候提交這些jar也是ok的，如果你不是只在本機運算的話，請一定在submit的時候添加你用的庫。
之後是在intellij裏新建maven project, scala更新到了2.12,但是其他庫目前只支持到2.11.8, 所以還是裝的2.11.8. pom裏一定要加上mavern-shade-plugin, intellij自帶的打包總是會遇到一些classnotfound exception, pom 文件我也貼出來了。
<?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>your groupID</groupId>
<artifactId>your arifactID</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<encoding>UTF-8</encoding>
<scala.version>2.11.8</scala.version>
<scala.compat.version>2.11</scala.compat.version>
</properties>
<dependencies>
<!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>15.0</version>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.11</artifactId>
<version>2.2.1</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.11</artifactId>
<version>2.2.1</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
</dependency>
<dependency>
<groupId>org.clapper</groupId>
<artifactId>grizzled-slf4j_2.11</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>2.11.8</version>
</dependency>
<dependency>
<groupId>com.datastax.cassandra</groupId>
<artifactId>cassandra-driver-core</artifactId>
<version>3.4.0</version>
</dependency>
<dependency>
<groupId>com.datastax.spark</groupId>
<artifactId>spark-cassandra-connector_2.11</artifactId>
<version>2.0.7</version>
</dependency>
</dependencies>
<build>
<sourceDirectory>src/main/scala</sourceDirectory>
<testSourceDirectory>src/test/scala</testSourceDirectory>
<plugins>
<plugin>
<!-- see http://davidb.github.com/scala-maven-plugin -->
<groupId>net.alchim31.maven</groupId>
<artifactId>scala-maven-plugin</artifactId>
<version>3.3.1</version>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>testCompile</goal>
</goals>
<configuration>
<args>
<arg>-feature</arg>
<arg>-deprecation</arg>
<arg>-dependencyfile</arg>
<arg>${project.build.directory}/.scala_dependencies</arg>
</args>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.18.1</version>
<configuration>
<useFile>false</useFile>
<disableXmlReport>true</disableXmlReport>
<!-- If you have classpath issue like NoDefClassError,... -->
<!-- useManifestOnlyJar>false</useManifestOnlyJar -->
<includes>
<include>**/*Test.*</include>
<include>**/*Suite.*</include>
</includes>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.5.0</version>
<executions>
<execution>
<id>run-local</id>
<goals>
<goal>exec</goal>
</goals>
<configuration>
<executable>spark-submit</executable>
<arguments>
<argument>--master</argument>
<argument>local</argument>
<argument>${project.build.directory}/${project.artifactId}-${project.version}-uber.jar</argument>
</arguments>
</configuration>
</execution>
<execution>
<id>run-yarn</id>
<goals>
<goal>exec</goal>
</goals>
<configuration>
<environmentVariables>
<HADOOP_CONF_DIR>
${basedir}/spark-remote/conf
</HADOOP_CONF_DIR>
</environmentVariables>
<executable>spark-submit</executable>
<arguments>
<argument>--master</argument>
<argument>yarn</argument>
<argument>${project.build.directory}/${project.artifactId}-${project.version}-uber.jar</argument>
</arguments>
</configuration>
</execution>
</executions>
</plugin>
<!-- Use the shade plugin to remove all the provided artifacts (such as spark itself) from the uber jar -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.1.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<!-- Remove signed keys to prevent security exceptions on uber jar -->
<!-- See https://stackoverflow.com/a/6743609/7245239 -->
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<manifestEntries>
<Main-Class>net.martinprobson.spark.spark_example.SparkTest</Main-Class>
</manifestEntries>
</transformer>
</transformers>
<artifactSet>
<excludes>
<exclude>javax.servlet:*</exclude>
<exclude>org.apache.hadoop:*</exclude>
<exclude>org.apache.maven.plugins:*</exclude>
<exclude>org.apache.spark:*</exclude>
<exclude>org.apache.avro:*</exclude>
<exclude>org.apache.parquet:*</exclude>
<exclude>org.scala-lang:*</exclude>
</excludes>
</artifactSet>
<finalName>${project.artifactId}-${project.version}-uber</finalName>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
之後做個簡單的讀取和寫入測試就行， 寫完code用mvn packge 命令打包，生成的jar在target文件夾下， 然後用spark-submit提交。
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