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Spark学习之路 （二）Spark2.3 HA集群的分布式安装

Spark Spark 2019/06/02

** Spark学习之路 （二）Spark2.3 HA集群的分布式安装：** <Excerpt in index | 首页摘要>

​ Spark学习之路 （二）Spark2.3 HA集群的分布式安装

<The rest of contents | 余下全文>

一、下载Spark安装包

1、从官网下载

http://spark.apache.org/downloads.html

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二、安装基础

1、Java8安装成功

2、Zookeeper安装成功

3、hadoop2.7.5 HA安装成功

4、Scala安装成功（不安装进程也可以启动）

三、Spark安装过程

1、上传并解压缩

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[hadoop@hadoop1 ~]$ ls
apps     data      exam        inithive.conf  movie     spark-2.3.0-bin-hadoop2.7.tgz  udf.jar
cookies  data.txt  executions  json.txt       projects  student                        zookeeper.out
course   emp       hive.sql    log            sougou    temp
[hadoop@hadoop1 ~]$ tar -zxvf spark-2.3.0-bin-hadoop2.7.tgz -C apps/

2、为安装包创建一个软连接

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[hadoop@hadoop1 ~]$ cd apps/
[hadoop@hadoop1 apps]$ ls
hadoop-2.7.5  hbase-1.2.6  spark-2.3.0-bin-hadoop2.7  zookeeper-3.4.10  zookeeper.out
[hadoop@hadoop1 apps]$ ln -s spark-2.3.0-bin-hadoop2.7/ spark
[hadoop@hadoop1 apps]$ ll
总用量 36
drwxr-xr-x. 10 hadoop hadoop  4096 3月  23 20:29 hadoop-2.7.5
drwxrwxr-x.  7 hadoop hadoop  4096 3月  29 13:15 hbase-1.2.6
lrwxrwxrwx.  1 hadoop hadoop    26 4月  20 13:48 spark -> spark-2.3.0-bin-hadoop2.7/
drwxr-xr-x. 13 hadoop hadoop  4096 2月  23 03:42 spark-2.3.0-bin-hadoop2.7
drwxr-xr-x. 10 hadoop hadoop  4096 3月  23 2017 zookeeper-3.4.10
-rw-rw-r--.  1 hadoop hadoop 17559 3月  29 13:37 zookeeper.out
[hadoop@hadoop1 apps]$

3、进入spark/conf修改配置文件

（1）进入配置文件所在目录

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[hadoop@hadoop1 ~]$ cd apps/spark/conf/
[hadoop@hadoop1 conf]$ ll
总用量 36
-rw-r--r--. 1 hadoop hadoop  996 2月  23 03:42 docker.properties.template
-rw-r--r--. 1 hadoop hadoop 1105 2月  23 03:42 fairscheduler.xml.template
-rw-r--r--. 1 hadoop hadoop 2025 2月  23 03:42 log4j.properties.template
-rw-r--r--. 1 hadoop hadoop 7801 2月  23 03:42 metrics.properties.template
-rw-r--r--. 1 hadoop hadoop  865 2月  23 03:42 slaves.template
-rw-r--r--. 1 hadoop hadoop 1292 2月  23 03:42 spark-defaults.conf.template
-rwxr-xr-x. 1 hadoop hadoop 4221 2月  23 03:42 spark-env.sh.template
[hadoop@hadoop1 conf]$

（2）复制spark-env.sh.template并重命名为spark-env.sh，并在文件最后添加配置内容

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[hadoop@hadoop1 conf]$ cp spark-env.sh.template spark-env.sh
[hadoop@hadoop1 conf]$ vi spark-env.sh
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export JAVA_HOME=/usr/local/jdk1.8.0_73
#export SCALA_HOME=/usr/share/scala
export HADOOP_HOME=/home/hadoop/apps/hadoop-2.7.5
export HADOOP_CONF_DIR=/home/hadoop/apps/hadoop-2.7.5/etc/hadoop
export SPARK_WORKER_MEMORY=500m
export SPARK_WORKER_CORES=1
export SPARK_DAEMON_JAVA_OPTS="-Dspark.deploy.recoveryMode=ZOOKEEPER -Dspark.deploy.zookeeper.url=hadoop1:2181,hadoop2:2181,hadoop3:2181,hadoop4:2181 -Dspark.deploy.zookeeper.dir=/spark"

注：

#export SPARK_MASTER_IP=hadoop1 这个配置要注释掉。
集群搭建时配置的spark参数可能和现在的不一样，主要是考虑个人电脑配置问题，如果memory配置太大，机器运行很慢。
说明：
-Dspark.deploy.recoveryMode=ZOOKEEPER #说明整个集群状态是通过zookeeper来维护的，整个集群状态的恢复也是通过zookeeper来维护的。就是说用zookeeper做了spark的HA配置，Master(Active)挂掉的话，Master(standby)要想变成Master（Active）的话，Master(Standby)就要像zookeeper读取整个集群状态信息，然后进行恢复所有Worker和Driver的状态信息，和所有的Application状态信息；
-Dspark.deploy.zookeeper.url=hadoop1:2181,hadoop2:2181,hadoop3:2181,hadoop4:2181#将所有配置了zookeeper，并且在这台机器上有可能做master(Active)的机器都配置进来；（我用了4台，就配置了4台）

-Dspark.deploy.zookeeper.dir=/spark
这里的dir和zookeeper配置文件zoo.cfg中的dataDir的区别？？？
-Dspark.deploy.zookeeper.dir是保存spark的元数据，保存了spark的作业运行状态；
zookeeper会保存spark集群的所有的状态信息，包括所有的Workers信息，所有的Applactions信息，所有的Driver信息,如果集群

（3）复制slaves.template成slaves

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[hadoop@hadoop1 conf]$ cp slaves.template slaves
[hadoop@hadoop1 conf]$ vi slaves

添加如下内容

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hadoop1
hadoop2
hadoop3
hadoop4

（4）将安装包分发给其他节点

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[hadoop@hadoop1 ~]$ cd apps/
[hadoop@hadoop1 apps]$ scp -r spark-2.3.0-bin-hadoop2.7/ hadoop2:$PWD
[hadoop@hadoop1 apps]$ scp -r spark-2.3.0-bin-hadoop2.7/ hadoop3:$PWD
[hadoop@hadoop1 apps]$ scp -r spark-2.3.0-bin-hadoop2.7/ hadoop4:$PWD

创建软连接

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[hadoop@hadoop2 ~]$ cd apps/
[hadoop@hadoop2 apps]$ ls
hadoop-2.7.5  hbase-1.2.6  spark-2.3.0-bin-hadoop2.7  zookeeper-3.4.10
[hadoop@hadoop2 apps]$ ln -s spark-2.3.0-bin-hadoop2.7/ spark
[hadoop@hadoop2 apps]$ ll
总用量 16
drwxr-xr-x 10 hadoop hadoop 4096 3月  23 20:29 hadoop-2.7.5
drwxrwxr-x  7 hadoop hadoop 4096 3月  29 13:15 hbase-1.2.6
lrwxrwxrwx  1 hadoop hadoop   26 4月  20 19:26 spark -> spark-2.3.0-bin-hadoop2.7/
drwxr-xr-x 13 hadoop hadoop 4096 4月  20 19:24 spark-2.3.0-bin-hadoop2.7
drwxr-xr-x 10 hadoop hadoop 4096 3月  21 19:31 zookeeper-3.4.10
[hadoop@hadoop2 apps]$

4、配置环境变量

所有节点均要配置

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[hadoop@hadoop1 spark]$ vi ~/.bashrc 
#Spark
export SPARK_HOME=/home/hadoop/apps/spark
export PATH=$PATH:$SPARK_HOME/bin

保存并使其立即生效

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[hadoop@hadoop1 spark]$ source ~/.bashrc

四、启动

1、先启动zookeeper集群

所有节点均要执行

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[hadoop@hadoop1 ~]$ zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /home/hadoop/apps/zookeeper-3.4.10/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[hadoop@hadoop1 ~]$ zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/hadoop/apps/zookeeper-3.4.10/bin/../conf/zoo.cfg
Mode: follower
[hadoop@hadoop1 ~]$

2、在启动HDFS集群

任意一个节点执行即可

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[hadoop@hadoop1 ~]$ start-dfs.sh

3、在启动Spark集群

在一个节点上执行

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[hadoop@hadoop1 ~]$ cd apps/spark/sbin/
[hadoop@hadoop1 sbin]$ start-all.sh

4、查看进程

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5、问题

查看进程发现spark集群只有hadoop1成功启动了Master进程，其他3个节点均没有启动成功，需要手动启动，进入到/home/hadoop/apps/spark/sbin目录下执行以下命令，3个节点都要执行

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[hadoop@hadoop2 ~]$ cd ~/apps/spark/sbin/
[hadoop@hadoop2 sbin]$ start-master.sh

6、执行之后再次查看进程

Master进程和Worker进程都以启动成功

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五、验证

1、查看Web界面Master状态

hadoop1是ALIVE状态，hadoop2、hadoop3和hadoop4均是STANDBY状态

hadoop1节点

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hadoop2节点

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hadoop3

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hadoop4

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2、验证HA的高可用

手动干掉hadoop1上面的Master进程，观察是否会自动进行切换

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干掉hadoop1上的Master进程之后，再次查看web界面

hadoo1节点，由于Master进程被干掉，所以界面无法访问

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hadoop2节点，Master被干掉之后，hadoop2节点上的Master成功篡位成功，成为ALIVE状态

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hadoop3节点

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hadoop4节点

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1、执行第一个Spark程序

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[hadoop@hadoop3 ~]$ /home/hadoop/apps/spark/bin/spark-submit \
> --class org.apache.spark.examples.SparkPi \
> --master spark://hadoop1:7077 \
> --executor-memory 500m \
> --total-executor-cores 1 \
> /home/hadoop/apps/spark/examples/jars/spark-examples_2.11-2.3.0.jar \
> 100

其中的spark://hadoop1:7077是下图中的地址

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运行结果

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2、启动spark shell

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[hadoop@hadoop1 ~]$ /home/hadoop/apps/spark/bin/spark-shell \
> --master spark://hadoop1:7077 \
> --executor-memory 500m \
> --total-executor-cores 1

参数说明：

–master spark://hadoop1:7077 指定Master的地址

–executor-memory 500m:指定每个worker可用内存为500m

–total-executor-cores 1: 指定整个集群使用的cup核数为1个

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注意：

如果启动spark shell时没有指定master地址，但是也可以正常启动spark shell和执行spark shell中的程序，其实是启动了spark的local模式，该模式仅在本机启动一个进程，没有与集群建立联系。

Spark Shell中已经默认将SparkContext类初始化为对象sc。用户代码如果需要用到，则直接应用sc即可

Spark Shell中已经默认将SparkSQl类初始化为对象spark。用户代码如果需要用到，则直接应用spark即可

3、 在spark shell中编写WordCount程序

（1）编写一个hello.txt文件并上传到HDFS上的spark目录下

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[hadoop@hadoop1 ~]$ vi hello.txt
[hadoop@hadoop1 ~]$ hadoop fs -mkdir -p /spark
[hadoop@hadoop1 ~]$ hadoop fs -put hello.txt /spark

hello.txt的内容如下

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you,jump
i,jump
you,jump
i,jump
jump

（2）在spark shell中用scala语言编写spark程序

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scala> sc.textFile("/spark/hello.txt").flatMap(_.split(",")).map((_,1)).reduceByKey(_+_).saveAsTextFile("/spark/out")

说明：

sc是SparkContext对象，该对象是提交spark程序的入口

textFile(“/spark/hello.txt”)是hdfs中读取数据

flatMap(_.split(“ “))先map再压平

map((_,1))将单词和1构成元组

reduceByKey(+)按照key进行reduce，并将value累加

saveAsTextFile(“/spark/out”)将结果写入到hdfs中

（3）使用hdfs命令查看结果

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[hadoop@hadoop2 ~]$ hadoop fs -cat /spark/out/p*
(jump,5)
(you,2)
(i,2)
[hadoop@hadoop2 ~]$

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七、 执行Spark程序on YARN

1、前提

成功启动zookeeper集群、HDFS集群、YARN集群

2、启动Spark on YARN

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[hadoop@hadoop1 bin]$ spark-shell --master yarn --deploy-mode client

报错如下：

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报错原因：内存资源给的过小，yarn直接kill掉进程，则报rpc连接失败、ClosedChannelException等错误。

解决方法：

先停止YARN服务，然后修改yarn-site.xml，增加如下内容

复制代码

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<property>
        <name>yarn.nodemanager.vmem-check-enabled</name>
        <value>false</value>
        <description>Whether virtual memory limits will be enforced for containers</description>
</property>
<property>
        <name>yarn.nodemanager.vmem-pmem-ratio</name>
        <value>4</value>
        <description>Ratio between virtual memory to physical memory when setting memory limits for containers</description>
</property>

复制代码

将新的yarn-site.xml文件分发到其他Hadoop节点对应的目录下，最后在重新启动YARN。

重新执行以下命令启动spark on yarn

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[hadoop@hadoop1 hadoop]$ spark-shell --master yarn --deploy-mode client

启动成功

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3、打开YARN的web界面

打开YARN WEB页面：http://hadoop4:8088
可以看到Spark shell应用程序正在运行

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单击ID号链接，可以看到该应用程序的详细信息

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单击“ApplicationMaster”链接

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4、运行程序

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scala> val array = Array(1,2,3,4,5)
array: Array[Int] = Array(1, 2, 3, 4, 5)

scala> val rdd = sc.makeRDD(array)
rdd: org.apache.spark.rdd.RDD[Int] = ParallelCollectionRDD[0] at makeRDD at <console>:26

scala> rdd.count
res0: Long = 5                                                                  

scala>

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再次查看YARN的web界面

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查看executors

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5、执行Spark自带的示例程序PI

复制代码

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[hadoop@hadoop1 ~]$ spark-submit --class org.apache.spark.examples.SparkPi \
> --master yarn \
> --deploy-mode cluster \
> --driver-memory 500m \
> --executor-memory 500m \
> --executor-cores 1 \
> /home/hadoop/apps/spark/examples/jars/spark-examples_2.11-2.3.0.jar 
> 10

执行过程

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[hadoop@hadoop1 ~]$ spark-submit --class org.apache.spark.examples.SparkPi \
> --master yarn \
> --deploy-mode cluster \
> --driver-memory 500m \
> --executor-memory 500m \
> --executor-cores 1 \
> /home/hadoop/apps/spark/examples/jars/spark-examples_2.11-2.3.0.jar \
> 10
2018-04-21 17:57:32 WARN  NativeCodeLoader:62 - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
2018-04-21 17:57:34 INFO  ConfiguredRMFailoverProxyProvider:100 - Failing over to rm2
2018-04-21 17:57:34 INFO  Client:54 - Requesting a new application from cluster with 4 NodeManagers
2018-04-21 17:57:34 INFO  Client:54 - Verifying our application has not requested more than the maximum memory capability of the cluster (8192 MB per container)
2018-04-21 17:57:34 INFO  Client:54 - Will allocate AM container, with 884 MB memory including 384 MB overhead
2018-04-21 17:57:34 INFO  Client:54 - Setting up container launch context for our AM
2018-04-21 17:57:34 INFO  Client:54 - Setting up the launch environment for our AM container
2018-04-21 17:57:34 INFO  Client:54 - Preparing resources for our AM container
2018-04-21 17:57:36 WARN  Client:66 - Neither spark.yarn.jars nor spark.yarn.archive is set, falling back to uploading libraries under SPARK_HOME.
2018-04-21 17:57:39 INFO  Client:54 - Uploading resource file:/tmp/spark-93bd68c9-85de-482e-bbd7-cd2cee60e720/__spark_libs__8262081479435245591.zip -> hdfs://myha01/user/hadoop/.sparkStaging/application_1524303370510_0005/__spark_libs__8262081479435245591.zip
2018-04-21 17:57:44 INFO  Client:54 - Uploading resource file:/home/hadoop/apps/spark/examples/jars/spark-examples_2.11-2.3.0.jar -> hdfs://myha01/user/hadoop/.sparkStaging/application_1524303370510_0005/spark-examples_2.11-2.3.0.jar
2018-04-21 17:57:44 INFO  Client:54 - Uploading resource file:/tmp/spark-93bd68c9-85de-482e-bbd7-cd2cee60e720/__spark_conf__2498510663663992254.zip -> hdfs://myha01/user/hadoop/.sparkStaging/application_1524303370510_0005/__spark_conf__.zip
2018-04-21 17:57:44 INFO  SecurityManager:54 - Changing view acls to: hadoop
2018-04-21 17:57:44 INFO  SecurityManager:54 - Changing modify acls to: hadoop
2018-04-21 17:57:44 INFO  SecurityManager:54 - Changing view acls groups to: 
2018-04-21 17:57:44 INFO  SecurityManager:54 - Changing modify acls groups to: 
2018-04-21 17:57:44 INFO  SecurityManager:54 - SecurityManager: authentication disabled; ui acls disabled; users  with view permissions: Set(hadoop); groups with view permissions: Set(); users  with modify permissions: Set(hadoop); groups with modify permissions: Set()
2018-04-21 17:57:44 INFO  Client:54 - Submitting application application_1524303370510_0005 to ResourceManager
2018-04-21 17:57:44 INFO  YarnClientImpl:273 - Submitted application application_1524303370510_0005
2018-04-21 17:57:45 INFO  Client:54 - Application report for application_1524303370510_0005 (state: ACCEPTED)
2018-04-21 17:57:45 INFO  Client:54 - 
     client token: N/A
     diagnostics: N/A
     ApplicationMaster host: N/A
     ApplicationMaster RPC port: -1
     queue: default
     start time: 1524304664749
     final status: UNDEFINED
     tracking URL: http://hadoop4:8088/proxy/application_1524303370510_0005/
     user: hadoop
2018-04-21 17:57:46 INFO  Client:54 - Application report for application_1524303370510_0005 (state: ACCEPTED)
2018-04-21 17:57:47 INFO  Client:54 - Application report for application_1524303370510_0005 (state: ACCEPTED)
2018-04-21 17:57:48 INFO  Client:54 - Application report for application_1524303370510_0005 (state: ACCEPTED)
2018-04-21 17:57:49 INFO  Client:54 - Application report for application_1524303370510_0005 (state: ACCEPTED)
2018-04-21 17:57:50 INFO  Client:54 - Application report for application_1524303370510_0005 (state: ACCEPTED)
2018-04-21 17:57:51 INFO  Client:54 - Application report for application_1524303370510_0005 (state: ACCEPTED)
2018-04-21 17:57:52 INFO  Client:54 - Application report for application_1524303370510_0005 (state: ACCEPTED)
2018-04-21 17:57:53 INFO  Client:54 - Application report for application_1524303370510_0005 (state: ACCEPTED)
2018-04-21 17:57:54 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:57:54 INFO  Client:54 - 
     client token: N/A
     diagnostics: N/A
     ApplicationMaster host: 192.168.123.104
     ApplicationMaster RPC port: 0
     queue: default
     start time: 1524304664749
     final status: UNDEFINED
     tracking URL: http://hadoop4:8088/proxy/application_1524303370510_0005/
     user: hadoop
2018-04-21 17:57:55 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:57:56 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:57:57 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:57:58 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:57:59 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:58:00 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:58:01 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:58:02 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:58:03 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:58:04 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:58:05 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:58:06 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:58:07 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:58:08 INFO  Client:54 - Application report for application_1524303370510_0005 (state: RUNNING)
2018-04-21 17:58:09 INFO  Client:54 - Application report for application_1524303370510_0005 (state: FINISHED)
2018-04-21 17:58:09 INFO  Client:54 - 
     client token: N/A
     diagnostics: N/A
     ApplicationMaster host: 192.168.123.104
     ApplicationMaster RPC port: 0
     queue: default
     start time: 1524304664749
     final status: SUCCEEDED
     tracking URL: http://hadoop4:8088/proxy/application_1524303370510_0005/
     user: hadoop
2018-04-21 17:58:09 INFO  Client:54 - Deleted staging directory hdfs://myha01/user/hadoop/.sparkStaging/application_1524303370510_0005
2018-04-21 17:58:09 INFO  ShutdownHookManager:54 - Shutdown hook called
2018-04-21 17:58:09 INFO  ShutdownHookManager:54 - Deleting directory /tmp/spark-93bd68c9-85de-482e-bbd7-cd2cee60e720
2018-04-21 17:58:09 INFO  ShutdownHookManager:54 - Deleting directory /tmp/spark-06de6905-8067-4f1e-a0a0-bc8a51daf535
[hadoop@hadoop1 ~]$
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