在archlinux上搭建twitter storm cluster

本文详细描述如何在archlinux上搭建twitter storm cluster,转载请注明出处，谢谢。

有关archlinux基本系统安装，请参照archlinux简明安装指南一文，下面以上述为基础讲解如何一步步安装twitter storm cluster.

先列出安装主要步骤

1. 安装oracle jdk
2. 安装必须的编译工具gcc, g++, make
3. 安装python2.7, unzip
4. 编译安装zeromq
5. 编译安装jzmq
6. 下载lein
7. 下载storm-starter
8. 下载storm release版本

安装zookeeper为了自动运行storm cluster，安装supervisord

安装oracle jdk

在linux平台上标配的java是openjdk,如果要安装oracle的jdk的话，需要从官方下载相应的安装包。使用archlinux幸福的一点就是有yaourt,一切可以变得非常简单,:).

#yaourt -S jdk

注意安装完的java路径，应该是在/opt/java, 这个后面会用到。

修改/etc/profile, 添加环境变量JAVA_HOME，为PATH添加/opt/java/bin

PATH="/usr/local/sbin:/usr/local/bin:/usr/bin:/opt/java/bin"
export PATH
export JAVA_HOME="/opt/java"

安装编译工具

在twitter storm中会使用zeromq，因为zeromq是用c&c++编写的，所以需要安装相应的编译工具，不要使用archlinux中的版本，因为目前pacman或aur中的zeromq版本是3.x，而twitter storm中需要的zeromq是2.1.7

#pacman -S gcc g++ libtool pkg-config make autoconf git util-linux

安装python2.7, unzip

#pacman -S python2 unzip 

编译安装zeromq,jzmq

从 http://download.zeromq.org/zeromq-2.1.7.tar.gz下载zeromq 2.1.7

#tar zvxf zeromq-2.1..tar.gz
#config
#make
#make install

安装的路径是/usr/local/lib

编译安装jzmq

#git clone https://github.com/nathanmarz/jzmq.git
#cd jzmq
#./autogen.sh
#./configure --with-zeromq=/usr/local
#make 注意，此处可能会出错，解决办法是修改jzmq/src/Makefile.am,将classdist_noinst.stamp修改为classnoinst.stamp
#make install

安装完zeromq和jzmq之后，修改/etc/ld.so.conf,在该文件中添加如下一行

/usr/local/lib

然后运行

#ldconfig 

为了验证libjzmq确实使用的zeromq是自行编译的版本，可使用如下命令进行检测。

#ldd /usr/local/lib/libjzmq.so
linux-gate.so. (0xb779e000)
    libzmq.so.1 => /usr/local/lib/libzmq.so.1 (0xb7749000)
    libuuid.so. => /usr/lib/libuuid.so. (0xb7743000)
    librt.so. => /usr/lib/librt.so. (0xb773a000)
    libpthread.so. => /usr/lib/libpthread.so. (0xb771e000)
    libstdc++.so. => /usr/lib/libstdc++.so. (0xb7635000)
    libm.so. => /usr/lib/libm.so. (0xb75ee000)
    libc.so. => /usr/lib/libc.so. (0xb743e000)
    libgcc_s.so. => /usr/lib/libgcc_s.so. (0xb7422000)
    /usr/lib/ld-linux.so. (0xb779f000)

如果libzmq.so.1确实指向/usr/local/lib中的版本，则说明版本使用正确。

安装storm-starter

storm-starter是由storm的作者为了storm的初学者快速上手而创建的一个github项目。

#git clone https://github.com/nathanmarz/storm-starter.git

编译运行, 注意这是运行在local模式而非常cluster模式

#lein deps
#lein compile
#java -cp $(lein classpath) storm.starter.ExclamationTopology

注：

    直接从http://leiningen.org/下载lein script，而非直接使用pacman或yaourt来安装

#chmod +x ./lein
#cp ./lein /usr/local/bin
#export LEIN_ROOT=1 如果想以root来运行lein,需要设置该变量　　

安装zookeeper

#yaourt -S zookeeper

作简单的配置，修改文件/etc/zookeeper/zoo.cfg,使其内容如下所示

#The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
dataDir=/var/lib/zookeeper
# the port at which the clients will connect
clientPort=2181

因为zookeeper只对IPv6地址进行监听，为了强制其只监听IPv4地址，需要修改/opt/zookeeper-3.4.5/bin/zkServer.sh，在start)一节中加入 "-Djava.net.preferIPv4Stack=true"， 整体看起来如下所示

case $ in
start)
    echo  -n "Starting zookeeper ... "
    if [ -f $ZOOPIDFILE ]; then
      if kill - `cat $ZOOPIDFILE` > /dev/null >&; then
         echo $command already running as process `cat $ZOOPIDFILE`.
         exit
      fi
    fi
    nohup $JAVA "-Dzookeeper.log.dir=${ZOO_LOG_DIR}" "-Dzookeeper.root.logger=${ZOO_LOG4J_PROP}" \
      "-Djava.net.preferIPv4Stack=true" \
    -cp "$CLASSPATH" $JVMFLAGS $ZOOMAIN "$ZOOCFG" > "$_ZOO_DAEMON_OUT" >& < /dev/null &
    if [ $? -eq  ]
    then
      if /bin/echo -n $! > "$ZOOPIDFILE"
      then
        sleep
        echo STARTED
      else
        echo FAILED TO WRITE PID
        exit
      fi
    else
      echo SERVER DID NOT START
      exit
    fi
    ;;  

注意蓝底红字的一行。

启动zookeeper

#/opt/zookeeper-3.4./bin/zkServer.sh start 

下载安装storm

从storm-project.net下载storm-0.8.2,将其解压到/opt目录下

#unzip storm-0.8..zip

修改/opt/storm-0.8.2/conf/storm.yaml, 文件内容如下

########### These MUST be filled in for a storm configuration
 storm.zookeeper.servers:
     - "localhost"
#     - "server2"
#
 nimbus.host: "localhost"
#
#
# ##### These may optionally be filled in:
#
## List of custom serializations
# topology.kryo.register:
#     - org.mycompany.MyType
#     - org.mycompany.MyType2: org.mycompany.MyType2Serializer
#
## List of custom kryo decorators
# topology.kryo.decorators:
#     - org.mycompany.MyDecorator
#
## Locations of the drpc servers
# drpc.servers:
#     - "server1"
#     - "server2"

## Metrics Consumers
# topology.metrics.consumer.register:
#   - class: "backtype.storm.metrics.LoggingMetricsConsumer"
#     parallelism.hint: 1
#   - class: "org.mycompany.MyMetricsConsumer"
#     parallelism.hint: 1
#     argument:
#       - endpoint: "metrics-collector.mycompany.org"
 java.library.path: "/usr/local/lib:/usr/local/share/java"
 supervisor.slots.ports:
   - 6700
   - 6701

注意：

　　yaml要求配置项必须以空格打头

修改storm脚本，将#!/usr/bin/python改为#!/usr/bin/python2, /usr/bin/python是指向python3的所以需要显示将其改为python2

准备运行cluster模式了

#/opt/storm-0.8./bin/storm nimbus
#/opt/storm-0.8./bin/storm supervisor
#/opt/storm-0.8./bin/storm ui

上述每条指令需要单独运行在一个终端，如果ui启动成功，可以使用浏览器来访问localhost:8080查看整个cluster的状况了。

部署Topology到cluster

#./storm jar $HOME/working/storm-starter/target/storm-starter-0.0.-SNAPSHOT-standalone.jar storm.starter.ExclamationTopology exclamationTopology

一切顺利的话，应该可以看到类似的输出

0    [main] INFO  backtype.storm.StormSubmitter  - Jar not uploaded to master yet. Submitting jar...
91   [main] INFO  backtype.storm.StormSubmitter  - Uploading topology jar /root/working/storm-starter/target/storm-starter-0.0.1-SNAPSHOT-standalone.jar to assigned location: storm-local/nimbus/inbox/stormjar-c73d28f0-68fc-4e6e-98b5-c4d1355aa94f.jar
667  [main] INFO  backtype.storm.StormSubmitter  - Successfully uploaded topology jar to assigned location: storm-local/nimbus/inbox/stormjar-c73d28f0-68fc-4e6e-98b5-c4d1355aa94f.jar
670  [main] INFO  backtype.storm.StormSubmitter  - Submitting topology exclamationTopology in distributed mode with conf {"topology.workers":3,"topology.debug":true}
2449 [main] INFO  backtype.storm.StormSubmitter  - Finished submitting topology: exclamationTopology

自动化运行storm cluster

每次都要手工启动storm cluster并不是一件很令人愉快的事，最好是能自动启动。解决办法总是有的，使用python supervisor即可。

#pacman -S supervisor
#mkdir -p /var/log/storm

修改supervisor配置文件，在文件最后添加如下内容

[program:storm-nimbus]
environment=JAVA_HOME=/opt/java, PATH="/usr/sbin:/usr/bin:/usr/local/bin:/opt/java/bin"
command=/opt/storm-0.8.2/bin/storm nimbus
;;user=storm
autostart=true
autorestart=true
startsecs=10
startretries=999
log_stdout=true
log_stderr=true
logfile=/var/log/storm/nimbus.out
logfile_maxbytes=20MB
logfile_backups=10

[program:storm-supervisor]
environment=JAVA_HOME=/opt/java, PATH="/usr/sbin:/usr/bin:/usr/local/bin:/opt/java/bin"
command=/opt/storm-0.8.2/bin/storm supervisor
;;user=storm
autostart=true
autorestart=true
startsecs=10
startretries=999
log_stdout=true
log_stderr=true
logfile=/var/log/storm/supervisor.out
logfile_maxbytes=20MB
logfile_backups=10

注：

    在上述配置中显示加入了environment一行，主要是为了解决可执行文件搜索路径的问题，否则会报错说无法找到java可执行程序因其不在标准路径/usr/bin, /usr/sbin, /usr/local/bin, /usr/local/sbin中。

启动supervisord

#systemctl start supervisord

想开机自动运行supervisord的话，执行如下指令

#systemctl enable supervisord

参考资料

1. Running a Multi-Node Storm Cluster http://www.michael-noll.com/tutorials/running-multi-node-storm-cluster/