天天看点
返回

Linux系统运维之Hadoop、Hive、Flume数据处理

配置环境 

主机名
IP 备注 
Hadoop-Data01
           
192.168.0.194
           
Hadoop-Master                /Hive/Mysql/Flume-Agent      
Hadoop-Data02
           
192.168.0.195
           
Hadoop-Slave
           
CentOS release 6.6 (Final)
Hdk-8u131-linux-x64
Hadoop-2.7.3
Hive-2.1.1
Apache-flume-1.7.0-bin      
[[email protected] soft]# wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.tar.gz
[[email protected] soft]# wget http://apache.fayea.com/hadoop/common/hadoop-2.7.3/hadoop-2.7.3-src.tar.gz
[[email protected] soft]# wget http://apache.fayea.com/hive/hive-2.1.1/apache-hive-2.1.1-bin.tar.gz

Hadoop部署 

[[email protected] ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.0.194   Hadoop-Data01
192.168.0.195   Hadoop-Data02
192.168.0.196   Hadoop-Data03
注：Slave服务器内容同上.

  配置Hadoop-Master、Hadoop-Slave主机间的免key登录：

[[email protected] ~]# vim /etc/ssh/sshd_config
RSAAuthentication yes
PubkeyAuthentication yes
注：这里可以通过sed：sed -i '47,48s/^#//g' /etc/ssh/sshd_config
[[email protected]-Data01 ~]# ssh-keygen -t rsa
[[email protected]-Data01 .ssh]# cat authorized_keys 
ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA2JGjCEwc+H3/5Y939DHSkhHYAO7qPjO86gyaqvlN2j1ZMUhdKhXUmTH0pBBwXIqp9jooTXxtIu55cuBvOeBD6eUKN5mH9rydRIXm8HEvb9nQzOvVghP1E9lBTGsGXkUWDo0KPkFYOhb2NguYibzVUgpUpAt0NY5iqdenXNqvDOWGhWqDsg/C6VnUzsxskiT9x2EROhddWQnYsObXxjOasgdGPngzZsJZPchRboS+HfvVF0uSyUjljtKsQqYOX2Nt0plO4t6VlcnZXvjDXKezJCNwGToFvvoiIHnjVu/akgtv/bpd8HZp1dZEj7cYnSFkqN5xdodg7TmtjAjobutU5Q== [email protected]Data01
ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAvQ3JZOtdfFvrsM/m6YwQQuGkOCpNt0+tw87tS4p1gB98ZAn+zaUnFMw5Gvo0i1KvHVaxmb0s1gqDjGDNVLQM5MB60emyVFHLs6DZBI5f4c0BiA17KfDRzlsfuTmuLdymmoj54OhPbEcH+mwo/N1UK9V0gqxAB9abC6UFT00MXXXJN1+qBkV9mUuFbXhn4m5/DCoEbIxvMlWghAsSrDtMaMtJYRumRvd7MLwwefdCYyQd8dZASE1Z8VP0K/BDRntWXCeKGCVMb4uJAnSdhN6ZcRme/Qlx0YCkPpQir3jgcblVW5RODNUyaIc+vUMp9UYagvK7nKKfWAGa/MPdyfu2nw== [email protected]Data02
ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA1pC5Py1aqbojVetakak3WmxJf4DgmTe1ci60tn9Hyq84kdAhw7z1lAQN544uPDDvl4XPki36Y13Hjl0P+S3g11iOi42FRugkBDmokqADZrUfp5tqWX8K9QvYMePoyiuQlnrGAyCpOiMmEAykBR6lVkNHgPAWThjU9eggt6dalMPiy/dDKZNemlWGHy8wdS5PyjVsIuDGgTtNLADn6OOaYcO/UWq78gqc1Nkq4mNxKSTYorh7taki9SKw4cq0NeggDFz7cZEewtgJdRla0W2ZKz8bgfuUSSntbN55/uCVUSgK+kurqRmklQ3sA3c9687BH1Lse5luDFJRaYo2wa5nlQ== [email protected]Data03
注：合并三台服务器/root/.ssh/id_rsa.pub文件到authorized_keys
[[email protected]-Data01 .ssh]# scp authorized_keys [email protected]192.168.0.195:/root/.ssh/
[[email protected]-Data01 .ssh]# scp authorized_keys [email protected]192.168.0.196:/root/.ssh/

  在各个主机上安装JDK

[[email protected] soft]# tar -xf jdk-8u131-linux-x64.tar.gz
[[email protected]-Data01 soft]# \cp -r jdk1.8.0_131 /usr/local/
[[email protected]-Data01 soft]# cd /usr/local/
[[email protected]-Data01 local]# ln -s jdk1.8.0_131 jdk
[[email protected]-Data01 ~]# vim /etc/profile
>>>>>
ulimit -n 10240
export JAVA_HOME=/usr/local/jdk
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH
[[email protected]-Data01 ~]# source /etc/profile
[[email protected]-Data03 ~]# java -version
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)

 安装hadoop

/usr/local/hadoop/etc/hadoop/core-site.xml配置文件：
[[email protected]-Data01 soft]# tar -xf hadoop-2.7.3.tar.gz
[[email protected]-Data01 soft]# mv hadoop-2.7.3 /usr/local/
[[email protected]-Data01 soft]# cd /usr/local/
[[email protected]-Data01 local]# ln -s hadoop-2.7.3 hadoop
[[email protected]-Data01 hadoop]# vim core-site.xml
>>>>>
<configuration>
    <property>
        <name>fs.defaultFS</name>
        <value>hdfs://192.168.0.194:9000</value>
    </property>
    <property>
        <name>hadoop.tmp.dir</name>
        <value>file:/usr/local/hadoop/tmp</value>
    </property>
    <property>
        <name>io.file.buffer.size</name>
        <value>1024</value>
    </property>
</configuration>
注：
<fs.defaultFS>:默认文件系统的名称，URI形式，uri的scheme需要由(fs.SCHEME.impl)指定文件系统实现类；uri的authority部分用来指定host、port等；默认是本地文件系统。HA方式，这里设置服务名，例如：hdfs:// 192.168.0.194:9000，HDFS的客户端访问HDFS需要此参数；
<hadoop.tmp.dir>:Hadoop的临时目录，其它目录会基于此路径，本地目录。只可以设置一个值；建议设置到一个足够空间的地方，而不是默认的/tmp下，服务端参数，修改需重启；
<io.file.buffer.size>:在读写文件时使用的缓存大小，这个大小应该是内存Page的倍数，建议1M。

----------

/usr/local/hadoop/etc/hadoop/hdfs-site.xml配置文件：
[[email protected]-Data01 hadoop]# vim hdfs-site.xml
>>>>>
<configuration>
    <property>
        <name>dfs.namenode.name.dir</name>
        <value>file:/usr/local/hadoop/dfs/name</value>
    </property>
    <property>
        <name>dfs.datanode.data.dir</name>
        <value>file:/usr/local/hadoop/dfs/data</value>
    </property>
    <property>
        <name>dfs.replication</name>
        <value>2</value>
    </property>
    <property>
        <name>dfs.namenode.secondary.http-address</name>
        <value>192.168.0.194:9001</value>
    </property>
    <property>
        <name>dfs.webhdfs.enabled</name>
        <value>true</value>
    </property>
</configuration>
注：
<dfs.namenode.name.dir>:本地磁盘目录，NN存储fsimage文件的地方;可以是按逗号分隔的目录列表，fsimage文件会存储在全部目录，冗余安全;这里多个目录设定，最好在多个磁盘，另外，如果其中一个磁盘故障，不会导致系统故障，会跳过坏磁盘。由于使用了HA，建议仅设置一个,如果特别在意安全，可以设置2个;
<dfs.datanode.data.dir>:本地磁盘目录，HDFS数据应该存储Block的地方。可以是逗号分隔的目录列表（典型的，每个目录在不同的磁盘），这些目录被轮流使用，一个块存储在这个目录，下一个块存储在下一个目录，依次循环；每个块在同一个机器上仅存储一份，不存在的目录被忽略；必须创建文件夹，否则被视为不存在；
<dfs.replication>:数据块副本数，此值可以在创建文件是设定，客户端可以只有设定，也可以在命令行修改；不同文件可以有不同的副本数，默认值用于未指定时。
<dfs.namenode.secondary.http-address>:SNN的http服务地址，如果是0，服务将随机选择一个空闲端口，使用了HA后，就不再使用SNN；
<dfs.webhdfs.enabled>:在NN和DN上开启WebHDFS (REST API)功能。

----------

/usr/local/hadoop/etc/hadoop/mapred-site.xml配置文件：
[[email protected]-Data01 hadoop]# cp mapred-site.xml.template mapred-site.xml
[[email protected]-Data01 hadoop]# vim mapred-site.xml
>>>>>
<configuration>
    <property>
        <name>mapreduce.framework.name</name>
        <value>yarn</value>
    </property>
    <property>
        <name>mapreduce.jobhistory.address</name>
        <value>192.168.0.194:10020</value>
    </property>
    <property>
       <name>mapreduce.jobhistory.webapp.address</name>
        <value>192.168.0.194:19888</value>
    </property>
</configuration>

/usr/local/hadoop/etc/hadoop/yarn-site.xml配置文件：
[[email protected]-Data01 hadoop]# vim yarn-site.xml
>>>>>
<configuration>
    <property>
        <name>yarn.nodemanager.aux-services</name>
        <value>mapreduce_shuffle</value>
    </property>
    <property>  
    <name>yarn.nodemanager.auxservices.mapreduce.shuffle.class</name>
        <value>org.apache.hadoop.mapred.ShuffleHandler</value>
    </property>
    <property>
        <name>yarn.resourcemanager.address</name>
        <value>192.168.0.194:8032</value>
    </property>
    <property>
        <name>yarn.resourcemanager.scheduler.address</name>
        <value>192.168.0.194:8030</value>
    </property>
    <property>
        <name>yarn.resourcemanager.resource-tracker.address</name>
        <value>192.168.0.194:8031</value>
    </property>
    <property>
        <name>yarn.resourcemanager.admin.address</name>
        <value>192.168.0.194:8033</value>
    </property>
    <property>
        <name>yarn.resourcemanager.webapp.address</name>
        <value>192.168.0.194:8088</value>
    </property>
    <property>
        <name>yarn.nodemanager.resource.memory-mb</name>
        <value>8192</value>
    </property>
</configuration>
注：
<mapreduce.framework.name>:MapReduce按照任务大小和设置的不同，提供了两种任务模式：①本地模式（LocalJobRunner实现）mapreduce.framework.name设置为local，则不会使用YARN集群来分配资源，在本地节点执行。在本地模式运行的任务，无法发挥集群的优势。在web UI是查看不到本地模式运行的任务。②Yarn模式（YARNRunner实现）mapreduce.framework.name设置为yarn，当客户端配置mapreduce.framework.name为yarn时, 客户端会使用YARNRunner与服务端通信, 而YARNRunner真正的实现是通过ClientRMProtocol与RM交互, 包括提交Application, 查询状态等功能。
<mapreduce.jobhistory.address>和<mapreduce.jobhistory.webapp.address>:Hadoop自带了一个历史服务器，可以通过历史服务器查看已经运行完的Mapreduce作业记录，比如用了多少个Map、用了多少个Reduce、作业提交时间、作业启动时间、作业完成时间等信息。

----------

配置hadoop环境变量：
[[email protected]-Data01 hadoop]# vim /etc/profile
>>>>>
export HADOOP_HOME=/usr/local/hadoop
export PATH=$HADOOP_HOME/bin:$PATH

[[email protected]-Data01 hadoop]# vim hadoop-env.sh
>>>>>
export JAVA_HOME=/usr/local/jdk

添加从节点IP到Slave文件：
[[email protected]-Data01 hadoop]# echo > slave && echo 192.168.0.195 > slave

拷贝hadoop服务目录到从主机：
[[email protected]-Data01 local]# \scp -r hadoop-2.7.3 [email protected]192.168.0.195:/usr/local/

进入Hadoop目录，启动Hadoop-Master主机上的服务：
①初始化：
[[email protected]-Data01 bin]# sh /usr/local/hadoop/bin/hdfs namenode -format
②启动服务：
[[email protected]-Data01 sbin]# sh /usr/local/hadoop/sbin/start-all.sh
③关闭服务：
[[email protected]-Data01 sbin]# sh /usr/local/hadoop/sbin/stop-all.sh
④查看组件：
[[email protected]-Data01 sbin]# jps
6517 SecondaryNameNode
6326 NameNode
6682 ResourceManager
6958 Jps

 测试访问OK

浏览器访问：http://192.168.0.194:8088/
Linux系统运维之Hadoop、Hive、Flume数据处理
浏览器访问：http://192.168.0.194:50070/
Linux系统运维之Hadoop、Hive、Flume数据处理

部署Hive

 解压部署、配置环境变量:

[[email protected] soft]# tar -xf  apache-hive-2.1.1-bin.tar.gz
[[email protected]-Data01 soft]# mv apache-hive-2.1.1-bin /usr/local/
[[email protected]-Data01 soft]# cd /usr/local/
[[email protected]-Data01 local]# ln -s apache-hive-2.1.1-bin hive
[[email protected]-Data01 conf]# cp hive-env.sh.template hive-env.sh
[[email protected]-Data01 conf]# vim hive-env.sh
>>>>>
HADOOP_HOME=/usr/local/hadoop
export HIVE_CONF_DIR=/usr/loca/hive/conf
export HIVE_AUX_JARS_PATH=/usr/loca/hive/lib

 安装部署mysql环境

[[email protected] conf]# yum install httpd php mysql mysql-server php-mysql -y
[[email protected]-Data01 conf]# /usr/bin/mysqladmin -u root password 'hadoopmysql'
[[email protected]-Data01 conf]# /usr/bin/mysqladmin -u root -h192.168.0.194 password 'hadoopmysql'
[[email protected]-Data01 conf]# mysql -uroot -phadoopmysql
mysql> create user 'hive' identified by 'hive';
mysql> grant all privileges on *.* to 'hive'@'localhost' identified by 'hive';
Query OK, 0 rows affected (0.00 sec)

mysql> grant all privileges on *.* to 'hive'@'%' identified by 'hiveycfw';
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> create database hive;
Query OK, 1 row affected (0.00 sec)

 修改HIVE配置文件:

[[email protected] conf]# vim hive-site.xml
44行：>>>>>
<name>hive.exec.local.scratchdir</name>
<value>/usr/local/hive/iotmp</value>
批量替换：:%s/${system:java.io.tmpdir}/\/usr\/local\/hive\/iotmp/g
486行：>>>>>
<name>javax.jdo.option.ConnectionPassword</name>
<value>hive</value>
501行：>>>>>
<name>javax.jdo.option.ConnectionURL</name>
<value>jdbc:mysql://localhost:3306/hive?createDatabaseIfNotExist=true</value>
686行：>>>>>
<name>hive.metastore.schema.verification</name>
<value>false</value>
933行：>>>>>
<name>javax.jdo.option.ConnectionDriverName</name>
<value>com.mysql.jdbc.Driver</value>
957行：>>>>>
<name>javax.jdo.option.ConnectionUserName</name>
<value>hive</value>

拷贝JDBC驱动到lib目录下：
[[email protected]-Data01 mysql-connector-java-5.1.42]# cp mysql-connector-java-5.1.42-bin.jar  /usr/local/hive/lib/

精简版hive-site.xml：
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
    <property>
        <name>javax.jdo.option.ConnectionURL</name>     #数据库连接串
        <value>jdbc:mysql://localhost:3306/hive?createDatabaseIfNotExist=true</value>
    </property>
    <property>
        <name>javax.jdo.option.ConnectionDriverName</name>  #JDBC驱动
        <value>com.mysql.jdbc.Driver</value>
    </property>
    <property>
        <name>javax.jdo.option.ConnectionUserName</name>    #数据库账号
        <value>hive</value>
    </property>
    <property>
        <name>javax.jdo.option.ConnectionPassword</name>    #数据库密码
        <value>hive</value>
    </property>
    <property>
        <name>hive.metastore.warehouse.dir</name>       #该参数指定了 Hive 的数据存储目录，默认位置在 HDFS 上面的 /user/hive/warehouse 路径下
        <value>/user/hive/warehouse</value>
    </property>
    <property>
        <name>hive.exec.scratchdir</name>       #该参数指定了 Hive 的数据临时文件目录，默认位置为 HDFS 上面的 /tmp/hive 路径下
        <value>/tmp/hive</value>
    </property>
</configuration>

 初始化Mysql

[[email protected] bin]# schematool -initSchema -dbType mysql      #初始化完成后，mysql数据库中会增加hive库
which: no hbase in (/usr/local/hive/bin:/usr/local/hive/conf:/usr/local/hadoop/bin:/usr/local/jdk//bin:/usr/local/jdk//jre/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin)
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/usr/local/apache-hive-2.1.1-bin/lib/log4j-slf4j-impl-2.4.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/usr/local/hadoop-2.7.3/share/hadoop/common/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
Metastore connection URL:    jdbc:mysql://localhost:3306/hive?createDatabaseIfNotExist=true
Metastore Connection Driver :    com.mysql.jdbc.Driver
Metastore connection User:   hive
Starting metastore schema initialization to 2.1.0
Initialization script hive-schema-2.1.0.mysql.sql
Initialization script completed
schemaTool completed

 启动Hive

[[email protected] bin]# ./hive
Logging initialized using configuration in jar:file:/usr/local/apache-hive-1.2.2-bin/lib/hive-common-1.2.2.jar!/hive-log4j.properties
hive>
hive> show functions;   #查看hive函数；
hive> desc function day;    #查看day函数详细信息；
OK
day(param) - Returns the day of the month of date/timestamp, or day component of interval
Time taken: 0.039 seconds, Fetched: 1 row(s)

部署Flume

一、简介

  1. flume是分布式的日志收集系统，把收集来的数据传送到目的地去。
  2. flume里面有个核心概念，叫做agent。agent是一个java进程，运行在日志收集节点。
  3. agent里面包含3个核心组件：source、channel、sink。 source组件是专用于收集日志的，可以处理各种类型各种格式的日志数据,包括avro、thrift、exec、jms、spooling directory、netcat、sequence generator、syslog、http、legacy、自定义。 source组件把数据收集来以后，临时存放在channel中。 channel组件是在agent中专用于临时存储数据的，可以存放在memory、jdbc、file、自定义。 channel中的数据只有在sink发送成功之后才会被删除。 sink组件是用于把数据发送到目的地的组件，目的地包括hdfs、logger、avro、thrift、ipc、file、null、hbase、solr、自定义。
  4. 在整个数据传输过程中，流动的是event。事务保证是在event级别。
  5. flume可以支持多级flume的agent，支持扇入(fan-in)、扇出(fan-out)。

二、安装

 解压flume文件，传输到/usr/local/下(安装到hadoop服务器)：

[[email protected] soft]# \cp -r apache-flume-1.7.0-bin /usr/local/
[[email protected]-Data01 soft]# cd /usr/local/
[[email protected]-Data01 local]# ln -s apache-flume-1.7.0-bin flume
[[email protected]-Data01 conf]# cp flume-env.sh.template flume-env.sh
[[email protected]-Data01 conf]# vim flume-env.sh
>>>>：
export JAVA_HOME=/usr/local/jdk
[[email protected]-Data01 bin]# ./flume-ng version
Flume 1.7.0
Source code repository: https://git-wip-us.apache.org/repos/asf/flume.git
Revision: 511d868555dd4d16e6ce4fedc72c2d1454546707
Compiled by bessbd on Wed Oct 12 20:51:10 CEST 2016
From source with checksum 0d21b3ffdc55a07e1d08875872c00523

 下载flume服务到需要采集的服务器，这里是windows，然后配置/conf/flume-conf.properties:

a1.sources = r1
a1.sinks = k1
a1.channels = c1

# Describe/configure the source
a1.sources.r1.type = spooldir
a1.sources.r1.channels = c1
a1.sources.r1.spoolDir = D:\\flume\\log     #收集这个目录下的文件
a1.sources.r1.fileHeader = true
a1.sources.r1.basenameHeader = true
a1.sources.r1.basenameHeaderKey = fileName
a1.sources.r1.ignorePattern = ^(.)*\\.tmp$
a1.sources.r1.interceptors = i1
a1.sources.r1.interceptors.i1.type = timestamp

a1.sinks.k1.type = avro
a1.sinks.k1.hostname = 192.168.0.194        #接受agent端地址
a1.sinks.k1.port = 19949

# Use a channel which buffers events in memory
a1.channels.c1.type=memory  
a1.channels.c1.capacity=10000  
a1.channels.c1.transactionCapacity=1000  
a1.channels.c1.keep-alive=30  

# Bind the source and sink to the channel
a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1

 启动采集端服务，windows端：

D:\apache-flume-1.7.0-bin\bin>flume-ng.cmd agent --conf ..\conf --conf-file ..\conf\flume-conf.properties --name a1

 配置Linux端，agent配置/conf/flume-conf.properties:

tier1.sources=source1
tier1.channels=channel1
tier1.sinks=sink1

tier1.sources.source1.type=avro
tier1.sources.source1.bind=192.168.0.194    #flume接收端地址
tier1.sources.source1.port=19949
tier1.sources.source1.channels=channel1


tier1.channels.channel1.type=memory
tier1.channels.channel1.capacity=10000
tier1.channels.channel1.transactionCapacity=1000
tier1.channels.channel1.keep-alive=30

tier1.sinks.sink1.channel=channel1

tier1.sources.source1.interceptors=e1 e2
tier1.sources.source1.interceptors.e1.type=com.huawei.flume.InterceptorsCommons$Builder
tier1.sources.source1.interceptors.e2.type=com.huawei.flume.InterceptorsFlows$Builder

tier1.sinks.sink1.type = hdfs
tier1.sinks.sink1.hdfs.path=hdfs://192.168.0.194:9000/user/hive/warehouse/%{table_name}/inputdate=%Y-%m-%d      #flume接受端agent，hive表名
tier1.sinks.sink1.hdfs.writeFormat = Text
tier1.sinks.sink1.hdfs.fileType = DataStream
tier1.sinks.sink1.hdfs.fileSuffix = .log
tier1.sinks.sink1.hdfs.rollInterval = 0
tier1.sinks.sink1.hdfs.rollSize = 0
tier1.sinks.sink1.hdfs.rollCount = 0
tier1.sinks.sink1.hdfs.useLocalTimeStamp = true
tier1.sinks.sink1.hdfs.idleTimeout = 60
tier1.sinks.sink1.hdfs.rollSize = 125829120
tier1.sinks.sink1.hdfs.minBlockReplicas = 1

 启动Linux端，agent服务：

[[email protected] conf]# flume-ng agent -c /usr/local/flume/conf/ -f /usr/local/flume/conf/flume-conf.properties -n tier1 -Dflume.root.logger=DEBUG,console

转载于:https://www.cnblogs.com/zzlain/p/6895346.html

操作系统 运维 java
上一篇: python常用函数技巧汇总
下一篇: RAID常见问题集锦+底部案例

继续阅读