Centos6 磁盘挂载

淩亂°似流年 2022-02-24 02:56 272阅读 0赞

# 1. Centos6磁盘挂载 #

*  添加一块磁盘  
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# 2. 分区，格式化，挂载新磁盘 #

*  磁盘挂载

df -lh
    fdisk -l
    fdisk /dev/sdb   这个命令执行后依次输 n  p  1  回车  回车  w
    fdisk -l
    mkfs -t ext4 -c /dev/sdb1   格式化我们的分区
    mkdir /data02
    mount -t ext4 /dev/sdb1 /data02
    df –lh

*  如果系统重启，重新执行一下挂载命令即可

mount -t ext4 /dev/sdb1 /data02

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# 3. centos6.5制作本地yum源（可以不需要） #

mkdir -p /centos64/centos01
    cd  /dev
    ll cdrom
    man mount
    mount -o loop -t iso9660 /dev/cdrom /centos64/centos01/
    ln -s /centos64/centos01/ centos01
    cd /etc/yum.repos.d/
    mkdir bak
    mv ./*.repo bak
    cp bak/CentOS-Media.repo localcentos.repo
    vi localcentos.repo
    [localcentos]
    name=localcentos
    baseurl=http://hadoop-ehp01.cloudyhadoop.com/centos01/
    gpgcheck=0
    enabled=1

yum clean all  
yum list|grep httpd

# 4. 制作本地yum源安装impala服务 #

yum  -y install httpd
    service httpd start
    cd /etc/yum.repos.d
    vi localcdh.repo
    [localcdh]
    name=localcdh
    baseurl=http://node02/cdh5.14.0/
    gpgcheck=0
    enabled=1

# 5. 开始安装impala #

yum  install  impala
    yum install impala-server
    yum install impala-state-store
    yum install impala-catalog
    yum  install  impala-shell

*  创建连接到配置目录下来

ln -s /export/servers/hadoop-2.7.5/etc/hadoop/core-site.xml /etc/impala/conf/core-site.xml
    ln -s /export/servers/hadoop-2.7.5/etc/hadoop/hdfs-site.xml /etc/impala/conf/hdfs-site.xml
    ln -s /export/servers/apache-hive-1.2.1-bin/conf/hive-site.xml /etc/impala/conf/hive-site.xml

*  修改所有的hdfs-site.xml添加以下配置  
    所有节点创建文件夹

mkdir -p /var/run/hdfs-sockets

<property>
    		<name>dfs.client.read.shortcircuit</name>
    		<value>true</value>
    	</property>
    	<property>
    		<name>dfs.domain.socket.path</name>
    		<value>/var/run/hdfs-sockets/dn</value>
    	</property>
    	<property>
    		<name>dfs.client.file-block-storage-locations.timeout.millis</name>
    		<value>10000</value>
    	</property>

*  创建文件夹 /var/run/hadoop-hdfs/  
    给这个文件夹赋予权限，例如如果我们用的是普通用户，那就直接赋予普通用户的权限  
    例如：  
    chown -R hadoop:hadoop /var/run/hadoop-hdfs/  
    因为我这里直接用的root用户，所以不需要赋权限了
 *  所有datanode节点的hdfs-site.xml中添加以下配置启用文件block块追踪

<property>
    <name>dfs.datanode.hdfs-blocks-metadata.enabled</name>
    <value>true</value>
    </property>

*  重启datanode  
    sbin/stop-dfs.sh  
    sbin/start-dfs.sh
 *  所有节点更改impala默认配置文件  
    vim /etc/default/impala  
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    ln -s /export/servers/apache-hive-1.2.1-bin/lib/mysql-connector-java-5.1.38.jar /usr/share/java/mysql-connector-java.jar

# 6. 启动Impala服务 #

*  主节点启动以下三个服务进程  
    service impala-state-store start  
    service impala-catalog start  
    service impala-server start
 *  从节点启动impala-server即可  
    service impala-server start

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