CentOS7 从零搭建 Cassandra3.7集群

朱雀 2022-07-16 00:14 225阅读 0赞

*  序言
 *  配置基础环境
 *  配置Cassandra
 *  调试

# 序言 #

1.  官网下载 [Cassandra3.7][], OpenJDK1.8
2.  将软件包拷贝至目录： /usr/local
3.  准备三台CentOS7机器：192.16.169.130(seed), 192.16.169.136(seed), 192.16.169.137

# 配置基础环境 #

1.  设置零食变量方便部署
    
        jdkFolder='/usr/local/jdk1.8'
        cassRepo='/home/cassandra/repository'
        currIp=192.168.169.137 #不同机器设置不同
2.  添加用户以及用户组
    
        groupadd cassandra
        useradd -d /home/cassandra  -g cassandra cassandra
3.  安装JAVA
    
        #install jdk
        
        tar -zxvf  /usr/local/jdk-8u101-linux-x64.tar.gz
        mv jdk1.8.0_101 ${jdkFolder}
        
        
        #configurate environment
        
        echo export JAVA_HOME=${jdkFolder} >> /etc/profile
        echo 'export JRE_HOME=$JAVA_HOME/jre' >> /etc/profile
        echo 'export PATH=$PATH:$JAVA_HOME/bin' >> /etc/profile
        echo 'export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar' >> /etc/profile

4 关闭防火墙

```
    #close firewall
    systemctl stop firewalld.service
    systemctl disable firewalld.service
    ```

5. 针对Cassandra，优化机器

```
    #systcl.conf
    echo 'vm.zone_reclaim_mode=0' >> /etc/sysctl.conf
    echo 'vm.max_map_count=262144' >> /etc/sysctl.conf
    echo 'vm.swappiness=1' >> etc/sysctl.conf
    
    sysctl -p
    
    #PAM limits.conf
    echo '* soft nofile 65536' >> /etc/security/limits.conf
    echo '* hard nofile 65536' >> /etc/security/limits.conf
    echo '* soft nproc  65536' >> /etc/security/limits.conf
    echo '* hard nproc  65536' >> /etc/security/limits.conf
    ```

# 配置Cassandra #

1.  安装Cassandra
    
        cassDir='/home/cassandra/cassandra3.7'
        tar -zxvf apache-cassandra-3.7-bin.tar.gz
        
        mv apache-cassandra-3.7 $cassDir
        chown -R cassandra:cassandra $cassDir
        echo 'export PATH=$PATH:/home/cassandra/cassandra3.7/bin' >> /etc/profile
        echo export CASSANDRA_HOME=$cassDir >> /etc/profile
        source /etc/profile
2.  创建目录
    
        mkdir $cassRepo
        mkdir $cassRepo/data
        mkdir $cassRepo/commitlog
        mkdir $cassRepo/saved_cache
        
        chmod -R 777 $cassRepo
        chown -R cassandra:cassandra $cassRepo
3.  配置

cp /home/cassandra/cassandra3.7/conf/cassandra.yaml  $CASSANDRA_HOME/conf/cassandra.yaml.bak #备份配置文件
    sed -i "s/^cluster_name:[^aa]*$/cluster_name: 'HZ Test'/" $CASSANDRA_HOME/conf/cassandra.yaml
    sed -i 's/- seeds: "127.0.0.1"/- seeds: "192.168.169.130,192.168.169.136"/' $CASSANDRA_HOME/conf/cassandra.yaml #注意地址列表
    sed -i "s/^listen_address: localhost$/listen_address: $currIp/" $CASSANDRA_HOME/conf/cassandra.yaml
    sed -i "s/^rpc_address: localhost$/rpc_address: $currIp/" $CASSANDRA_HOME/conf/cassandra.yaml
    echo data_file_directories:>> $CASSANDRA_HOME/conf/cassandra.yaml
    echo " - $cassRepo/data" >> $CASSANDRA_HOME/conf/cassandra.yaml
    echo commitlog_directory: $cassRepo/commitlog  >> $CASSANDRA_HOME/conf/cassandra.yaml
    echo saved_caches_directory: $cassRepo/saved_cache>> $CASSANDRA_HOME/conf/cassandra.yaml

# 调试 #

1.  从Seed 节点依次启动机器
    
        su cassandra
        cassandra -f
2.  查看节点状态
    
        nodetool status
    
    ![status][]
3.  测试CQL
    
        cqlsh 192.168.169.130
    
    ![cql][]

--------------------

引用  
[http://blog.csdn.net/chenxingzhen001/article/details/8729623][http_blog.csdn.net_chenxingzhen001_article_details_8729623]

[Cassandra3.7]: http://cassandra.apache.org/
[status]: /images/20220716/3817ae706af642029c24190ae851e639.png
[cql]: /images/20220716/aae3116ea53d4a35badb398879d67519.png
[http_blog.csdn.net_chenxingzhen001_article_details_8729623]: http://blog.csdn.net/chenxingzhen001/article/details/8729623