CentOS7 从零搭建 Cassandra3.7集群

• 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

   

3. 测试CQL

   cqlsh 192.168.169.130

   

---

引用
http://blog.csdn.net/chenxingzhen001/article/details/8729623