Ubuntu下安装cassandra

下载：
http://www.apache.org/dyn/closer.cgi?path=/cassandra/2.0.11/apache-cassandra-2.0.11-bin.tar.gz


安装说明：
该版本的cassandra需要java1.7以上的版本才能支持
到这里下载java1.8版本的
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html


安装配置java：
拷打/usr/local/下

tar xzf jdk-8u25-linux-x64.gz

设置环境：

root@zkserver2:/usr/local# cd
root@zkserver2:~# vi .bashrc 

加上

export JAVA_HOME=/usr/local/jdk1.8.0_25
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

保存，重新登录，查看java

root@zkserver2:~# java -version 
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)
root@zkserver2:~# 

ok，java is ok.


安装cassandra

root@zkserver2:/usr/local# tar xzf apache-cassandra-2.0.11-bin.tar.gz 

改下目录

root@zkserver2:/usr/local# mv apache-cassandra-2.0.11 cassandra

查看文件树形结构

root@zkserver2:/usr/local# tree -L 2
.
?..? cassandra
?...?..? bin
?...?..? CHANGES.txt
?...?..? conf
?...?..? interface
?...?..? javadoc
?...?..? lib
?...?..? LICENSE.txt
?...?..? NEWS.txt
?...?..? NOTICE.txt
?...?..? pylib
?...?..? tools

文件说明：
bin 存放与 Cassandra 操作的相关脚本
conf 存放配置文件的目录
interface Cassandra 的 Thrift 接口定义文件，可以用于生成各种编程语言的接口代码
Javadoc 源代码的 javadoc
lib Cassandra 运行时所需的 jar 包


配置：
查看下配置文件

vi cassanfra.uaml


****
data_file_directories:
    - /var/lib/cassandra/data
commitlog_directory: /var/lib/cassandra/commitlog
saved_caches_directory: /var/lib/cassandra/saved_caches
****

说明
data_file_directories：为数据文件目录
commitlog_directory：为日志文件目录
saved_caches_directory：为缓存文件目录


确认这些文件都存在，没有的话新建之。

~ sudo mkdir -p /var/lib/cassandra/data
~ sudo mkdir -p /var/lib/cassandra/saved_caches
~ sudo mkdir -p /var/lib/cassandra/commitlog
~ sudo mkdir -p /var/log/cassandra/

修改目录归属用户（我这里使用root ，就不用改了）

~ sudo chown -R conan:conan /var/lib/cassandra
~ sudo chown -R conan:conan /var/log/cassandra/

root@zkserver2:/usr/local# ll /var/lib/cassandra/
total 20
drwxr-xr-x  5 root root 4096 Nov 12 17:58 ./
drwxr-xr-x 54 root root 4096 Nov 12 17:57 ../
drwxr-xr-x  2 root root 4096 Nov 12 18:11 commitlog/
drwxr-xr-x  4 root root 4096 Nov 12 18:11 data/
drwxr-xr-x  2 root root 4096 Nov 12 17:57 saved_caches/

设置环境变量

~ sudo vi /etc/environment
CASSANDRA_HOME=/home/local/cassandra

# 让环境变量生效

~ . /etc/environment

#查看环境变量

~ echo $CASSANDRA_HOME
/home/local/cassandra

启动cassandra服务

/usr/local/cassandra/bin/cassandra

查看进程

root@zkserver2:/usr/local# ps -auxf|grep cassandra
Warning: bad ps syntax, perhaps a bogus '-'? See http://procps.sf.net/faq.html
root      5165  0.0  0.0   8108   924 pts/0    S+   18:45   0:00          \_ grep --color=auto cassandra
root      4641  2.0 19.4 2582564 197108 pts/0  Sl   18:11   0:40 /usr/local/jdk1.8.0********

使用客户端访问

root@zkserver2:/usr/local# /usr/local/cassandra/bin/cassandra-cli
Connected to: "Test Cluster" on 127.0.0.1/9160
Welcome to Cassandra CLI version 2.0.11


The CLI is deprecated and will be removed in Cassandra 3.0.  Consider migrating to cqlsh.
CQL is fully backwards compatible with Thrift data; see http://www.datastax.com/dev/blog/thrift-to-cql3


Type 'help;' or '?' for help.
Type 'quit;' or 'exit;' to quit.


[default@unknown] 

now,cassandra is ok,enjoy it.