A time-series data store based on Apache Cassandra.

安装环境
CentOS7 (新增一台服务器，地址为192.168.1.21，安装Cassandra和Newts，服务器192.168.1.20还是运行OpenNMS)
Java8 (OpenJDK, Oracle, etc)

1 安装Cassandra
下载地址：http://cassandra.apache.org/

解压命令，解压到/opt目录
tar -zxf apache-cassandra-3.11.0-bin.tar.gz -C /opt

配置
vi /opt/apache-cassandra-3.11.0/conf/cassandra.yaml
修改地址，例如本机地址为192.168.1.21
rpc_address: 192.168.1.21

启动
bin/cassandra -R

查看状态
bin/nodetool status

2 安装Newts（可选）
下载地址：https://github.com/OpenNMS/newts/releases

解压命令，解压到/opt目录
tar -zxf newts-1.4.3-bin.tar.gz /opt

修改地址，vi etc/config.yaml
host: 192.168.1.21

初始化/启动
bin/init etc/config.yaml
bin/newts -c etc/config.yaml

Web UI 访问地址
http://localhost:8080/ui/

3 配置OpenNMS

vi etc/opennms.properties
修改如下:

org.opennms.rrd.storeByGroup=true
org.opennms.rrd.storeByForeignSource=true
org.opennms.timeseries.strategy=newts
org.opennms.newts.config.hostname=192.168.1.21
org.opennms.newts.config.keyspace=newts
org.opennms.newts.config.port=9042

或者

cat << EOF | sudo tee /opt/opennms/etc/opennms.properties.d/timeseries.properties
# Configure storage strategy
org.opennms.rrd.storeByForeignSource=true
org.opennms.timeseries.strategy=newts
 
# Configure Newts time series storage connection
org.opennms.newts.config.hostname=$ipaddress$
org.opennms.newts.config.keyspace=newts
org.opennms.newts.config.port=9042
EOF

${OPENNMS_HOME}/bin/newts init

4 用户/密码连接Cassandra

vi conf/cassandra.yaml

修改：authenticator: PasswordAuthenticator

登录Cassandra，并创建用户

bin/cqlsh -ucassandra -pcassandra

CREATE USER opennms WITH PASSWORD 'opennms' SUPERUSER;

使用新用户登录，删除默认账号

DROP USER cassandra;

修改etc/opennms.properties.d/timeseries.properties

org.opennms.newts.config.username=opennms
 
org.opennms.newts.config.password=opennms

OpenNMS相关安装、配置视频下载地址：