CentOS 7.x Install OpenNMS

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To install OpenNMS on CentoS7 use following steps:

1. If you have java installed on your machine. Please Uninstall.

   yum remove openjdk-7
   or
   yum remove java*

2. Set hostname in '/etc/hostname'

   opennms

3. Point hostname with ipaddress in '/etc/hosts'

   192.168.1.X opennms

Install Oracle JAVA

1. Download Oracle java from below website

   http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

2. Install Oracle java

   yum localinstall jdk-8u131-linux-x64.rpm

3. Set JAVA_Home by appending following to /root/.bashrc and /etc/profile files

   export JAVA_HOME=/usr/java/jdk1.8.0_131/jre

   Here update JRE path and number appropriately based on install JDK

4. Logoff for JAVA settings to take effect

Install OpenNMS

1. Add opennms repository

   rpm -Uvh https://yum.opennms.org/repofiles/opennms-repo-stable-rhel7.noarch.rpm
   rpm --import https://yum.opennms.org/OPENNMS-GPG-KEY

2. Install opennms

   yum -y install opennms

Prepare PostgreSQL

1. Initialization of the PostgreSQL database

   postgresql-setup initdb

2. Start & enable PostgreSQL

   systemctl start postgresql
   systemctl enable postgresql

3. Create db for OpenNMS

   su - postgres
   createuser -P opennms
   createdb -O opennms opennms
   exit

4. Set password for Postgres super user

   su - postgres
   psql -c "ALTER USER postgres WITH PASSWORD 'YOUR-POSTGRES-PASSWORD';"
   exit

5. To allow OpenNMS access to the database over the local network PostgreSQL has to be configured in '/var/lib/pgsql/data/pg_hba.conf'

   host    all             all             127.0.0.1/32            md5
   host    all             all             ::1/128                 md5

6. Restart PostgreSQL

   systemctl restart postgresql

7. configure the OpenNMS database in '/opt/opennms/etc/opennms-datasources.xml'

Initialize OpenNMS

1. Configuration of Java environment for OpenNMS

   /opt/opennms/bin/runjava -s

2. Initialization of database and system libraries

   /opt/opennms/bin/install -dis

3. System startup configuration for OpenNMS

   systemctl enable opennms

4. Start OpenNMS

   systemctl start opennms

5. Access opennms from web

   http://<ip-or-fqdn-of-your-server>:8980/opennms

6. Install RRD tool

   yum install rrdtool -y

7. Install epel-release

   yum install epel-release

8. Install R Statistics System

   yum install R -y

Configure email

1. Configure email settings in java properties file '/opt/opennms/etc/javamail-configuration.properties'

   org.opennms.core.utils.useJMTA=false
   org.opennms.core.utils.transport=smtp
   org.opennms.core.utils.mailHost=smtp.gmail.com
   org.opennms.core.utils.smtpport=587
   org.opennms.core.utils.smtpssl.enable=false
   org.opennms.core.utils.authenticate=true
   org.opennms.core.utils.authenticateUser=XXXXXXX@gmail.com
   org.opennms.core.utils.authenticatePassword=XXXXXXX
   org.opennms.core.utils.starttls.enable=true
   org.opennms.core.utils.messageContentType=text/html
   org.opennms.core.utils.charset=UTF-8

Steps contributed by Pavan Ponamala

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