Hi Everyone, I think it's time to change our perception with network. Nowadays, Network Operating System be Trend for simplest and faster service delivery. There is a lot of NOS were researched, deployed, tested, due to achieve the Network Automatization concept

ONOS, Open Network Operating System, is a newly released open-source SDN controller that is focused on service provider use-cases. Similar to OpenDaylight, the platform is written in Java and uses Karaf/OSGi for functionality management. - SDNHub.org

The Open Network Operating System (ONOS) is a software defined networking (SDN) OS for service providers that has scalability, high availability, high performance and abstractions to make it easy to create apps and services. The platform is based on a solid architecture and has quickly matured to be feature rich and production ready. The community has grown to include over 50 partners and collaborators that contribute to all aspects of the project including interesting use cases such as CORD. - onosproject.org

I see there are a lot of tutorial build ONOS based debian os. And a little of them, make it above centos or RHEL. I just want to write my experience build onos  from scratch above centos os. I try to build it based on CENTOS 7. Because I installed Centos 7 with minimal install, so to build up the ONOS. I need some software that supported, like: wget, github, nmap, and also download karaf and maven,  because the platform is weitten in Java and the functinality management uses Karaf or you may fammiliar with OSGi (Open Service Gateway Initiative, refer this link to know more: http://www.javaworld.com/article/2077837/java-se/hello--osgi--part-1--bundles-for-beginners.html)

There are many tutorial ONOS installation, but they use ubuntu as Core OS. So, here, I want to try to build ONOS based on Centos 7. It's easy when you Install it from scratch. Below the installation flow, that I use to deploy ONOS om Centos 7:

  1. Install  Environment Tools
    In this step, we need successor tools to deploy ONOS, like wget and git (if you installed centos 7 with minimal install method)
    yum install -y wget net-tools
    yum install git -y

  2. Open port in firewalld for onos application:
    on Centos 7, there is firewalld was installed, you should open the ports that ONOS use to communicate with external network, the ONOS ports are:
    a. 8181 for web
    b. 6633 for listener
    c. 8081 for karaf console
    systemctl start firewalld
    firewall-cmd --zone=public --add-port=8181/tcp --permanent
    firewall-cmd --zone=public --add-port=6633/tcp --permanent
    firewall-cmd --zone=public --add-port=8101/tcp --permanent
    systemctl restart firewalld
    After that verifying, make sure those ports are allowed/opened
    firewall-cmd --zone=public --list-all
  3. Clone ONOS Project from git repository
    cd ~/
    git clone https://gerrit.onosproject.org/onos
    Check the branch master to update repo git
    cd onos
    git checkout master             # checks out 'master' as the working branch
    git pull --rebase origin master # pulls the latest code from Gerrit, and rebases any local changes onto origin/master
  4. Download Apache Maven and Karaf
    Create Folder Downloads and Application.
    cd ~
    pwd #make sure pwd under root
    mkdir Downloads Applications
    Download Apache Maven and Karaf
    cd Downloads
    wget http://archive.apache.org/dist/karaf/3.0.5/apache-karaf-3.0.5.tar.gz #download karaf 3.0.5
    wget http://archive.apache.org/dist/maven/maven-3/3.3.9/binaries/apache-maven-3.3.9-bin.tar.gz #download maven 3.3.9
    Unzip with Tar Apache Maven and Karaf to Application Folder
    tar -zxvf apache-karaf-3.0.5.tar.gz -C ../Applications/ #untar karaf to Applications/
    tar -zxvf apache-maven-3.3.9-bin.tar.gz -C ../Applications/ #untar maven to Application/  
    Editing Karaf
    add script "mvn:org.onosproject/onos-features/1.5.0-SNAPSHOT/xml/features" in  org.apache.karaf.features.cfg
    cd ~/Applications/apache-karaf-3.0.5/etc/
    vi org.apache.karaf.features.cfg
    Change the ip "" instances to "" in org.apache.karaf.management.cfg
    vi org.apache.karaf.management.cfg 
  5. Install JAVA 8
    Download JAVA 8
    wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u45-b14/jdk-8u45-linux-x64.rpm"
    Install JAVA 8
    rpm -ivh jdk-8u45-linux-x64.rpm
  6. bashsrc setting
    Adding ONOS parameter on JAVA environment to build up ONOS Module
    cat >> ~/.bashrc << EOF
    export ONOS_ROOT=~/onos
    source $ONOS_ROOT/tools/dev/bash_profile
    export JAVA_HOME=/usr/java/jdk1.8.0_45/
    export JRE_HOME=/usr/java/jdk1.8.0_45/jre/
    export KARAF_ROOT=/root/Applications/apache-karaf-3.0.5
    export M2_HOME=/root/Applications/apache-maven-3.3.9
    export ONOS_USER=root
    export ONOS_GROUP=root
    export ONOS_IP=w.x.y.z #Your IP Interface to reach ONOS
    source ~/.bashrc #need investigate
  7. Building ONOS
    cd ~/onos
    mvn clean install
    Packaging ONOS tar.gz or zip distributions after Build Complete

  8. Starting onos
    source tools/dev/bash_profile
    ok clean

    Open web GUI

    Username : karaf
    Password : karaf

    After login

    Access The console (Karaf console)

    ssh w.x.y.z@8101
    Username : karaf
    Password : karaf

Finally done, you can interop with your device, or test the functionality with mininet.