====== Step by step NSM with Trisul Network Analytics Docker image on RHEL 7.4======


This article describes how you can go from a bare install of RHEL7.4 to a fully running Trisul NSM system quickly.  


===== Install Docker CE on RHEL7.4 =====

Docker CE is not officially supported on RHEL 7.4 however you can install an earlier version quite easily from the packages released by Docker.  The following steps gets  an earlier version of Docker CE 17.03.02 installed.


<code bash>

yum install libtool-ltdl

rpm -ivh https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-selinux-17.03.2.ce-1.el7.centos.noarch.rpm

rpm -ivh https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-17.03.2.ce-1.el7.centos.x86_64.rpm

</code>



===== Start the Docker service =====

After installing Docker CE you need to start the service. 

<code bash>

systemctl start docker

</code>


===== Run TrisulNSM on eth0  =====

The following command starts the TrisulNSM Docker image with the following properties

  - Captures from interface ''eth0''
  - Stores persistent data in ''/opt/trisul6_root''
  - Names the container ''trisul1a'' for ease of use


<code bash>

sudo docker run --name=trisul1a  \ 
   --net=host -v /opt/trisul6_root:/trisulroot \
      --d trisulnsm/trisul6 \
          --interface  eth0

</code>