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This article is the third part of our OpenStack series. In this tutorial, we will go through steps to launch an OpenStack instance from Horizon Dashboard. Prerequisites 1: Install Single Node OpenStack in CentOS 7 / RHEL 7 2: Configure OpenStack Networking to Enable Access to VM Instances Launch OpenStack Instance Before launching an instance, […]
In our last article, we set up Observium for monitoring servers and network devices. This guide focus on adding Linux machines to the Observium tool for monitoring. Prerequisites Setup Observium monitoring tool for your environment. READ: Install Observium on CentOS 7 / Ubuntu 16.04 Here, we will install and configure SNMP on the client servers […]
Observium is an open source, low-maintenance, auto-discovering network monitoring tool for operating systems and network hardware. It supports Linux and Windows operating systems and network hardware like Cisco, Juniper, Brocade, Foundry, HP. Observium is based on AMP (Apache, MySQL, and PHP) stack and it collects the monitoring metrics via SNMP protocol. It uses RRDtool to […]
This tutorial is the second part of our OpenStack series. In this tutorial, we will go through steps to configure OpenStack Networking to allow access to VM instances from external networks. Prerequisites Follow the below link to install OpenStack so that we can begin the network configuration. READ: Install Single Node OpenStack on CentOS 7 […]
When I was drafting an article about the installation of MongoDB on CentOS, I had to run semanage command to make a change in SELinux policy to allow us access to MongoDB on port 27017. semanage port -a -t mongod_port_t -p tcp 27017 To my surprise, I got an error. -bash: semanage: command not found […]