Drill Down into CentOS/RHEL Base Environment and Add-Ons Software Package Groups

At the Installation Summary Screen of CentOS7/RHEL7 (GUI mode), you can click on the Software Selection option to choose pre-defined groups of software packages to install with the operating system. These pre-defined groups are expressed in the form of a Base Environments, and their related Add-Ons. Each pre-defined group of software packages are related to […]

Setting up Centralized Logging with Auditd

In this post, I will talk about how to set up centralized logging using the Auditd daemon, and the audisp-remote plugin. Auditd is the Linux Audit daemon which is responsible for logging events that happen based on the rules defined. The Auditd daemon passes the event records to the audit dispatcher, called audisp. The audit […]

Docker Swarm with Cent OS 7

Recently, I have been trying to set up a Swarm Cluster with Cent OS 7. However, I met with some connectivity issues between the Swarm Manager and the Consul service discovery container. Using docker logs on the Swarm Manager, I got the following error: level=error msg=”Discovery error: Get http://192.168.56.102:8500/v1/kv/docker/swarm/nodes?consistent=: dial tcp 192.168.56.102:8500: getsockopt: no route to host” level=error msg=”Discovery error: […]