Patroni is a Python-based high-availability solution for PostgreSQL that uses a distributed configuration store — in this tutorial, etcd — to manage leader election, automatic failover, and cluster membership. On RHEL 8, both Patroni and etcd are available through the EPEL repository, making the installation straightforward. This guide walks through installing PostgreSQL, etcd, and Patroni, […]
Consul is a distributed service mesh and service discovery tool from HashiCorp that enables services to find each other by name rather than by hard-coded IP addresses and ports. On RHEL 8, Consul is available through the official HashiCorp dnf repository and integrates with systemd for process management. This tutorial covers installing Consul in server […]
Quality of Service (QoS) with the Linux traffic control subsystem (tc) gives you precise control over bandwidth allocation, latency, and scheduling for network interfaces on RHEL 8. Using the Hierarchical Token Bucket (HTB) queuing discipline you can guarantee minimum bandwidth to critical services, cap bandwidth for bulk transfers, and prioritize interactive traffic over background workloads. […]
Podman pods allow you to run multiple containers that share the same network namespace, mirroring the Kubernetes pod model without requiring a container orchestrator. On RHEL 8, Podman is available in the default AppStream repositories and provides native rootless pod support out of the box. This tutorial covers creating and managing pods, running multi-container workloads […]
StrongSwan is a robust open-source IPsec VPN solution that supports IKEv2 and is well-suited for site-to-site and remote-access VPN deployments. On RHEL 8, StrongSwan is available through the EPEL repository and integrates cleanly with firewalld and the system’s certificate infrastructure. This tutorial walks through installing StrongSwan, generating PKI certificates, configuring an IKEv2 road-warrior VPN, and […]
FreeIPA is Red Hat’s integrated identity management solution that bundles LDAP (389 Directory Server), Kerberos, DNS, NTP, and a certificate authority into a single coherent platform. It is the upstream project for Red Hat Identity Management (IdM) and is fully supported on RHEL 8. FreeIPA dramatically simplifies managing users, groups, hosts, and policies across a […]
Kerberos is a mature, ticket-based network authentication protocol that allows services and users to prove their identity to one another without transmitting passwords over the network. MIT Kerberos is the reference implementation and is packaged in RHEL 8’s default repositories. Setting up a Key Distribution Center (KDC) gives you a centralised authentication infrastructure that integrates […]
LDAP (Lightweight Directory Access Protocol) is the industry-standard protocol for centralised identity management, used to store and query user accounts, groups, and organisational data. OpenLDAP is the most widely deployed open-source LDAP server and is available in RHEL 8’s default repositories. Rather than a flat configuration file, modern OpenLDAP uses the on-line configuration (OLC) backend, […]
IPv6 adoption has accelerated as IPv4 address exhaustion becomes more acute, and most modern Linux servers must support both protocols simultaneously in a dual-stack configuration. RHEL 8 ships with full IPv6 support in the kernel and in NetworkManager, making dual-stack setup straightforward with nmcli. Firewalld and the major web servers handle IPv6 natively once the […]
Let’s Encrypt provides free, trusted TLS certificates, and Certbot is the official client for obtaining and renewing them automatically. On RHEL 8, Certbot is available through the EPEL repository and integrates tightly with both Nginx and Apache via dedicated plugins. Automating renewals with the built-in systemd timer ensures your certificates never expire without manual intervention. […]
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