Troubleshooting CARP Failover When Secondary Stays in BACKUP State on pfSense
Learn why a pfSense CARP secondary stays in BACKUP when the primary is offline and how to diagnose and fix the issue.
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DigitalOcean Managed PostgreSQL: Minimal HA Design for a Private‑Networking Microservice
Build a fault‑tolerant microservice database on DigitalOcean Managed PostgreSQL. This guide covers the smallest viable architecture, private networking, daily backups, automatic failover, and operational checks to keep the service online.
digitaloceanOptimizing Backend Traffic with NGINX Upstream Blocks
Stop relying on a single backend IP. Learn how to use NGINX upstream blocks to distribute traffic, handle server failure, and optimize resource use with weight and least_conn.
nginx
Designing a Minimal Oracle Data Guard Physical Standby for HA/DR
Learn the requirements, smallest viable architecture, trust boundaries, key operational checks, and failure modes for a basic Oracle Data Guard standby in maximum performance mode.
Configuring pfSense High Availability with CARP for Firewall Failover
Step‑by‑step guide to configure pfSense HA with CARP, including prerequisites, VIP configuration, XMLRPC sync, verification, and failover recovery.
Selecting RabbitMQ HA Queues: Classic Mirrored vs. Quorum Queues
Decision guide for RabbitMQ high-availability: compare Classic Mirrored vs. Quorum queues, analyze Raft-based consistency trade-offs, and validate automatic failover.
rabbitmqChoosing the Right Datastore for K3s: SQLite vs. External DBs
K3s replaces etcd with SQLite by default to reduce overhead. Learn when to stick with SQLite for edge simplicity and when to migrate to an external database for high availability.
k3sMigrating to RabbitMQ Quorum Queues for Data Consistency
Learn how to implement RabbitMQ Quorum Queues using the Raft algorithm to ensure data consistency and high availability over legacy mirrored queues.
Configuring K3s High Availability with Embedded etcd
Learn how to implement K3s High Availability using embedded etcd to eliminate control plane single points of failure and ensure cluster resilience.
kubernetes