DEV Community: Alyssa Valdezz

Build a High-Availability Cluster with DRBD & Keepalived

Alyssa Valdezz — Thu, 10 Sep 2026 05:19:29 +0000

When architecting for zero downtime, application-layer replication often introduces race conditions and split-brain scenarios. A cleaner, more resilient pattern for two-node active-passive failover is kernel-level block replication using DRBD combined with Keepalived for VRRP IP migration.

[ Clients ]
│
▼
[ Floating Public VIP: 203.0.113.100 ]
│
├──► (Active) Node1 (Primary) ──[DRBD Sync Protocol C]──► Node2 (Secondary)
│ Disk: /dev/drbd0 ──── (Private Network) ───► Disk: Raw Standby
│
└──► (Failover) Node2 Promoted to Primary & Takes VIP on Node1 Crash

Key Architectural Steps:

Raw Storage Wipe: Clean raw partitions (/dev/nvme1n1) on both nodes using wipefs.
DRBD Protocol C Config: Define global resources in /etc/drbd.d/data.res specifying synchronous network writes over internal private IPs.
Keepalived Event Scripts: Write /etc/keepalived/master.sh and backup.sh bash hooks that invoke drbdadm primary and mount /dev/drbd0 dynamically during failover state changes.

Full Technical Guide:
Read our complete configuration, initialization steps, and failover validation test suite:
🔗 https://www.epyhost.com/tutorials/howto/build-ha-cluster-drbd-keepalived/

Architecting for Europe: High-Performance Dedicated Servers in Frankfurt

Alyssa Valdezz — Wed, 09 Sep 2026 05:57:44 +0000

When building applications that serve a massive European user base, routing traffic through edge locations can introduce unacceptable latency. You can bridge this gap by deploying dedicated servers directly at the continent's digital center: Frankfurt, Germany.

Infrastructure Highlights at EPY Host:

Strategic Central Node: Frankfurt is home to some of the largest internet exchanges in the world, heavily optimizing traffic for demanding enterprise and financial workloads.
Custom Deployments: Tailor your hardware to your specific needs. Build out multi-core compute nodes with extensive NVMe/SSD storage arrays.
Compliance First: Your infrastructure benefits from strict German data sovereignty and GDPR privacy frameworks.
Enterprise Networking: Leverage 10 Tbps of network connectivity on Tier-4 multi-homed connections with built-in DDoS mitigation handling attacks up to 250 Gbps.
Rapid Control: Gain full root access within 4 hours of deploying your Frankfurt server.

Whether you need high-bandwidth streaming or massive database hosting, EPY Host gives you the flexibility of month-to-month billing.

Explore the hardware options here:
🔗 https://www.epyhost.com/dedicated-servers-germany/frankfurt/

Architecting for North America: High-Performance Dedicated Servers in Dallas

Alyssa Valdezz — Tue, 08 Sep 2026 04:42:40 +0000

When building applications that serve the entire United States, selecting an East Coast or West Coast data center can introduce latency for users on the opposite side of the country. Dallas is a premier hub for dedicated server hosting due to its central U.S. location and carrier-neutral fiber infrastructure.

Infrastructure Highlights at EPY Host:

Custom Deployments: Select from instant-deployment configurations featuring robust Intel Xeon, AMD Ryzen, or AMD EPYC processors.
Enterprise Storage: Build out your compute nodes with high-speed NVMe storage and extensive HDD options.
Enterprise Networking: Deploy instantly with premium BGP routing and port speeds up to 20Gbps.
Billing Flexibility: Scale your environment up or down using convenient monthly billing cycles.

Explore the hardware options here:
🔗 https://www.epyhost.com/dedicated-servers-usa/dallas/

Architecting for the Mediterranean: High-Performance Dedicated Servers in Malta

Alyssa Valdezz — Fri, 04 Sep 2026 07:56:01 +0000

When building applications that serve both Southern Europe and North Africa, centralized northern data centers can introduce unacceptable latency. You can bridge this gap by deploying dedicated servers directly in Malta.

Infrastructure Highlights at EPY Host:

Strategic Edge Nodes: Choose deployments in Handaq, Kalkara, or Madliena. These data centers are heavily optimized for demanding workloads in the iGaming and Fintech sectors.
Custom Deployments: Tailor your hardware to your specific needs. Build out multi-core Intel Xeon compute nodes with extensive SAS/SSD storage arrays.
Compliance First: Your infrastructure benefits from strict GDPR privacy frameworks, ensuring secure data handling.
Enterprise Networking: Leverage unmetered bandwidth on Tier-4 multi-homed connections with built-in DDoS mitigation handling attacks up to 250 Gbps.

Whether you need high-bandwidth streaming or massive database hosting, EPY Host gives you the flexibility of month-to-month billing with no long-term contracts.

Explore the hardware options here:
🔗 https://www.epyhost.com/dedicated-servers-malta/

Architecting for APAC: High-Performance Dedicated Servers in India

Alyssa Valdezz — Fri, 04 Sep 2026 07:27:26 +0000

When building applications for a South Asian user base, routing traffic to European or North American servers creates severe data congestion and raises latency. You can solve this instantly by positioning your applications closer to your customers—deploying dedicated servers directly in India.

Infrastructure Highlights at EPY Host:

Custom Deployments: Tailor your hardware to your specific needs. Choose from legacy single-threaded setups, quad-core web servers, or extreme compute nodes powered by AMD EPYC and Ryzen processors.
Rapid Root Access: Gain full control within 4 hours of deploying your India server, thanks to our root access feature.
Distributed Edge: Deploy precisely where you need it, with available nodes in Mumbai, New Delhi, Kolkata, Hyderabad, Chennai, Bangalore, Pune, Noida, and Vaishali.
Enterprise Security: Built-in Tier-4 multi-homed connectivity includes DDoS mitigation that handles attacks on layers 3/4/7 up to 250 Gbps.

Whether you need high-bandwidth streaming, massive database hosting, or extensive virtualization, EPY Host gives you the flexibility of month-to-month billing with no long-term contracts.

Explore the hardware options here:
🔗 https://www.epyhost.com/dedicated-servers-india/

Architecting for Europe: High-Performance Dedicated Servers in Germany

Alyssa Valdezz — Thu, 03 Sep 2026 08:18:47 +0000

When building applications for a European user base, minimizing network latency and ensuring strict GDPR compliance are critical. You can position your applications closer to your European customers by deploying dedicated servers in Frankfurt and Dusseldorf, Germany.

Infrastructure Highlights at EPY Host:

Custom Deployments: Tailor your hardware to your specific needs, choosing from SSDs, hardware RAID, and additional RAM.
Rapid Root Access: Gain full control within 4 hours of deploying your server, thanks to our root access feature.
Massive Network Capacity: The network backbone features a total of 10 Tbps of network connectivity, relying on Tier-4 multi-homed, fully fiber-connected providers.
Advanced Privacy: Germany data centers offer advanced data privacy measures to ensure your data is securely handled.

Whether you need high-bandwidth streaming, massive database hosting, or extensive virtualization, EPY Host gives you the flexibility of month-to-month billing with no long-term contracts.

Explore the hardware options here:
🔗 https://www.epyhost.com/dedicated-servers-germany/

Architecting for Europe: High-Performance Dedicated Servers in Amsterdam

Alyssa Valdezz — Thu, 03 Sep 2026 07:44:18 +0000

When building applications for a European user base, minimizing network latency is critical. You can position your applications closer to your European customers by deploying dedicated servers in Amsterdam, the Netherlands.

Infrastructure Highlights at EPY Host:

Custom Deployments: You can tailor your hardware to your specific needs, choosing from SSDs, hardware RAID, and additional RAM.
Rapid Root Access: Gain full control within 4 hours of deploying your Amsterdam server, thanks to our root access feature.
Massive Network Capacity: The network backbone features a total of 10 Tbps of network connectivity, relying on Tier-4 multi-homed, fully fiber-connected providers.
Enterprise Security: Built-in DDoS mitigation handles attacks on layers 3/4/7 up to 250 Gbps.

Whether you need high-bandwidth streaming, massive database hosting, or extensive virtualization, EPY Host gives you the flexibility of month-to-month billing with no long-term contracts.

Explore the hardware options here:
🔗 https://www.epyhost.com/dedicated-servers-netherlands/

Data Sovereignty and GDPR: Architecting Compliant Infrastructure in Europe

Alyssa Valdezz — Fri, 14 Aug 2026 09:49:10 +0000

As developers and systems architects, we are used to abstracting away the physical hardware. We spin up instances in "eu-central" or "us-east" without thinking too deeply about the physical dirt those data centers are built on.

But from a compliance perspective, the physical location of your infrastructure is the most critical architectural decision you will make.

The Illusion of the Borderless Cloud
The hard drives that store your databases reside within the sovereign borders of nation-states. That means your data is subject to the subpoena powers and surveillance mandates of those countries.

If you are building applications for European users, you must understand Data Sovereignty.

The Compliance Conflict
If you host EU data on US-based infrastructure, you are subject to the US CLOUD Act. This allows US law enforcement to compel providers to hand over data, often bypassing European legal frameworks. However, the GDPR strictly prohibits exposing EU data to foreign entities without equivalent protections.

By storing EU data in the US, you place your architecture in direct conflict with EU law.

Choosing the Right European Node
The definitive way to solve this is by utilizing dedicated bare metal infrastructure physically located within the EU. But you still need to choose the right jurisdiction:

Germany: Known for some of the strictest data privacy laws in the world, making it the gold standard for GDPR compliance.
France & The Netherlands: Offer incredible global routing, high-performance internet exchanges, and strong EU legal protections.

We have published a comprehensive technical and legal breakdown of how to navigate these choices when provisioning your next server environment.

Read the full architectural guide on EPY Host:
🔗 https://www.epyhost.com/blogs/choose-the-right-european-data-center/

How to Build a Custom DDoS Scrubbing Gateway with eBPF & FRR

Alyssa Valdezz — Fri, 14 Aug 2026 08:31:09 +0000

When dealing with volumetric DDoS attacks, traditional packet filtering is fundamentally flawed. If you rely on iptables or nftables, every packet has to be allocated an sk_buff struct in the Linux kernel before it can be evaluated and dropped. When you are being flooded with millions of packets per second (Mpps), this overhead causes instant CPU exhaustion.

To survive, you have to move your packet filtering lower in the stack.

Building a Scrubbing Node
In this tutorial, we explore how to build a dedicated DDoS scrubbing gateway using an EPY Host bare metal server. We bypass traditional firewalls by utilizing eBPF (Extended Berkeley Packet Filter) and XDP (eXpress Data Path).

XDP hooks directly into the network device driver. By loading custom eBPF programs here, we can evaluate and return XDP_DROP for malicious packets before the kernel even knows they exist.

Combined with FRRouting (FRR) to manage BGP and steer your subnets into the scrubbing node, you can create a highly resilient infrastructure capable of absorbing massive volumetric attacks.

What you will learn:

Setting up the EPY Host high-bandwidth environment.
Configuring FRR for traffic steering.
Writing and attaching eBPF/XDP programs for ultra-fast packet dropping.

Dive into the code and configuration:
🔗 https://www.epyhost.com/tutorials/howto/build-ddos-scrubber-ebpf-frr/

Architecting for APAC: Why You Should Deploy Bare Metal in Singapore 🇸🇬

Alyssa Valdezz — Sat, 25 Jul 2026 11:17:08 +0000

A technical breakdown of Asian routing and high-throughput networking.

When designing network topologies for a user base spanning India, Southeast Asia, and Australia, geographic positioning at submarine cable landing points is paramount. Deploying a bare metal server singapore node offers a highly compelling edge over hosting anywhere else in the region.

Here is the technical advantage of Singapore data centers:

Subsea Routing: Sub-30ms to Vietnam and <50ms to Southern India via direct ocean fiber.
Massive Throughput: Easily deploy high-bandwidth infrastructure, scaling up to a 50gbps dedicated server or 100Gbps unmetered for big data.
Hardware Scaling: Perfect environment for gaming networks (Ryzen 9) and GPU compute (Nvidia RTX/Tesla).
Security & Peering: Custom BGP peering support and automated L3-L7 Anti-DDoS scrubbing.

Read the full architectural guide on our deployment page.

Link: https://www.epyhost.com/dedicated-servers-singapore/

Architecting for the Americas: Why You Should Deploy Bare Metal in Miami 🌴

Alyssa Valdezz — Wed, 22 Jul 2026 09:20:28 +0000

A technical breakdown of LATAM routing and high-throughput networking

When designing network topologies for a user base spanning the US and Latin America, geographic positioning at submarine cable landing points is paramount. Deploying Miami dedicated servers offers a highly compelling edge over traditional mid-west hosting.

Here is the technical advantage of Miami data centers:

Submarine Routing: Sub-50ms to Northern South America via direct ocean fiber.
Massive Throughput: Easily deploy a Miami 10 gbps dedicated server, scaling up to 100Gbps unmetered for big data.
Hardware Scaling: Perfect environment for game server hosting miami (Ryzen 9) and GPU compute (Nvidia RTX).
Security: Every node is a ddos protected dedicated server miami setup (L3-L7 automated scrubbing).

Read the full architectural guide on our deployment page.

Link: https://www.epyhost.com/dedicated-servers-usa/miami/

Architecting for the US: Why You Should Deploy Bare Metal in Denver 🏔️

Alyssa Valdezz — Wed, 22 Jul 2026 08:11:23 +0000

A technical breakdown of central US routing and latency

When designing network topologies for a nationwide US user base, geographic centralization is paramount to balancing latency. Deploying Denver dedicated servers offers a highly compelling edge over traditional coastal hosting.

Here is the technical advantage of Denver data centers:

Balanced Routing: Sub-30ms to the West Coast and optimized peering to the East Coast.
Massive Throughput: Easily deploy a 10G dedicated server in Denver, scaling up to 100Gbps unmetered for big data.
Hardware Scaling: High-altitude cooling perfectly supports dense AMD EPYC architectures and massive NVMe arrays.
Management: Full root access or expert server management Denver services available.

Read the full architectural guide on our deployment page.

Link: https://www.epyhost.com/dedicated-servers-usa/denver/