High availability is the homelabbing trick everyone should know about


Downtime is the enemy of any homelab—mine especially. So, I finally decided to do something about it and made my homelab highly available. I only was able to do that because I already knew about it, so, if you’ve never heard of high availability, here’s why you should know about this unique trick.

There’s always maintenance to do in a homelab

And I always push maintenance off to have as little downtime as possible

Inside of a Dell R720xd storage server with all of the RAM slots populated. Credit: Patrick Campanale / How-To Geek

When I first started homelabbing, I was performing maintenance on my server quite often. From RAM changes to fixing operating system issues, swapping storage, or installing new hardware, my server was down more than it was online.

Having my server be down so much early on made me hesitant to host critical services on my own hardware, so I initially pushed those thoughts down the road until things started to settle. Eventually, I got in the groove with my servers and maintenance became something that didn’t happen nearly as often.

The problem is, there still is always something to maintain in a homelab. It could be relocating servers, putting in a new networking card, adding more RAM, installing a graphics card, or simply changing the IP on your network. Heck, even operating system or security updates on the server count as maintenance—and I almost always push my maintenance off for as long as I can.

Why do I push my maintenance off? Because it still means downtime, and both I and the others in my household have come to rely on the server’s uptime. So, I have to schedule maintenance and downtime when there is nobody on the server, and that’s just a hassle—so I finally deployed a high availability cluster in my homelab to solve the problem.

High availability makes maintenance seamless

Services automatically move to the next available node

The inside of the GEEKOM A5 mini PC showing user-replaceable RAM and SSDs. Credit: Patrick Campanale / How-To Geek

If you’ve never heard of high availability, it’s the one trick that every homelabber should at least know about. Essentially, you have to have three or more servers (it works best with an odd number of servers) that are joined together in a cluster. These servers have to have one central storage location that they all share, and a NAS works perfect for that.

It’s best to distribute the services that you self-host across all the nodes so that way no one node is running everything—that defeats the purpose of high availability. Whenever one node goes offline, the services that were running on that node simply get spun up on another node in the stack.

This happens through a process called quorum. Basically, when a system goes offline, the other systems in the cluster will “vote” to see who gets the services that still need to be online. Then, that virtual machine or container which is no longer accessible as its host is offline, goes online on whichever node won the vote.

The Zettlab D4 NAS with a Geekom A5 mini PC and TerraMaster F4 SSD NAS on a wooden shelf.


You probably don’t need a NAS: Why a DAS is better for most people

Not sold on a NAS? Get a DAS instead

Eventually, when the node you’re doing maintenance on comes back online, the virtual machines or containers that were on it are migrated back and nothing misses a beat.

Depending on your hardware (and what operating systems or services you’re running), downtime here can be anywhere from a few seconds to a minute. Basically, however long it takes the virtual machine or container to boot up.

High availability doesn’t really kick in for simple things like a VM reboot, but it’s perfect for when you need to swap hardware or if you’re moving the location of your homelab from one area to another.

Your homelab acts as one big server, but there’s one big catch

Not every service should be made highly available

With high availability, your homelab essentially acts as one big system that just passes virtual machines or containers back and forth. However, it’s not without its faults.

I run Plex in my homelab, and that’s one service that I won’t make highly available. While it would be the perfect service to have highly available, it just doesn’t work well when in an HA cluster.

Plex relies heavily on metadata and hardware transcoding. As such, it’s constantly writing or rewriting files, and it needs dedicated hardware passed through to it.

While possible, it can be quite difficult to set up PCIe passthrough of a graphics card (either internal graphics or dedicated) to a virtual machine and have that same hardware be available on another system.

Four hard drivers sticking out of a rack-mount server that's being used as a NAS.


Thinking of Starting a Homelab? You Need a NAS

No homelab is complete without one.

Let’s say you have three old office PCs which all have slightly different specs and generations of processors. The passthrough hardware IDs of the integrated graphics of those PCs is going to be different, which makes the Plex and VM configuration hard to have highly available.

Plus, the Plex Docker configuration can sometimes require UUIDs of hardware to be passed through from the host to work, or even configured in the Plex settings UI. Both of these things make high availability setups pretty difficult to configure.

However, high availability is perfect for services that don’t require hardware passthrough. Think Audiobookshelf, Pi-hole, FreshRSS, Minecraft servers, websites, and more—basically anything that doesn’t rely on dedicated hardware being passed through to a VM, and then to a container.

  • ACEMAGIC M5 mini PC.

    Brand

    ACEMAGIC

    CPU

    i7-14650HX

    The ACEMAGIC M5 mini PC is perfect for setups that need a high-performance desktop with a small footprint. It boasts the Intel i7-14650HX 16-core 24-thread processor and 32GB DDR4 RAM (which is upgradable to 64GB). The pre-installed 1TB NVMe drive can be swapped out for a larger one though, and there’s a second NVMe slot for extra storage if needed.


  • KAMURI Hyper H2 Mini PC.

    Brand

    KAMURI

    CPU

    i5-14450HX

    The KAMRUI Hyper H2 Mini PC features an Intel Core i5-14450HX 10-core 16-thread processor and 16GB of DDR4 RAM. The included 512GB NVMe SSD comes with Windows 11 pre-installed so the system is ready to go out of the box.


  • GEEKOM A5 mini PC.

    Brand

    GEEKOM

    CPU

    AMD Ryzen 5 7430U

    Graphics

    AMD Vega 7

    Memory

    16GB DDR4 SO-DIMM

    Storage

    512GB NVMe (expandable)

    The GEEKOM A5 mini PC packs 16GB of user-replaceable RAM, a user-swappable NVMe SSD, plus two other storage slots, giving you plenty of user-upgradability in this compact system. The Ryzen 5 processor packs plenty of power for general tasks, and it’s even great at lightweight gaming and CAD work too.



High availability isn’t for everyone, but it’s worth knowing about

Running a highly available setup in a homelab isn’t for the faint of heart. You really need to have at least three similar computers that you plan to keep on 24/7/365 for it to work well. This is a bit out of reach for those just getting started in homelabbing, and that’s okay.

I ran my homelab without high availability for over half a decade before I finally had the hardware to get a three node cluster online. Even then, I didn’t have every virtual machine set up for high availability, only the ones that I really couldn’t stand going down.

You might not deploy high availability in your homelab right now, but you definitely should know about it and at least have it in your back pocket for when you do have a setup capable of handling it.



Source link

Leave a Reply

Subscribe to Our Newsletter

Get our latest articles delivered straight to your inbox. No spam, we promise.

Recent Reviews


For three decades, the Subaru Outback has occupied a unique corner of the automotive world, carving out a niche that sits comfortably between a family wagon and a mountain-climbing SUV. With over three million sold since its debut, the Outback has become the literal and figurative utility player of the Subaru lineup.

Now entering its seventh generation, the 2026 Outback arrives when the average new vehicle price is at an all-time high, yet Subaru has kept its starting MSRPs reasonable, even dropping them in some instances. If you’re cross-shopping the Outback against other mid-size crossovers, here are the six best things about the 2026 Subaru Outback.

6

Affordable

High-value MSRP relative to the national average

One of the most compelling arguments for the 2026 Outback is its value proposition. While the average price of a new vehicle is hovering around or above $50,000, the Outback starts significantly lower.

The entry-level Premium begins at $36,445 (including destination), a figure that undercuts many rivals while still including standard all-wheel drive and a comprehensive suite of tech and safety features. Even the feature-heavy Touring XT and Wilderness trims typically stay under that $50,000 national benchmark, making the Outback a financially savvy choice for families.

Here is a fast trim level breakdown. The starting MSRP figures include the $1,450 destination fee.


2026-subaru-outback-wilderness-exterior-2-1.jpeg

subaru-logo.jpeg

Base Trim Engine

2.5-liter four boxer

Base Trim Transmission

CVT

Base Trim Drivetrain

All-Wheel Drive



Premium

Starting MSRP: $36,445

  • Heated seats.
  • Black rear badging.
  • Cargo tonneau cover.
  • Leather-wrapped steering wheel
  • Power rear gate w/ automatic close.
  • Removable rear trailer hitch bumper cover.
  • 18-inch aluminum-alloy wheels w/ dark gray finish.

An optional package for the Premium adds rain-sensing wipers, cloud-based navigation, a wireless smartphone charger, a heated steering wheel, and a moonroof for $2,270.

Limited

Starting MSRP: $43,165

  • Navigation.
  • Power moonroof.
  • Harman Kardon stereo.
  • Wireless smartphone charger.
  • Heated rear seats and steering wheel.
  • 18-inch aluminum-alloy wheels w/ matte black finish.
  • Perforated leather-trimmed upholstery w/ khaki stitching.

Touring

Starting MSRP: $46,845

  • Ventilated front seats.
  • Surround view monitor.
  • Lumbar and thigh support for the driver’s seat.
  • 18-inch black and machine-finish aluminum-alloy wheels.
  • Java Brown or Slate Black Nappa leather-trimmed perforated upholstery.

Limited XT

Starting MSRP: $45,815

  • Dual exhaust.
  • Surround view monitor.
  • 19-inch aluminum-alloy wheels w/ black finish.

Touring XT

Starting MSRP: $49,445

  • Includes all the features of the Touring, but with the higher-output 2.4-liter Boxer turbo.

Wilderness

Starting MSRP: $46,445

  • All-weather floormats.
  • Wireless smartphone charger.
  • 9.5 inches of ground clearance.
  • Electronically controlled dampers.
  • All-terrain Bridgestone Dueler tires.
  • Anodized copper exterior and interior accents.
  • 17-inch aluminum-alloy wheels w/ matte black finish.
  • Ladder-style roof rails w/ crossbar placement measurement markers.

Two optional packages are available for the Outback Wilderness. The first adds a moonroof, navigation, and a surround-view monitor for $2,045.

The second includes those, plus Nappa leather seats with copper stitching, ventilated front seats, a 12-way power-adjustable driver’s seat, and an eight-way power-adjustable passenger seat for an additional $4,090.

2026 Subaru Forester Hybrid driving on a dirt trail


2026 Subaru Forester Hybrid defies trends with a surprising $1,800 price drop

581-mile range, standard AWD, and updated safety features.

5

Two capable powertrain options

Standard Symmetrical AWD

Close-up shot of the engine under the hood of a 2026 Subaru Outback. Credit: Subaru

Two Boxer (i.e., horizontally opposed) engines are available for the 2026 Outback, depending on the trim level. Premium, Limited, and Touring feature a naturally aspirated 2.5-liter four-cylinder with 180 horsepower (5,800 rpm) and 178 lb-ft. of torque (4,800 rpm).

Limited XT, Touring XT, and Wilderness have a 2.4-liter turbocharged four-cylinder with 260 horsepower (5,600 rpm) and 277 lb-ft. of torque (2,000 to 4,800 rpm). Despite being a turbo engine with a higher power output, it does not require premium fuel.

Both engines are paired to a Lineartronic CVT (continuously variable transmission) with an eight-speed manual shift mode and Subaru’s Symmetrical All-Wheel Drive system.

The X-MODE system is also standard, which can be used on a muddy path, a gravel road, or during a snowstorm. X-MODE uses the same sensors as the Symmetrical All-Wheel Drive system, making additional adjustments to the Outback to ensure the best possible traction.

4

Significant tech leap with Snapdragon power

Owners can create individual profiles

Subaru has addressed the issue of infotainment lag, one of the biggest complaints from previous owners. The 2026 Outback features an all-new infotainment system, with navigation map swipe now up to three times faster, audio screen transitions up to six times faster, and overall scroll response up to two times faster. Notable updates and improvements include:

  • Optimized Display: A 12.1-inch higher-resolution touchscreen replaces the previous 11.6-inch unit. The screen reduces unwanted glare and light reflections by up to 80%.
  • Better Graphics: Powered by a Snapdragon 8 Automotive Processor, it features an octa-core architecture and an Adreno GPU.
  • More Memory: Approximately 2.5 times faster computing performance, with memory doubled from 4 GB to 8 GB and storage expanded from 64 GB to 128 GB.
  • Connectivity: Supports wireless Android Auto and Apple CarPlay, HD Radio, Bluetooth phone and audio streaming, Google Built-in services (Google Assistant/Maps), and automatic updates.
  • Personalization: Owners can create individual profiles and configure the 12.3-inch digital gauge cluster to highlight certain features and information. The 12.3-inch cluster is also new for the 2026 Outback.

While the overhauled infotainment system is a selling point, one current 2026 Outback owner has reported that Apple CarPlay functionality and the wireless charging pad don’t always work as intended.

AstroAI Battery-powered Tire Inflator.

Brand

AstroAI

Capacity

Up to 8 car tires (single charge)

This AstroAI mini tire inflator is perfect for keeping in your glove box when traveling. It’s portable and battery powered, meaning you don’t have to plug it in to use it. Plus, you’re able to set the exact tire pressure you want it to inflate to and it’ll automatically stop when it reaches that pressure. 


3

Return of physical climate controls

Small things add up

2026 Subaru Outback interior (5) Credit: Subaru

In a rare move that prioritizes driver ergonomics over minimalist trends, Subaru has brought back physical buttons and knobs for the climate control system. While the large 12.1-inch screen handles navigation and media, the often-used functions, like cabin temperature and fan speed, can now be adjusted by feel without taking your eyes off the road.

According to the J.D. Power 2025 U.S. Initial Quality Study, infotainment touchscreens are the study’s most problematic category, with consumers expressing a general dislike for what is sometimes described as “infotainment creep.” Subaru’s decision to have physical buttons for some of the most common vehicle functions is a small change that buyers are likely to appreciate.

2006 Saab 9-5 interior


Before touchscreens became the standard, BMW, Saab, and Lexus got it right

Better than a generic tablet glued to the dashboard.

2

Advanced “hands-off” driving system

Using GPS and 3D maps

Every 2026 Outback is standard with Subaru’s EyeSight package, which includes active safety features such as haptic steering wheel alerts, automatic emergency steering, lane keep assist, blind-spot and rear cross-traffic warnings, and reverse automatic braking.

Also standard is a feature called Emergency Stop Assist, which will stop the 2026 Outback if the driver becomes unresponsive while using the adaptive cruise control. Once stopped, the Outback can activate the hazard lights, unlock the doors, and call 911.

The Touring and Touring XT are standard with Highway Hands-Free Assist. Using GPS data and 3D high-definition maps, the system can manage steering, braking, and lane changes on compatible highways with an attentive driver. Highway Hands-Free Assist does require an active MySubaru Companion or Companion+ subscription, which typically includes a five-year trial for 2026 models.

1

Genuine off-road capability

Plenty of ground clearance

Static front 3/4 shot of a blue 2026 Subaru Outback Wilderness. Credit: Subaru

Unlike many “soft-roaders” that simply add plastic cladding, the 2026 Outback offers hardware that backs up its muscular look, especially with the Wilderness model.

Every Outback comes with at least 8.7 inches of clearance to begin with, but the Wilderness trim bumps that to 9.5 inches. Combine that with the all-terrain Bridgestone Dueler tires, electronically controlled dampers, all-weather floormats, and ladder-style roof rails, and the 2026 Outback Wilderness is the ideal weekend getaway vehicle.

Wilderness models also have a variation of X-MODE called Dual Mode, which includes specific settings for snow, dirt, and mud, along with hill descent control.

Salesperson in a dealership showroom handing a family keys to a new car.


3 insider tricks to get VIP treatment at any car dealership

Red carpet treatment, even if you buy something used.

Charitable causes and factory warranty

While the 2026 Subaru Outback makes a strong case for itself through an optimized infotainment system and rugged hardware, the ownership experience extends beyond the driver’s seat. For many buyers, the appeal of a Subaru lies in the brand’s alignment with social and environmental causes.

A prime example is the Subaru Love-Encore program launched in partnership with Gifts for Good. The program invites new customers back to the Subaru dealer about two weeks after purchase to meet with a staff member who can answer any questions they have about their new Subaru.

At that time, customers can choose either a mission-aligned product or direct the gift’s value to charity. Each physical gift is an ethically sourced product that comes with a story card, so customers can read about the impact the gift selection has made. Customers also have the option to redeem the gift’s value towards a charitable cause.

Every 2026 Subaru Outback has a three-year/36,000-mile bumper-to-bumper warranty and a five-year/60,000-mile powertrain warranty.



Source link