When your smart home goes down, all those clever automations that make your life easier stop working.There are some handy tricks that homelab users often use that help keep Home Assistant running or minimize the impact if it does go down.Related 5 ways to use a Raspberry Pi with Home Assistant (aside from running your server) It's time to repurpose your old Home Assistant server.
Posts 2 By Adam Davidson Invest in a UPS More power to you The best way to stop yourself from having to deal with issues when your Home Assistant server goes down is to keep it up as much as you can.If your power goes out, your server may go with it, unless you're running it on something with its own battery, such as a laptop.That's why an Uninterruptible Power Supply (UPS) can be a good investment.
This is a device that you connect between your server and your power outlet.In normal use, it passes power through to your devices, but if your power goes out, it will automatically switch to the internal battery, keeping your devices powered without shutting down.As well as your server, it's worth plugging a few other devices into your UPS.
Your router is usually a critical component of your smart home, and any network devices, such as Zigbee coordinators, would also benefit from uninterruptible power.Another major benefit is that you can use software such as Network UPS Tools or your own automations to monitor how much battery your UPS has left, and gracefully shut your Home Assistant server down if the UPS is getting close to running out of power.That way, there's less risk of your data being corrupted.
Know immediately when Home Assistant goes down You can also monitor key services Even with a UPS, your Home Assistant server may not stay up forever.A hardware issue or a software crash could cause it to shut down.The sooner you know about it, the less impact this will have.
Homelabs often use monitoring for key services so that you can get notified almost immediately if something goes down.The same applies to Home Assistant.You can use software such as Uptime Kuma running in a separate virtual machine or on a different device.
This will send regular checks to your Home Assistant instance, and if it doesn't hear back, it can notify you via methods such as email or Telegram.I have Uptime Kuma set up to monitor Home Assistant, but it also monitors other key services.I run the Node-RED flow-based automation software in a separate container, and Uptime Kuma monitors this as well, along with Zigbee2MQTT and my MQTT broker.
If any one of these services goes down, I'm notified right away so I can try to fix the problem.Take regular backups You can never back up too often If something does go wrong with Home Assistant, having a recent backup can help you get things back to a working state without too much fuss.Home Assistant includes native backup options, as well as useful add-ons such as Home Assistant Google Drive Backup that you can use.
I run Home Assistant in the Proxmox hypervisor, which gives me additional options.Using Proxmox, you can take a point-in-time snapshot of the system, which is a little like a quick save in a video game.If something stops working, you can reload the last working snapshot, and everything returns to how it was before.
Snapshots are great for quick rollbacks, and as with all backups, it's good practice to keep copies of these snapshots on a separate drive or in the cloud.If your entire server goes down, you'll still be able to access them.Decouple network coordinators If your server dies, your network doesn't have to Another useful trick is to keep your network coordinators separate from your main server.
For example, instead of connecting your Zigbee coordinator directly to your Home Assistant server, you can run Zigbee2MQTT on a separate device and connect the coordinator to that.This has multiple benefits, such as allowing you to place the coordinator in the optimal location in your home, but another major benefit is that if your Home Assistant server goes down, your Zigbee network doesn't.You can quickly restore a backup of Home Assistant on another device or virtual machine, point it at your coordinator, and be back up and running while you figure out what went wrong with your main server.
Don't rely on flaky storage SD cards are not a reliable option There's nothing inherently wrong with running Home Assistant on a Raspberry Pi.I did so for several years, and it was more than adequate for my needs.One thing that can cause problems, however, is running everything from an SD card.
Subscribe to the newsletter for Home Assistant resilience tips Get the newsletter to build a tougher smart home: step-by-step checklists for UPS and backups, monitoring configurations, and decoupling network coordinators.Subscribe for practical, hands-on Home Assistant and homelab guidance.Get Updates By subscribing, you agree to receive newsletter and marketing emails, and accept our Terms of Use and Privacy Policy.
You can unsubscribe anytime.Home Assistant does a lot of reading and writing, and SD cards aren't designed for this kind of use.It can eventually lead to the SD card failing, and while recent updates have reduced how much will get written to an SD card, the risk still exists.
If you're using a Raspberry Pi, you can connect a USB SSD instead of having to rely on an SD card.This will make it far less likely that your server will fail and lose all of your precious Home Assistant setup.It's impossible to keep your Home Assistant server running forever, but there are things that can help.
Ultimately, you need to be prepared for something to go wrong and be ready to get things back up and running as quickly as you can.
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