this post was submitted on 29 Jan 2025
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Reverse proxy without a single point of failure (lemmy.sdf.org)
submitted 2 days ago by [email protected] to c/selfhosted
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I'm thinking of expanding my homelab to support running some paid SaaS projects out of my house, and so I need to start thinking about uptime guarantees.

I want to set up a cluster where every service lives on at least two machines, so that no single machine dying can take a service down. The problem is the reverse proxy: the router still has to point port 443 at a single fixed IP address running Caddy, and that machine will always be a single point of failure. How would I go about running two or more reverse proxy servers with failover?

I'm guessing the answer has something to do with the router, and possibly getting a more advanced router or running an actual OS on the router that can handle failover. But at that point the router is a single point of failure! And yes, that's unavoidable... but I'm reasonably confident that the unmodified commodity router I've used for years is unlikely to spontaneously die, whereas I've had very bad luck with cheap fanless and single-board computers, so anything I buy to use as an advanced router is just a new SPOF and I might as well have used it for the reverse proxy.

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[–] WagyuSneakers 1 points 6 hours ago (1 children)

I've done the on prem design. I've migrated people entirely to the cloud. I specialize a little in between.

Without any shred of doubt the cloud is going to be more cost effective than self hosting for 99% of all use cases. They're priced that way intentionally. You cannot compete with Cloudflare/AWS/GCP/Vultr/Akami/Digital Ocean/etc.

My homelab isn't about scaling, production workloads and definitely isn't accessible to anyone but me. I'd argue using it in any other way defeats the purpose and shows a lack of understanding.

[–] [email protected] 0 points 5 hours ago

The cloud is cheaper hosting things like websites that need HA. However if you are doing big compute or storing lots of data it will not be cheaper.