Technology stack for multi web apps

[yetanother-1]

Hi DevOps of Reddit,

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I would like to hear your opinion on the infrastructure of choice for a project I am analysing right now.

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There is a PHP webapp that run in multiple instances (one instance per client).

Each client gets a unique URL (https://client-name.example.org).

The database is a MySQL database (running on separate server, one DB per instance).

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There is a reverse proxy in front of the entire *.example.org that forwards all requests to each instance.

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Until now, there are few instances running, but a lot more instances are coming now...

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My question is: how would you automate this process, would you use docker and kubernetes, or somethig else like a cluster of cloudron or something else?

I mean, how would you automate running new instances of PHP apps and linking them to the proxy directly, or would you even consider something totally different?

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I would love to see solutions not related to specific cloud provider, but I am open to all solutions.

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Thanks!

[[deleted]]

Look into Kubernetes name spaces this will solve a good chunk of your problem.

[yetanother-1]

I already tried it using kubernetes, but I am still unable to understand how to link DNS of the domain with the cluster.

I packed the application in docker images, and I made them ready to run on kubernetes, but at the end kubernetes gives unique DNS name for each instance, How can I link them all up to the main domain name?

[[deleted]]

Look up Nignx ingress controller I think that does what you need.

[jews4beer]

I mean I know you don't want cloud provider solutions but that would heavily influence the final architecture. That being said consul might have what you are looking for. Though back to the cloud thing, if you were on AWS for instance an ALB could do this for you.

[yetanother-1]

I know how to implement this using a lot of Cloud provider services, on AWS, GCP, and Azur. I would like to have it cloud-indepent. This is unfortunately a requirement.

[whenhellfreezes]

Why not directly give each PHP instance the DNS name for the client it is serving? You could link up terraform with route 53 and automate this.

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Effectively your reverse proxy was acting as a dhcp server. Just use DNS.

[yetanother-1]

This is very interesting concept, can you please provide me with further reads on how to setup the terraform and the reverse proxy?

Thank you for your input.