I'm diving into Kubernetes and setting up a cluster in my homelab. Up until now, I've been deploying single-instance services like NextCloud and Plex as Deployments with a Replica count of 1. I just realized I don't fully understand if I should continue doing that or if I should deploy them as simple Pods. What's the best approach for services that will only ever run as a single instance? Is there a difference in how I should deploy them?
5 Answers
Your setup sounds interesting! Curious about how you're managing ingress in your homelab?
Always go with a Deployment! It allows for easier management, such as scaling down to zero for maintenance or rolling updates without losing your Pod configuration. If you use a Pod, once it's gone, you have to recreate it manually, which can be a hassle.
Good to know, thanks!
Using a Pod skips out on the benefits of Kubernetes. With a Deployment, Kubernetes handles the scheduling and ensures your Pod gets placed again if it goes down. Pods are better for testing and debugging, but for anything running continuously, stick with Deployments!
Good to know, thanks!
If you're only running a single pod, you might wonder why to even use Kubernetes. But it's all about the extra features—like rolling updates and better integrations—compared to something like Docker Compose. Having everything managed in Kubernetes keeps things consistent across your services!
That's a good point!
Deployments are the way to go for running stateless applications. They maintain desired replica counts automatically. If you need stateful apps, consider using a StatefulSet instead. Pods are limited and you might risk downtime with a direct Pod deployment.
I'm running a mix, actually! I've got:
- Cloudflare Zero-Trust > Traefik Ingress Controller > Containers
- Traefik Ingress > Containers
- MetalLB > Containers
- NodePorts > Containers
I haven’t consolidated everything yet since I keep having issues with local DNS.