Kubernetes on Umi4Life's Bloghttps://umi4.life/categories/kubernetes/Recent content from Umi4Life's BlogHugoen-uszekamashi@umi4.life (Umi4Life / Zekamashi)zekamashi@umi4.life (Umi4Life / Zekamashi)All articles on this blog are licensed under the BY-NC-SA license agreement unless otherwise stated. Please indicate the source when reprinting!Sat, 17 Oct 2026 09:40:00 +0700My dashboard invented 7,694 requests an hourhttps://umi4.life/posts/prometheus-fabricated-rates/Sat, 17 Oct 2026 09:40:00 +0700zekamashi@umi4.life (Umi4Life / Zekamashi)https://umi4.life/posts/prometheus-fabricated-rates/ My dashboard invented 7,694 requests an hour

Author: Umi4Life / Zekamashi(zekamashi@umi4.life)

Prometheus Grafana Loki Traefik Kubernetes

Background

My two arcade servers, Sumeragi and RCHE, run as four replicas each on a k3s cluster in my homelab DMZ LAN (read k3s series). Rche already had a full Grafana dashboard with every game and cabinet. Sumeragi had logs and nothing else so it is lacking grafana metrics unlike rche.

So I gave Sumeragi Grafana Alloy to send pod logs to Loki. Prometheus and Grafana run on a monitoring VM on my LAN, which can’t reach the DMZ, so Prometheus scrapes through a Traefik entrypoint on exgress, my edge VM, which only answers to the monitoring host.

Published on 2026-10-17 at Umi4Life's Blog, last modified on 2026-10-17

]]>homelabkubernetesprivate-serverMigrating my arcade server to k3s, Part 3https://umi4.life/posts/sumeragi-k3s-image-promotion/Sat, 17 Oct 2026 09:31:00 +0700zekamashi@umi4.life (Umi4Life / Zekamashi)https://umi4.life/posts/sumeragi-k3s-image-promotion/ Migrating my arcade server to k3s, Part 3

Author: Umi4Life / Zekamashi(zekamashi@umi4.life)

Argo CD Gitea Renovate Kubernetes

Background

By the end of Part 1, a deploy was a reviewed commit to acid, my GitOps repo, followed by a click on Sync in Argo. The commit was the annoying part. CI built an image, I copied its digest out of the log, opened acid, pasted it into a kustomization.yaml and opened a PR. Fine for one app, old fast with five:

sumeragi       arcade backend                        built in my Gitea CI
sumeragi-net   web companion, API + web images       built in my Gitea CI
rche           e-amusement server core               built in my Gitea CI
rche-plugins   rche's plugin artifact                built in my Gitea CI
reminiscence   arcade queue board, public on GitHub  released to GHCR

What I wanted:

Published on 2026-10-17 at Umi4Life's Blog, last modified on 2026-10-17

]]>homelabkubernetesprivate-serverMigrating my arcade server to k3s, Part 2https://umi4.life/posts/sumeragi-k3s-control-plane-ha/Sat, 17 Oct 2026 09:30:00 +0700zekamashi@umi4.life (Umi4Life / Zekamashi)https://umi4.life/posts/sumeragi-k3s-control-plane-ha/ Migrating my arcade server to k3s, Part 2

Author: Umi4Life / Zekamashi(zekamashi@umi4.life)

Kubernetes etcd Proxmox Terraform Ansible

Background

Part 1 ended on two Proxmox hosts and a single k3s server, and the top of my wishlist was a third worker and control-plane HA. Both were really waiting on hardware. Then I got more bare-metal machines, and the Proxmox cluster went from two hosts to six.

More hosts meant more places to put k3s VMs, so this part is the follow-up: more agents, more servers, and a test to see whether losing a server still matters.

Published on 2026-10-17 at Umi4Life's Blog, last modified on 2026-10-17

]]>homelabkubernetesprivate-serverMigrating my arcade server to k3s, Part 1https://umi4.life/posts/sumeragi-k3s-zero-downtime/Sat, 17 Oct 2026 04:30:00 +0700zekamashi@umi4.life (Umi4Life / Zekamashi)https://umi4.life/posts/sumeragi-k3s-zero-downtime/ Migrating my arcade server to k3s, Part 1

Author: Umi4Life / Zekamashi(zekamashi@umi4.life)

Kubernetes Argo CD Proxmox Gitea Traefik

Background

I run a private arcade server for ALL.Net games called Sumeragi. It’s a fork of ARTEMiS. For months it ran as a single Docker Compose service on my homelab, and every update meant restarting the one process every cabinet talks to. If someone finished a song while it was restarting, the score had nowhere to save. I wanted rollouts without that gap.

I’d already moved Rche to Docker Swarm, and Swarm would have been enough here too. I picked Kubernetes anyway, because I wanted to practice Kubernetes and distributed systems on something with real traffic. I went with k3s since it’s light and barebone, which is good for learning, and Argo CD for Git-declared state.

Published on 2026-10-17 at Umi4Life's Blog, last modified on 2026-10-17

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