Posts tagged: kubernetes

I’m trying to learn proper logs, monitoring, otel, and grafana. Today I imported a bunch of pre-made k8s dashboards and made a few of my own for specific apps, and it made me want to know how I can turn my own custom dashboards into infrastructure as code. Turns out grafana makes it pretty easy to do this, if you have the grafana dashboard sidecar running. It will pick up any ConfigMap with the grafana_dashboard label and import it. Go to Dashboards -> Pick a Dashboard -> Export -> JSON. [1] [2] [3] apiVersion: v1 kind: ConfigMap metadata: name: my-dashboard namespace: meta labels: grafana_dashboard: "1" data: my-dashboard.json: | { "annotations": { "list": [ ... "uid": "fel2uhjhepg5ce", "version": 3 } References: [1]: https://dropper.waylonwalker.com/api/file/530e8515-a72a-4341-82d7-37f6f985e327.webp [2]: https://dropper.waylonwalker.com/api/file/d792b2db-2dcf-465f-a400-e84f199ec22d.webp [3]: https://dropper.waylonwalker.com/api/file/684701cc-efec-4e2b-9630-c8aea7ff5b14.webp

Diun Receive notifications when a Docker image is updated on a Docker registry crazymax.dev [1] Diun, looks like a very interesting tool to monitor for image updates, it does not make any change, it only makes notifications. This feels like an easy start to getting image updates started with low effort, keep git [2] ops, but requires manual updates. I see this as a tool that would be a great start and pair well with automated image updaters to ensure they are working as expected. Note This post is a thought [3]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://crazymax.dev/diun/ [2]: /glossary/git/ [3]: /thoughts/

Keel Kubernetes Operator to automate Helm, DaemonSet, StatefulSet & Deployment updates keel.sh [1] Keel looks interesting, I might give it a try as a simple image updater. I’m unsure if it fits my gitops patterns though. I like to keep everything defined in git [2], I don’t like drift outside of that so Keel might not be the thing I want. Note This post is a thought [3]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://keel.sh/ [2]: /glossary/git/ [3]: /thoughts/

AI workloads on Talos Linux Companies are exploring how to run GPU accelerated workloads on Kubernetes. Sidero Labs · siderolabs.com [1] cool article for setting up talos linux with an nvidia gpu. What a wild world it we are living in where these devices that started out being only for hardcore gamers are becoming commonplace in servers and slowly entering the homelab [2] space. Note This post is a thought [3]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://www.siderolabs.com/blog/ai-workloads-on-talos-linux/ [2]: /homelab/ [3]: /thoughts/

- Kelsey says several times in this interview, you don’t need kubernetes. If you are running one node you don’t need kubernetes. My question though is, would you use kubernetes? Ya I get it if you are a web developer, data scientist, backend dev, but if you are looking to bee a whole ass engineer, or infrastructure engineer, you know kubernetes, Should you use kubernetes on single node? Note This post is a thought [1]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: /thoughts/

poolers.postgresql.cnpg.io CRD metadata.annotations Too long · Issue #325 · cloudnative-pg/charts Unable to deploy helm chart using ArgoCD. Getting following error Failed sync attempt to : one or more objects failed to apply, reason: CustomResourceDefinition.apiextensions.k8s.io "poolers.postgr... GitHub · github.com [1] I’ve never seen or needed to use a serversideapply in kubernetes before, but I ran into this same issue in my k3s homelab [2] while installing cloudnative-pg. You can do it with argo apiVersion: argoproj.io/v1alpha1 kind: Application spec: syncPolicy: syncOptions: - ServerSideApply=true and you can do it with kubectl kubectl apply --server-side --force-conflicts -f cnpg-1.25.0.yaml Note This post is a thought [3]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://github.com/cloudnative-pg/charts/issues/325 [2]: /homelab/ [3]: /thoughts/

Keycloak Keycloak - the open source identity and access management solution. Add single-sign-on and authentication to applications and secure services with minimum effort. Keycloak · keycloak.org [1] Keycloak looks like an interesting way to setup sso. It’s part of the cncf so it’s got a good backing. I want something better for argo workflows and this might be it. I’m curious what else I can tie into it. Note This post is a thought [2]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://www.keycloak.org/ [2]: /thoughts/

GitHub - ngalaiko/tree-sitter-go-template: Golang template grammar for tree-sitter Golang template grammar for tree-sitter. Contribute to ngalaiko/tree-sitter-go-template development by creating an account on GitHub. GitHub · github.com [1] This setup fixed my nvim syntax highlighting in helm templates. Note This post is a thought [2]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://github.com/ngalaiko/tree-sitter-go-template [2]: /thoughts/

External Link X (formerly Twitter) · x.com [1] switching cloud providers, theres no easy way. K8s was supposed to get us there, haha, the deep integrations with each vendor just keep locking us in Note This post is a thought [2]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://x.com/changelog/status/1860697708463378497 [2]: /thoughts/

- This is a really amazing documentary of argocd. I got into k8s pretty late in the game. Which is pretty typical for me. As I went to use k8s for the first time i was using workflows, then cd. both of these tools had a level of polish that made them seem like they had been there forever and not quite as young as they actually are. I thought it was interesting how they focused on how the name must be two syllables or less, start with a or b, logo needs to be cutesy funny and recognizable seemed interesting, but puts them at the top of lists and makes them look like they’ve been there forever. Note This post is a thought [1]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: /thoughts/

Provider List - The Cluster API Book cluster-api.sigs.k8s.io [1] Cluster API book Note This post is a thought [2]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://cluster-api.sigs.k8s.io/reference/providers [2]: /thoughts/

After first setting up a new k3s instance your kubeconfig file will be located in /etc/rancher/k3s/k3s.yaml. You cans use it from here by setting $KUBECONFIG to that file. export KUBECONFIG=/etc/rancher/k3s/k3s.yaml Or you can copy it to ~/.kube/config cp /etc/rancher/k3s/k3s.yaml ~/.kube/config If you have installed k3s on a remote server and need the config on your local machine then you will need to modify the server address to reflect the remote server. scp user@<server-ip>:/etc/rancher/k3s/k3s.yaml ~/.kube/config Warning only do this if you don’t already have a ~/.kube/config file, otherwise copy it to a new file and set your $KUBECONFIG env variable to use it. Now you will need to open that file and change the server address, making sure to keep the port number. apiVersion: v1 clusters: - cluster: certificate-authority-data: **** server: https://<server-ip>:6443 name: default

I’ve started leaning in on kubernetes kustomize to customize my manifests per deployment per environment. Today I learned that it comes with a diff command. kubectl diff -k k8s/overlays/local You can enable color diffs by using an external diff provider like colordiff. export KUBECTL_EXTERNAL_DIFF="colordiff -N -u" You might need to install colordiff if you don’t already have it. sudo pacman -S colordiff sudo apt install colordiff Now I can try out kustomize changes and see the change with kustomize diff.

- Great intro into kustomize. This helped me get started with kustomize. Note This post is a thought [1]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: /thoughts/

Yesterday I realized that I have overlooked the default installation method of the sealed secrets controller for kubernetes kubeseal [1] this whole time an jumped straight to the helm section. I spun up a quick kind cluster [2] and had it up quickly. I can’t say this is any better or worse than helm as I have never needed to customize the install. According to the docs you can customize it with [[ kustomize ]] or helm. # option if you don't have a cluster try with kind kind create cluster curl -L https://github.com/bitnami-labs/sealed-secrets/releases/download/v0.27.0/controller.yaml > controller.yaml kubectl apply -f controller.yaml References: [1]: /kubernetes-kubeseal/ [2]: /kind-cluster/

Where DOESN’T curl run with curl BDFL Daniel Stenberg (Changelog & Friends #49) Daniel Stenberg shares his guiding principles for BDFL'ing curl, gives us his perspective on the state of the internet, talks financial independence, ensuring curl won't be the next XZ & more! Changelog · changelog.com [1] Love how Daniel just brushed off the number of netflix tv installs as small beans for curl installs. overall great episode on open source, owning a major component to technology with such a small team. Note This post is a thought [2]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://changelog.com/friends/49 [2]: /thoughts/