Fredric News

Tag: Tutorial

  • MicroK8s Lightweight K8s: Cert Renewal

    💡 MicroK8s Lightweight K8s: Cert Renewal — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for MicroK8s Lightweight K8s: Cert Renewal. DIRs certs (cluster certificates) /var/snap/microk8s/current/certs/ config (kubeconfig, etc.) /var/snap/microk8s/current/credentials/ Features Apply after adding SAN to CA certificate bash Copy # 인증서 템플릿 오픈 후 도메인 또는 IP 추가 sudo vi /var/snap/microk8s/current/certs/csr.conf.template…

  • HashiCorp Vault Helm Setup & Secret Injector

    💡 HashiCorp Vault Helm Setup & Secret Injector — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for HashiCorp Vault Helm Setup & Secret Injector. Installation bash Copy helm repo add hashicorp https://helm.releases.hashicorp.com helm install -n vault hashicorp/vault Unseal bash Copy k exec -it -n vault vault-0 — vault operator init >>>…

  • Tailwind CSS Utility Classes Sheet

    💡 Tailwind CSS Utility Classes Sheet — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Tailwind CSS Utility Classes Sheet. Basic src/assets/tailwind.css css Copy @tailwind base; @tailwind components; @tailwind utilities; src/main.ts ts Copy import ‘./assets/tailwind.css’ Custom src/assets/tailwind.css css Copy @tailwind base; @tailwind components; @tailwind utilities; @layer components { .btn { @apply…

  • Open Policy Agent (OPA/Gatekeeper) K8s

    💡 Open Policy Agent (OPA/Gatekeeper) K8s — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Open Policy Agent (OPA/Gatekeeper) K8s. Language Rego Kubernetes Setup Installation Check Gatekeeper resource bash Copy export factor=gatekeeper kubectl get $(kubectl api-resources -o name | grep $factor | sed -z ‘s/[\n\r]/,/g’ | sed ‘s/.$//g’) -A

  • Terminal Text Effects (TTE): CLI Animation

    💡 Terminal Text Effects (TTE): CLI Animation — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Terminal Text Effects (TTE): CLI Animation. Installation bash Copy pip install terminaltexteffects Exec bash Copy cat $textfile | tte $theme themes txt Copy Available Effects beams Create beams which travel over the canvas illuminating the…

  • Prometheus ServiceMonitor (smon.yaml)

    💡 Prometheus ServiceMonitor (smon.yaml) — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Prometheus ServiceMonitor (smon.yaml). bash Copy apiVersion: monitoring.coreos.com/v1 kind: ServiceMonitor metadata: name: jaeger-operator namespace: istio-system labels: prometheus: kube-prometheus-stack-prometheus spec: endpoints: – honorLabels: false path: /metrics port: metrics namespaceSelector: matchNames: – istio-system selector: matchLabels: app.kubernetes.io/name: jaeger-operator Prometheus ← Monitor resource…

  • Single Page Applications (SPA): SSR vs CSR

    💡 Single Page Applications (SPA): SSR vs CSR — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Single Page Applications (SPA): SSR vs CSR. Virtual DOM References and Guidelines (NOTE) Virtual DOM is a virtual DOM structure implemented as a JavaScript object. It has a structure similar to the actual DOM…

  • Istio Service Mesh Installation & Ingress

    💡 Istio Service Mesh Installation & Ingress — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Istio Service Mesh Installation & Ingress.

  • nerdctl CLI Sheet: containerd & Namespaces

    💡 nerdctl CLI Sheet: containerd & Namespaces — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for nerdctl CLI Sheet: containerd & Namespaces. Same as docker Differences from docker bash Copy #로그인시 insecure-registry 사용 nerdctl login –insecure-registry=true $image_registry #push할 때 isecure-registry 사용 nerdctl push –insecure-registry=true $image_registry/$project/$image:$tag Feature If the following error occurs…

  • Linux Timezone & timedatectl NTP

    💡 Linux Timezone & timedatectl NTP — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Linux Timezone & timedatectl NTP. Check the current time (current time zone) bash Copy date >>> Wed Oct 21 05:03:15 UTC 2020 <<< Check current time zone bash Copy ls -al /etc/localtime >>> /etc/localtime -> /usr/share/zoneinfo/Etc/UTC…