Fredric News

Tag: Technology

  • Grafana Dashboards & Prometheus Data Source

    💡 Grafana Dashboards & Prometheus Data Source — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Grafana Dashboards & Prometheus Data Source. Alert Create Alert Rule graphql Copy # A : prometheus Query: 10분동안 restart된 횟수 sum by(container,namespace,pod) (changes(kube_pod_container_status_restarts_total[10m])) # B : Expression: Reduce A # C : Expression: Math $B…

  • OpenStack Nova & Neutron Network

    💡 OpenStack Nova & Neutron Network — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for OpenStack Nova & Neutron Network. Volume Sewing Machine Rationale k8s node notReady status: Check communication status between kubelet and vm Check vm console log openstack bash Copy #openstack ssh 접속 cat platfrom_openrc >>> export OS_USERNAME=admin export…

  • Nix Package Manager Sheet: Reproducible Dev

    💡 Nix Package Manager Sheet: Reproducible Dev — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Nix Package Manager Sheet: Reproducible Dev. References and Guidelines (NOTE) – In typical package management systems such as apt or Homebrew, only one version of a specific package name can be installed throughout the system.…

  • Linux resolv.conf DNS & systemd-resolved

    💡 Linux resolv.conf DNS & systemd-resolved — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Linux resolv.conf DNS & systemd-resolved. ubuntu defaults bash Copy nameserver 127.0.0.53 #로컬 DNS리졸버 사용 options edns0 trust-ad search . coredns defaults bash Copy search default.svc.cluster.local svc.cluster.local cluster.local nameserver 10.152.183.10 #coredns serviceIP options ndots:5 Manage only with…

  • Linkerd Ultralight Service Mesh: mTLS

    💡 Linkerd Ultralight Service Mesh: mTLS — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Linkerd Ultralight Service Mesh: mTLS. Proxy 주입 방법 Automatic Proxy Injection inject Adding your services to Linkerd Injection (regeneration) through automatic generation of yaml txt Copy kubectl get -n $namespace deploy -o yaml | linkerd inject…

  • openfortivpn CLI: Fortinet SSL-VPN Tunnel

    💡 openfortivpn CLI: Fortinet SSL-VPN Tunnel — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for openfortivpn CLI: Fortinet SSL-VPN Tunnel. 🔗 https://github.com/adrienverge/openfortivpn bash Copy # 패키지 설치 brew install openfortivpn # 계정정보를 이용하여 실행 sudo openfortivpn {{ 원격 게이트웨이 }}:{{ 포트 }} \ –username={{ 아이디 }} \ –password={{ 패스워드 }} #…

  • Kubelet Daemon Ops: Resource Reservation

    💡 Kubelet Daemon Ops: Resource Reservation — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Kubelet Daemon Ops: Resource Reservation. Configurations Apply max-pod-pids, podPidsLimit Simultaneous operation of 3 worker nodes Recommended method: Modify config.yaml (based on Kubeadm) /etc/kubernetes/kubelet-config.yaml (if not present, then) /var/lib/kubelet/config.yaml How to edit: 1. Make sure the file…

  • Ubuntu Package Lock (dpkg/apt lock) Release

    💡 Ubuntu Package Lock (dpkg/apt lock) Release — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Ubuntu Package Lock (dpkg/apt lock) Release. If ssh login is not possible as root vi /etc/ssh/sshd_config bash Copy … PermitRootLogin yes #if no … Or passwd may not be set. Internet connection problem References and…

  • 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…

  • 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…