Fredric News

Tag: DevOps

  • Keycloak Open Source IAM: OIDC & SSO

    💡 Keycloak Open Source IAM: OIDC & SSO — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Keycloak Open Source IAM: OIDC & SSO. mariaDB sql Copy — 유저생성 후 keycloak 데이터베이스에 대한 권한 부여 select host,user from mysql.user; create user ‘ckckdm’@’%’ identified by ‘Enterprise Cloud2018!’; grant all privileges on keycloak.*…

  • Linux SSH Session Idle Timeout & Automatic

    💡 Linux SSH Session Idle Timeout & Automatic — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Linux SSH Session Idle Timeout & Automatic. RHEL vi /etc/ssh/sshd_config bash Copy # 클라이언트로부터 데이터를 받지 못한 경우 sshd(8)가 클라이언트로부터 응답을 요청하기 위해 암호화된 채널을 통해 메시지를 보내는 시간 초과 간격을 초 단위로 설정합니다.…

  • 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…

  • Colima Container Runtime on macOS: Docker

    💡 Colima Container Runtime on macOS: Docker — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Colima Container Runtime on macOS: Docker. Exec bash Copy #템플릿 지정 colima template #기존 vm 삭제 (템플릿내 insecure변경 적용) colima delete #정지 colima stop #시작 colima start #vm 접근 colima ssh Features TLS Trust required:…

  • 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…

  • 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…

  • 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…

  • 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…