Fredric News

Tag: Tutorial

  • 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…

  • Kubernetes Multi-Cluster Access: kubeconfig

    💡 Kubernetes Multi-Cluster Access: kubeconfig — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Kubernetes Multi-Cluster Access: kubeconfig. Related documents Body 🔗 https://kubernetes.io/ko/docs/concepts/configuration/organize-cluster-access-kubeconfig/ bash Copy #[Target Cluster] ## ServiceAccount 생성 export KUBE_SA=jenkins export KUBE_NS=jenkins-Enterprise Cloud kubectl create sa -n ${KUBE_NS} ${KUBE_SA} ## SA ClusterRoleBinding 생성 – ## 인증토큰 얻기 kubectl get…

  • HAProxy Archi: L4/L7 Reverse Proxy & HA

    💡 HAProxy Archi: L4/L7 Reverse Proxy & HA — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for HAProxy Archi: L4/L7 Reverse Proxy & HA. Required registration elements portal frontend, backend → k8s ingress keycloak vault harbor Optional registration element mariaDB

  • Kubernetes kube-proxy Metric Binding

    💡 Kubernetes kube-proxy Metric Binding — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Kubernetes kube-proxy Metric Binding. Monitoring kube-proxy kube-proxy also provides a metrics endpoint called /metrics. However, because the default setting is 127.0.0.1:10249, it cannot be accessed from outside. So, if you try to collect it from prometheus, a…

  • OpenStack Volume Snapshots: Ceph RBD Image

    💡 OpenStack Volume Snapshots: Ceph RBD Image — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for OpenStack Volume Snapshots: Ceph RBD Image. References and Guidelines (NOTE) Possible improvement: Change to for statement for cases where there are more than 2 Child, Snap, and Watchers ceph-mon01:/root/deleteImage.sh V3 bash Copy #!/bin/bash # v3.0…

  • Chrome Extension (Manifest V3) Dev: Service

    💡 Chrome Extension (Manifest V3) Dev: Service — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Chrome Extension (Manifest V3) Dev: Service. Sample manifest.json json Copy { “manifest_version”: 3, “name”: “My First Extension”, “version”: “1.0”, “description”: “클릭하면 인사를 건네는 팝업 프로그램”, “action”: { “default_popup”: “popup.html” }, “permissions”: [“activeTab”] } popup.html html…

  • Kubernetes Helm 3 Package Manager Setup

    💡 Kubernetes Helm 3 Package Manager Setup — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Kubernetes Helm 3 Package Manager Setup. References and Guidelines (NOTE) Reference CLI DB: Glossary DB: included inthis: Install Helm Offline bash Copy wget https://get.helm.sh/helm-v3.8.2-linux-amd64.tar.gz # scp tar xvf helm-v3.8.2-linux-amd64.tar.gz cd linux-amd64 cp helm /usr/local/bin Official…

  • WireGuard wg CLI Sheet: Key Generation

    💡 WireGuard wg CLI Sheet: Key Generation — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for WireGuard wg CLI Sheet: Key Generation. Installation Mac OS bash Copy brew install wireguard-tools (VPN Client Tool) Exec help txt Copy Usage: wg <cmd> [<args>] Available subcommands: show: Shows the current configuration and device information…

  • OPNsense WireGuard Client Handshake & Routing

    💡 OPNsense WireGuard Client Handshake & Routing — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for OPNsense WireGuard Client Handshake & Routing. WireGaurd Client hardware dependent issue References and Guidelines (NOTE) All of the cases below are issues that occur due to the declaration of a split tunnel. Possible solution with…