Fredric News

Tag: ServerManagement

  • Harvester HCI Bare-Metal Installation via ISO

    💡 Harvester HCI Bare-Metal Installation via ISO — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Harvester HCI Bare-Metal Installation via ISO. Installation Preparation Create Bootable USB Disk https://github.com/harvester/harvester/releases/latest bash Copy brew install balenaetcher –cask Booting Configuration disk, nic settings: Select physical equipment using only the arrow keys and tab, enter,…

  • Kubernetes Labels & Annotations

    💡 Kubernetes Labels & Annotations — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Kubernetes Labels & Annotations. Label namespace bash Copy #istio 카나리 배포 istio.io/rev=canary #istio 프록시 주입 허용 or 불허 istio-injection=enabled or disabled pod bash Copy #istio 카나리 배포 istio.io/rev=canary #istio 프록시 주입 허용 or 불허 sidecar.istio.io/inject=”true” or “false”…

  • yq CLI Sheet: YAML Parsing, Querying

    💡 yq CLI Sheet: YAML Parsing, Querying — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for yq CLI Sheet: YAML Parsing, Querying. Installation Debian yaml Copy apt install golang-go # yq4 정상설치 go install github.com/mikefarah/yq/v4@latest export PATH=”$PATH:~/go/bin” snapd bash Copy # snap버그있으니 쓰지마셈 snap install yq apt yaml Copy # 이상한버전…

  • JavaScript Core: Event Loop & Async

    💡 JavaScript Core: Event Loop & Async — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for JavaScript Core: Event Loop & Async. Grammar Type 1. Primitive Types A primitive type represents a single value, and is a data type in which the value itself is stored. Primitive types are immutable, and…

  • Kube-apiserver Hardening: RBAC & Admission

    💡 Kube-apiserver Hardening: RBAC & Admission — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Kube-apiserver Hardening: RBAC & Admission. Common Log analysis to resolve Manifests errors bash Copy # 컨테이너 재시작여부 확인 crictl ps # Manifest 문법오류 탐색 (컨테이너가 안뜨므로 치명적임) journalctl -u kubelet | grep manifest # 종료된 컨테이너…

  • Kubernetes ReadOnly ServiceAccount & Limited

    💡 Kubernetes ReadOnly ServiceAccount & Limited — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Kubernetes ReadOnly ServiceAccount & Limited. readonly SA, Secrets, Kubeconfig Create permission env bash Copy export prefix=read-only export ns=default Create SA, token, CRB bash Copy kubectl create serviceaccount ${prefix}-sa -n ${ns} kubectl apply -f – << EOF…

  • HTTP Authentication Methods: Basic, Bearer

    💡 HTTP Authentication Methods: Basic, Bearer — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for HTTP Authentication Methods: Basic, Bearer. AuthN and AuthZ AuthN(Authentication) Classification of factors Description example knowledge base What only you know Password, name, resident registration number, employee number, etc. Ownership basis Owned only for use Certificate, OTP,…

  • Vue 2 to Vue 3 Migration: Composition API

    💡 Vue 2 to Vue 3 Migration: Composition API — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Vue 2 to Vue 3 Migration: Composition API. References and Guidelines (NOTE) BookMarkshttps://dev.grapecity.co.kr/bbs/board.php?bo_table=Insight≀_id=73 https://vuejs.org/#breaking-changes https://ui.toast.com/weekly-pick/ko_20200804 https://webpack.kr/configuration/dev-server/#devserver https://kyounghwan01.github.io/blog/Vue/vue3/global-state/#%E1%84%86%E1%85%A9%E1%86%A8%E1%84%91%E1%85%AD https://v3-migration.vuejs.org/migration-build.html#installation https://www.vuemastery.com/blog/vue-3-migration-build/ https://github.com/logaretm/vee-validate/issues/3438 //vee-validate 3 to 4 migration is failed Vue2 cons: limited typescript support, performance…

  • Java Functional Interfaces & Lambda

    💡 Java Functional Interfaces & Lambda — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Java Functional Interfaces & Lambda. Overview A functional interface is an interface with one abstract method. Starting from Java8, interfaces can contain default methods with default implementations. Even if there are multiple default methods, if there…

  • Talos Linux: Immutable & Secure K8s Cluster

    💡 Talos Linux: Immutable & Secure K8s Cluster — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Talos Linux: Immutable & Secure K8s Cluster. Binary Installation mac bash Copy brew install siderolabs/tap/talosctl echo ‘source <(talosctl completion zsh)’ | tee -a ~/.zshrc #if using colima sudo ln -s “$HOME/.colima/default/docker.sock” /var/run/docker.sock #if using…