Fredric News

Tag: Technology

  • 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…

  • Harvester HCI in HomeLab: KubeVirt VMs

    💡 Harvester HCI in HomeLab: KubeVirt VMs — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Harvester HCI in HomeLab: KubeVirt VMs. Installation HCI: Host References and Guidelines (NOTE) Hosts → \ → Click Edit Config Mount Disk and Join Longhorn Storage → Click Add Disk → Select Disk → Save…

  • Dockerfile : Multi-stage Builds & Caching

    💡 Dockerfile : Multi-stage Builds & Caching — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Dockerfile : Multi-stage Builds & Caching. Samples Syntax 1. Basic command FROM Create a new image based on the image. Format: FROM : Example: FROM node:16 RUN Specifies the command to be executed during Docker image…

  • istioctl CLI Sheet: Istio Proxy Diagnosis

    💡 istioctl CLI Sheet: Istio Proxy Diagnosis — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for istioctl CLI Sheet: Istio Proxy Diagnosis. Linked Page Cluster Control install Apply the Istio manifest to install or reconfigure Istio on your cluster. uninstall Remove Istio from the cluster upgrade Upgrade your Istio control plane…

  • CSS Selectors : Compound Selectors

    💡 CSS Selectors : Compound Selectors — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for CSS Selectors : Compound Selectors. About CSS selectors CSS (Cascading Style Sheets) is responsible for providing styles to HTML elements. To do so, you need to be familiar with selectors because you need to specify the…