Fredric News

Tag: OpenSource

  • Linux top Command Sheet: CPU & Memory

    💡 Linux top Command Sheet: CPU & Memory — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Linux top Command Sheet: CPU & Memory. bash Copy top CPU Usage us (user): Time used by processes running in user space. sy (system): Time used by processes running in kernel space. ni (nice):…

  • 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…

  • TACO 2.0 Infra: K8s, Ceph & OpenStack

    💡 TACO 2.0 Infra: K8s, Ceph & OpenStack — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for TACO 2.0 Infra: K8s, Ceph & OpenStack. This manual was written based on the EC2 environment created by AWS, and is an AIO (All-In-One) guide that installs Kubernetes, Ceph, and OpenStack all in one…

  • 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…

  • Rook-Ceph Distributed Storage Cluster Helm

    💡 Rook-Ceph Distributed Storage Cluster Helm — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Rook-Ceph Distributed Storage Cluster Helm. References and Guidelines (NOTE) Important note: You must customize the ‘CephCluster’ resource in the sample manifest for your cluster. Each CephCluster must be deployed in its own namespace, the sample uses…

  • 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…