Fredric News

Tag: Engineering

  • Adding Private Root CA Certificates to Linux

    💡 Adding Private Root CA Certificates to Linux — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Adding Private Root CA Certificates to Linux. Linux There are many ways to trust certificates on a Linux system, and may vary depending on the distribution you are using and your circumstances. Typically, you…

  • OpenStack Cloud Archi: Keystone, Nova

    💡 OpenStack Cloud Archi: Keystone, Nova — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for OpenStack Cloud Archi: Keystone, Nova. Frontend Common Tools SSR Extends nuxt State Management pinia vuex SSR Extends Next State Management zustand redux Backend express quarkus micronaut @doc/lang/golang no Framework Python fastapi Rust Full-stack svelte Features 🚀…

  • Java Collections Framework: List, Set, Map

    💡 Java Collections Framework: List, Set, Map — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Java Collections Framework: List, Set, Map. Subpage Spring Roadmap Java Collection Map Object → Map (Jackson.ObjectMapper) java Copy ObjectMapper objectMapper = new ObjectMapper(); Person person = new Person(12, “kim”); Map<String, Object> map = objectMapper.convertValue(person, Map.class);…

  • Obsidian Knowledge Base: Markdown Links

    💡 Obsidian Knowledge Base: Markdown Links — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Obsidian Knowledge Base: Markdown Links. Obsidian – Github integration Github Create authentication token (classic) Create Private Repository Mac Terminal – Sync Repository or Clone bash Copy export repoURL=https://github.com/myeong-han/obsidian-repository.git export repoName=obsidian-repository mkdir $repoName cd $repoName echo “#…

  • Kubernetes etcd Distributed Key-Value Store

    💡 Kubernetes etcd Distributed Key-Value Store — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Kubernetes etcd Distributed Key-Value Store. References and Guidelines (NOTE) When etcd (3 node) clustering, the argument to etcd1 is –initial-cluster=etcd1. etcd2 with –initial-cluster=etcd1,etcd2. If etcd3 is configured with –initial-cluster=etcd1,etcd2,etcd3, can it be considered normally clustered? 💡…

  • Advanced TypeScript Types: Generics, Unions

    💡 Advanced TypeScript Types: Generics, Unions — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Advanced TypeScript Types: Generics, Unions. Utility Type TypeScript’s **Utility Types** are powerful tools that help you transform already defined types or easily create new types. Frequently used utility types include Partial, Readonly, Pick, and Omit. Below…

  • Network Subnet Masking & CIDR Notation

    💡 Network Subnet Masking & CIDR Notation — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Network Subnet Masking & CIDR Notation. References and Guidelines (NOTE) CIDR (Classless Inter-Domain Routing) and subnet mask are similar concepts, but they are not exactly the same thing. Subnet Mask is a 32-bit (IPv4) or…

  • Harbor Container Registry T-Shoot & Recovery

    💡 Harbor Container Registry T-Shoot & Recovery — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Harbor Container Registry T-Shoot & Recovery. When: docker push Issue: unknown blob () bash Copy docker push my-harbor/base/ubuntu:latest >>> The push refers to repository [my-harbor/base/ubuntu] a46a5fb872b5: Pushing [==================================================>] 80.62MB unknown blob Given Use Bitnami Helmchart…

  • HashiCorp Vault Security: Transit Engine

    💡 HashiCorp Vault Security: Transit Engine — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for HashiCorp Vault Security: Transit Engine. Installation Operation Authentication Management Policy registration bash Copy k exec -it -n portal-system sts/vault — sh ### START IN CONTAINER vault login policy_name=admin-policy cat > /tmp/${policy_name}.hcl <<EOF path “*” { capabilities…

  • Linux Filesystem Mgmt: df, du & mount Sheet

    💡 Linux Filesystem Mgmt: df, du & mount Sheet — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Linux Filesystem Mgmt: df, du & mount Sheet. Links print commons lvm