Fredric News

Tag: Tutorial

  • Bash Script if Statements: Compare Operators

    💡 Bash Script if Statements: Compare Operators — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Bash Script if Statements: Compare Operators. if Expression Use Features POSIX Compatibility if ; then Branch based on command execution result Judging by the exit code after executing the command fully compatible if [ ];…

  • MySQL on macOS via Homebrew: Security

    💡 MySQL on macOS via Homebrew: Security — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for MySQL on macOS via Homebrew: Security. Docker-based local setting installation bash Copy brew install colima docker mysql-client exec bash Copy colima start docker run –name spring-mysql -p 3306:3306 -e MYSQL_ROOT_PASSWORD=root -e MYSQL_DATABASE=spring_db -d mysql:8.0 mysql…

  • Modern Languages Compare: Go, Rust, Java, and

    💡 Modern Languages Compare: Go, Rust, Java, and — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Modern Languages Compare: Go, Rust, Java, and. MSA Conformity Assessment Spring Boot VS Micronaut VS Quarkus VS Go (Golang) VS Node.js VS Kotlin with Ktor Evaluation items Spring Boot Micronaut Quarkus Go (Golang) Node.js…

  • Nginx Web Server Tuning: Reverse Proxy

    💡 Nginx Web Server Tuning: Reverse Proxy — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Nginx Web Server Tuning: Reverse Proxy. References and Guidelines (NOTE) If Nginx is accessed over HTTPS, but internally uses HTTP to communicate with backend services, this is a common configuration known as SSL termination or…

  • Keycloak Open Source IAM: OIDC & SSO

    💡 Keycloak Open Source IAM: OIDC & SSO — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Keycloak Open Source IAM: OIDC & SSO. mariaDB sql Copy — 유저생성 후 keycloak 데이터베이스에 대한 권한 부여 select host,user from mysql.user; create user ‘ckckdm’@’%’ identified by ‘Enterprise Cloud2018!’; grant all privileges on keycloak.*…

  • Spring Lombok Annotations: Production Usage

    💡 Spring Lombok Annotations: Production Usage — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Spring Lombok Annotations: Production Usage. Common Annotation If you add the @Data annotation to a class, you can use highly useful methods such as toString(). sql Copy @Data //아래의 모든 애노테이션을 포함하는 문법 // @Getter +…

  • Linux SSH Session Idle Timeout & Automatic

    💡 Linux SSH Session Idle Timeout & Automatic — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Linux SSH Session Idle Timeout & Automatic. RHEL vi /etc/ssh/sshd_config bash Copy # 클라이언트로부터 데이터를 받지 못한 경우 sshd(8)가 클라이언트로부터 응답을 요청하기 위해 암호화된 채널을 통해 메시지를 보내는 시간 초과 간격을 초 단위로 설정합니다.…

  • Grafana Dashboards & Prometheus Data Source

    💡 Grafana Dashboards & Prometheus Data Source — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Grafana Dashboards & Prometheus Data Source. Alert Create Alert Rule graphql Copy # A : prometheus Query: 10분동안 restart된 횟수 sum by(container,namespace,pod) (changes(kube_pod_container_status_restarts_total[10m])) # B : Expression: Reduce A # C : Expression: Math $B…

  • CKS Certified Kubernetes Security Specialist

    💡 CKS Certified Kubernetes Security Specialist — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for CKS Certified Kubernetes Security Specialist. 📑 Table of Contents Skills Map by CKS problem solving scope CKS Troubleshooting Flow CKS 시험은 문제에서 구체적으로 어떤 기술(AppArmor, Seccomp, RBAC 등)을 사용해야 하는지 명시하지 않고, 추상적인 보안 요구사항(예: “컨테이너의…

  • OpenStack Nova & Neutron Network

    💡 OpenStack Nova & Neutron Network — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for OpenStack Nova & Neutron Network. Volume Sewing Machine Rationale k8s node notReady status: Check communication status between kubelet and vm Check vm console log openstack bash Copy #openstack ssh 접속 cat platfrom_openrc >>> export OS_USERNAME=admin export…