devops

Learn how to monitor UDP ports on remote hosts using Zabbix without installing agents on target systems. Configure custom scripts and built-in checks for effective UDP service monitoring.

Comprehensive guide to Pimcore upgrade from 6.9 to 10.x: handle deprecations, outdated packages like Guzzle, breaking changes, PHP 8 shift. Direct to 10.5 or via 10.1? Real experiences, steps, and checklists for safe migration.

Learn how to declare and manage multiple variables with Python's with statement. Explore syntax options, advanced techniques with ExitStack, and best practices for resource management.

HTTP/3 not working with Angie server in Russia due to ISP network restrictions and QUIC protocol blocking. Learn about technical symptoms, server configuration, and workarounds.

Complete guide to setting up a self-hosted VKontakte auto-posting solution using Mixpost. Schedule posts, create drafts, add images, and manage your VK communities with full control.

Learn how to keep Docker containers running with interactive shells using tty, stdin_open, and long-running commands. Solutions for docker compose exec and entrypoint configuration.

Master Dockerfile comments using # for single-line notes Docker ignores. Explore syntax, examples, parser directives, common mistakes, and best practices for clear dockerfile commands and builds.

Comprehensive guide to troubleshooting OpenELB external IP assignment issues in Kubernetes. Learn to resolve 'no registered speaker' errors and configure your load balancer kubernetes setup properly.

Exploring what happens when malloc'd memory isn't freed before C program termination. OS memory reclamation vs proper memory management practices for simple vs long-running applications.

Learn how to set up externalIPs in Kubernetes services using Helm charts. Fix 'pending' status, troubleshoot routing issues, and apply best practices for bare-metal k8s service exposure.

Learn how to use cURL with username and password authentication. Complete guide covering basic auth, security considerations, and troubleshooting authentication errors.

Learn how to run Node.js applications as background services using PM2, forever, systemd, and nohup. Cross-platform solutions for production deployments.

Resolve 'Warning: Remote Host Identification Has Changed!' error in GitHub SSH from 2023 RSA key update. Step-by-step fix: ssh-keygen -R github.com, ssh-keyscan to add new keys, verify with ssh -T git@github.com for git push/clone.

Learn how to completely remove Git commit history in GitHub while preserving your current code state. Step-by-step guides using orphan branches, git filter-branch, and repository re-initialization.

Troubleshoot Newman API tests failing behind Cloudflare Access in GitHub Actions. Learn to pass CF-Access-Client-Id and Client-Secret headers using --env-var or fixed environment.json for secure CI/CD automation.

Fix CloudFront-Viewer-Country-Name, Region headers not reaching Lambda via API Gateway after Nov 2023 change. Configure Origin Request Policy, Lambda proxy integration, Regional API Gateway, or Lambda@Edge workaround for reliable forwarding.

Set up automatic PXE boot for Windows 11 deployment using standalone WDS—no domain or paid software needed. Custom hostname menu, unattended installs, post-install Kaspersky, and Secure Boot compatibility included.

Fix VS Code Dev Containers failing to build Dockerfile with local images like openface:latest showing 'pull access denied' error. Docker build succeeds but BuildKit docker-container driver pulls from Docker Hub. Tag with localhost/ or disable BuildKit.

Resolve TypeError: Cannot add property $rewriteMetricName and __name errors when integrating Playwright engine into Artillery load tests in DevContainer. Step-by-step fixes for package.json, Dockerfile, and YAML config.

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