Explainer
Use a Helm release name in chart values and templates
Keep ordinary values as data, build names in templates, or explicitly evaluate a trusted template string with tpl.
Explainer
Choose Vagrant or Docker for a development environment
Compare application containers with virtual-machine workflows, accounting for providers, kernels, host platforms, and isolation requirements.
Explainer
Compare Docker Compose and Kubernetes
Choose an application deployment model based on failure domains, reconciliation, networking, and the operational capacity available.
Explainer
Understand links and depends_on in Docker Compose
Separate service-name resolution, network aliases, startup ordering, and readiness checks when modernizing a Compose configuration.
Explainer
Manage permissions on shared Docker volumes
Check numeric identities, mount settings, and namespace mappings before changing ownership, then establish a deliberate shared-write policy.
Explainer
Understand Dockerfile and Docker Compose responsibilities
Build an application image with a Dockerfile, then describe service configuration and dependencies with Compose.
Explainer
Distinguish exposed and published Docker ports
Use EXPOSE as image metadata and publish ports deliberately, without confusing either setting with an application listener or firewall.
Explainer
Understand Docker run, start, and health starting states
Separate container creation and process state from health-check status, and know what restarting an existing container preserves.
Explainer
Measure Docker runtime performance overhead
Evaluate CPU, storage, networking, and virtualization costs with a workload-specific comparison instead of relying on a universal percentage.
Explainer
Find where Docker stores images and container data
Inspect the active daemon and storage backend before locating data, reclaiming space, or planning a storage migration.
Technical guide
Recover a dropped Git stash
Locate surviving stash objects, inspect all stored content, protect the candidate, and restore it without assuming garbage collection has spared it.
Explainer
Remove www and redirect HTTP to HTTPS in Nginx
Route three noncanonical entry points directly to the HTTPS apex host, while preserving paths and validating certificates before redirects.