Know who is responsible for each layer
Your hosting provider controls its infrastructure; the business may still own the operating system, application and accounts. A managed hosting label does not define every responsibility. We map those boundaries before proposing Linux administration, container support or a migration. Provider charges and continuous staffed monitoring are separate from a scoped technical task.
Find the infrastructure layer that needs work
Linux, Docker, PHP, DNS and hosting providers control different parts of delivery. Identify the boundary and recovery route before changing several layers. A migration should solve an evidenced requirement.
- Record stack and provider ownership.
- Inspect symptoms and relevant logs.
- Agree change and recovery path.
- Retest application and jobs.
Linux, containers or PHP: where to start
Deliver changes, tests and remaining provider limits. Hosting charges, migrations and application redevelopment need separate scope. A backup or advertised provider uptime is not an executed business recovery test.
| Layer | Evidence | Route |
|---|---|---|
| Operating system | Access and exposed services | Linux VPS |
| Containers | Deployment/data map | Docker |
| Runtime | Errors and compatibility | PHP |
Example: diagnose the runtime before migrating hosting
The app fails after a runtime update while the host remains reachable. Runtime diagnosis avoids an unnecessary server replacement. This is an illustrative scenario, not a customer case or a promised result.