Deployment boundary

Move a Docker Compose project to a single VPS

A VPS move is a change in operating boundary, not merely a different docker compose up command.

Define the host boundary first

Record who can access the server, which ports reach the public internet, and where the deployment can be recovered if the host is unavailable. A public service usually needs one HTTPS entry point rather than a collection of exposed application and database ports.

Turn the region into an explicit decision: proximity to primary users and external dependencies, a required data jurisdiction, proximity to operators and the recovery path, or a flexible shortlist that will be measured. This prevents a low headline price in the wrong region from becoming the default candidate.

Build resource floors from known requirements

Keep application RAM, database or cache RAM, and host reserve separate, then add them into one comparable RAM floor. Set the vCPU floor from upstream requirements, an existing deployment, or a representative load test; user count and a label such as “bursty” do not determine CPU demand by themselves.

Forecast protected state over the planning horizon, apply the selected free-space reserve, and add a separate allowance for the operating system, image layers, logs, and temporary work. For public workloads, apply the chosen traffic reserve to estimated monthly egress so every plan is compared against the same transfer boundary.

Carry state separately from containers

Images can be recreated. Databases, uploaded files, repositories, certificates, and configuration need an explicit persistence and recovery map. Keep the map next to the deployment project before migration begins.

Make the first launch reversible

Render the final configuration, record the image versions, and keep a backup of current state before switching traffic. The first VPS launch should also prove DNS, HTTPS, restart behavior, and a representative restore.

Compare snapshot scope, independent backup access, public-address pricing, CPU throttling, storage I/O terms, transfer overage, rescue access, and resize downtime beside the advertised CPU, RAM, and disk. These terms decide whether a nominally matching plan can actually support the intended operating and recovery path.

Continue planning

Apply this rule to a deployment boundary.

Build the VPS comparison specificationCheck a Compose file

Configuration

Environment variables or Compose secrets?

Recovery

Provider snapshot or off-site backup?

Editorial record

Maintained by Make Your Own Tools to turn “Validate a deployment” into a defined host, state, exposure, and recovery boundary. The references below provide the technical context for this planning path. Its calculation rules and planning assumptions are documented in the methodology, and affected calculations pass regression checks before the review date advances.

Last reviewed
Evidence set
4 primary references
Calculation coverage
3 affected rules checked
Read methodology →View change history ↗
Planning scope
Single-host Docker Compose planning and the deployment boundary described by this guide.
Next check
Carry the boundary into the selected application’s current image, configuration, and release-specific documentation.
Docker Compose production guidanceProduction-specific Compose configuration, restarts, ports, logging, and deployment changes.Open source ↗Docker Compose volumes reference sourceMaintainer documentation source for service volume grants and a named-volume backup-access example.Open source ↗Docker resource constraintsOfficial CPU, memory, OOM, swap, and host-capacity boundaries used when turning measured workload requirements into a host specification.Open source ↗Docker port publishing and mappingOfficial public-port and localhost binding behavior for translating the planned exposure boundary into VPS network checks.Open source ↗