Docker Compose Environment Did Not Update

A Compose restart does not apply every change to container configuration. You may also be editing an environment file used for Compose interpolation rather than one injected into the service. Check those two boundaries before repeatedly restarting the application.

Identify where the variable belongs

Compose can use values to substitute into its configuration, and services can receive environment variables at runtime. Those are related but separate mechanisms.

Docker documents environment precedence. A value set elsewhere can override the file you edited. An upstream issue captures the common confusion between --env-file and service environment injection.

Write down the variable name and every place it is defined. Use a harmless value for the diagnostic if possible.

Compare desired and running configuration

Inspect the resolved Compose configuration locally. Be careful: configuration output can contain secrets. Do not paste it wholesale into a public issue.

Then check the specific non-secret value inside the running service. If the resolved value is correct but the container still has the old one, investigate container recreation. If the resolved value is already wrong, investigate precedence and file selection.

Resolved configuration	Running service	Diagnosis direction
Old value	Old value	Wrong source or override
New value	Old value	Container lifecycle
New value	New value	Application loading or caching
Missing	Missing	Variable never injected

Apply the change at the right layer

Docker's restart reference explains that configuration changes are not reflected by that command. Reconcile the service through the appropriate Compose update operation after reviewing the configuration and expected service interruption.

Do not delete volumes to update an environment variable. Persistent data and runtime configuration are different concerns.

If the application stores settings in its own database, an environment variable may only provide an initial default. Consult that application's configuration rules instead of assuming a container restart overrides saved settings.

Use a controlled marker

For example, change a non-sensitive display label from trial-a to trial-b. Confirm it in the resolved configuration, container environment and application output in that order.

This traces the full path without exposing a real token. Once the mechanism is understood, apply the intended setting through your normal secret-management process.

Confirm after recreation

Recreate only the intended service using its documented deployment procedure, then verify the effective value and one normal user task. Record the service name and configuration source so the next change is predictable.

This is particularly useful for local AI deployments, where model endpoints, context settings and storage paths can be configured in different processes.

Related troubleshooting

• Docker depends_on: Database Not Ready
• Docker Data Missing After a Project Rename

This guide draws on the linked documentation. Examples are illustrative unless explicitly identified as measured results.