mirror of https://github.com/docker/cli.git
66 lines
2.1 KiB
Markdown
66 lines
2.1 KiB
Markdown
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---
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title: "stack config"
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description: "The stack config command description and usage"
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keywords: "stack, config"
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---
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# stack config
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```markdown
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Usage: docker stack config [OPTIONS]
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Outputs the final config file, after doing merges and interpolations
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Options:
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-c, --compose-file strings Path to a Compose file, or "-" to read from stdin
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--orchestrator string Orchestrator to use (swarm|kubernetes|all)
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--skip-interpolation Skip interpolation and output only merged config
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```
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## Description
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Outputs the final Compose file, after doing the merges and interpolations of the input Compose files.
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## Examples
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The following command outputs the result of the merge and interpolation of two Compose files.
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```bash
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$ docker stack config --compose-file docker-compose.yml --compose-file docker-compose.prod.yml
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```
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The Compose file can also be provided as standard input with `--compose-file -`:
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```bash
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$ cat docker-compose.yml | docker stack config --compose-file -
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```
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### Skipping interpolation
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In some cases, it might be useful to skip interpolation of environment variables.
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For example, when you want to pipe the output of this command back to `stack deploy`.
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If you have a regex for a redirect route in an environment variable for your webserver you would use two `$` signs to prevent `stack deploy` from interpolating `${1}`.
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```bash
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service: webserver
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environment:
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REDIRECT_REGEX=http://host/redirect/$${1}
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```
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With interpolation, the `stack config` command will replace the environment variable in the Compose file
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with `REDIRECT_REGEX=http://host/redirect/${1}`, but then when piping it back to the `stack deploy`
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command it will be interpolated again and result in undefined behavior.
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That is why, when piping the output back to `stack deploy` one should always prefer the `--skip-interpolation` option.
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```
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$ docker stack config --compose-file web.yml --compose-file web.prod.yml --skip-interpolation | docker stack deploy --compose-file -
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```
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## Related commands
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* [stack deploy](stack_deploy.md)
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* [stack ps](stack_ps.md)
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* [stack rm](stack_rm.md)
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* [stack services](stack_services.md)
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