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neon/docker-compose/README.md
John Spray c39d5b03e8 pageserver: remove legacy tenant config code, clean up redundant generation none/broken usages (#7947) 
## Problem

In https://github.com/neondatabase/neon/pull/5299, the new config-v1
tenant config file was added to hold the LocationConf type. We left the
old config file in place for forward compat, and because running without
generations (therefore without LocationConf) as still useful before the
storage controller was ready for prime-time.

Closes: https://github.com/neondatabase/neon/issues/5388

## Summary of changes

- Remove code for reading and writing the legacy config file
- Remove Generation::Broken: it was unused.
- Treat missing config file on disk as an error loading a tenant, rather
than defaulting it. We can now remove LocationConf::default, and thereby
guarantee that we never construct a tenant with a None generation.
- Update some comments + add some assertions to clarify that
Generation::None is only used in layer metadata, not in the state of a
running tenant.
- Update docker compose test to create tenants with a generation
2024-06-26 19:53:59 +00:00

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Example docker compose configuration

The configuration in this directory is used for testing Neon docker images: it is not intended for deploying a usable system. To run a development environment where you can experiment with a minature Neon system, use cargo neon rather than container images.

This configuration does not start the storage controller, because the controller needs a way to reconfigure running computes, and no such thing exists in this setup.