**NOTE:** If you are not installing Sentry from scratch, visit [On-Premise Stable for Sentry 9.1.2](https://github.com/getsentry/onpremise/tree/stable) as this version is not fully backward compatible.
There may need to be modifications to the included example config files (`sentry/config.example.yml` and `sentry/sentry.conf.example.py`) to accommodate your needs or your environment (such as adding GitHub credentials). If you want to perform these, do them before you run the install script and copy them without the `.example` extensions in the name (such as `sentry/sentry.conf.py`) before running the `install.sh` script.
Sentry comes with a cleanup cron job that prunes events older than `90 days` by default. If you want to change that, you can change the `SENTRY_EVENT_RETENTION_DAYS` environment variable in `.env` or simply override it in your environment. If you do not want the cleanup cron, you can remove the `sentry-cleanup` service from the `docker-compose.yml`file.
Updating Sentry using Compose is relatively simple. Just use the following steps to update. Make sure that you have the latest version set in your Dockerfile. Or use the latest version of this repository.
