## Upgrading from mattermost-docker

```
$ export PATH_TO_MATTERMOST_DOCKER=path/to/mattermost-docker
$ ./scripts/upgrade-from-mattermost-docker.sh
```

Environment variables for upgrading:
`ttf` means, the script 'tries to find' the environment variables. 

| Name | Description | Type | Default | Required |
|------|-------------|------|:---------:|:--------:|
| PATH_TO_MATTERMOST_DOCKER | absolute path to your mattermost-docker folder | `string` | n/a | yes |
| POSTGRES_USER | postgres user to connect to the mattermost database | `string` | ttf | yes |
| POSTGRES_PASSWORD | postgres password for the POSTGRES_USER to connect to the mattermost database | `string` | ttf | yes |
| POSTGRES_DB | postgres database name for the mattermost database | `string` | ttf | yes |
| POSTGRES_OLD_VERSION | postgres database old version which should be upgraded from | `semver` | ttf | yes |
| POSTGRES_NEW_VERSION | postgres database new version which should be upgraded to | `semver` | 13 | yes |
| POSTGRES_DOCKER_TAG | postgres docker tag found [here](https://hub.docker.com/_/postgres) including python3-dev | `string` | 13.2-alpine | yes |
| POSTGRES_OLD_DOCKER_FROM | FROM declaration in the postgres Dockerfile to be replaced | `string` | ttf | yes |
| POSTGRES_NEW_DOCKER_FROM | FROM declaration in the postgres Dockerfile replacing POSTGRES_OLD_DOCKER_FROM | `string` | ttf | yes |
| POSTGRES_UPGRADE_LINE | folder name required to upgrade postgres (Needs to match a folder [here](https://github.com/tianon/docker-postgres-upgrade)) | `string` | ttf | yes |
| MM_OLD_VERSION | mattermost old version which should be upgraded from | `semver` | ttf | yes |
| MM_NEW_VERSION | mattermost new version which should be upgraded to | `semver` | 5.32.1 | yes |

You can overwrite any of these variables before running this script with:
```
$ export VAR_NAME_FROM_ABOVE=yourValue
$ export PATH_TO_MATTERMOST_DOCKER=path/to/mattermost-docker
$ ./scripts/upgrade-from-mattermost-docker.sh
```