# Opengist Helm Chart

![Version: 0.1.0](https://img.shields.io/badge/Version-0.1.0-informational?style=flat-square) ![AppVersion: 1.10.0](https://img.shields.io/badge/AppVersion-1.10.0-informational?style=flat-square)

Opengist Helm chart for Kubernetes.

* [Install](#install)
* [Configuration](#configuration)
* [Dependencies](#dependencies)
  * [Meilisearch Indexer](#meilisearch-indexer)
  * [PostgreSQL Database](#postgresql-database)

## Install

```bash
helm repo add opengist https://helm.opengist.io
 
helm install opengist opengist/opengist
```

## Configuration

This part explains how to configure the Opengist instance using the Helm chart. The `config.yml` file used by Opengist
is mounted from a Kubernetes Secret with a key `config.yml` and the values formatted as YAML.

### Using values

Using Helm values, you can define the values from a key name `config`

```yaml
config:
  log-level: "warn"
  log-output: "stdout"
```

This will create a Kubernetes secret named `opengist` mounted to the pod as a file with the YAML content of the secret,
used by Opengist.

### Using an existing secret

If you wish to not store sensitive data in your Helm values, you can create a Kubernetes secret with a key `config.yml`
and values formatted as YAML. You can then reference this secret in the Helm chart with the `configExistingSecret` key.

If defined, this existing secret will be used instead of creating a new one.

```yaml
configExistingSecret: <name of the secret>
```

## Dependencies

### Meilisearch Indexer

By default, Opengist uses the `bleve` indexer. **It is NOT available** if there is multiple replicas of the opengist pod (only one pod can open the index at the same time).

Instead, for multiple replicas setups, you **MUST** use the `meilisearch` indexer.

By setting `meilisearch.enabled: true`, the [Meilisearch chart](https://github.com/meilisearch/meilisearch-kubernetes) will be deployed aswell. 
You must define the `meilisearch.host` (Kubernetes Service) and `meilisearch.key` (value created by Meilisearch) values to connect to the Meilisearch instance in your Opengist config :

```yaml
index: meilisearch
index.meili.host: http://opengist-meilisearch:7700 # pointing to the K8S Service
index.meili.api-key: MASTER_KEY                    # generated by Meilisearch
```

If you want to use the `bleve` indexer, you need to set the `replicas` to `1`.

### PostgreSQL Database

By default, Opengist uses the `sqlite` database. If needed, this chart also deploys a PostgreSQL instance.

By setting `postgresql.enabled: true`, the [Bitnami PostgreSQL chart](https://github.com/bitnami/charts/tree/main/bitnami/postgresql) will be deployed aswell.
You must define the `postgresql.host`, `postgresql.port`, `postgresql.database`, `postgresql.username` and `postgresql.password` values to connect to the PostgreSQL instance.

Then define the connection string in your Opengist config:

```yaml
db-uri: postgres://user:password@opengist-postgresql:5432/opengist
```
Note: `opengist-postgresql` is the name of the K8S Service deployed by this chart.