frostfs-node/config/example/README.md
Denis Kirillov 87e69b9349 [#44] node: Support multiple configs
Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>
2023-02-21 10:00:28 +03:00

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# Examples of correct configuration file structures
Here are files in all supported formats and with all possible configuration values
of FrostFS applications. See [node.yaml](node.yaml) for configuration notes.
All parameters are correct, however, they are for informational purposes only.
It is not recommended transferring these configs for real application launches.
## Config files
- Storage node
- JSON: `node.json`
- YAML: `node.yaml`
- Inner ring
- YAML: `ir.yaml`
- CLI
- YAML: `cli.yaml`
### Multiple configs
You can split your configuration to several files.
For example, you can use separate yaml file for each shard or each service (pprof, prometheus).
You must use `--config-dir` flag to process several configs:
```shell
$ ./bin/frotsfs-node --config ./config/example/node.yaml --config-dir ./dir/with/additional/configs
```
When the `--config-dir` flag set, the application:
* reads all `*.y[a]ml` files from provided directory,
* use Viper's [MergeConfig](https://pkg.go.dev/github.com/spf13/viper#MergeConfig) functionality to produce the final configuration,
* files are being processing in alphanumerical order so that `01.yaml` may be extended with contents of `02.yaml`.
So if we have the following files:
```yaml
# 00.yaml
logger:
level: debug
pprof:
enabled: true
address: localhost:6060
prometheus:
enabled: true
address: localhost:9090
```
```yaml
# dir/01.yaml
logger:
level: info
pprof:
enabled: false
```
```yaml
# dir/02.yaml
logger:
level: warn
prometheus:
address: localhost:9091
```
and provide the following flags:
```shell
$ ./bin/frotsfs-node --config 00.yaml --config-dir dir
```
result config will be:
```yaml
logger:
level: warn
pprof:
enabled: false
address: localhost:6060
prometheus:
enabled: true
address: localhost:9091
```
## Environment variables
- Storage node: `node.env`
- Inner ring: `ir.env`