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This is to support deployments migrating from a multi-pooled
wider stripe to lower stripe. MINIO_STORAGE_CLASS_STANDARD
is still expected to be same for all pools. So you can satisfy
adding custom drive count based pools by adjusting the storage
class value.
```
version: v2
address: ':9000'
rootUser: 'minioadmin'
rootPassword: 'minioadmin'
console-address: ':9001'
pools: # Specify the nodes and drives with pools
-
args:
- 'node{11...14}.example.net/data{1...4}'
-
args:
- 'node{15...18}.example.net/data{1...4}'
-
args:
- 'node{19...22}.example.net/data{1...4}'
-
args:
- 'node{23...34}.example.net/data{1...10}'
set-drive-count: 6
```
91 lines
4.2 KiB
Markdown
91 lines
4.2 KiB
Markdown
## MinIO configuration YAML
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MinIO now supports starting the server arguments and configuration via a YAML configuration file. This YAML configuration describes everything that can be configured in a MinIO setup, such as '--address', '--console-address' and command line arguments for the MinIO server.
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Historically everything to MinIO was provided via command arguments for the hostnames and the drives via an ellipses syntax such as `minio server http://host{1...4}/disk{1...4}` this requirement added an additional burden to have sequential hostnames for us to make sure that we can provide horizontal distribution, however we have come across situations where sometimes this is not feasible and there are no easier alternatives without modifying /etc/hosts on the host system as root user. Many times in airgapped deployments this is not allowed or requires audits and approvals.
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MinIO server configuration file allows users to provide topology that allows for heterogeneous hostnames, allowing MinIO to deployed in pre-existing environments without any further OS level configurations.
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### Usage
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```
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minio server --config config.yaml
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```
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Lets you start MinIO server with all inputs to start MinIO server provided via this configuration file, once the configuration file is provided all other pre-existing values on disk for configuration are overridden by the new values set in this configuration file.
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Following is an example YAML configuration structure.
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```yaml
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version: v2
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address: ":9000"
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rootUser: "minioadmin"
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rootPassword: "minioadmin"
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console-address: ":9001"
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certs-dir: "/home/user/.minio/certs/"
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pools: # Specify the nodes and drives with pools
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- args:
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- "https://server-example-pool1:9000/mnt/disk{1...4}/"
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- "https://server{1...2}-pool1:9000/mnt/disk{1...4}/"
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- "https://server3-pool1:9000/mnt/disk{1...4}/"
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- "https://server4-pool1:9000/mnt/disk{1...4}/"
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- args:
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- "https://server-example-pool2:9000/mnt/disk{1...4}/"
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- "https://server{1...2}-pool2:9000/mnt/disk{1...4}/"
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- "https://server3-pool2:9000/mnt/disk{1...4}/"
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- "https://server4-pool2:9000/mnt/disk{1...4}/"
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# more args
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options:
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ftp: # settings for MinIO to act as an ftp server
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address: ":8021"
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passive-port-range: "30000-40000"
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sftp: # settings for MinIO to act as an sftp server
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address: ":8022"
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ssh-private-key: "/home/user/.ssh/id_rsa"
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```
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If you are using the config `v1` YAML you should migrate your `pools:` field values to the following format
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`v1` format
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```yaml
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pools: # Specify the nodes and drives with pools
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-
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- "https://server-example-pool1:9000/mnt/disk{1...4}/"
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- "https://server{1...2}-pool1:9000/mnt/disk{1...4}/"
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- "https://server3-pool1:9000/mnt/disk{1...4}/"
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- "https://server4-pool1:9000/mnt/disk{1...4}/"
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```
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to `v2` format
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```yaml
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pools:
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- args:
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- "https://server-example-pool1:9000/mnt/disk{1...4}/"
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- "https://server{1...2}-pool1:9000/mnt/disk{1...4}/"
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- "https://server3-pool1:9000/mnt/disk{1...4}/"
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- "https://server4-pool1:9000/mnt/disk{1...4}/"
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set-drive-count: 4 # Advanced option, must be used under guidance from MinIO team.
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```
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### Things to know
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- Fields such as `version` and `pools` are mandatory, however all other fields are optional.
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- Each pool expects a minimum of 2 nodes per pool, and unique non-repeating hosts for each argument.
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- Each pool expects each host in this pool has the same number of drives specified as any other host.
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- Mixing `local-path` and `distributed-path` is not allowed, doing so would cause MinIO to refuse starting the server.
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- Ellipses notation (e.g. `{1...10}`) or bracket notations are fully allowed (e.g. `{a,c,f}`) to have multiple entries in one line.
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> NOTE: MinIO environmental variables still take precedence over the `config.yaml` file, however `config.yaml` is preferred over MinIO internal config KV settings via `mc admin config set alias/ <sub-system>`.
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### TODO
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In subsequent releases we are planning to extend this to provide things like
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- Reload() of MinIO server arguments without fully restarting the process.
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- Expanding 1 node at a time by automating the process of creating a new pool
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and decommissioning to provide a functionality that smaller deployments
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care about.
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