#### Randomness

## Configuration Directory

USAGE:
  mc batch COMMAND [COMMAND FLAGS | -h] [ARGUMENTS...]

COMMANDS:
  generate  generate a new batch job definition
  start     start a new batch job
  list, ls  list all current batch jobs
  status    summarize job events on MinIO server in real-time
  describe  describe job definition for a job
```

### Generate a job yaml
```
mc batch generate alias/ replicate
```

### Start the batch job (returns back the JID)

	"Condition": {"IpAddress": {"aws:SourceIp": "203.0.113.0/24"}}
  }
}
```

- `aws:UserAgent` - This value is a string that contains information about the requester's client application. This string is generated by the client and can be unreliable. You can only use this context key from `mc` or other MinIO SDKs which standardize the User-Agent string.

is configured to expose metrics without authentication, you don't need to use `mc` to generate prometheus config. You can skip reading further and move to 3.2 section.

The Prometheus endpoint in MinIO requires authentication by default. Prometheus supports a bearer token approach to authenticate prometheus scrape requests, override the default Prometheus config with the one generated using mc. To generate a Prometheus config for an alias, use [mc](https://min.io/docs/minio/linux/reference...

With NetworkPolicy enabled, traffic will be limited to just port 9000.

For more precise policy, set `networkPolicy.allowExternal=true`. This will
only allow pods with the generated client label to connect to MinIO.
This label will be displayed in the output of a successful install.

### Existing secret

For testing purposes, here is [how to create self-signed certificates](https://github.com/minio/minio/tree/master/docs/tls#3-generate-self-signed-certificates).

## 2. Create Kubernetes secret

[Kubernetes secrets](https://kubernetes.io/docs/concepts/configuration/secret) are intended to hold sensitive information.

See the [Kubernetes documentation](https://min.io/docs/minio/kubernetes/upstream/index.html) for more information.

## MinIO Docker Tips

### MinIO Custom Access and Secret Keys

To override MinIO's auto-generated keys, you may pass secret and access keys explicitly as environment variables. MinIO server also allows regular strings as access and secret keys.

#### GNU/Linux and macOS (custom access and secret keys)

```sh
docker run \

automatically. Enabling and suspending versioning is done at the bucket level.

Only MinIO generates version IDs, and they can't be edited. Version IDs are simply of `DCE 1.1 v4 UUID 4` (random data based), UUIDs are 128 bit numbers which are intended to have a high likelihood of uniqueness over space and time and are computationally difficult to guess. They are globally unique identifiers which can be locally generated without contacting a global registration authority. UUIDs are intended as unique identifiers...

### **4.1 Spark Pi**

Test the Spark installation by running the following compute intensive example, which calculates pi by “throwing darts” at a circle. The program generates points in the unit square ((0,0) to (1,1)) and counts how many points fall within the unit circle within the square. The result approximates pi.

Follow these steps to run the Spark Pi example:

- Login as user **‘spark’**.