Configuring CRC

About CRC configuration

Use the crc config command to configure both the crc executable and the CRC instance. The crc config command requires a subcommand to act on the configuration. The available subcommands are get, set, unset, and view. The get, set, and unset subcommands operate on named configurable properties. Run the crc config --help command to list the available properties.

You can also use the crc config command to configure the behavior of the startup checks for the crc start and crc setup commands. By default, startup checks report an error and stop execution when their conditions are not met. Set the value of a property starting with skip-check to true to skip the check.

Viewing CRC configuration

The CRC executable provides commands to view configurable properties and the current CRC configuration.

Procedure

To view the available configurable properties:
```
$ crc config --help
```
To view the values for a configurable property:
```
$ crc config get <property>
```
To view the complete current configuration:
```
$ crc config view
```
The crc config view command does not return any information if the configuration consists of default values.

Changing the selected preset

You can change the container runtime used for the CRC instance by selecting the desired preset.

You can change the selected preset using the command line interface.

You cannot change the preset of an existing CRC instance. Preset changes are only applied when a CRC instance is created. To enable preset changes, you must delete the existing instance and start a new one.

Procedure

Change the selected preset from the command line:
```
$ crc config set preset <name>
```
Valid preset names are:

Table 1. Preset names

Name Preset

openshift

OpenShift Container Platform

okd

OKD

microshift

MicroShift

Table 1. Preset names
Name	Preset
`openshift`	OpenShift Container Platform
`okd`	OKD
`microshift`	MicroShift

Additional resources

For more information about the minimum system requirements for each preset, see Minimum system requirements.

Configuring the instance

Use the cpus and memory properties to configure the default number of vCPUs and amount of memory available to the CRC instance, respectively.

Alternatively, the number of vCPUs and amount of memory can be assigned using the --cpus and --memory flags to the crc start command, respectively.

You cannot change the configuration of a running CRC instance. To enable configuration changes, you must stop the running instance and start it again.

Procedure

To configure the number of vCPUs available to the instance:
```
$ crc config set cpus <number>
```
The default value for the cpus property is 4. The number of vCPUs to assign must be greater than or equal to the default.
To start the instance with the desired number of vCPUs:
```
$ crc start --cpus <number>
```
To configure the memory available to the instance:
```
$ crc config set memory <number-in-mib>
```
Values for available memory are set in mebibytes (MiB). One gibibyte (GiB) of memory is equal to 1024 MiB.

The default value for the memory property is 10752. The amount of memory to assign must be greater than or equal to the default.
To start the instance with the desired amount of memory:
```
$ crc start --memory <number-in-mib>
```