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Chapter 6. Disabling the LVMS CSI provider or CSI snapshot
You can configure MicroShift to disable the built-in logical volume manager storage (LVMS) Container Storage Interface (CSI) provider or the CSI snapshot capabilities to reduce the use of runtime resources such as RAM, CPU, and storage.
6.1. Disabling deployments that run CSI snapshot implementations
To prevent the installation of CSI implementation pods, disable the deployments that run CSI snapshot implementations. This configuration conserves system resources by ensuring that snapshot components are not deployed when they are not required.
Use the procedure if you are defining the configuration file before installing and running MicroShift. If MicroShift is already started, the CSI snapshot implementation will be running. You must manually remove the implementation by following the uninstallation instructions.
MicroShift does not delete CSI snapshot implementation pods. You must configure MicroShift to disable installation of the CSI snapshot implementation pods during the startup process.
Procedure
Disable installation of the CSI snapshot controller by entering the
optionalCsiComponentsvalue under thestoragesection of the MicroShift configuration file in/etc/microshift/config.yaml:# ... storage: {} # ...# ... storage: {} # ...Copy to Clipboard Copied! Toggle word wrap Toggle overflow where
storage: Specifies the storage details. You can choose to not defineoptionalCsiComponents. If you do specify theoptionalCsiComponentsfield, valid values include: an empty value ([]) or a single empty string element ([""]),snapshot-controller, ornone. A value ofnoneis mutually exclusive with all other values.NoteIf the
optionalCsiComponentsvalue is empty or null, MicroShift defaults to deployingsnapshot-controller.After the
optionalCsiComponentsfield is specified with a supported value in theconfig.yaml, start MicroShift by running the following command:sudo systemctl start microshift
$ sudo systemctl start microshiftCopy to Clipboard Copied! Toggle word wrap Toggle overflow NoteMicroShift does not redeploy the disabled components after a restart.
6.2. Disabling deployments that run the CSI driver implementations
You can disable installation of the CSI implementation pods. MicroShift does not delete CSI driver implementation pods. You must configure MicroShift to disable installation of the CSI driver implementation pods during the startup process.
This procedure is for defining the configuration file before installing and running MicroShift. If MicroShift is already started, then the CSI driver implementation is running. You must manually remove it by following the uninstallation instructions.
Procedure
Disable installation of the CSI driver by entering the
drivervalue under thestoragesection of the MicroShift configuration file in/etc/microshift/config.yaml:# ... storage driver: - "none" # ...
# ... storage driver: - "none" # ...Copy to Clipboard Copied! Toggle word wrap Toggle overflow where:
storage.driver.noneSpecifies the driver to disable. Valid values are
noneorlvms.NoteBy default, the
drivervalue is empty or null and LVMS is deployed.
Start MicroShift after the
driverfield is specified with a supported value in the/etc/microshift/config.yamlfile by running the following command:sudo systemctl enable --now microshift
$ sudo systemctl enable --now microshiftCopy to Clipboard Copied! Toggle word wrap Toggle overflow NoteMicroShift does not redeploy the disabled components after a restart operation.
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