lvmd is a gRPC service to manage LVM volumes. It is composed of two services:
- VGService
- Provide volume group information: list logical volume, list and watch free bytes
- LVService
- Provide management of logical volumes: create, remove, resize
lvmd is intended to be run as a systemd service on the node OS.
Command-line options are:
| Option | Type | Default value | Description |
|---|---|---|---|
volume-group |
string | "" | target volume group name |
listen |
string | /run/topolvm/lvmd.sock |
unix domain socket endpoint of gRPC |
spare |
uint64 | 10 | Storage capacity in GiB to be spared |
LVMd subtracts a certain amount from the free space of a volume group before reporting the free space of the volume group.
The default spare capacity is 10 GiB. This can be changed with --spare command-line flag.