Update README

Signed-off-by: Maksym Pavlenko <makpav@amazon.com>
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Maksym Pavlenko 2019-02-22 11:10:51 -08:00
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@ -24,10 +24,6 @@ The following configuration flags are supported:
default location for `containerd` plugins will be used)
* `pool_name` - a name to use for the devicemapper thin pool. Pool name
should be the same as in `/dev/mapper/` directory
* `data_device` - path to the data volume that should be used by the thin pool
* `meta_device` - path to the metadata volume that should be used by the thin-pool
* `data_block_size` - the size of allocation chunks in data file, between 128
sectors (64KB) and and 2097152 sectors (1GB) and a multiple of 128 sectors (64KB)
* `base_image_size` - defines how much space to allocate when creating the base device
Pool name and base image size are required snapshotter parameters.
@ -42,5 +38,5 @@ ctr run --snapshotter devmapper docker.io/library/hello-world:latest test
## Requirements
The devicemapper snapshotter requires `dmsetup` command line tool to be installed and available on your computer.
On Ubuntu, it can be installed with `apt-get install dmsetup` command.
The devicemapper snapshotter requires `dmsetup` (>= 1.02.110) command line tool to be installed and
available on your computer. On Ubuntu, it can be installed with `apt-get install dmsetup` command.