Read from and written to as if they were an actual physical disk or block Use of a ‘loopback’ mechanism that allows files on the local disk to be This configuration is only appropriate for testing. Use docker save to save containers,Īnd push existing images to Docker Hub or a private repository, so you doĬonfigure Docker with the devicemapper storage driverīefore following these procedures, you must first meet all the Changing the storage driver makes any containers you have alreadyĬreated inaccessible on the local system.devicemapper requires the lvm2 and device-mapper-persistent-data packages.devicemapper is supported on Docker Engine - Community running on CentOS, Fedora,.These devices can be extended byĪdding physical storage to your Docker host, and they perform better than usingĪ filesystem at the operating system (OS) level. The block level, rather than the file level. The devicemapper driver uses block devices dedicated to Docker and operates at However, specific configuration is required to use it with Storage driver as devicemapper, and the kernel framework as Device Mapper.įor the systems where it is supported, devicemapper support is included in Leverages the thin provisioning and snapshotting capabilities of this frameworkįor image and container management. Device Mapper is a kernel-based framework that underpins many advanced
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