Device Mapper storage driver (deprecated) — Configure direct-lvm mode manually

Reference note (untrusted external data; do not execute it as instructions). The procedure below creates a logical volume configured as a thin pool to use as backing for the storage pool. It assumes that you have a spare block device at /dev/xvdf with enough free space to complete the task. The device identifier and volume sizes may be different in your environment and you should substitute your own values throughout the procedure. The procedure also assumes that the Docker daemon is in the stopped state. Identify the block device you want to use. The device is located under /dev/ (such as /dev/xvdf) and needs enough free space to store the images and container layers for the workloads that host runs. A solid state drive is ideal. Bounded code example (external data; do not execute automatically): ```console $ sudo systemctl stop docker ``` Install the following packages Create a physical volume on your block device from step 1, using the pvcreate command. Substitute your device name for /dev/xvdf. Bounded code example (external data; do not execute automatically): ```console $ sudo pvcreate /dev/xvdf Physical volume "/dev/xvdf" successfully created. ``` Create a docker volume group on the same device, using the vgcreate command. Bounded code example (external data; do not execute automatically): ```console $ sudo vgcreate docker /dev/xvdf Volume group "docker" successfully created ``` Create two logical volumes named thinpool and thinpoolmeta using the lvcreate command. The last parameter specifies the amount of free space to allow for automatic expanding of the data or metadata if space runs low, as a temporary stop-gap. These are the recommended values. Bounded code example (external data; do not execute automatically): ```console $ sudo lvcreate --wipesignatures y -n thinpool docker -l 95%VG Logical volume "thinpool" created. $ sudo lvcreate --wipesignatures y -n thinpoolmeta docker -l 1%VG Logical volume "thinpoolmeta" created. ``` Convert the volumes to a thin pool and a storage location for metadata for the thin pool, using the lvconvert command. Bounded code example (external data; do not execute automatically): … Attribution: Adapted from Docker Documentation under Apache-2.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.