假设我们有3台机器的Heketi集群。然后我想将我们的集群扩展到4台机器。它非常简单，我们只需要修改topology.json文件，然后运行：
heketi-cli -s http://localhost:8080 topology load --json=/root/topology.json
一切都还可以，但问题是 - 如何将现有砖块复制到新节点（设备）？因为现在我有：
heketi-cli -s http://localhost:8080 device info d7e1d2b21251175a0f5886da62509961
Device Id: d7e1d2b21251175a0f5886da62509961
Name: /dev/xvdc
State: online
Size (GiB): 29
Used (GiB): 26
Free (GiB): 3
Bricks:
Id:1131bf531f5ec7fda0dffbb489aef539 Size (GiB):1 Path: /var/lib/heketi/mounts/vg_d7e1d2b21251175a0f5886da62509961/brick_1131bf531f5ec7fda0dffbb489aef539/brick
Id:18e0d3b7f861e42a627ab641bfb58743 Size (GiB):1 Path: /var/lib/heketi/mounts/vg_d7e1d2b21251175a0f5886da62509961/brick_18e0d3b7f861e42a627ab641bfb58743/brick
Id:24af2e1bd6156dad98c08fcb404c719b Size (GiB):1 Path: /var/lib/heketi/mounts/vg_d7e1d2b21251175a0f5886da62509961/brick_24af2e1bd6156dad98c08fcb404c719b/brick
Id:5dfdaf49a7ce99785575de4cd86f073e Size (GiB):1 Path: /var/lib/heketi/mounts/vg_d7e1d2b21251175a0f5886da62509961/brick_5dfdaf49a7ce99785575de4cd86f073e/brick
Id:64eba4eda4d361ad031b37050d3707d0 Size (GiB):1 Path: /var/lib/heketi/mounts/vg_d7e1d2b21251175a0f5886da62509961/brick_64eba4eda4d361ad031b37050d3707d0/brick
Id:877f7b336ca3c565d2848c7e9fa1c697 Size (GiB):2 Path: /var/lib/heketi/mounts/vg_d7e1d2b21251175a0f5886da62509961/brick_877f7b336ca3c565d2848c7e9fa1c697/brick
Id:b0e3d55f2a2a2ab8a8ace73894fffd0e Size (GiB):1 Path: /var/lib/heketi/mounts/vg_d7e1d2b21251175a0f5886da62509961/brick_b0e3d55f2a2a2ab8a8ace73894fffd0e/brick
Id:d0bf036ef3f24b8b42203168d83dd959 Size (GiB):15 Path: /var/lib/heketi/mounts/vg_d7e1d2b21251175a0f5886da62509961/brick_d0bf036ef3f24b8b42203168d83dd959/brick
Id:dcd35d3fd860897fc9a9b6b8a818a0e8 Size (GiB):1 Path: /var/lib/heketi/mounts/vg_d7e1d2b21251175a0f5886da62509961/brick_dcd35d3fd860897fc9a9b6b8a818a0e8/brick
Id:f13cb21e3c1e753d0c8d7e2442240baa Size (GiB):2 Path: /var/lib/heketi/mounts/vg_d7e1d2b21251175a0f5886da62509961/brick_f13cb21e3c1e753d0c8d7e2442240baa/brick
在新节点上：
heketi-cli -s http://localhost:8080 device info d6bf7aeebeb1fbd6d3436937e6245628
Device Id: d6bf7aeebeb1fbd6d3436937e6245628
Name: /dev/xvdc
State: online
Size (GiB): 29
Used (GiB): 0
Free (GiB): 29
Bricks:
如果有人知道，如何解决这个问题，请帮助我。 谢谢@