Shulou(Shulou.com)06/02 Report--

The following is mainly used to expand the capacity of the pv created by ceph's rbd.

1. Query the rbd image corresponding to pv

Kubectl get pv pvc-name-o yaml | grep image

For example: kubernetes-dynamic-pvc-0fc6b77a-ac27-11e8-ae7c-0a580af40302

2. Get the node of the physical machine where the pod resides with the modified pv:

Kubectl get pod harbor-harbor-database-0-o wide

NAME READY STATUS RESTARTS AGE IP NODE

Harbor-harbor-database-0 1/1 Running 0 54m 10.244.1.130 vm102

3. View rbd image information:

# rbd info kubernetes-dynamic-pvc-0fc6b77a-ac27-11e8-ae7c-0a580af40302

Rbd image 'kubernetes-dynamic-pvc-0fc6b77a-ac27-11e8murae7cMur0a580af40302:

Size 8192 MB in 2048 objects

Order 22 (4096 kB objects)

Block_name_prefix: rbd_data.62226b8b4567

Format: 2

Features: layering

Flags:

Create_timestamp: Thu Aug 30 15:34:00 2018

# rbd disk-usage kubernetes-dynamic-pvc-0fc6b77a-ac27-11e8-ae7c-0a580af40302

Warning: fast-diff map is not enabled for kubernetes-dynamic-pvc-0fc6b77a-ac27-11e8-ae7c-0a580af40302. Operation may be slow.

NAME PROVISIONED USED

Kubernetes-dynamic-pvc-0fc6b77a-ac27-11e8-ae7c-0a580af40302 8192 M 676m

4. Modify the image size

Rbd resize-image kubernetes-dynamic-pvc-0fc6b77a-ac27-11e8-ae7c-0a580af40302-size 40960

5. Log in to the physical machine where pod resides, and query the mount point corresponding to pv:

Df-h | grep rbd

/ dev/rbd0 4.0G 700M 3.3G 18% / var/lib/kubelet/plugins/kubernetes.io/rbd/mounts/rbd-image-kubernetes-dynamic-pvc-0e294e02-acf9-11e8-ae7c-0a580af40302

6. Update size

Blockdev-getsize64 / dev/rbd0

Resize2fs / dev/rbd0

At this point, log in to pod and you can see that the pv volume has been expanded.

If not, consider restarting pod.

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