Version: 3.2

Expand your storage pool size with disks managed by Portworx in GCP Anthos

If you're running on the cloud, consider automation into your decision for which pool resize approach you use. The pxctl service pool expand command allows you to perform resize operations without manually adding new drives or increasing drive capacity on your cluster.

When you enter the pxctl service pool expand command, Portworx uses your cloud provider's API to create new drives and attach them or to expand the existing drives with no further input from you.

You can control the pool expand operation by specifying which operation you want to use: resize-drive or add-drive, or you can specify auto to let Portworx determine the best way to resize your storage pools based on your cloud provider.

By default, each pool can have a maximum of 6 drives. If required, you can use the runtime option limit_drives_per_pool to change this value.

The following table shows the maximum number of drives (which includes boot drives, Portworx cloud drives, and any other drives) for various platforms:

Platform	Maximum number of drives
GCP	8
vSphere	12

Automatically expand a cloud-based pool

Run the following command to find the UUID for a pool:
```
pxctl service pool show
```

PX drive configuration:
Pool ID: 0
        UUID:  xxxxxxxx-xxxx-xxxx-xxxx-aef346e61d89
        IO Priority:  HIGH
        Labels:  iopriority=HIGH,medium=STORAGE_MEDIUM_SSD
        Size: 384 GiB
        Status: Online
        Has metadata:  Yes
        Balanced:  Yes
        Drives:
        1: /dev/sde, Total size 128 GiB, Online
        2: /dev/sdf, Total size 128 GiB, Online
        3: /dev/sdg, Total size 128 GiB, Online
        Cache Drives:
        No Cache drives found in this pool
Journal Device:
        1: /dev/sdc1, STORAGE_MEDIUM_SSD

Expand a cloud-based pool by entering the pxctl service pool expand command with the following options:
- The --operation option to specify the desired operation
- The --size option to set the minimum new size of the pool in GiB
- The --uid option to provide the ID of the pool you want to resize
```
pxctl service pool expand --operation auto --size 1000 --uid <pool-UUID>
```
For example:

pxctl service pool expand --operation auto --size 1000 --uid xxxxxxxx-xxxx-xxxx-xxxx-aef346e61d89

Once you submit the command, Portworx will expand the storage pool in the background. You can list the storage pools periodically to check if they have finished expansion.
```
pxctl cluster provision-status
```
When invoked on the Portworx node where the storage pool resides, the following command provides detailed information about the status of the pool expand process.
```
pxctl service pool show
```

Resize or add a new drive to a cloud-based pool

The auto operation automatically expands your pool capacity by increasing the pool size or adding the new drives to it. To perform a specific operation, replace auto with resize-drive or add-drive:

pxctl service pool expand --operation resize-drive --uid <pool-ID> --size <new-storage-pool-size-in-GiB>

Automatically expand a cloud-based pool​

Resize or add a new drive to a cloud-based pool​

Automatically expand a cloud-based pool

Resize or add a new drive to a cloud-based pool