Automatic partition expansion for ECS instances on the platform is performed by Cloud-init. The issue may stem from a lack of tools such as growpart in the Linux instance or incorrect configuration of the cloud.cfg file.

Solutions

Execute the following command in the faulty instance to check whether growpart is installed.

which growpart

If no output is displayed, the tool is not installed. Execute the following command to install the automatic expansion dependency tool.

CentOS
Debian/Ubuntu

sudo yum -y install cloud-utils-growpart

If an output is displayed, the tool is installed. Continue with the follow-up procedures.

Execute the following command to check whether information about the growpart and resizefs tools exists in the /etc/cloud/cloud.cfg file.

cat /etc/cloud/cloud.cfg

Correct sample output:

If no relevant content is displayed in the output, follow the following steps to supplement the content.

Execute the following command to open the Cloud-init configuration file.

vim /etc/cloud/cloud.cfg

In the cloud_init_modules module, add information about the growpart and resizefs tools (as shown in the preceding Correct sample output).

Press the Esc key to exit edit mode, enter :wq, and then press Enter to save and exit the file.

If relevant content is displayed in the output, the issue is resolved.

Last updated: 2026.04.13 16:50:02

Public security network record in Beijing: No. 11010802032137