In VCI services that use image caching and have specified a system volume size, the following FailedCreateSystemDisk event occurs, resulting in pod creation failure:

FailedCreateSystemDisk​
The size of specified system disk is too small to meet the requirements of the target image cache​

Problem analysis

This issue typically arises when the system volume size specified via the vci.vke.volcengine.com/desired-system-storage annotation is smaller than the size of the image cache.

Solution

When specifying the system volume size, follow these guidelines:

Automatic image cache matching: Image size × (2 ~ 2.5). For example, if the image size selected for VCI creation is 20 GiB, you need to specify a system volume size of 40 GiB to 50 GiB.

Manually specified image cache: Image cache capacity + 20 GiB. For example, if your image cache size is 60 GiB, you need to specify a system volume size of 80 GiB. Therefore, you can adjust the system volume size or choose not to use image caching when creating the pod. For details, see Creating VCIs with automatic image caching and Creating VCIs with manual image caching.

Last updated: 2026.07.24 16:18:05

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