machine: ensure disk image is writable before resize (fix read-only image init failure)#28447
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jude-ruben wants to merge 1 commit intocontainers:mainfrom
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machine: ensure disk image is writable before resize (fix read-only image init failure)#28447jude-ruben wants to merge 1 commit intocontainers:mainfrom
jude-ruben wants to merge 1 commit intocontainers:mainfrom
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baude
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Apr 6, 2026
pkg/machine/stdpull/url.go
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| // Ensure image is writable | ||
| if err := os.Chmod(d.finalPath.GetPath(), 0600); err != nil { | ||
| return fmt.Errorf("failed to set permissions on machine image: %w", err) |
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would like it if you made this error message slightly different so anyone debugging could tell which path immediately they are on? so maybe failed to set permissions on pulled image %s ?
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did you confirm that any of the other providers also have this problem? |
baude
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Apr 6, 2026
pkg/machine/e2e/init_test.go
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| img := filepath.Join(GinkgoT().TempDir(),"test.qcow2") | ||
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| // Step 2: copy existing image | ||
| exec.Command("cp", mb.imagePath, img).Run() |
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maybe using install here is more efficient?
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@baude ,I verified this behavior only occurs for the QEMU provider. The pulled image is resized during |
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Problem
Initializing a Podman machine with a read-only disk image (e.g., chmod 444)
fails during the resize step with a permission denied error.
Root Cause
The disk image created from user input may retain read-only permissions.
The resize operation (qemu-img) requires write access but no step ensures
the image is writable before resizing.
Solution
Ensure the disk image is set to writable (0600) before resize operations
using os.Chmod.
Test
Added an e2e test:
podman machine initResult
Fixes #27576