jschoubben
995f8237ce
A full / made every check on shanks end 'store never became ready' with the reason erased by --rm. Builds now remove their local image tag, narrowed source and context clone; a build or check refuses under 20 GiB free on / and the workspace, saying so; the throwaway store is no longer started with --rm and a store that does not come up reports its exit code and last 20 log lines.
47 lines
1.4 KiB
Go
47 lines
1.4 KiB
Go
package builder
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import (
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"fmt"
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"os"
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"path/filepath"
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"syscall"
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)
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// FreeSpaceFloor is the free space a build node must have, on / and on its workspace's filesystem, before it takes
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// a build or a check (novox/hq issue 1834): under it, a throwaway store cannot initialise its data directory and
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// dies at once, and the check ended "never became ready" instead of saying the disk was full.
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const FreeSpaceFloor = 20 << 30
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// FreeBytes reads the bytes an unprivileged writer can still use on the filesystem holding path. A variable so a
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// test answers for a disk it does not have.
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var FreeBytes = func(path string) (uint64, error) {
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var s syscall.Statfs_t
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if err := syscall.Statfs(path, &s); err != nil {
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return 0, err
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}
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return s.Bavail * uint64(s.Bsize), nil
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}
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// RoomToWork refuses, saying how much is free, when any of the paths' filesystems is under FreeSpaceFloor. A path
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// that does not exist yet (a workspace not made) is read at its nearest folder that does.
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func RoomToWork(paths ...string) error {
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for _, p := range paths {
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at := p
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for {
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if _, err := os.Stat(at); err == nil || filepath.Dir(at) == at {
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break
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}
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at = filepath.Dir(at)
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}
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free, err := FreeBytes(at)
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if err != nil {
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return fmt.Errorf("the free space on %s cannot be read: %w", p, err)
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}
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if free < FreeSpaceFloor {
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return fmt.Errorf("the build node has %d GiB free on %s, under the floor of %d GiB",
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free>>30, p, FreeSpaceFloor>>30)
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}
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}
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return nil
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}
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