forked from wrenn/wrenn
pptx704
eaa6b8576d
Migrate the entire VM layer from Firecracker to Cloud Hypervisor (CH). CH provides native snapshot/restore via its HTTP API, eliminating the need for custom UFFD handling, memfile processing, and snapshot header management that Firecracker required. Key changes: - Remove fc.go, jailer.go (FC process management) - Remove internal/uffd/ package (userfaultfd lazy page loading) - Remove snapshot/header.go, mapping.go, memfile.go (FC snapshot format) - Add ch.go (CH HTTP API client over Unix socket) - Add process.go (CH process lifecycle with unshare+netns) - Add chversion.go (CH version detection) - Refactor sandbox manager: remove UFFD socket tracking, snapshot parent/diff chaining, FC-specific balloon logic; add crash watcher - Simplify snapshot/local.go to CH's native snapshot format - Update VM config: FirecrackerBin → VMMBin, new CH-specific fields - Update envdclient, devicemapper, network for CH compatibility
29 lines
745 B
Go
29 lines
745 B
Go
package sandbox
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import (
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"fmt"
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"os/exec"
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"strings"
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)
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// DetectCHVersion runs the cloud-hypervisor binary with --version and
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// parses the semver from the output (e.g. "cloud-hypervisor v43.0" → "43.0").
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func DetectCHVersion(binaryPath string) (string, error) {
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out, err := exec.Command(binaryPath, "--version").Output()
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if err != nil {
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return "", fmt.Errorf("run %s --version: %w", binaryPath, err)
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}
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line := strings.TrimSpace(string(out))
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for field := range strings.FieldsSeq(line) {
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v := strings.TrimPrefix(field, "v")
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if v != field || strings.Contains(field, ".") {
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if strings.Count(v, ".") >= 1 {
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return v, nil
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}
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}
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}
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return "", fmt.Errorf("could not parse version from cloud-hypervisor output: %q", line)
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}
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