| package requirement // import "github.com/docker/docker/integration/internal/requirement" |
| |
| import ( |
| "strings" |
| |
| "github.com/docker/docker/pkg/parsers/kernel" |
| "gotest.tools/icmd" |
| ) |
| |
| func overlayFSSupported() bool { |
| result := icmd.RunCommand("/bin/sh", "-c", "cat /proc/filesystems") |
| if result.Error != nil { |
| return false |
| } |
| return strings.Contains(result.Combined(), "overlay\n") |
| } |
| |
| // Overlay2Supported returns true if the current system supports overlay2 as graphdriver |
| func Overlay2Supported(kernelVersion string) bool { |
| if !overlayFSSupported() { |
| return false |
| } |
| |
| daemonV, err := kernel.ParseRelease(kernelVersion) |
| if err != nil { |
| return false |
| } |
| requiredV := kernel.VersionInfo{Kernel: 4} |
| return kernel.CompareKernelVersion(*daemonV, requiredV) > -1 |
| |
| } |
