| package requirement | |
| import ( | |
| "os" | |
| "strings" | |
| "github.com/moby/moby/v2/pkg/parsers/kernel" | |
| "gotest.tools/v3/icmd" | |
| ) | |
| // CgroupNamespacesEnabled checks if cgroup namespaces are enabled on this host | |
| func CgroupNamespacesEnabled() bool { | |
| if _, err := os.Stat("/proc/self/ns/cgroup"); os.IsNotExist(err) { | |
| return false | |
| } | |
| return true | |
| } | |
| 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 | |
| } |