integration-cli/requirements_unix_test.go

   1 // +build !windows
   2
   3 package main
   4
   5 import (
   6         "bytes"
   7         "io/ioutil"
   8         "os/exec"
   9         "strings"
  10
  11         "github.com/docker/docker/pkg/parsers/kernel"
  12         "github.com/docker/docker/pkg/sysinfo"
  13 )
  14
  15 var (
  16         // SysInfo stores information about which features a kernel supports.
  17         SysInfo *sysinfo.SysInfo
  18 )
  19
  20 func cpuCfsPeriod() bool {
  21         return SysInfo.CPUCfsPeriod
  22 }
  23
  24 func cpuCfsQuota() bool {
  25         return SysInfo.CPUCfsQuota
  26 }
  27
  28 func cpuShare() bool {
  29         return SysInfo.CPUShares
  30 }
  31
  32 func oomControl() bool {
  33         return SysInfo.OomKillDisable
  34 }
  35
  36 func pidsLimit() bool {
  37         return SysInfo.PidsLimit
  38 }
  39
  40 func kernelMemorySupport() bool {
  41         return SysInfo.KernelMemory
  42 }
  43
  44 func memoryLimitSupport() bool {
  45         return SysInfo.MemoryLimit
  46 }
  47
  48 func memoryReservationSupport() bool {
  49         return SysInfo.MemoryReservation
  50 }
  51
  52 func swapMemorySupport() bool {
  53         return SysInfo.SwapLimit
  54 }
  55
  56 func memorySwappinessSupport() bool {
  57         return SysInfo.MemorySwappiness
  58 }
  59
  60 func blkioWeight() bool {
  61         return SysInfo.BlkioWeight
  62 }
  63
  64 func cgroupCpuset() bool {
  65         return SysInfo.Cpuset
  66 }
  67
  68 func seccompEnabled() bool {
  69         return supportsSeccomp && SysInfo.Seccomp
  70 }
  71
  72 func bridgeNfIptables() bool {
  73         return !SysInfo.BridgeNFCallIPTablesDisabled
  74 }
  75
  76 func bridgeNfIP6tables() bool {
  77         return !SysInfo.BridgeNFCallIP6TablesDisabled
  78 }
  79
  80 func unprivilegedUsernsClone() bool {
  81         content, err := ioutil.ReadFile("/proc/sys/kernel/unprivileged_userns_clone")
  82         return err != nil || !strings.Contains(string(content), "0")
  83 }
  84
  85 func ambientCapabilities() bool {
  86         content, err := ioutil.ReadFile("/proc/self/status")
  87         return err != nil || strings.Contains(string(content), "CapAmb:")
  88 }
  89
  90 func overlayFSSupported() bool {
  91         cmd := exec.Command(dockerBinary, "run", "--rm", "busybox", "/bin/sh", "-c", "cat /proc/filesystems")
  92         out, err := cmd.CombinedOutput()
  93         if err != nil {
  94                 return false
  95         }
  96         return bytes.Contains(out, []byte("overlay\n"))
  97 }
  98
  99 func overlay2Supported() bool {
 100         if !overlayFSSupported() {
 101                 return false
 102         }
 103
 104         daemonV, err := kernel.ParseRelease(testEnv.DaemonKernelVersion())
 105         if err != nil {
 106                 return false
 107         }
 108         requiredV := kernel.VersionInfo{Kernel: 4}
 109         return kernel.CompareKernelVersion(*daemonV, requiredV) > -1
 110
 111 }
 112
 113 func init() {
 114         SysInfo = sysinfo.New(true)
 115 }