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// +build !windows
package main
import (
"bytes"
"io/ioutil"
"os/exec"
"strings"
"github.com/docker/docker/pkg/parsers/kernel"
"github.com/docker/docker/pkg/sysinfo"
)
var (
// SysInfo stores information about which features a kernel supports.
SysInfo *sysinfo.SysInfo
)
func cpuCfsPeriod() bool { |
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return testEnv.DaemonInfo.CPUCfsPeriod |
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}
func cpuCfsQuota() bool { |
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return testEnv.DaemonInfo.CPUCfsQuota |
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}
func cpuShare() bool { |
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return testEnv.DaemonInfo.CPUShares |
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}
func oomControl() bool { |
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return testEnv.DaemonInfo.OomKillDisable |
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}
func pidsLimit() bool {
return SysInfo.PidsLimit
}
func kernelMemorySupport() bool { |
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return testEnv.DaemonInfo.KernelMemory |
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}
func memoryLimitSupport() bool { |
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return testEnv.DaemonInfo.MemoryLimit |
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}
func memoryReservationSupport() bool {
return SysInfo.MemoryReservation
}
func swapMemorySupport() bool { |
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return testEnv.DaemonInfo.SwapLimit |
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}
func memorySwappinessSupport() bool { |
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return SameHostDaemon() && SysInfo.MemorySwappiness |
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}
func blkioWeight() bool { |
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return SameHostDaemon() && SysInfo.BlkioWeight |
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}
func cgroupCpuset() bool { |
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return testEnv.DaemonInfo.CPUSet |
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}
func seccompEnabled() bool {
return supportsSeccomp && SysInfo.Seccomp
}
func bridgeNfIptables() bool {
return !SysInfo.BridgeNFCallIPTablesDisabled
}
func bridgeNfIP6tables() bool {
return !SysInfo.BridgeNFCallIP6TablesDisabled
}
func unprivilegedUsernsClone() bool {
content, err := ioutil.ReadFile("/proc/sys/kernel/unprivileged_userns_clone")
return err != nil || !strings.Contains(string(content), "0")
}
func ambientCapabilities() bool {
content, err := ioutil.ReadFile("/proc/self/status")
return err != nil || strings.Contains(string(content), "CapAmb:")
}
func overlayFSSupported() bool {
cmd := exec.Command(dockerBinary, "run", "--rm", "busybox", "/bin/sh", "-c", "cat /proc/filesystems")
out, err := cmd.CombinedOutput()
if err != nil {
return false
}
return bytes.Contains(out, []byte("overlay\n"))
}
func overlay2Supported() bool {
if !overlayFSSupported() {
return false
}
|
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daemonV, err := kernel.ParseRelease(testEnv.DaemonInfo.KernelVersion) |
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if err != nil {
return false
}
requiredV := kernel.VersionInfo{Kernel: 4}
return kernel.CompareKernelVersion(*daemonV, requiredV) > -1
}
func init() { |
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if SameHostDaemon() {
SysInfo = sysinfo.New(true)
} |
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} |