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