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moby--moby/daemon/info_unix.go
Sebastiaan van Stijn 6f70946a27
Add warning to /info if KernelMemoryTCP is not supported
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2018-11-27 22:47:39 +01:00

172 lines
5.5 KiB
Go

// +build !windows
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"os/exec"
"strings"
"github.com/docker/docker/api/types"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/pkg/sysinfo"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// fillPlatformInfo fills the platform related info.
func (daemon *Daemon) fillPlatformInfo(v *types.Info, sysInfo *sysinfo.SysInfo) {
v.MemoryLimit = sysInfo.MemoryLimit
v.SwapLimit = sysInfo.SwapLimit
v.KernelMemory = sysInfo.KernelMemory
v.KernelMemoryTCP = sysInfo.KernelMemoryTCP
v.OomKillDisable = sysInfo.OomKillDisable
v.CPUCfsPeriod = sysInfo.CPUCfsPeriod
v.CPUCfsQuota = sysInfo.CPUCfsQuota
v.CPUShares = sysInfo.CPUShares
v.CPUSet = sysInfo.Cpuset
v.Runtimes = daemon.configStore.GetAllRuntimes()
v.DefaultRuntime = daemon.configStore.GetDefaultRuntimeName()
v.InitBinary = daemon.configStore.GetInitPath()
defaultRuntimeBinary := daemon.configStore.GetRuntime(v.DefaultRuntime).Path
if rv, err := exec.Command(defaultRuntimeBinary, "--version").Output(); err == nil {
parts := strings.Split(strings.TrimSpace(string(rv)), "\n")
if len(parts) == 3 {
parts = strings.Split(parts[1], ": ")
if len(parts) == 2 {
v.RuncCommit.ID = strings.TrimSpace(parts[1])
}
}
if v.RuncCommit.ID == "" {
logrus.Warnf("failed to retrieve %s version: unknown output format: %s", defaultRuntimeBinary, string(rv))
v.RuncCommit.ID = "N/A"
}
} else {
logrus.Warnf("failed to retrieve %s version: %v", defaultRuntimeBinary, err)
v.RuncCommit.ID = "N/A"
}
// runc is now shipped as a separate package. Set "expected" to same value
// as "ID" to prevent clients from reporting a version-mismatch
v.RuncCommit.Expected = v.RuncCommit.ID
if rv, err := daemon.containerd.Version(context.Background()); err == nil {
v.ContainerdCommit.ID = rv.Revision
} else {
logrus.Warnf("failed to retrieve containerd version: %v", err)
v.ContainerdCommit.ID = "N/A"
}
// containerd is now shipped as a separate package. Set "expected" to same
// value as "ID" to prevent clients from reporting a version-mismatch
v.ContainerdCommit.Expected = v.ContainerdCommit.ID
defaultInitBinary := daemon.configStore.GetInitPath()
if rv, err := exec.Command(defaultInitBinary, "--version").Output(); err == nil {
ver, err := parseInitVersion(string(rv))
if err != nil {
logrus.Warnf("failed to retrieve %s version: %s", defaultInitBinary, err)
}
v.InitCommit = ver
} else {
logrus.Warnf("failed to retrieve %s version: %s", defaultInitBinary, err)
v.InitCommit.ID = "N/A"
}
if !v.MemoryLimit {
v.Warnings = append(v.Warnings, "WARNING: No memory limit support")
}
if !v.SwapLimit {
v.Warnings = append(v.Warnings, "WARNING: No swap limit support")
}
if !v.KernelMemory {
v.Warnings = append(v.Warnings, "WARNING: No kernel memory limit support")
}
if !v.KernelMemoryTCP {
v.Warnings = append(v.Warnings, "WARNING: No kernel memory TCP limit support")
}
if !v.OomKillDisable {
v.Warnings = append(v.Warnings, "WARNING: No oom kill disable support")
}
if !v.CPUCfsQuota {
v.Warnings = append(v.Warnings, "WARNING: No cpu cfs quota support")
}
if !v.CPUCfsPeriod {
v.Warnings = append(v.Warnings, "WARNING: No cpu cfs period support")
}
if !v.CPUShares {
v.Warnings = append(v.Warnings, "WARNING: No cpu shares support")
}
if !v.CPUSet {
v.Warnings = append(v.Warnings, "WARNING: No cpuset support")
}
if !v.IPv4Forwarding {
v.Warnings = append(v.Warnings, "WARNING: IPv4 forwarding is disabled")
}
if !v.BridgeNfIptables {
v.Warnings = append(v.Warnings, "WARNING: bridge-nf-call-iptables is disabled")
}
if !v.BridgeNfIP6tables {
v.Warnings = append(v.Warnings, "WARNING: bridge-nf-call-ip6tables is disabled")
}
}
func fillDriverWarnings(v *types.Info) {
for _, pair := range v.DriverStatus {
if pair[0] == "Data loop file" {
msg := fmt.Sprintf("WARNING: %s: usage of loopback devices is "+
"strongly discouraged for production use.\n "+
"Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.", v.Driver)
v.Warnings = append(v.Warnings, msg)
continue
}
if pair[0] == "Supports d_type" && pair[1] == "false" {
backingFs := getBackingFs(v)
msg := fmt.Sprintf("WARNING: %s: the backing %s filesystem is formatted without d_type support, which leads to incorrect behavior.\n", v.Driver, backingFs)
if backingFs == "xfs" {
msg += " Reformat the filesystem with ftype=1 to enable d_type support.\n"
}
msg += " Running without d_type support will not be supported in future releases."
v.Warnings = append(v.Warnings, msg)
continue
}
}
}
func getBackingFs(v *types.Info) string {
for _, pair := range v.DriverStatus {
if pair[0] == "Backing Filesystem" {
return pair[1]
}
}
return ""
}
// parseInitVersion parses a Tini version string, and extracts the version.
func parseInitVersion(v string) (types.Commit, error) {
version := types.Commit{ID: "", Expected: dockerversion.InitCommitID}
parts := strings.Split(strings.TrimSpace(v), " - ")
if len(parts) >= 2 {
gitParts := strings.Split(parts[1], ".")
if len(gitParts) == 2 && gitParts[0] == "git" {
version.ID = gitParts[1]
version.Expected = dockerversion.InitCommitID[0:len(version.ID)]
}
}
if version.ID == "" && strings.HasPrefix(parts[0], "tini version ") {
version.ID = "v" + strings.TrimPrefix(parts[0], "tini version ")
}
if version.ID == "" {
version.ID = "N/A"
return version, errors.Errorf("unknown output format: %s", v)
}
return version, nil
}