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mounts_linux.go
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mounts_linux.go
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// Copyright (c) 2022-2023, Sylabs Inc. All rights reserved.
// This software is licensed under a 3-clause BSD license. Please consult the
// LICENSE.md file distributed with the sources of this project regarding your
// rights to use or distribute this software.
// Package oci implements a Launcher that will configure and launch a container
// with an OCI runtime. It also provides implementations of OCI state
// transitions that can be called directly, Create/Start/Kill etc.
package oci
import (
"errors"
"fmt"
"os"
"path/filepath"
"strings"
"github.com/opencontainers/runtime-spec/specs-go"
"github.com/samber/lo"
"github.com/sylabs/singularity/v4/internal/pkg/buildcfg"
"github.com/sylabs/singularity/v4/internal/pkg/util/fs"
"github.com/sylabs/singularity/v4/internal/pkg/util/fs/fuse"
"github.com/sylabs/singularity/v4/internal/pkg/util/gpu"
"github.com/sylabs/singularity/v4/internal/pkg/util/rootless"
"github.com/sylabs/singularity/v4/internal/pkg/util/user"
"github.com/sylabs/singularity/v4/pkg/image"
"github.com/sylabs/singularity/v4/pkg/sylog"
"github.com/sylabs/singularity/v4/pkg/util/bind"
"github.com/sylabs/singularity/v4/pkg/util/slice"
)
const (
containerLibDir = "/.singularity.d/libs"
tmpDir = "/tmp"
varTmpDir = "/var/tmp"
)
// getMounts returns a mount list for the container's OCI runtime spec.
func (l *Launcher) getMounts() ([]specs.Mount, error) {
mounts := &[]specs.Mount{}
if err := l.addProcMount(mounts); err != nil {
return nil, fmt.Errorf("while configuring proc mount: %w", err)
}
if err := l.addSysMount(mounts); err != nil {
return nil, fmt.Errorf("while configuring sys mount: %w", err)
}
if err := l.addDevMounts(mounts); err != nil {
return nil, fmt.Errorf("while configuring devpts mount: %w", err)
}
// To facilitate handleVarTmpToTmpSymlink(), store indices of mounts added
// by addTmpMounts(), in addition to adding them to spec.
mountsCount := len(*mounts)
if err := l.addTmpMounts(mounts); err != nil {
return nil, fmt.Errorf("while configuring tmp mounts: %w", err)
}
for mountsCount < len(*mounts) {
l.defaultTmpMountIndices = append(l.defaultTmpMountIndices, mountsCount)
mountsCount++
}
if err := l.addHomeMount(mounts); err != nil {
return nil, fmt.Errorf("while configuring home mount: %w", err)
}
if err := l.addScratchMounts(mounts); err != nil {
return nil, fmt.Errorf("while configuring scratch mount(s): %w", err)
}
// System bind path mounts (singularity.conf) are only added with --no-compat (native emulation)
if l.cfg.NoCompat {
if err := l.addSystemBindMounts(mounts); err != nil {
return nil, fmt.Errorf("while configuring system bind mount(s): %w", err)
}
}
if err := l.addUserBindMounts(mounts); err != nil {
return nil, fmt.Errorf("while configuring user bind mount(s): %w", err)
}
if l.cfg.NoCompat {
if err := l.addCwdMount(mounts); err != nil {
return nil, fmt.Errorf("while configuring cwd mount: %w", err)
}
}
if (l.cfg.Rocm || l.singularityConf.AlwaysUseRocm) && !l.cfg.NoRocm {
if err := l.addRocmMounts(mounts); err != nil {
return nil, fmt.Errorf("while configuring ROCm mount(s): %w", err)
}
}
if (l.cfg.Nvidia || l.singularityConf.AlwaysUseNv) && !l.cfg.NoNvidia {
if err := l.addNvidiaMounts(mounts); err != nil {
return nil, fmt.Errorf("while configuring Nvidia mount(s): %w", err)
}
}
if len(l.cfg.ContainLibs) > 0 {
if err := l.addLibrariesMounts(mounts); err != nil {
return nil, fmt.Errorf("while configuring containlibs mount(s): %w", err)
}
}
return *mounts, nil
}
// addTmpMounts adds mounts for /tmp and /var/tmp in the container.
func (l *Launcher) addTmpMounts(mounts *[]specs.Mount) error {
if !l.singularityConf.MountTmp {
sylog.Debugf("Skipping mount of /tmp due to singularity.conf")
return nil
}
if slice.ContainsString(l.cfg.NoMount, "tmp") {
sylog.Debugf("Skipping mount of /tmp due to --no-mount")
return nil
}
// Non-OCI compatibility, i.e. native mode emulation, binds from host by default.
if l.cfg.NoCompat && !l.cfg.Contain && !l.cfg.ContainAll {
return l.addTmpBinds(mounts)
}
if len(l.cfg.WorkDir) > 0 {
sylog.Debugf("WorkDir specification provided: %s", l.cfg.WorkDir)
const (
tmpSrcSubdir = "tmp"
vartmpSrcSubdir = "var_tmp"
)
workdir, err := filepath.Abs(filepath.Clean(l.cfg.WorkDir))
if err != nil {
return fmt.Errorf("can't determine absolute path of workdir %s: %s", workdir, err)
}
tmpSrc := filepath.Join(workdir, tmpSrcSubdir)
vartmpSrc := filepath.Join(workdir, vartmpSrcSubdir)
if err := fs.Mkdir(tmpSrc, os.ModeSticky|0o777); err != nil && !os.IsExist(err) {
return fmt.Errorf("failed to create %s: %s", tmpSrc, err)
}
if err := fs.Mkdir(vartmpSrc, os.ModeSticky|0o777); err != nil && !os.IsExist(err) {
return fmt.Errorf("failed to create %s: %s", vartmpSrc, err)
}
opts := []string{
"rbind",
"relatime",
"mode=777",
}
if !l.cfg.AllowSUID {
opts = append(opts, "nosuid")
}
*mounts = append(*mounts,
specs.Mount{
Destination: tmpDir,
Type: "none",
Source: tmpSrc,
Options: opts,
},
specs.Mount{
Destination: varTmpDir,
Type: "none",
Source: vartmpSrc,
Options: opts,
},
)
return nil
}
sylog.Debugf(("No workdir specification provided. Proceeding with tmpfs mounts for /tmp and /var/tmp"))
*mounts = append(*mounts,
specs.Mount{
Destination: tmpDir,
Type: "tmpfs",
Source: "tmpfs",
Options: []string{
"nosuid",
"relatime",
"mode=777",
fmt.Sprintf("size=%dm", l.singularityConf.SessiondirMaxSize),
},
},
specs.Mount{
Destination: varTmpDir,
Type: "tmpfs",
Source: "tmpfs",
Options: []string{
"nosuid",
"relatime",
"mode=777",
fmt.Sprintf("size=%dm", l.singularityConf.SessiondirMaxSize),
},
},
)
return nil
}
// addTmpBinds adds tmpfs bind mounts from /tmp and /var/tmp on the host, into the container.
func (l *Launcher) addTmpBinds(mounts *[]specs.Mount) error {
err := l.addBindMount(mounts,
bind.Path{
Source: tmpDir,
Destination: tmpDir,
},
l.cfg.AllowSUID)
if err != nil {
return err
}
return l.addBindMount(mounts,
bind.Path{
Source: varTmpDir,
Destination: varTmpDir,
},
l.cfg.AllowSUID)
}
// addDevMounts adds mounts to assemble a minimal /dev in the container.
func (l *Launcher) addDevMounts(mounts *[]specs.Mount) error {
if l.singularityConf.MountDev == "no" {
return fmt.Errorf("OCI-mode requires /dev to be mounted, but 'mount dev = no' in singularity.conf")
}
if slice.ContainsString(l.cfg.NoMount, "dev") {
return fmt.Errorf("OCI-mode requires /dev to be mounted, but '--no-mount dev' was requested")
}
// When emulating native runtime (--no-compat), the default is to bind all of /dev into
// the container. If --contain / --containall is used, or `mount dev = minimal` in
// singularity.conf, then we use an OCI-like minimal dev.
contained := l.cfg.Contain || l.cfg.ContainAll
minimalDev := contained || (l.singularityConf.MountDev == "minimal")
// Binding all of /dev like native mode only works with crun
if l.cfg.NoCompat && !minimalDev {
rt, err := Runtime()
if err != nil {
return err
}
if filepath.Base(rt) == "crun" {
return l.addDevBind(mounts)
}
sylog.Warningf("Can only bind /dev when using 'crun' as OCI runtime. Currently using %q. Will use minimal /dev.", rt)
}
*mounts = append(*mounts,
specs.Mount{
Destination: "/dev",
Type: "tmpfs",
Source: "tmpfs",
Options: []string{
"nosuid",
"strictatime",
"mode=755",
fmt.Sprintf("size=%dm", l.singularityConf.SessiondirMaxSize),
},
},
specs.Mount{
Destination: "/dev/shm",
Type: "tmpfs",
Source: "shm",
Options: []string{
"nosuid",
"noexec",
"nodev",
"mode=1777",
fmt.Sprintf("size=%dm", l.singularityConf.SessiondirMaxSize),
},
},
specs.Mount{
Destination: "/dev/mqueue",
Type: "mqueue",
Source: "mqueue",
Options: []string{"nosuid", "noexec", "nodev"},
},
)
return l.addDevPtsMount(mounts)
}
// addDevPtsMount adds a devpts mount in the container
func (l *Launcher) addDevPtsMount(mounts *[]specs.Mount) error {
if !l.singularityConf.MountDevPts {
return fmt.Errorf("OCI-mode requires /dev/pts to be mounted, but 'mount devpts = no' in singularity.conf")
}
if slice.ContainsString(l.cfg.NoMount, "devpts") {
return fmt.Errorf("OCI-mode requires /dev/pts to be mounted, but '--no-mount devpts' was requested")
}
ptsMount := specs.Mount{
Destination: "/dev/pts",
Type: "devpts",
Source: "devpts",
Options: []string{"nosuid", "noexec", "newinstance", "ptmxmode=0666", "mode=0620"},
}
rootlessUID, err := rootless.Getuid()
if err != nil {
return fmt.Errorf("while fetching uid: %w", err)
}
if rootlessUID == 0 {
group, err := user.GetGrNam("tty")
if err != nil {
return fmt.Errorf("while identifying tty gid: %w", err)
}
ptsMount.Options = append(ptsMount.Options, fmt.Sprintf("gid=%d", group.GID))
}
*mounts = append(*mounts, ptsMount)
return nil
}
// addDevBind bind mounts all of /dev into the container.
func (l *Launcher) addDevBind(mounts *[]specs.Mount) error {
*mounts = append(*mounts,
specs.Mount{
Destination: "/dev",
Type: "bind",
Source: "/dev",
Options: []string{
"nosuid",
"rprivate",
"rbind",
"rw",
},
},
)
// Still need a /dev/pts mount with correct perms
return l.addDevPtsMount(mounts)
}
// addProcMount adds the /proc tree in the container.
func (l *Launcher) addProcMount(mounts *[]specs.Mount) error {
if !l.singularityConf.MountProc {
sylog.Debugf("Skipping mount of /proc due to singularity.conf")
return nil
}
if slice.ContainsString(l.cfg.NoMount, "proc") {
sylog.Debugf("Skipping mount of /proc due to --no-mount")
return nil
}
if l.cfg.Namespaces.NoPID {
return l.addBindMount(mounts,
bind.Path{
Source: "/proc",
Destination: "/proc",
},
false)
}
*mounts = append(*mounts,
specs.Mount{
Source: "proc",
Destination: "/proc",
Type: "proc",
Options: []string{"nosuid", "noexec", "nodev"},
})
return nil
}
// addSysMount adds the /sys tree in the container.
func (l *Launcher) addSysMount(mounts *[]specs.Mount) error {
if !l.singularityConf.MountSys {
sylog.Debugf("Skipping mount of /sys due to singularity.conf")
return nil
}
if slice.ContainsString(l.cfg.NoMount, "sys") {
sylog.Debugf("Skipping mount of /sys due to --no-mount")
return nil
}
rootlessUID, err := rootless.Getuid()
if err != nil {
return fmt.Errorf("while fetching uid: %w", err)
}
if rootlessUID == 0 {
*mounts = append(*mounts,
specs.Mount{
Source: "sysfs",
Destination: "/sys",
Type: "sysfs",
Options: []string{"nosuid", "noexec", "nodev", "ro"},
})
} else {
*mounts = append(*mounts,
specs.Mount{
Source: "/sys",
Destination: "/sys",
Type: "none",
Options: []string{"rbind", "nosuid", "noexec", "nodev", "ro"},
})
}
return nil
}
// addHomeMount adds the user home directory to the container, according to the
// src and dest computed by parseHomeDir from launcher.New.
func (l *Launcher) addHomeMount(mounts *[]specs.Mount) error {
if !l.singularityConf.MountHome {
sylog.Debugf("Skipping mount of $HOME due to singularity.conf")
return nil
}
if l.cfg.NoHome {
sylog.Debugf("Skipping mount of $HOME due to --no-home")
return nil
}
if slice.ContainsString(l.cfg.NoMount, "home") {
sylog.Debugf("Skipping mount of /home due to --no-mount")
return nil
}
if l.homeDest == "" {
return fmt.Errorf("cannot add home mount with empty destination")
}
// In --no-compat we bind $HOME from host like native mode default.
if l.cfg.NoCompat && l.homeSrc == "" {
l.homeSrc = l.homeHost
}
// If l.homeSrc is set, then we are simply bind mounting from the host.
if l.homeSrc != "" {
return l.addBindMount(mounts,
bind.Path{
Source: l.homeSrc,
Destination: l.homeDest,
},
l.cfg.AllowSUID)
}
// Otherwise we setup a tmpfs, mounted onto l.homeDst.
tmpfsOpt := []string{
"relatime",
"mode=755",
fmt.Sprintf("size=%dm", l.singularityConf.SessiondirMaxSize),
}
if !l.cfg.AllowSUID {
tmpfsOpt = append(tmpfsOpt, "nosuid")
}
// If we aren't using fakeroot, ensure the tmpfs ownership is correct for our real uid/gid.
if !l.cfg.Fakeroot {
uid, err := rootless.Getuid()
if err != nil {
return fmt.Errorf("while fetching uid: %w", err)
}
gid, err := rootless.Getgid()
if err != nil {
return fmt.Errorf("while fetching gid: %w", err)
}
tmpfsOpt = append(tmpfsOpt,
fmt.Sprintf("uid=%d", uid),
fmt.Sprintf("gid=%d", gid),
)
}
*mounts = append(*mounts,
specs.Mount{
Destination: l.homeDest,
Type: "tmpfs",
Source: "tmpfs",
Options: tmpfsOpt,
})
return nil
}
// addScratchMounts adds tmpfs mounts for scratch directories in the container.
func (l *Launcher) addScratchMounts(mounts *[]specs.Mount) error {
const scratchContainerDirName = "/scratch"
if len(l.cfg.WorkDir) > 0 {
workdir, err := filepath.Abs(filepath.Clean(l.cfg.WorkDir))
if err != nil {
return fmt.Errorf("can't determine absolute path of workdir %s: %s", workdir, err)
}
scratchContainerDirPath := filepath.Join(workdir, scratchContainerDirName)
if err := fs.Mkdir(scratchContainerDirPath, os.ModeSticky|0o777); err != nil && !os.IsExist(err) {
return fmt.Errorf("failed to create %s: %s", scratchContainerDirPath, err)
}
for _, s := range l.cfg.ScratchDirs {
scratchDirPath := filepath.Join(scratchContainerDirPath, s)
if err := fs.Mkdir(scratchDirPath, os.ModeSticky|0o777); err != nil && !os.IsExist(err) {
return fmt.Errorf("failed to create %s: %s", scratchDirPath, err)
}
opts := []string{
"rbind",
"relatime",
"nodev",
}
if !l.cfg.AllowSUID {
opts = append(opts, "nosuid")
}
*mounts = append(*mounts,
specs.Mount{
Destination: s,
Type: "",
Source: scratchDirPath,
Options: opts,
},
)
}
} else {
opts := []string{
"relatime",
"nodev",
fmt.Sprintf("size=%dm", l.singularityConf.SessiondirMaxSize),
}
if !l.cfg.AllowSUID {
opts = append(opts, "nosuid")
}
for _, s := range l.cfg.ScratchDirs {
*mounts = append(*mounts,
specs.Mount{
Destination: s,
Type: "tmpfs",
Source: "tmpfs",
Options: opts,
},
)
}
}
return nil
}
func (l *Launcher) addSystemBindMounts(mounts *[]specs.Mount) error {
if slice.ContainsString(l.cfg.NoMount, "bind-paths") {
sylog.Debugf("Skipping singularity.conf bind path entries due to --no-mount bind-paths")
return nil
}
binds, err := bind.ParseBindPath(strings.Join(l.singularityConf.BindPath, ","))
if err != nil {
return fmt.Errorf("while parsing singularity.conf bind path: %w", err)
}
// Now add binds from one or more --mount and env var.
for _, m := range l.cfg.Mounts {
bps, err := bind.ParseMountString(m)
if err != nil {
return fmt.Errorf("while parsing mount %q: %w", m, err)
}
binds = append(binds, bps...)
}
for _, b := range binds {
if slice.ContainsString(l.cfg.NoMount, b.Destination) {
continue
}
if err := l.addBindMount(mounts, b, l.cfg.AllowSUID); err != nil {
return fmt.Errorf("while adding mount %q: %w", b.Source, err)
}
}
return nil
}
func (l *Launcher) addUserBindMounts(mounts *[]specs.Mount) error {
if !l.singularityConf.UserBindControl {
sylog.Warningf("Ignoring bind mount request(s): user bind control disabled by system administrator")
return nil
}
// First get binds from -B/--bind and env var
binds, err := bind.ParseBindPath(strings.Join(l.cfg.BindPaths, ","))
if err != nil {
return fmt.Errorf("while parsing bind path: %w", err)
}
// Now add binds from one or more --mount and env var.
for _, m := range l.cfg.Mounts {
bps, err := bind.ParseMountString(m)
if err != nil {
return fmt.Errorf("while parsing mount %q: %w", m, err)
}
binds = append(binds, bps...)
}
for _, b := range binds {
// Special Case - user is manually requesting all of /dev to be bound
if b.Source == "/dev" {
if b.Destination != "/dev" {
return fmt.Errorf("host /dev may only be bound to /dev in container")
}
// Handle as we do in --no-compat, including devpts setup.
if err := l.addDevBind(mounts); err != nil {
return fmt.Errorf("while adding mount %q: %w", b.Source, err)
}
continue
}
// Anything else
if err := l.addBindMount(mounts, b, l.cfg.AllowSUID); err != nil {
return fmt.Errorf("while adding mount %q: %w", b.Source, err)
}
}
return nil
}
// addCwdMount adds the CWD to the container.
func (l *Launcher) addCwdMount(mounts *[]specs.Mount) error {
if slice.ContainsString(l.cfg.NoMount, "cwd") {
sylog.Debugf("Skipping mount of cwd due to --no-mount")
return nil
}
cwd, err := os.Getwd()
if err != nil {
return err
}
return l.addBindMount(mounts,
bind.Path{
Source: cwd,
Destination: cwd,
},
l.cfg.AllowSUID,
)
}
func (l *Launcher) addBindMount(mounts *[]specs.Mount, b bind.Path, allowSUID bool) (err error) {
// If request is for a /dev/xxx device, then we handle with device specific checks and flags.
if strings.HasPrefix(b.Source, "/dev") {
return addDevBindMount(mounts, b)
}
if b.ID() != "" || b.ImageSrc() != "" {
if !l.singularityConf.UserBindControl {
sylog.Warningf("Ignoring image bind mount request: user bind control disabled by system administrator")
return nil
}
im, err := l.prepareImageBindMount(b)
if err != nil {
return err
}
sylog.Debugf("mountpoint for image bind-mount is: %q", im.GetMountPoint())
bindMountSource := filepath.Join(im.GetMountPoint(), b.ImageSrc())
return l.addBindMount(
mounts,
bind.Path{
Source: bindMountSource,
Destination: b.Destination,
},
allowSUID,
)
}
// /proc and /sys need nosuid,noexec,nodev set explicitly for runc
// See: https://github.com/opencontainers/runc/discussions/3801
opts := map[string]bool{
"rbind": true,
"nodev": true,
}
if strings.HasPrefix(b.Source, "/proc") || strings.HasPrefix(b.Source, "/sys") {
opts["nosuid"] = true
opts["noexec"] = true
}
if !allowSUID {
opts["nosuid"] = true
}
if b.Readonly() {
opts["ro"] = true
}
absSource, err := filepath.Abs(b.Source)
if err != nil {
return fmt.Errorf("cannot determine absolute path of %s: %w", b.Source, err)
}
if _, err := os.Stat(absSource); err != nil {
_, ok := l.imageMountsByMountpoint[absSource]
if !(errors.Is(err, os.ErrNotExist) && ok) {
return fmt.Errorf("cannot stat bind source %s: %w", b.Source, err)
}
}
if !filepath.IsAbs(b.Destination) {
return fmt.Errorf("bind destination %s must be an absolute path", b.Destination)
}
sylog.Debugf("Adding bind of %s to %s, with options %v", absSource, b.Destination, opts)
*mounts = append(*mounts,
specs.Mount{
Source: absSource,
Destination: b.Destination,
Type: "none",
Options: lo.Keys(opts),
})
return nil
}
func (l *Launcher) prepareImageBindMount(bindPath bind.Path) (*fuse.ImageMount, error) {
imagePath := bindPath.Source
img, err := image.Init(imagePath, false)
if err != nil {
return nil, err
}
resolvedPath := img.Path
readonly := bindPath.Readonly()
sylog.Debugf("img is: %#v", img)
switch img.Type {
case image.SQUASHFS:
readonly = true
fallthrough
case image.EXT3:
if bindPath.ID() != "" {
return nil, fmt.Errorf("image %q does not support id values, but one was supplied (%q)", bindPath.ImageSrc(), bindPath.ID())
}
}
enclosingDir, err := os.MkdirTemp(buildcfg.SESSIONDIR, "fusemount-enclosure")
if err != nil {
return nil, err
}
im := fuse.ImageMount{
Type: img.Type,
Readonly: readonly,
SourcePath: resolvedPath,
EnclosingDir: enclosingDir,
AllowSetuid: l.cfg.AllowSUID,
AllowOther: true,
}
mountpoint := filepath.Join(enclosingDir, fmt.Sprintf("fusemount-%d", len(l.imageMountsByMountpoint)))
im.SetMountPoint(mountpoint)
if otherIm, ok := l.imageMountsByImagePath[resolvedPath]; ok && !otherIm.Readonly && !im.Readonly {
return nil, fmt.Errorf("image %q already mounted as writable once; cannot mount it again as writable at %q", resolvedPath, bindPath.Destination)
}
l.imageMountsByImagePath[resolvedPath] = &im
l.imageMountsByMountpoint[mountpoint] = &im
return &im, nil
}
func addDevBindMount(mounts *[]specs.Mount, b bind.Path) error {
opts := []string{"bind", "nosuid"}
if b.Readonly() {
opts = append(opts, "ro")
}
b.Source = filepath.Clean(b.Source)
if !strings.HasPrefix(b.Source, "/dev") {
return fmt.Errorf("device bind source must be an absolute path under /dev: %s", b.Source)
}
if b.Source != b.Destination {
return fmt.Errorf("device bind source %s must be the same as destination %s", b.Source, b.Destination)
}
if _, err := os.Stat(b.Source); err != nil {
return fmt.Errorf("cannot stat bind source %s: %w", b.Source, err)
}
sylog.Debugf("Adding device bind of %s to %s, with options %v", b.Source, b.Destination, opts)
*mounts = append(*mounts,
specs.Mount{
Source: b.Source,
Destination: b.Destination,
Type: "none",
Options: opts,
})
return nil
}
func (l *Launcher) addRocmMounts(mounts *[]specs.Mount) error {
gpuConfFile := filepath.Join(buildcfg.SINGULARITY_CONFDIR, "rocmliblist.conf")
libs, bins, err := gpu.RocmPaths(gpuConfFile)
if err != nil {
sylog.Warningf("While finding ROCm bind points: %v", err)
}
if len(libs) == 0 {
sylog.Warningf("Could not find any ROCm libraries on this host!")
}
devs, err := gpu.RocmDevices()
if err != nil {
sylog.Warningf("While finding ROCm devices: %v", err)
}
if len(devs) == 0 {
sylog.Warningf("Could not find any ROCm devices on this host!")
}
for _, binary := range bins {
containerBinary := filepath.Join("/usr/bin", filepath.Base(binary))
bind := bind.Path{
Source: binary,
Destination: containerBinary,
Options: map[string]*bind.Option{"ro": {}},
}
if err := l.addBindMount(mounts, bind, false); err != nil {
return err
}
}
for _, lib := range libs {
containerLib := filepath.Join(containerLibDir, filepath.Base(lib))
bind := bind.Path{
Source: lib,
Destination: containerLib,
Options: map[string]*bind.Option{"ro": {}},
}
if err := l.addBindMount(mounts, bind, false); err != nil {
return err
}
}
for _, dev := range devs {
bind := bind.Path{
Source: dev,
Destination: dev,
}
if err := addDevBindMount(mounts, bind); err != nil {
return err
}
}
return nil
}
func (l *Launcher) addNvidiaMounts(mounts *[]specs.Mount) error {
if l.singularityConf.UseNvCCLI {
sylog.Warningf("--nvccli not yet supported with --oci. Falling back to legacy --nv support.")
}
gpuConfFile := filepath.Join(buildcfg.SINGULARITY_CONFDIR, "nvliblist.conf")
libs, bins, err := gpu.NvidiaPaths(gpuConfFile)
if err != nil {
sylog.Warningf("While finding NVIDIA bind points: %v", err)
}
if len(libs) == 0 {
sylog.Warningf("Could not find any NVIDIA libraries on this host!")
}
ipcs, err := gpu.NvidiaIpcsPath()
if err != nil {
sylog.Warningf("While finding NVIDIA IPCs: %v", err)
}
devs, err := gpu.NvidiaDevices(true)
if err != nil {
sylog.Warningf("While finding NVIDIA devices: %v", err)
}
if len(devs) == 0 {
sylog.Warningf("Could not find any NVIDIA devices on this host!")
}
for _, binary := range bins {
containerBinary := filepath.Join("/usr/bin", filepath.Base(binary))
bind := bind.Path{
Source: binary,
Destination: containerBinary,
Options: map[string]*bind.Option{"ro": {}},
}
if err := l.addBindMount(mounts, bind, false); err != nil {
return err
}
}
for _, lib := range libs {
containerLib := filepath.Join(containerLibDir, filepath.Base(lib))
bind := bind.Path{
Source: lib,
Destination: containerLib,
Options: map[string]*bind.Option{"ro": {}},
}
if err := l.addBindMount(mounts, bind, false); err != nil {
return err
}
}
for _, ipc := range ipcs {
bind := bind.Path{
Source: ipc,
Destination: ipc,
}
if err := l.addBindMount(mounts, bind, false); err != nil {
return err
}
}
for _, dev := range devs {
bind := bind.Path{
Source: dev,
Destination: dev,
}
if err := addDevBindMount(mounts, bind); err != nil {
return err
}
}
return nil
}
func (l *Launcher) addLibrariesMounts(mounts *[]specs.Mount) error {
if !l.singularityConf.UserBindControl {
sylog.Warningf("Ignoring containlibs mount request: user bind control disabled by system administrator")
return nil
}
for _, lib := range l.cfg.ContainLibs {
containerLib := filepath.Join(containerLibDir, filepath.Base(lib))
bind := bind.Path{
Source: lib,
Destination: containerLib,
Options: map[string]*bind.Option{"ro": {}},
}
if err := l.addBindMount(mounts, bind, false); err != nil {
return err
}
}
return nil
}