1 // Copyright (C) The Arvados Authors. All rights reserved.
3 // SPDX-License-Identifier: AGPL-3.0
13 "golang.org/x/net/context"
16 type singularityExecutor struct {
17 logf func(string, ...interface{})
21 imageFilename string // "sif" image
24 func newSingularityExecutor(logf func(string, ...interface{})) (*singularityExecutor, error) {
25 tmpdir, err := ioutil.TempDir("", "crunch-run-singularity-")
29 return &singularityExecutor{
35 func (e *singularityExecutor) ImageLoaded(string) bool {
39 // LoadImage will satisfy ContainerExecuter interface transforming
40 // containerImage into a sif file for later use.
41 func (e *singularityExecutor) LoadImage(imageTarballPath string) error {
42 e.logf("building singularity image")
43 e.imageFilename = e.tmpdir + "/image.sif"
44 build := exec.Command("singularity", "build", e.imageFilename, "docker-archive://"+imageTarballPath)
45 e.logf("%v", build.Args)
46 out, err := build.CombinedOutput()
47 // INFO: Starting build...
48 // Getting image source signatures
49 // Copying blob ab15617702de done
50 // Copying config 651e02b8a2 done
51 // Writing manifest to image destination
53 // 2021/04/22 14:42:14 info unpack layer: sha256:21cbfd3a344c52b197b9fa36091e66d9cbe52232703ff78d44734f85abb7ccd3
54 // INFO: Creating SIF file...
55 // INFO: Build complete: arvados-jobs.latest.sif
63 func (e *singularityExecutor) Create(spec containerSpec) error {
68 func (e *singularityExecutor) Start() error {
69 args := []string{"singularity", "exec", "--containall", "--no-home", "--cleanenv"}
70 if !e.spec.EnableNetwork {
71 args = append(args, "--net", "--network=none")
73 readonlyflag := map[bool]string{
77 for path, mount := range e.spec.BindMounts {
78 args = append(args, "--bind", mount.HostPath+":"+path+":"+readonlyflag[mount.ReadOnly])
80 args = append(args, e.imageFilename)
81 args = append(args, e.spec.Command...)
83 // This is for singularity 3.5.2. There are some behaviors
84 // that will change in singularity 3.6, please see:
85 // https://sylabs.io/guides/3.7/user-guide/environment_and_metadata.html
86 // https://sylabs.io/guides/3.5/user-guide/environment_and_metadata.html
87 env := make([]string, 0, len(e.spec.Env))
88 for k, v := range e.spec.Env {
89 env = append(env, "SINGULARITYENV_"+k+"="+v)
92 path, err := exec.LookPath(args[0])
101 Stdout: e.spec.Stdout,
102 Stderr: e.spec.Stderr,
112 func (e *singularityExecutor) CgroupID() string {
116 func (e *singularityExecutor) Stop() error {
117 if err := e.child.Process.Signal(syscall.Signal(0)); err != nil {
118 // process already exited
121 return e.child.Process.Signal(syscall.SIGKILL)
124 func (e *singularityExecutor) Wait(context.Context) (int, error) {
125 err := e.child.Wait()
126 if err, ok := err.(*exec.ExitError); ok {
127 return err.ProcessState.ExitCode(), nil
132 return e.child.ProcessState.ExitCode(), nil
135 func (e *singularityExecutor) Close() {
136 err := os.RemoveAll(e.tmpdir)
138 e.logf("error removing temp dir: %s", err)