mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-23 00:38:26 +00:00
247 lines
6.9 KiB
Go
247 lines
6.9 KiB
Go
package main
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import (
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"bytes"
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"encoding/json"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"testing"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/modifier"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/test"
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"github.com/opencontainers/runtime-spec/specs-go"
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"github.com/stretchr/testify/require"
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)
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const (
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nvidiaRuntime = "nvidia-container-runtime"
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nvidiaHook = "nvidia-container-runtime-hook"
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bundlePathSuffix = "test/output/bundle/"
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specFile = "config.json"
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unmodifiedSpecFileSuffix = "test/input/test_spec.json"
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)
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const (
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runcExecutableName = "runc"
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)
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type testConfig struct {
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root string
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binPath string
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}
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var cfg *testConfig
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func TestMain(m *testing.M) {
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// TEST SETUP
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// Determine the module root and the test binary path
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var err error
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moduleRoot, err := test.GetModuleRoot()
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if err != nil {
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logger.Fatalf("error in test setup: could not get module root: %v", err)
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}
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testBinPath := filepath.Join(moduleRoot, "test", "bin")
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testInputPath := filepath.Join(moduleRoot, "test", "input")
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// Set the environment variables for the test
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os.Setenv("PATH", test.PrependToPath(testBinPath, moduleRoot))
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os.Setenv("XDG_CONFIG_HOME", testInputPath)
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// Confirm that the environment is configured correctly
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runcPath, err := exec.LookPath(runcExecutableName)
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if err != nil || filepath.Join(testBinPath, runcExecutableName) != runcPath {
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logger.Fatalf("error in test setup: mock runc path set incorrectly in TestMain(): %v", err)
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}
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hookPath, err := exec.LookPath(nvidiaHook)
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if err != nil || filepath.Join(testBinPath, nvidiaHook) != hookPath {
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logger.Fatalf("error in test setup: mock hook path set incorrectly in TestMain(): %v", err)
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}
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// Store the root and binary paths in the test Config
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cfg = &testConfig{
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root: moduleRoot,
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binPath: testBinPath,
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}
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// RUN TESTS
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exitCode := m.Run()
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// TEST CLEANUP
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os.Remove(specFile)
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os.Exit(exitCode)
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}
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// case 1) nvidia-container-runtime run --bundle
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// case 2) nvidia-container-runtime create --bundle
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// - Confirm the runtime handles bad input correctly
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func TestBadInput(t *testing.T) {
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err := cfg.generateNewRuntimeSpec()
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if err != nil {
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t.Fatal(err)
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}
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cmdCreate := exec.Command(nvidiaRuntime, "create", "--bundle")
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t.Logf("executing: %s\n", strings.Join(cmdCreate.Args, " "))
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err = cmdCreate.Run()
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require.Error(t, err, "runtime should return an error")
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}
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// case 1) nvidia-container-runtime run --bundle <bundle-name> <ctr-name>
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// - Confirm the runtime runs with no errors
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// case 2) nvidia-container-runtime create --bundle <bundle-name> <ctr-name>
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// - Confirm the runtime inserts the NVIDIA prestart hook correctly
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func TestGoodInput(t *testing.T) {
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err := cfg.generateNewRuntimeSpec()
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if err != nil {
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t.Fatalf("error generating runtime spec: %v", err)
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}
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cmdRun := exec.Command(nvidiaRuntime, "run", "--bundle", cfg.bundlePath(), "testcontainer")
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t.Logf("executing: %s\n", strings.Join(cmdRun.Args, " "))
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output, err := cmdRun.CombinedOutput()
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require.NoErrorf(t, err, "runtime should not return an error", "output=%v", string(output))
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// Check config.json and confirm there are no hooks
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spec, err := cfg.getRuntimeSpec()
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require.NoError(t, err, "should be no errors when reading and parsing spec from config.json")
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require.Empty(t, spec.Hooks, "there should be no hooks in config.json")
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cmdCreate := exec.Command(nvidiaRuntime, "create", "--bundle", cfg.bundlePath(), "testcontainer")
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t.Logf("executing: %s\n", strings.Join(cmdCreate.Args, " "))
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err = cmdCreate.Run()
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require.NoError(t, err, "runtime should not return an error")
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// Check config.json for NVIDIA prestart hook
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spec, err = cfg.getRuntimeSpec()
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require.NoError(t, err, "should be no errors when reading and parsing spec from config.json")
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require.NotEmpty(t, spec.Hooks, "there should be hooks in config.json")
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require.Equal(t, 1, nvidiaHookCount(spec.Hooks), "exactly one nvidia prestart hook should be inserted correctly into config.json")
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}
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// NVIDIA prestart hook already present in config file
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func TestDuplicateHook(t *testing.T) {
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err := cfg.generateNewRuntimeSpec()
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if err != nil {
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t.Fatal(err)
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}
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var spec specs.Spec
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spec, err = cfg.getRuntimeSpec()
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if err != nil {
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t.Fatal(err)
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}
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t.Logf("inserting nvidia prestart hook to config.json")
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if err = addNVIDIAHook(&spec); err != nil {
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t.Fatal(err)
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}
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jsonOutput, err := json.MarshalIndent(spec, "", "\t")
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if err != nil {
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t.Fatal(err)
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}
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jsonFile, err := os.OpenFile(cfg.specFilePath(), os.O_RDWR, 0644)
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if err != nil {
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t.Fatal(err)
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}
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_, err = jsonFile.WriteAt(jsonOutput, 0)
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if err != nil {
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t.Fatal(err)
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}
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// Test how runtime handles already existing prestart hook in config.json
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cmdCreate := exec.Command(nvidiaRuntime, "create", "--bundle", cfg.bundlePath(), "testcontainer")
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t.Logf("executing: %s\n", strings.Join(cmdCreate.Args, " "))
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output, err := cmdCreate.CombinedOutput()
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require.NoErrorf(t, err, "runtime should not return an error", "output=%v", string(output))
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// Check config.json for NVIDIA prestart hook
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spec, err = cfg.getRuntimeSpec()
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require.NoError(t, err, "should be no errors when reading and parsing spec from config.json")
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require.NotEmpty(t, spec.Hooks, "there should be hooks in config.json")
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require.Equal(t, 1, nvidiaHookCount(spec.Hooks), "exactly one nvidia prestart hook should be inserted correctly into config.json")
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}
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// addNVIDIAHook is a basic wrapper for an addHookModifier that is used for
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// testing.
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func addNVIDIAHook(spec *specs.Spec) error {
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m := modifier.NewStableRuntimeModifier(logger.Logger)
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return m.Modify(spec)
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}
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func (c testConfig) getRuntimeSpec() (specs.Spec, error) {
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filePath := c.specFilePath()
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var spec specs.Spec
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jsonFile, err := os.OpenFile(filePath, os.O_RDWR, 0644)
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if err != nil {
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return spec, err
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}
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defer jsonFile.Close()
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jsonContent, err := ioutil.ReadAll(jsonFile)
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if err != nil {
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return spec, err
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} else if json.Valid(jsonContent) {
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err = json.Unmarshal(jsonContent, &spec)
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if err != nil {
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return spec, err
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}
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} else {
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err = json.NewDecoder(bytes.NewReader(jsonContent)).Decode(&spec)
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if err != nil {
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return spec, err
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}
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}
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return spec, err
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}
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func (c testConfig) bundlePath() string {
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return filepath.Join(c.root, bundlePathSuffix)
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}
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func (c testConfig) specFilePath() string {
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return filepath.Join(c.bundlePath(), specFile)
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}
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func (c testConfig) unmodifiedSpecFile() string {
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return filepath.Join(c.root, unmodifiedSpecFileSuffix)
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}
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func (c testConfig) generateNewRuntimeSpec() error {
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var err error
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err = os.MkdirAll(c.bundlePath(), 0755)
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if err != nil {
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return err
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}
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cmd := exec.Command("cp", c.unmodifiedSpecFile(), c.specFilePath())
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err = cmd.Run()
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if err != nil {
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return err
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}
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return nil
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}
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// Return number of valid NVIDIA prestart hooks in runtime spec
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func nvidiaHookCount(hooks *specs.Hooks) int {
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if hooks == nil {
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return 0
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}
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count := 0
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for _, hook := range hooks.Prestart {
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if strings.Contains(hook.Path, nvidiaHook) {
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count++
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}
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}
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return count
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}
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