packer-cn/builder/docker/communicator_test.go

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package docker
import (
"crypto/sha256"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"os/exec"
"testing"
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builderT "github.com/hashicorp/packer-plugin-sdk/acctest"
packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
)
// RenderConfig helps create dynamic packer template configs for parsing by
// builderT without having to write the config to a file.
func RenderConfig(builderConfig map[string]interface{}, provisionerConfig []map[string]interface{}) string {
// set up basic build template
t := map[string][]map[string]interface{}{
"builders": {
// Setup basic docker config
map[string]interface{}{
"type": "test",
"image": "ubuntu",
"discard": true,
},
},
"provisioners": []map[string]interface{}{},
}
// apply special builder overrides
for k, v := range builderConfig {
t["builders"][0][k] = v
}
// Apply special provisioner overrides
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t["provisioners"] = append(t["provisioners"], provisionerConfig...)
j, _ := json.Marshal(t)
return string(j)
}
// TestUploadDownload verifies that basic upload / download functionality works
func TestUploadDownload(t *testing.T) {
if os.Getenv("PACKER_ACC") == "" {
t.Skip("This test is only run with PACKER_ACC=1")
}
dockerBuilderExtraConfig := map[string]interface{}{
"run_command": []string{"-d", "-i", "-t", "{{.Image}}", "/bin/sh"},
}
dockerProvisionerConfig := []map[string]interface{}{
{
"type": "file",
"source": "test-fixtures/onecakes/strawberry",
"destination": "/strawberry-cake",
},
{
"type": "file",
"source": "/strawberry-cake",
"destination": "my-strawberry-cake",
"direction": "download",
},
}
configString := RenderConfig(dockerBuilderExtraConfig, dockerProvisionerConfig)
// this should be a precheck
cmd := exec.Command("docker", "-v")
err := cmd.Run()
if err != nil {
t.Error("docker command not found; please make sure docker is installed")
}
builderT.Test(t, builderT.TestCase{
Builder: &Builder{},
Template: configString,
Check: func(a []packersdk.Artifact) error {
// Verify that the thing we downloaded is the same thing we sent up.
// Complain loudly if it isn't.
inputFile, err := ioutil.ReadFile("test-fixtures/onecakes/strawberry")
if err != nil {
return fmt.Errorf("Unable to read input file: %s", err)
}
outputFile, err := ioutil.ReadFile("my-strawberry-cake")
if err != nil {
return fmt.Errorf("Unable to read output file: %s", err)
}
if sha256.Sum256(inputFile) != sha256.Sum256(outputFile) {
return fmt.Errorf("Input and output files do not match\n"+
"Input:\n%s\nOutput:\n%s\n", inputFile, outputFile)
}
return nil
},
Teardown: func() error {
// Cleanup. Honestly I don't know why you would want to get rid
// of my strawberry cake. It's so tasty! Do you not like cake? Are you a
// cake-hater? Or are you keeping all the cake all for yourself? So selfish!
os.Remove("my-strawberry-cake")
return nil
},
})
}
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// TestLargeDownload verifies that files are the appropriate size after being
// downloaded. This is to identify and fix the race condition in #2793. You may
// need to use github.com/cbednarski/rerun to verify since this problem occurs
// only intermittently.
func TestLargeDownload(t *testing.T) {
if os.Getenv("PACKER_ACC") == "" {
t.Skip("This test is only run with PACKER_ACC=1")
}
dockerProvisionerConfig := []map[string]interface{}{
{
"type": "shell",
"inline": []string{
"dd if=/dev/urandom of=/tmp/cupcake bs=1M count=2",
"dd if=/dev/urandom of=/tmp/bigcake bs=1M count=100",
"sync",
"md5sum /tmp/cupcake /tmp/bigcake",
},
},
{
"type": "file",
"source": "/tmp/cupcake",
"destination": "cupcake",
"direction": "download",
},
{
"type": "file",
"source": "/tmp/bigcake",
"destination": "bigcake",
"direction": "download",
},
}
configString := RenderConfig(map[string]interface{}{}, dockerProvisionerConfig)
// this should be a precheck
cmd := exec.Command("docker", "-v")
err := cmd.Run()
if err != nil {
t.Error("docker command not found; please make sure docker is installed")
}
builderT.Test(t, builderT.TestCase{
Builder: &Builder{},
Template: configString,
Check: func(a []packersdk.Artifact) error {
// Verify that the things we downloaded are the right size. Complain loudly
// if they are not.
//
// cupcake should be 2097152 bytes
// bigcake should be 104857600 bytes
cupcake, err := os.Stat("cupcake")
if err != nil {
t.Fatalf("Unable to stat cupcake file: %s", err)
}
cupcakeExpected := int64(2097152)
if cupcake.Size() != cupcakeExpected {
t.Errorf("Expected cupcake to be %d bytes; found %d", cupcakeExpected, cupcake.Size())
}
bigcake, err := os.Stat("bigcake")
if err != nil {
t.Fatalf("Unable to stat bigcake file: %s", err)
}
bigcakeExpected := int64(104857600)
if bigcake.Size() != bigcakeExpected {
t.Errorf("Expected bigcake to be %d bytes; found %d", bigcakeExpected, bigcake.Size())
}
// TODO if we can, calculate a sha inside the container and compare to the
// one we get after we pull it down. We will probably have to parse the log
// or ui output to do this because we use /dev/urandom to create the file.
// if sha256.Sum256(inputFile) != sha256.Sum256(outputFile) {
// t.Fatalf("Input and output files do not match\n"+
// "Input:\n%s\nOutput:\n%s\n", inputFile, outputFile)
// }
return nil
},
Teardown: func() error {
os.Remove("cupcake")
os.Remove("bigcake")
return nil
},
})
}
// TestFixUploadOwner verifies that owner of uploaded files is the user the container is running as.
func TestFixUploadOwner(t *testing.T) {
if os.Getenv("PACKER_ACC") == "" {
t.Skip("This test is only run with PACKER_ACC=1")
}
cmd := exec.Command("docker", "-v")
err := cmd.Run()
if err != nil {
t.Error("docker command not found; please make sure docker is installed")
}
dockerBuilderExtraConfig := map[string]interface{}{
"run_command": []string{"-d", "-i", "-t", "-u", "42", "{{.Image}}", "/bin/sh"},
}
testFixUploadOwnerProvisionersTemplate := []map[string]interface{}{
{
"type": "file",
"source": "test-fixtures/onecakes/strawberry",
"destination": "/tmp/strawberry-cake",
},
{
"type": "file",
"source": "test-fixtures/manycakes",
"destination": "/tmp/",
},
{
"type": "shell",
"inline": "touch /tmp/testUploadOwner",
},
{
"type": "shell",
"inline": []string{
"[ $(stat -c %u /tmp/strawberry-cake) -eq 42 ] || (echo 'Invalid owner of /tmp/strawberry-cake' && exit 1)",
"[ $(stat -c %u /tmp/testUploadOwner) -eq 42 ] || (echo 'Invalid owner of /tmp/testUploadOwner' && exit 1)",
"find /tmp/manycakes | xargs -n1 -IFILE /bin/sh -c '[ $(stat -c %u FILE) -eq 42 ] || (echo \"Invalid owner of FILE\" && exit 1)'",
},
},
}
configString := RenderConfig(dockerBuilderExtraConfig, testFixUploadOwnerProvisionersTemplate)
builderT.Test(t, builderT.TestCase{
Builder: &Builder{},
Template: configString,
})
}