forked from cloudfoundry/bosh-bootloader
/
executor.go
360 lines (301 loc) · 8.82 KB
/
executor.go
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package terraform
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"regexp"
"strings"
"github.com/cloudfoundry/bosh-bootloader/fileio"
"github.com/cloudfoundry/bosh-bootloader/storage"
)
var redactedError = "Some output has been redacted, use `bbl latest-error` to see it or run again with --debug for additional debug output"
type Executor struct {
cli terraformCLI
bufferingCLI terraformCLI
stateStore stateStore
fs fs
debug bool
out io.Writer
}
type tfOutput struct {
Sensitive bool
Type string
Value interface{}
}
type terraformCLI interface {
Run(stdout io.Writer, workingDirectory string, args []string) error
RunWithEnv(stdout io.Writer, workingDirectory string, args []string, envs []string) error
}
type stateStore interface {
GetTerraformDir() (string, error)
GetVarsDir() (string, error)
}
type fs interface {
fileio.FileWriter
fileio.DirReader
fileio.Stater
}
func NewExecutor(cli terraformCLI, bufferingCLI terraformCLI, stateStore stateStore, fs fs, debug bool, out io.Writer) Executor {
return Executor{
cli: cli,
bufferingCLI: bufferingCLI,
stateStore: stateStore,
fs: fs,
debug: debug,
out: out,
}
}
func (e Executor) Setup(template string, input map[string]interface{}) error {
terraformDir, err := e.stateStore.GetTerraformDir()
if err != nil {
return err
}
err = e.fs.WriteFile(filepath.Join(terraformDir, "bbl-template.tf"), []byte(template), storage.StateMode)
if err != nil {
return fmt.Errorf("Write terraform template: %s", err)
}
varsDir, err := e.stateStore.GetVarsDir()
if err != nil {
return err
}
err = os.MkdirAll(filepath.Join(terraformDir, ".terraform"), os.ModePerm)
if err != nil {
return fmt.Errorf("Create .terraform directory: %s", err)
}
err = e.fs.WriteFile(filepath.Join(terraformDir, ".terraform", ".gitignore"), []byte("*\n"), storage.StateMode)
if err != nil {
return fmt.Errorf("Write .gitignore for terraform binaries: %s", err)
}
err = e.fs.WriteFile(filepath.Join(varsDir, "bbl.tfvars"), []byte(formatVars(input)), storage.StateMode)
if err != nil {
return fmt.Errorf("Write terraform vars: %s", err)
}
return nil
}
func formatVars(inputs map[string]interface{}) string {
formattedVars := ""
for name, value := range inputs {
if vString, ok := value.(string); ok {
vString = fmt.Sprintf(`"%s"`, vString)
if strings.Contains(vString, "\n") {
vString = strings.Replace(vString, "\n", "\\n", -1)
}
value = vString
} else if valList, ok := value.([]string); ok {
value = fmt.Sprintf(`["%s"]`, strings.Join(valList, `","`))
}
formattedVars = fmt.Sprintf("%s\n%s=%s", formattedVars, name, value)
}
return formattedVars
}
func (e Executor) runTFCommand(args []string) error {
return e.runTFCommandWithEnvs(args, []string{})
}
func (e Executor) runTFCommandWithEnvs(args, envs []string) error {
varsDir, err := e.stateStore.GetVarsDir()
if err != nil {
return err
}
tfStatePath := filepath.Join(varsDir, "terraform.tfstate")
terraformDir, err := e.stateStore.GetTerraformDir()
if err != nil {
return err
}
relativeStatePath, err := filepath.Rel(terraformDir, tfStatePath)
if err != nil {
return fmt.Errorf("Get relative terraform state path: %s", err) //not tested
}
args = append(args,
"-state", relativeStatePath,
)
varsFiles, err := e.fs.ReadDir(varsDir)
if err != nil {
return fmt.Errorf("Read contents of vars directory: %s", err)
}
for _, file := range varsFiles {
if strings.HasSuffix(file.Name(), ".tfvars") {
relativeFilePath, err := filepath.Rel(terraformDir, filepath.Join(varsDir, file.Name()))
if err != nil {
return fmt.Errorf("Get relative terraform vars path: %s", err) //not tested
}
args = append(args,
"-var-file", relativeFilePath,
)
}
}
err = e.cli.RunWithEnv(e.out, terraformDir, args, envs)
if err != nil {
if e.debug {
return err
}
return fmt.Errorf(redactedError)
}
return nil
}
func (e Executor) Init() error {
terraformDir, err := e.stateStore.GetTerraformDir()
if err != nil {
return err
}
err = e.cli.Run(e.out, terraformDir, []string{"init", "--upgrade"})
if err != nil {
return fmt.Errorf("Run terraform init --upgrade: %s", err)
}
return nil
}
func (e Executor) Apply(credentials map[string]string) error {
args := []string{"apply", "--auto-approve"}
for key, value := range credentials {
arg := fmt.Sprintf("%s=%s", key, value)
args = append(args, "-var", arg)
}
return e.runTFCommand(args)
}
func (e Executor) Validate(credentials map[string]string) error {
args := []string{"validate"}
for key, value := range credentials {
arg := fmt.Sprintf("%s=%s", key, value)
args = append(args, "-var", arg)
}
varsDir, err := e.stateStore.GetVarsDir()
if err != nil {
return err
}
terraformDir, err := e.stateStore.GetTerraformDir()
if err != nil {
return err
}
varsFiles, err := e.fs.ReadDir(varsDir)
if err != nil {
return fmt.Errorf("Read contents of vars directory: %s", err)
}
for _, file := range varsFiles {
if strings.HasSuffix(file.Name(), ".tfvars") {
relativeFilePath, err := filepath.Rel(terraformDir, filepath.Join(varsDir, file.Name()))
if err != nil {
return fmt.Errorf("Get relative terraform vars path: %s", err) //not tested
}
args = append(args,
"-var-file", relativeFilePath,
)
}
}
err = e.cli.RunWithEnv(e.out, terraformDir, args, []string{})
if err != nil {
if e.debug {
return err
}
return fmt.Errorf(redactedError)
}
return nil
}
func (e Executor) Destroy(credentials map[string]string) error {
args := []string{"destroy", "-force"}
for key, value := range credentials {
arg := fmt.Sprintf("%s=%s", key, value)
args = append(args, "-var", arg)
}
return e.runTFCommandWithEnvs(args, []string{"TF_WARN_OUTPUT_ERRORS=1"})
}
func (e Executor) Version() (string, error) {
buffer := bytes.NewBuffer([]byte{})
err := e.bufferingCLI.Run(buffer, "/tmp", []string{"version"})
if err != nil {
return "", err
}
versionOutput := buffer.String()
regex := regexp.MustCompile(`\d+.\d+.\d+`)
version := regex.FindString(versionOutput)
if version == "" {
return "", errors.New("Terraform version could not be parsed")
}
return version, nil
}
func (e Executor) Output(outputName string) (string, error) {
terraformDir, err := e.stateStore.GetTerraformDir()
if err != nil {
return "", err
}
varsDir, err := e.stateStore.GetVarsDir()
if err != nil {
return "", err
}
err = e.cli.Run(e.out, terraformDir, []string{"init"})
if err != nil {
return "", fmt.Errorf("Run terraform init in terraform dir: %s", err)
}
args := []string{"output", outputName}
_, err = e.fs.Stat(filepath.Join(varsDir, "terraform.tfstate"))
if err == nil {
args = append(args, "-state", filepath.Join(varsDir, "terraform.tfstate"))
}
buffer := bytes.NewBuffer([]byte{})
err = e.bufferingCLI.Run(buffer, terraformDir, args)
if err != nil {
return "", fmt.Errorf("Run terraform output -state: %s", err)
}
return strings.TrimSuffix(buffer.String(), "\n"), nil
}
func (e Executor) Outputs() (map[string]interface{}, error) {
terraformDir, err := e.stateStore.GetTerraformDir()
if err != nil {
return map[string]interface{}{}, err
}
varsDir, err := e.stateStore.GetVarsDir()
if err != nil {
return map[string]interface{}{}, err
}
buffer := bytes.NewBuffer([]byte{})
args := []string{"output", "--json"}
_, err = e.fs.Stat(filepath.Join(varsDir, "terraform.tfstate"))
if err == nil {
args = append(args, "-state", filepath.Join(varsDir, "terraform.tfstate"))
}
err = e.bufferingCLI.Run(buffer, terraformDir, args)
if err != nil {
return map[string]interface{}{}, fmt.Errorf("Run terraform output --json in vars dir: %s", err)
}
tfOutputs := map[string]tfOutput{}
err = json.Unmarshal(buffer.Bytes(), &tfOutputs)
if err != nil {
return map[string]interface{}{}, fmt.Errorf("Unmarshal terraform output: %s", err)
}
outputs := map[string]interface{}{}
for tfKey, tfValue := range tfOutputs {
outputs[tfKey] = tfValue.Value
}
return outputs, nil
}
func (e Executor) IsPaved() (bool, error) {
terraformDir, err := e.stateStore.GetTerraformDir()
if err != nil {
return false, err
}
err = e.cli.Run(ioutil.Discard, terraformDir, []string{"init"})
if err != nil {
return false, fmt.Errorf("Run terraform init in terraform dir: %s", err)
}
varsDir, err := e.stateStore.GetVarsDir()
if err != nil {
return false, err
}
buffer := bytes.NewBuffer([]byte{})
args := []string{"show"}
_, err = e.fs.Stat(filepath.Join(varsDir, "terraform.tfstate"))
if err == nil {
args = append(args, filepath.Join(varsDir, "terraform.tfstate"))
}
err = e.bufferingCLI.Run(buffer, terraformDir, args)
if err != nil {
return false, fmt.Errorf("Run terraform show: %s", err)
}
if strings.TrimSpace(string(buffer.Bytes())) == "No state." {
return false, nil
}
return true, nil
}