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generate.go
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generate.go
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package kubernetes
import (
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"os/exec"
"path"
"path/filepath"
"regexp"
"sync"
"github.com/commitdev/commit0/internal/config"
"github.com/commitdev/commit0/internal/templator"
"github.com/commitdev/commit0/internal/util"
"github.com/manifoldco/promptui"
"gopkg.in/yaml.v2"
)
// Secrets - AWS prompted credentials
type Secrets struct {
Aws struct {
AwsAccessKeyID string
AwsSecretAccessKey string
Region string
}
}
// Generate templates
func Generate(t *templator.Templator, cfg *config.Commit0Config, wg *sync.WaitGroup, pathPrefix string) {
data := templator.GenericTemplateData{*cfg}
t.Kubernetes.TemplateFiles(data, false, wg, pathPrefix)
}
// Execute terrafrom init & plan
func Execute(config *config.Commit0Config, pathPrefix string) {
if config.Infrastructure.AWS.EKS.Deploy {
log.Println("Preparing aws environment...")
dir := util.GetCwd()
if fileExists(fmt.Sprintf("%s/secrets.yaml", dir)) {
log.Println("secrets.yaml exists ...")
} else {
awsSecrets := promptCredentials()
writeSecrets(awsSecrets)
}
envars := getAwsEnvars(readSecrets())
log.Println("Planning infrastructure...")
execute(exec.Command("terraform", "init"), pathPrefix, envars)
execute(exec.Command("terraform", "plan"), pathPrefix, envars)
}
}
func execute(cmd *exec.Cmd, pathPrefix string, envars []string) {
dir := util.GetCwd()
kubDir := path.Join(pathPrefix, "kubernetes/terraform/environments/staging")
cmd.Dir = path.Join(dir, kubDir)
stdoutPipe, _ := cmd.StdoutPipe()
stderrPipe, _ := cmd.StderrPipe()
var errStdout, errStderr error
if envars != nil {
cmd.Env = envars
}
err := cmd.Start()
if err != nil {
log.Fatalf("Starting terraform command failed: %v\n", err)
}
go func() {
_, errStdout = io.Copy(os.Stdout, stdoutPipe)
}()
go func() {
_, errStderr = io.Copy(os.Stderr, stderrPipe)
}()
err = cmd.Wait()
if err != nil {
log.Fatalf("Executing terraform command failed: %v\n", err)
}
if errStdout != nil {
log.Printf("Failed to capture stdout: %v\n", errStdout)
}
if errStderr != nil {
log.Printf("Failed to capture stderr: %v\n", errStderr)
}
}
func getAwsEnvars(awsSecrets Secrets) []string {
env := os.Environ()
env = append(env, fmt.Sprintf("AWS_ACCESS_KEY_ID=%s", awsSecrets.Aws.AwsAccessKeyID))
env = append(env, fmt.Sprintf("AWS_SECRET_ACCESS_KEY=%s", awsSecrets.Aws.AwsSecretAccessKey))
env = append(env, fmt.Sprintf("AWS_DEFAULT_REGION=%s", awsSecrets.Aws.Region))
return env
}
func readSecrets() Secrets {
dir := util.GetCwd()
secretsFile := fmt.Sprintf("%s/secrets.yaml", dir)
data, err := ioutil.ReadFile(secretsFile)
if err != nil {
log.Fatalln(err)
}
awsSecrets := Secrets{}
err = yaml.Unmarshal(data, &awsSecrets)
if err != nil {
log.Fatalln(err)
}
return awsSecrets
}
func writeSecrets(s Secrets) {
secretsYaml, err := yaml.Marshal(&s)
if err != nil {
log.Fatalf("error: %v", err)
panic(err)
}
dir := util.GetCwd()
if err != nil {
log.Fatalf("Getting working directory failed: %v\n", err)
panic(err)
}
secretsFile := filepath.Join(dir, "secrets.yaml")
err = ioutil.WriteFile(secretsFile, []byte(secretsYaml), 0644)
if err != nil {
log.Fatalf("error: %v", err)
panic(err)
}
}
func promptCredentials() Secrets {
validateAKID := func(input string) error {
// 20 uppercase alphanumeric characters
var awsAccessKeyIDPat = regexp.MustCompile(`^[A-Z0-9]{20}$`)
if !awsAccessKeyIDPat.MatchString(input) {
return errors.New("Invalid aws_access_key_id")
}
return nil
}
validateSAK := func(input string) error {
// 40 base64 characters
var awsSecretAccessKeyPat = regexp.MustCompile(`^[A-Za-z0-9/+=]{40}$`)
if !awsSecretAccessKeyPat.MatchString(input) {
return errors.New("Invalid aws_secret_access_key")
}
return nil
}
accessKeyIDPrompt := promptui.Prompt{
Label: "Aws Access Key ID ",
Validate: validateAKID,
}
accessKeyIDResult, err := accessKeyIDPrompt.Run()
if err != nil {
log.Fatalf("Prompt failed %v\n", err)
panic(err)
}
secretAccessKeyPrompt := promptui.Prompt{
Label: "Aws Secret Access Key ",
Validate: validateSAK,
Mask: '*',
}
secretAccessKeyResult, err := secretAccessKeyPrompt.Run()
if err != nil {
log.Fatalf("Prompt failed %v\n", err)
panic(err)
}
regionPrompt := promptui.Select{
Label: "Select AWS Region ",
Items: []string{"us-west-1", "us-west-2", "us-east-1", "us-east-2", "ca-central-1",
"eu-central-1", "eu-west-1", "ap-east-1", "ap-south-1"},
}
_, regionResult, err := regionPrompt.Run()
if err != nil {
log.Fatalf("Prompt failed %v\n", err)
panic(err)
}
awsSecrets := Secrets{}
awsSecrets.Aws.AwsAccessKeyID = accessKeyIDResult
awsSecrets.Aws.AwsSecretAccessKey = secretAccessKeyResult
awsSecrets.Aws.Region = regionResult
return awsSecrets
}
func fileExists(filename string) bool {
info, err := os.Stat(filename)
if os.IsNotExist(err) {
return false
}
return !info.IsDir()
}