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util.go
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util.go
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package tftest
import (
"bytes"
"fmt"
"math"
"math/rand"
"os"
"path/filepath"
"strings"
"testing"
"time"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/aws/aws-sdk-go/service/iam"
"github.com/aws/aws-sdk-go/service/sts"
"github.com/gruntwork-io/terratest/modules/aws"
"github.com/gruntwork-io/terratest/modules/random"
"github.com/gruntwork-io/terratest/modules/terraform"
"github.com/stretchr/testify/assert"
)
const (
// IAMRegion IAM is allegedly hosted in us-east-1, so use this region for IAM related things
IAMRegion = "us-east-1"
DefaultRegion = "us-west-2"
)
func AWSCurrentAccountID(t *testing.T) string {
session, err := aws.NewAuthenticatedSession(IAMRegion)
assert.Nil(t, err)
stsClient := sts.New(session)
caller, err := stsClient.GetCallerIdentity(&sts.GetCallerIdentityInput{})
assert.Nil(t, err)
curAcct := *caller.Account
assert.NotNil(t, curAcct)
return curAcct
}
// CreateRole will create a new role with a random name and path and return the name.
func CreateRole(t *testing.T) string {
a := assert.New(t)
currAcct := AWSCurrentAccountID(t)
roleName := random.UniqueId()
assumeRoleDocument := `{
"Version": "2012-10-17",
"Statement": {
"Effect": "Allow",
"Principal": {
"AWS": "arn:aws:iam::%s:root"
},
"Action": "sts:AssumeRole"
}
}`
iamClient := aws.NewIamClient(t, IAMRegion)
policy := fmt.Sprintf(assumeRoleDocument, currAcct)
_, err := iamClient.CreateRole(&iam.CreateRoleInput{
RoleName: &roleName,
AssumeRolePolicyDocument: &policy,
})
a.Nil(err)
_, err = iamClient.GetRole(&iam.GetRoleInput{RoleName: &roleName})
a.Nil(err)
return roleName
}
func CreateSecurityGroup(t *testing.T, region, vpc string) string {
name := UniqueID()
ec2Client := aws.NewEc2Client(t, region)
desc := "cztack test"
input := &ec2.CreateSecurityGroupInput{
GroupName: &name,
VpcId: &vpc,
Description: &desc,
}
output, e := ec2Client.CreateSecurityGroup(input)
assert.NoError(t, e)
return *output.GroupId
}
func DeleteSecurityGroup(t *testing.T, region, id string) {
ec2Client := aws.NewEc2Client(t, region)
input := &ec2.DeleteSecurityGroupInput{
GroupId: &id,
}
_, e := ec2Client.DeleteSecurityGroup(input)
assert.Nil(t, e)
}
func DeleteRole(t *testing.T, name string) {
iamClient := aws.NewIamClient(t, IAMRegion)
iamClient.DeleteRole(&iam.DeleteRoleInput{RoleName: &name}) //nolint
}
// Destroy with retries
func Destroy(t *testing.T, options *terraform.Options, retries ...int) {
retryTimes := 3
if len(retries) == 1 {
retryTimes = retries[0]
}
var err error
var output string
for i := 0; i < retryTimes; i++ {
output, err = terraform.DestroyE(t, options)
if err == nil {
return // Done
}
fmt.Printf("Retrying delete %d time...\n", i)
fmt.Println(output)
sleep := math.Min(math.Pow(2, float64(i)), 5*60) // Sleep maximum of 5 minutes
time.Sleep(time.Duration(sleep) * time.Second)
}
// err should not be nil by this point
t.Fatal(err)
}
func Run(t *testing.T, options *terraform.Options) {
Clean(options.TerraformDir)
terraform.InitAndApply(t, options)
}
func Clean(dir string) {
os.Remove(filepath.Join(dir, "terraform.tfstate"))
os.Remove(filepath.Join(dir, "terraform.tfstate.backup"))
}
func Cleanup(t *testing.T, options *terraform.Options) {
terraform.Destroy(t, options)
Clean(options.TerraformDir)
}
func ListEnvVar(name string) []string {
s := os.Getenv(name)
splitFn := func(c rune) bool {
return c == ','
}
return strings.FieldsFunc(s, splitFn)
}
func EnvVar(name string) string {
return os.Getenv(name)
}
func Options(region string, vars map[string]interface{}) *terraform.Options {
standardOptions := []string{"project", "env", "service", "owner"}
for _, o := range standardOptions {
if _, present := vars[o]; !present {
vars[o] = UniqueID()
}
}
return &terraform.Options{
TerraformDir: ".",
EnvVars: map[string]string{
"AWS_DEFAULT_REGION": region,
},
Vars: vars,
}
}
// Lifted from https://github.com/gruntwork-io/terratest/blob/master/modules/random/random.go and modified
// to do lowercase only.
// TODO fork terratest and write a method for random strings that takes a list of acceptable characters.
const base62chars = "abcdefghijklmnopqrstuvwxyz"
const AlphaNum = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
const Alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
const uniqueIDLength = 6 // Should be good for 62^6 = 56+ billion combinations
// UniqueId returns a unique (ish) id we can attach to resources and tfstate files so they don't conflict with each other
// Uses base 62 to generate a 6 character string that's unlikely to collide with the handful of tests we run in
// parallel. Based on code here: http://stackoverflow.com/a/9543797/483528
func UniqueID() string {
return RandomString(base62chars, uniqueIDLength)
}
// newRand creates a new random number generator, seeding it with the current system time.
func newRand() *rand.Rand {
return rand.New(rand.NewSource(time.Now().UnixNano())) //nolint
}
func RandomString(chars string, length int) string {
var out bytes.Buffer
generator := newRand()
for i := 0; i < length; i++ {
out.WriteByte(chars[generator.Intn(len(chars))])
}
return out.String()
}
func Strptr(in string) *string {
return &in
}
func Boolptr(in bool) *bool {
return &in
}
func Int64ptr(in int64) *int64 {
return &in
}