399 lines
11 KiB
Go
399 lines
11 KiB
Go
package aws
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import (
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"fmt"
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"io/ioutil"
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"log"
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"time"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/aws/awserr"
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"github.com/aws/aws-sdk-go/service/lambda"
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"github.com/mitchellh/go-homedir"
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"errors"
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"github.com/hashicorp/terraform/helper/resource"
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"github.com/hashicorp/terraform/helper/schema"
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)
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func resourceAwsLambdaFunction() *schema.Resource {
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return &schema.Resource{
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Create: resourceAwsLambdaFunctionCreate,
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Read: resourceAwsLambdaFunctionRead,
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Update: resourceAwsLambdaFunctionUpdate,
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Delete: resourceAwsLambdaFunctionDelete,
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Schema: map[string]*schema.Schema{
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"filename": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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ConflictsWith: []string{"s3_bucket", "s3_key", "s3_object_version"},
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},
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"s3_bucket": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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ConflictsWith: []string{"filename"},
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},
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"s3_key": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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ConflictsWith: []string{"filename"},
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},
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"s3_object_version": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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ConflictsWith: []string{"filename"},
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},
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"description": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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},
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"function_name": &schema.Schema{
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Type: schema.TypeString,
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Required: true,
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ForceNew: true,
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},
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"handler": &schema.Schema{
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Type: schema.TypeString,
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Required: true,
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},
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"memory_size": &schema.Schema{
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Type: schema.TypeInt,
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Optional: true,
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Default: 128,
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},
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"role": &schema.Schema{
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Type: schema.TypeString,
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Required: true,
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},
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"runtime": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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ForceNew: true,
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Default: "nodejs",
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},
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"timeout": &schema.Schema{
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Type: schema.TypeInt,
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Optional: true,
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Default: 3,
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},
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"vpc_config": &schema.Schema{
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Type: schema.TypeList,
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Optional: true,
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ForceNew: true,
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Elem: &schema.Resource{
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Schema: map[string]*schema.Schema{
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"subnet_ids": &schema.Schema{
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Type: schema.TypeSet,
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Required: true,
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ForceNew: true,
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Elem: &schema.Schema{Type: schema.TypeString},
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Set: schema.HashString,
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},
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"security_group_ids": &schema.Schema{
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Type: schema.TypeSet,
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Required: true,
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ForceNew: true,
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Elem: &schema.Schema{Type: schema.TypeString},
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Set: schema.HashString,
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},
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},
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},
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},
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"arn": &schema.Schema{
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Type: schema.TypeString,
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Computed: true,
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},
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"last_modified": &schema.Schema{
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Type: schema.TypeString,
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Computed: true,
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},
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"source_code_hash": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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Computed: true,
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},
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},
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}
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}
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// resourceAwsLambdaFunction maps to:
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// CreateFunction in the API / SDK
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func resourceAwsLambdaFunctionCreate(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).lambdaconn
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functionName := d.Get("function_name").(string)
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iamRole := d.Get("role").(string)
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log.Printf("[DEBUG] Creating Lambda Function %s with role %s", functionName, iamRole)
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var functionCode *lambda.FunctionCode
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if v, ok := d.GetOk("filename"); ok {
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file, err := loadFileContent(v.(string))
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if err != nil {
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return fmt.Errorf("Unable to load %q: %s", v.(string), err)
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}
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functionCode = &lambda.FunctionCode{
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ZipFile: file,
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}
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} else {
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s3Bucket, bucketOk := d.GetOk("s3_bucket")
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s3Key, keyOk := d.GetOk("s3_key")
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s3ObjectVersion, versionOk := d.GetOk("s3_object_version")
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if !bucketOk || !keyOk {
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return errors.New("s3_bucket and s3_key must all be set while using S3 code source")
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}
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functionCode = &lambda.FunctionCode{
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S3Bucket: aws.String(s3Bucket.(string)),
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S3Key: aws.String(s3Key.(string)),
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}
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if versionOk {
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functionCode.S3ObjectVersion = aws.String(s3ObjectVersion.(string))
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}
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}
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params := &lambda.CreateFunctionInput{
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Code: functionCode,
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Description: aws.String(d.Get("description").(string)),
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FunctionName: aws.String(functionName),
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Handler: aws.String(d.Get("handler").(string)),
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MemorySize: aws.Int64(int64(d.Get("memory_size").(int))),
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Role: aws.String(iamRole),
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Runtime: aws.String(d.Get("runtime").(string)),
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Timeout: aws.Int64(int64(d.Get("timeout").(int))),
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}
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if v, ok := d.GetOk("vpc_config"); ok {
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config, err := validateVPCConfig(v)
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if err != nil {
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return err
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}
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var subnetIds []*string
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for _, id := range config["subnet_ids"].(*schema.Set).List() {
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subnetIds = append(subnetIds, aws.String(id.(string)))
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}
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var securityGroupIds []*string
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for _, id := range config["security_group_ids"].(*schema.Set).List() {
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securityGroupIds = append(securityGroupIds, aws.String(id.(string)))
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}
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params.VpcConfig = &lambda.VpcConfig{
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SubnetIds: subnetIds,
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SecurityGroupIds: securityGroupIds,
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}
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}
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// IAM profiles can take ~10 seconds to propagate in AWS:
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// http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/iam-roles-for-amazon-ec2.html#launch-instance-with-role-console
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// Error creating Lambda function: InvalidParameterValueException: The role defined for the task cannot be assumed by Lambda.
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err := resource.Retry(1*time.Minute, func() *resource.RetryError {
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_, err := conn.CreateFunction(params)
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if err != nil {
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log.Printf("[ERROR] Received %q, retrying CreateFunction", err)
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if awserr, ok := err.(awserr.Error); ok {
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if awserr.Code() == "InvalidParameterValueException" {
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log.Printf("[DEBUG] InvalidParameterValueException creating Lambda Function: %s", awserr)
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return resource.RetryableError(awserr)
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}
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}
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log.Printf("[DEBUG] Error creating Lambda Function: %s", err)
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return resource.NonRetryableError(err)
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}
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return nil
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})
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if err != nil {
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return fmt.Errorf("Error creating Lambda function: %s", err)
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}
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d.SetId(d.Get("function_name").(string))
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return resourceAwsLambdaFunctionRead(d, meta)
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}
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// resourceAwsLambdaFunctionRead maps to:
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// GetFunction in the API / SDK
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func resourceAwsLambdaFunctionRead(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).lambdaconn
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log.Printf("[DEBUG] Fetching Lambda Function: %s", d.Id())
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params := &lambda.GetFunctionInput{
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FunctionName: aws.String(d.Get("function_name").(string)),
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}
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getFunctionOutput, err := conn.GetFunction(params)
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if err != nil {
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if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == "ResourceNotFoundException" {
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d.SetId("")
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return nil
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}
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return err
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}
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// getFunctionOutput.Code.Location is a pre-signed URL pointing at the zip
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// file that we uploaded when we created the resource. You can use it to
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// download the code from AWS. The other part is
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// getFunctionOutput.Configuration which holds metadata.
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function := getFunctionOutput.Configuration
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// TODO error checking / handling on the Set() calls.
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d.Set("arn", function.FunctionArn)
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d.Set("description", function.Description)
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d.Set("handler", function.Handler)
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d.Set("memory_size", function.MemorySize)
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d.Set("last_modified", function.LastModified)
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d.Set("role", function.Role)
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d.Set("runtime", function.Runtime)
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d.Set("timeout", function.Timeout)
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if config := flattenLambdaVpcConfigResponse(function.VpcConfig); len(config) > 0 {
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d.Set("vpc_config", config)
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}
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d.Set("source_code_hash", function.CodeSha256)
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return nil
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}
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// resourceAwsLambdaFunction maps to:
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// DeleteFunction in the API / SDK
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func resourceAwsLambdaFunctionDelete(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).lambdaconn
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log.Printf("[INFO] Deleting Lambda Function: %s", d.Id())
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params := &lambda.DeleteFunctionInput{
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FunctionName: aws.String(d.Get("function_name").(string)),
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}
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_, err := conn.DeleteFunction(params)
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if err != nil {
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return fmt.Errorf("Error deleting Lambda Function: %s", err)
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}
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d.SetId("")
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return nil
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}
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// resourceAwsLambdaFunctionUpdate maps to:
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// UpdateFunctionCode in the API / SDK
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func resourceAwsLambdaFunctionUpdate(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).lambdaconn
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d.Partial(true)
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codeReq := &lambda.UpdateFunctionCodeInput{
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FunctionName: aws.String(d.Id()),
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}
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codeUpdate := false
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if v, ok := d.GetOk("filename"); ok && d.HasChange("source_code_hash") {
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file, err := loadFileContent(v.(string))
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if err != nil {
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return fmt.Errorf("Unable to load %q: %s", v.(string), err)
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}
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codeReq.ZipFile = file
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codeUpdate = true
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}
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if d.HasChange("s3_bucket") || d.HasChange("s3_key") || d.HasChange("s3_object_version") {
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codeReq.S3Bucket = aws.String(d.Get("s3_bucket").(string))
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codeReq.S3Key = aws.String(d.Get("s3_key").(string))
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codeReq.S3ObjectVersion = aws.String(d.Get("s3_object_version").(string))
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codeUpdate = true
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}
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log.Printf("[DEBUG] Send Update Lambda Function Code request: %#v", codeReq)
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if codeUpdate {
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_, err := conn.UpdateFunctionCode(codeReq)
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if err != nil {
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return fmt.Errorf("Error modifying Lambda Function Code %s: %s", d.Id(), err)
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}
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d.SetPartial("filename")
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d.SetPartial("source_code_hash")
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d.SetPartial("s3_bucket")
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d.SetPartial("s3_key")
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d.SetPartial("s3_object_version")
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}
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configReq := &lambda.UpdateFunctionConfigurationInput{
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FunctionName: aws.String(d.Id()),
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}
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configUpdate := false
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if d.HasChange("description") {
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configReq.Description = aws.String(d.Get("description").(string))
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configUpdate = true
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}
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if d.HasChange("handler") {
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configReq.Handler = aws.String(d.Get("handler").(string))
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configUpdate = true
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}
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if d.HasChange("memory_size") {
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configReq.MemorySize = aws.Int64(int64(d.Get("memory_size").(int)))
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configUpdate = true
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}
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if d.HasChange("role") {
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configReq.Role = aws.String(d.Get("role").(string))
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configUpdate = true
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}
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if d.HasChange("timeout") {
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configReq.Timeout = aws.Int64(int64(d.Get("timeout").(int)))
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configUpdate = true
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}
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log.Printf("[DEBUG] Send Update Lambda Function Configuration request: %#v", configReq)
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if configUpdate {
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_, err := conn.UpdateFunctionConfiguration(configReq)
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if err != nil {
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return fmt.Errorf("Error modifying Lambda Function Configuration %s: %s", d.Id(), err)
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}
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d.SetPartial("description")
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d.SetPartial("handler")
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d.SetPartial("memory_size")
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d.SetPartial("role")
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d.SetPartial("timeout")
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}
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d.Partial(false)
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return resourceAwsLambdaFunctionRead(d, meta)
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}
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// loadFileContent returns contents of a file in a given path
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func loadFileContent(v string) ([]byte, error) {
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filename, err := homedir.Expand(v)
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if err != nil {
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return nil, err
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}
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fileContent, err := ioutil.ReadFile(filename)
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if err != nil {
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return nil, err
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}
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return fileContent, nil
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}
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func validateVPCConfig(v interface{}) (map[string]interface{}, error) {
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configs := v.([]interface{})
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if len(configs) > 1 {
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return nil, errors.New("Only a single vpc_config block is expected")
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}
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config, ok := configs[0].(map[string]interface{})
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if !ok {
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return nil, errors.New("vpc_config is <nil>")
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}
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if config["subnet_ids"].(*schema.Set).Len() == 0 {
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return nil, errors.New("vpc_config.subnet_ids cannot be empty")
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}
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if config["security_group_ids"].(*schema.Set).Len() == 0 {
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return nil, errors.New("vpc_config.security_group_ids cannot be empty")
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}
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return config, nil
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}
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