Add aws_ecs_container_definition data source
this datasource allows terraform to work with externally modified state, e.g. when you're using an ECS service which is continously updated by your CI via the AWS CLI. right now you'd have to wrap terraform into a shell script which looks up the current image digest, so running terraform won't change the updated service. using the aws_ecs_container_definition data source you can now leverage terraform, removing the wrapper entirely.
This commit is contained in:
Raphael Randschau
parent
fe540b408f
commit
90889632e0
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@ -0,0 +1,98 @@
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package aws
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import (
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"fmt"
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"strings"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/service/ecs"
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"github.com/hashicorp/terraform/helper/schema"
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)
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func dataSourceAwsEcsContainerDefinition() *schema.Resource {
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return &schema.Resource{
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Read: dataSourceAwsEcsContainerDefinitionRead,
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Schema: map[string]*schema.Schema{
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"task_definition": &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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"container_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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// Computed values.
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"image": &schema.Schema{
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Type: schema.TypeString,
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Computed: true,
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},
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"image_digest": &schema.Schema{
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Type: schema.TypeString,
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Computed: true,
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},
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"cpu": &schema.Schema{
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Type: schema.TypeInt,
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Computed: true,
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},
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"memory": &schema.Schema{
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Type: schema.TypeInt,
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Computed: true,
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},
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"disable_networking": &schema.Schema{
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Type: schema.TypeBool,
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Computed: true,
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},
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"docker_labels": &schema.Schema{
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Type: schema.TypeMap,
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Computed: true,
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Elem: schema.TypeString,
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},
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"environment": &schema.Schema{
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Type: schema.TypeMap,
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Computed: true,
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Elem: schema.TypeString,
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},
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},
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}
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}
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func dataSourceAwsEcsContainerDefinitionRead(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).ecsconn
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desc, err := conn.DescribeTaskDefinition(&ecs.DescribeTaskDefinitionInput{
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TaskDefinition: aws.String(d.Get("task_definition").(string)),
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})
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if err != nil {
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return err
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}
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taskDefinition := *desc.TaskDefinition
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for _, def := range taskDefinition.ContainerDefinitions {
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if aws.StringValue(def.Name) != d.Get("container_name").(string) {
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continue
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}
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d.SetId(fmt.Sprintf("%s/%s", aws.StringValue(taskDefinition.TaskDefinitionArn), d.Get("container_name").(string)))
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d.Set("image", aws.StringValue(def.Image))
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d.Set("image_digest", strings.Split(aws.StringValue(def.Image), ":")[1])
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d.Set("cpu", aws.Int64Value(def.Cpu))
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d.Set("memory", aws.Int64Value(def.Memory))
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d.Set("disable_networking", aws.BoolValue(def.DisableNetworking))
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d.Set("docker_labels", aws.StringValueMap(def.DockerLabels))
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var environment = map[string]string{}
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for _, keyValuePair := range def.Environment {
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environment[aws.StringValue(keyValuePair.Name)] = aws.StringValue(keyValuePair.Value)
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}
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d.Set("environment", environment)
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}
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if d.Id() == "" {
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return fmt.Errorf("container with name %q not found in task definition %q", d.Get("container_name").(string), d.Get("task_definition").(string))
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}
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return nil
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}
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@ -0,0 +1,62 @@
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package aws
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import (
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"testing"
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"github.com/hashicorp/terraform/helper/resource"
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)
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func TestAccAWSAmiDataSource_ecsContainerDefinition(t *testing.T) {
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resource.Test(t, resource.TestCase{
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PreCheck: func() { testAccPreCheck(t) },
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Providers: testAccProviders,
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Steps: []resource.TestStep{
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resource.TestStep{
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Config: testAccCheckAwsEcsContainerDefinitionDataSourceConfig,
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Check: resource.ComposeTestCheckFunc(
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resource.TestCheckResourceAttr("data.aws_ecs_container_definition.mongo", "image", "mongo:latest"),
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resource.TestCheckResourceAttr("data.aws_ecs_container_definition.mongo", "memory", "128"),
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resource.TestCheckResourceAttr("data.aws_ecs_container_definition.mongo", "cpu", "128"),
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resource.TestCheckResourceAttr("data.aws_ecs_container_definition.mongo", "environment.SECRET", "KEY"),
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),
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},
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},
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})
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}
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const testAccCheckAwsEcsContainerDefinitionDataSourceConfig = `
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resource "aws_ecs_cluster" "default" {
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name = "terraformecstest1"
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}
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resource "aws_ecs_task_definition" "mongo" {
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family = "mongodb"
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container_definitions = <<DEFINITION
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[
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{
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"cpu": 128,
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"environment": [{
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"name": "SECRET",
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"value": "KEY"
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}],
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"essential": true,
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"image": "mongo:latest",
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"memory": 128,
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"name": "mongodb"
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}
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]
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DEFINITION
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}
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resource "aws_ecs_service" "mongo" {
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name = "mongodb"
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cluster = "${aws_ecs_cluster.default.id}"
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task_definition = "${aws_ecs_task_definition.mongo.arn}"
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desired_count = 1
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}
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data "aws_ecs_container_definition" "mongo" {
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task_definition = "${aws_ecs_task_definition.mongo.id}"
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container_name = "mongodb"
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}
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`
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@ -111,10 +111,11 @@ func Provider() terraform.ResourceProvider {
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},
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DataSourcesMap: map[string]*schema.Resource{
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"aws_ami": dataSourceAwsAmi(),
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"aws_availability_zones": dataSourceAwsAvailabilityZones(),
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"aws_iam_policy_document": dataSourceAwsIamPolicyDocument(),
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"aws_s3_bucket_object": dataSourceAwsS3BucketObject(),
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"aws_ami": dataSourceAwsAmi(),
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"aws_availability_zones": dataSourceAwsAvailabilityZones(),
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"aws_iam_policy_document": dataSourceAwsIamPolicyDocument(),
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"aws_s3_bucket_object": dataSourceAwsS3BucketObject(),
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"aws_ecs_container_definition": dataSourceAwsEcsContainerDefinition(),
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},
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ResourcesMap: map[string]*schema.Resource{
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@ -0,0 +1,41 @@
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---
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layout: "aws"
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page_title: "AWS: aws_ecs_container_definition"
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sidebar_current: "docs-aws-datasource-ecs-container-definition"
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description: |-
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Provides details about a single container within an ecs task definition
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---
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# aws\_ecs\_container\_definition
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The Availability Zones data source allows access to the list of AWS
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Availability Zones which can be accessed by an AWS account within the region
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configured in the provider.
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## Example Usage
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```
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data "aws_ecs_container_definition" "ecs-mongo" {
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task_definition = "${aws_ecs_task_definition.mongo.id}"
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container_name = "mongodb"
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}
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```
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## Argument Reference
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The following arguments are supported:
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* `task_definition` - (Required) The ARN of the task definition which contains the container
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* `container_name` - (Required) The name of the container definition
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## Attributes Reference
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The following attributes are exported:
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* `image` - The docker image in use, including the digest
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* `image_digest` - The digest of the docker image in use
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* `cpu` - The CPU limit for this container definition
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* `memory` - The memory limit for this container definition
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* `environment` - The environment in use
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* `disable_networking` - Indicator if networking is disabled
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* `docker_labels` - Set docker labels
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@ -16,6 +16,9 @@
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<li<%= sidebar_current("docs-aws-datasource-ami") %>>
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<a href="/docs/providers/aws/d/ami.html">aws_ami</a>
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</li>
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<li<%= sidebar_current("docs-aws-datasource-ecs-container-definition") %>>
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<a href="/docs/providers/aws/d/ecs_container_definition.html">aws_ecs_container_definition</a>
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</li>
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<li<%= sidebar_current("docs-aws-datasource-availability-zones") %>>
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<a href="/docs/providers/aws/d/availability_zones.html">aws_availability_zones</a>
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</li>
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