Add support for ElasticSearch 7.8+ component templates

Signed-off-by: Yann Soubeyrand <yann.soubeyrand@camptocamp.com>

es/diff_suppress_funcs.go

@@ -51,6 +51,26 @@ func diffSuppressComposableIndexTemplate(k, old, new string, d *schema.ResourceD
 	return reflect.DeepEqual(oo, no)
 }
 
+func diffSuppressComponentTemplate(k, old, new string, d *schema.ResourceData) bool {
+	var oo, no interface{}
+	if err := json.Unmarshal([]byte(old), &oo); err != nil {
+		return false
+	}
+	if err := json.Unmarshal([]byte(new), &no); err != nil {
+		return false
+	}
+
+	if om, ok := oo.(map[string]interface{}); ok {
+		normalizeComponentTemplate(om)
+	}
+
+	if nm, ok := no.(map[string]interface{}); ok {
+		normalizeComponentTemplate(nm)
+	}
+
+	return reflect.DeepEqual(oo, no)
+}
+
 func diffSuppressDestination(k, old, new string, d *schema.ResourceData) bool {
 	var oo, no interface{}
 	if err := json.Unmarshal([]byte(old), &oo); err != nil {

es/provider.go

@@ -169,6 +169,7 @@ func Provider() terraform.ResourceProvider {
 			"elasticsearch_index_lifecycle_policy":          resourceElasticsearchDeprecatedIndexLifecyclePolicy(),
 			"elasticsearch_index_template":                  resourceElasticsearchIndexTemplate(),
 			"elasticsearch_composable_index_template":       resourceElasticsearchComposableIndexTemplate(),
+			"elasticsearch_component_template":              resourceElasticsearchComponentTemplate(),
 			"elasticsearch_ingest_pipeline":                 resourceElasticsearchIngestPipeline(),
 			"elasticsearch_kibana_object":                   resourceElasticsearchKibanaObject(),
 			"elasticsearch_monitor":                         resourceElasticsearchDeprecatedMonitor(),

es/resource_elasticsearch_component_template.go

@@ -0,0 +1,178 @@
+package es
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"log"
+
+	"github.com/hashicorp/go-version"
+	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/helper/validation"
+	elastic7 "github.com/olivere/elastic/v7"
+)
+
+var componentTemplateMinimalVersion, _ = version.NewVersion("7.8.0")
+
+func resourceElasticsearchComponentTemplate() *schema.Resource {
+	return &schema.Resource{
+		Create: resourceElasticsearchComponentTemplateCreate,
+		Read:   resourceElasticsearchComponentTemplateRead,
+		Update: resourceElasticsearchComponentTemplateUpdate,
+		Delete: resourceElasticsearchComponentTemplateDelete,
+		Schema: map[string]*schema.Schema{
+			"name": {
+				Type:     schema.TypeString,
+				ForceNew: true,
+				Required: true,
+			},
+			"body": {
+				Type:             schema.TypeString,
+				Required:         true,
+				DiffSuppressFunc: diffSuppressComponentTemplate,
+				ValidateFunc:     validation.StringIsJSON,
+			},
+		},
+		Importer: &schema.ResourceImporter{
+			State: schema.ImportStatePassthrough,
+		},
+	}
+}
+
+func resourceElasticsearchComponentTemplateCreate(d *schema.ResourceData, meta interface{}) error {
+	err := resourceElasticsearchPutComponentTemplate(d, meta, true)
+	if err != nil {
+		return err
+	}
+	d.SetId(d.Get("name").(string))
+	return nil
+}
+
+func resourceElasticsearchComponentTemplateRead(d *schema.ResourceData, meta interface{}) error {
+	id := d.Id()
+
+	var result string
+	var elasticVersion *version.Version
+
+	esClient, err := getClient(meta.(*ProviderConf))
+	if err != nil {
+		return err
+	}
+
+	switch client := esClient.(type) {
+	case *elastic7.Client:
+		elasticVersion, err = elastic7GetVersion(client)
+		if err == nil {
+			if elasticVersion.LessThan(componentTemplateMinimalVersion) {
+				err = fmt.Errorf("component_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
+			} else {
+				result, err = elastic7GetComponentTemplate(client, id)
+			}
+		}
+	default:
+		err = fmt.Errorf("component_template endpoint only available from ElasticSearch >= 7.8, got version < 7.0.0")
+	}
+	if err != nil {
+		if elastic7.IsNotFound(err) {
+			log.Printf("[WARN] Index template (%s) not found, removing from state", id)
+			d.SetId("")
+			return nil
+		}
+
+		return err
+	}
+
+	ds := &resourceDataSetter{d: d}
+	ds.set("name", d.Id())
+	ds.set("body", result)
+	return ds.err
+}
+
+func elastic7GetComponentTemplate(client *elastic7.Client, id string) (string, error) {
+	res, err := client.IndexGetComponentTemplate(id).Do(context.TODO())
+	if err != nil {
+		return "", err
+	}
+
+	// No more than 1 element is expected, if the index template is not found, previous call should
+	// return a 404 error
+	t := res.ComponentTemplates[0].ComponentTemplate
+	tj, err := json.Marshal(t)
+	if err != nil {
+		return "", err
+	}
+	return string(tj), nil
+}
+
+func resourceElasticsearchComponentTemplateUpdate(d *schema.ResourceData, meta interface{}) error {
+	return resourceElasticsearchPutComponentTemplate(d, meta, false)
+}
+
+func resourceElasticsearchComponentTemplateDelete(d *schema.ResourceData, meta interface{}) error {
+	id := d.Id()
+
+	var elasticVersion *version.Version
+
+	esClient, err := getClient(meta.(*ProviderConf))
+	if err != nil {
+		return err
+	}
+
+	switch client := esClient.(type) {
+	case *elastic7.Client:
+		elasticVersion, err = elastic7GetVersion(client)
+		if err == nil {
+			if elasticVersion.LessThan(componentTemplateMinimalVersion) {
+				err = fmt.Errorf("component_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
+			} else {
+				err = elastic7DeleteComponentTemplate(client, id)
+			}
+		}
+	default:
+		err = fmt.Errorf("component_template endpoint only available from ElasticSearch >= 7.8, got version < 7.0.0")
+	}
+
+	if err != nil {
+		return err
+	}
+	d.SetId("")
+	return nil
+}
+
+func elastic7DeleteComponentTemplate(client *elastic7.Client, id string) error {
+	_, err := client.IndexDeleteComponentTemplate(id).Do(context.TODO())
+	return err
+}
+
+func resourceElasticsearchPutComponentTemplate(d *schema.ResourceData, meta interface{}, create bool) error {
+	name := d.Get("name").(string)
+	body := d.Get("body").(string)
+
+	var elasticVersion *version.Version
+
+	esClient, err := getClient(meta.(*ProviderConf))
+	if err != nil {
+		return err
+	}
+
+	switch client := esClient.(type) {
+	case *elastic7.Client:
+		elasticVersion, err = elastic7GetVersion(client)
+		if err == nil {
+			if elasticVersion.LessThan(componentTemplateMinimalVersion) {
+				err = fmt.Errorf("component_template endpoint only available from ElasticSearch >= 7.8, got version %s", elasticVersion.String())
+			} else {
+				err = elastic7PutComponentTemplate(client, name, body, create)
+			}
+		}
+	default:
+		err = fmt.Errorf("component_template endpoint only available from ElasticSearch >= 7.8, got version < 7.0.0")
+	}
+
+	return err
+}
+
+func elastic7PutComponentTemplate(client *elastic7.Client, name string, body string, create bool) error {
+	_, err := client.IndexPutComponentTemplate(name).BodyString(body).Create(create).Do(context.TODO())
+	return err
+}