675 lines
21 KiB
Go
675 lines
21 KiB
Go
package aws
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import (
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"fmt"
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"log"
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"sort"
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"strings"
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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/elasticache"
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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 resourceAwsElastiCacheCommonSchema() map[string]*schema.Schema {
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return map[string]*schema.Schema{
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"availability_zones": &schema.Schema{
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Type: schema.TypeSet,
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Optional: 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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"node_type": &schema.Schema{
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Type: schema.TypeString,
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Required: true,
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},
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"engine": &schema.Schema{
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Type: schema.TypeString,
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Required: true,
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},
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"engine_version": &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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"parameter_group_name": &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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"subnet_group_name": &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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ForceNew: true,
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},
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"security_group_names": &schema.Schema{
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Type: schema.TypeSet,
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Optional: true,
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Computed: 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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Optional: true,
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Computed: 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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// A single-element string list containing an Amazon Resource Name (ARN) that
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// uniquely identifies a Redis RDB snapshot file stored in Amazon S3. The snapshot
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// file will be used to populate the node group.
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//
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// See also:
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// https://github.com/aws/aws-sdk-go/blob/4862a174f7fc92fb523fc39e68f00b87d91d2c3d/service/elasticache/api.go#L2079
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"snapshot_arns": &schema.Schema{
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Type: schema.TypeSet,
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Optional: 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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"snapshot_window": &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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"snapshot_name": &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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},
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"maintenance_window": &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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StateFunc: func(val interface{}) string {
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// Elasticache always changes the maintenance
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// to lowercase
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return strings.ToLower(val.(string))
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},
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},
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"port": &schema.Schema{
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Type: schema.TypeInt,
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Required: true,
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ForceNew: true,
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},
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"notification_topic_arn": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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},
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"snapshot_retention_limit": &schema.Schema{
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Type: schema.TypeInt,
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Optional: true,
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ValidateFunc: func(v interface{}, k string) (ws []string, es []error) {
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value := v.(int)
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if value > 35 {
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es = append(es, fmt.Errorf(
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"snapshot retention limit cannot be more than 35 days"))
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}
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return
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},
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},
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"apply_immediately": &schema.Schema{
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Type: schema.TypeBool,
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Optional: true,
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Computed: true,
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},
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"tags": tagsSchema(),
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}
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}
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func resourceAwsElasticacheCluster() *schema.Resource {
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resourceSchema := resourceAwsElastiCacheCommonSchema()
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resourceSchema["cluster_id"] = &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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StateFunc: func(val interface{}) string {
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// Elasticache normalizes cluster ids to lowercase,
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// so we have to do this too or else we can end up
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// with non-converging diffs.
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return strings.ToLower(val.(string))
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},
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ValidateFunc: validateElastiCacheClusterId,
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}
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resourceSchema["num_cache_nodes"] = &schema.Schema{
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Type: schema.TypeInt,
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Required: true,
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}
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resourceSchema["az_mode"] = &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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ForceNew: true,
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}
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resourceSchema["availability_zone"] = &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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ForceNew: true,
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}
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resourceSchema["configuration_endpoint"] = &schema.Schema{
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Type: schema.TypeString,
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Computed: true,
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}
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resourceSchema["cluster_address"] = &schema.Schema{
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Type: schema.TypeString,
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Computed: true,
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}
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resourceSchema["replication_group_id"] = &schema.Schema{
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Type: schema.TypeString,
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Computed: true,
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}
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resourceSchema["cache_nodes"] = &schema.Schema{
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Type: schema.TypeList,
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Computed: true,
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Elem: &schema.Resource{
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Schema: map[string]*schema.Schema{
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"id": &schema.Schema{
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Type: schema.TypeString,
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Computed: true,
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},
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"address": &schema.Schema{
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Type: schema.TypeString,
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Computed: true,
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},
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"port": &schema.Schema{
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Type: schema.TypeInt,
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Computed: true,
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},
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"availability_zone": &schema.Schema{
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Type: schema.TypeString,
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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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return &schema.Resource{
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Create: resourceAwsElasticacheClusterCreate,
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Read: resourceAwsElasticacheClusterRead,
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Update: resourceAwsElasticacheClusterUpdate,
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Delete: resourceAwsElasticacheClusterDelete,
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Importer: &schema.ResourceImporter{
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State: schema.ImportStatePassthrough,
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},
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Schema: resourceSchema,
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}
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}
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func resourceAwsElasticacheClusterCreate(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).elasticacheconn
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clusterId := d.Get("cluster_id").(string)
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nodeType := d.Get("node_type").(string) // e.g) cache.m1.small
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numNodes := int64(d.Get("num_cache_nodes").(int)) // 2
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engine := d.Get("engine").(string) // memcached
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engineVersion := d.Get("engine_version").(string) // 1.4.14
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port := int64(d.Get("port").(int)) // e.g) 11211
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subnetGroupName := d.Get("subnet_group_name").(string)
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securityNameSet := d.Get("security_group_names").(*schema.Set)
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securityIdSet := d.Get("security_group_ids").(*schema.Set)
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securityNames := expandStringList(securityNameSet.List())
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securityIds := expandStringList(securityIdSet.List())
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tags := tagsFromMapEC(d.Get("tags").(map[string]interface{}))
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req := &elasticache.CreateCacheClusterInput{
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CacheClusterId: aws.String(clusterId),
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CacheNodeType: aws.String(nodeType),
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NumCacheNodes: aws.Int64(numNodes),
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Engine: aws.String(engine),
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EngineVersion: aws.String(engineVersion),
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Port: aws.Int64(port),
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CacheSubnetGroupName: aws.String(subnetGroupName),
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CacheSecurityGroupNames: securityNames,
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SecurityGroupIds: securityIds,
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Tags: tags,
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}
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// parameter groups are optional and can be defaulted by AWS
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if v, ok := d.GetOk("parameter_group_name"); ok {
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req.CacheParameterGroupName = aws.String(v.(string))
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}
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if v, ok := d.GetOk("snapshot_retention_limit"); ok {
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req.SnapshotRetentionLimit = aws.Int64(int64(v.(int)))
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}
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if v, ok := d.GetOk("snapshot_window"); ok {
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req.SnapshotWindow = aws.String(v.(string))
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}
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if v, ok := d.GetOk("maintenance_window"); ok {
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req.PreferredMaintenanceWindow = aws.String(v.(string))
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}
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if v, ok := d.GetOk("notification_topic_arn"); ok {
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req.NotificationTopicArn = aws.String(v.(string))
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}
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snaps := d.Get("snapshot_arns").(*schema.Set).List()
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if len(snaps) > 0 {
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s := expandStringList(snaps)
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req.SnapshotArns = s
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log.Printf("[DEBUG] Restoring Redis cluster from S3 snapshot: %#v", s)
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}
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if v, ok := d.GetOk("snapshot_name"); ok {
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req.SnapshotName = aws.String(v.(string))
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}
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if v, ok := d.GetOk("az_mode"); ok {
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req.AZMode = aws.String(v.(string))
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}
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if v, ok := d.GetOk("availability_zone"); ok {
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req.PreferredAvailabilityZone = aws.String(v.(string))
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}
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preferred_azs := d.Get("availability_zones").(*schema.Set).List()
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if len(preferred_azs) > 0 {
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azs := expandStringList(preferred_azs)
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req.PreferredAvailabilityZones = azs
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}
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if v, ok := d.GetOk("replication_group_id"); ok {
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req.ReplicationGroupId = aws.String(v.(string))
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}
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resp, err := conn.CreateCacheCluster(req)
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if err != nil {
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return fmt.Errorf("Error creating Elasticache: %s", err)
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}
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// Assign the cluster id as the resource ID
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// Elasticache always retains the id in lower case, so we have to
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// mimic that or else we won't be able to refresh a resource whose
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// name contained uppercase characters.
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d.SetId(strings.ToLower(*resp.CacheCluster.CacheClusterId))
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pending := []string{"creating", "modifying", "restoring"}
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stateConf := &resource.StateChangeConf{
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Pending: pending,
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Target: []string{"available"},
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Refresh: cacheClusterStateRefreshFunc(conn, d.Id(), "available", pending),
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Timeout: 40 * time.Minute,
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MinTimeout: 10 * time.Second,
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Delay: 30 * time.Second,
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}
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log.Printf("[DEBUG] Waiting for state to become available: %v", d.Id())
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_, sterr := stateConf.WaitForState()
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if sterr != nil {
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return fmt.Errorf("Error waiting for elasticache (%s) to be created: %s", d.Id(), sterr)
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}
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return resourceAwsElasticacheClusterRead(d, meta)
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}
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func resourceAwsElasticacheClusterRead(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).elasticacheconn
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req := &elasticache.DescribeCacheClustersInput{
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CacheClusterId: aws.String(d.Id()),
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ShowCacheNodeInfo: aws.Bool(true),
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}
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res, err := conn.DescribeCacheClusters(req)
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if err != nil {
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if eccErr, ok := err.(awserr.Error); ok && eccErr.Code() == "CacheClusterNotFound" {
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log.Printf("[WARN] ElastiCache Cluster (%s) not found", d.Id())
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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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if len(res.CacheClusters) == 1 {
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c := res.CacheClusters[0]
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d.Set("cluster_id", c.CacheClusterId)
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d.Set("node_type", c.CacheNodeType)
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d.Set("num_cache_nodes", c.NumCacheNodes)
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d.Set("engine", c.Engine)
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d.Set("engine_version", c.EngineVersion)
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if c.ConfigurationEndpoint != nil {
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d.Set("port", c.ConfigurationEndpoint.Port)
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d.Set("configuration_endpoint", aws.String(fmt.Sprintf("%s:%d", *c.ConfigurationEndpoint.Address, *c.ConfigurationEndpoint.Port)))
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d.Set("cluster_address", aws.String(fmt.Sprintf("%s", *c.ConfigurationEndpoint.Address)))
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}
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if c.ReplicationGroupId != nil {
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d.Set("replication_group_id", c.ReplicationGroupId)
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}
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d.Set("subnet_group_name", c.CacheSubnetGroupName)
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d.Set("security_group_names", flattenElastiCacheSecurityGroupNames(c.CacheSecurityGroups))
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d.Set("security_group_ids", flattenElastiCacheSecurityGroupIds(c.SecurityGroups))
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if c.CacheParameterGroup != nil {
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d.Set("parameter_group_name", c.CacheParameterGroup.CacheParameterGroupName)
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}
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d.Set("maintenance_window", c.PreferredMaintenanceWindow)
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d.Set("snapshot_window", c.SnapshotWindow)
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d.Set("snapshot_retention_limit", c.SnapshotRetentionLimit)
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if c.NotificationConfiguration != nil {
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if *c.NotificationConfiguration.TopicStatus == "active" {
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d.Set("notification_topic_arn", c.NotificationConfiguration.TopicArn)
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}
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}
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d.Set("availability_zone", c.PreferredAvailabilityZone)
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if err := setCacheNodeData(d, c); err != nil {
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return err
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}
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// list tags for resource
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// set tags
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arn, err := buildECARN(d.Id(), meta.(*AWSClient).partition, meta.(*AWSClient).accountid, meta.(*AWSClient).region)
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if err != nil {
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log.Printf("[DEBUG] Error building ARN for ElastiCache Cluster, not setting Tags for cluster %s", *c.CacheClusterId)
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} else {
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resp, err := conn.ListTagsForResource(&elasticache.ListTagsForResourceInput{
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ResourceName: aws.String(arn),
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})
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if err != nil {
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log.Printf("[DEBUG] Error retrieving tags for ARN: %s", arn)
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}
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var et []*elasticache.Tag
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if len(resp.TagList) > 0 {
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et = resp.TagList
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}
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d.Set("tags", tagsToMapEC(et))
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}
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}
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return nil
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}
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func resourceAwsElasticacheClusterUpdate(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).elasticacheconn
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arn, err := buildECARN(d.Id(), meta.(*AWSClient).partition, meta.(*AWSClient).accountid, meta.(*AWSClient).region)
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if err != nil {
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log.Printf("[DEBUG] Error building ARN for ElastiCache Cluster, not updating Tags for cluster %s", d.Id())
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} else {
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if err := setTagsEC(conn, d, arn); err != nil {
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return err
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}
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}
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req := &elasticache.ModifyCacheClusterInput{
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CacheClusterId: aws.String(d.Id()),
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ApplyImmediately: aws.Bool(d.Get("apply_immediately").(bool)),
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}
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requestUpdate := false
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if d.HasChange("security_group_ids") {
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if attr := d.Get("security_group_ids").(*schema.Set); attr.Len() > 0 {
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req.SecurityGroupIds = expandStringList(attr.List())
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requestUpdate = true
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}
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}
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if d.HasChange("parameter_group_name") {
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req.CacheParameterGroupName = aws.String(d.Get("parameter_group_name").(string))
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requestUpdate = true
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}
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if d.HasChange("maintenance_window") {
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req.PreferredMaintenanceWindow = aws.String(d.Get("maintenance_window").(string))
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requestUpdate = true
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}
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if d.HasChange("notification_topic_arn") {
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v := d.Get("notification_topic_arn").(string)
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req.NotificationTopicArn = aws.String(v)
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if v == "" {
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inactive := "inactive"
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req.NotificationTopicStatus = &inactive
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}
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requestUpdate = true
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}
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if d.HasChange("engine_version") {
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req.EngineVersion = aws.String(d.Get("engine_version").(string))
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requestUpdate = true
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}
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if d.HasChange("snapshot_window") {
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req.SnapshotWindow = aws.String(d.Get("snapshot_window").(string))
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requestUpdate = true
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}
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if d.HasChange("node_type") {
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req.CacheNodeType = aws.String(d.Get("node_type").(string))
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requestUpdate = true
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}
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if d.HasChange("snapshot_retention_limit") {
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req.SnapshotRetentionLimit = aws.Int64(int64(d.Get("snapshot_retention_limit").(int)))
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requestUpdate = true
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}
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if d.HasChange("num_cache_nodes") {
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oraw, nraw := d.GetChange("num_cache_nodes")
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o := oraw.(int)
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n := nraw.(int)
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if v, ok := d.GetOk("az_mode"); ok && v.(string) == "cross-az" && n == 1 {
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return fmt.Errorf("[WARN] Error updateing Elasticache cluster (%s), error: Cross-AZ mode is not supported in a single cache node.", d.Id())
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}
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if n < o {
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log.Printf("[INFO] Cluster %s is marked for Decreasing cache nodes from %d to %d", d.Id(), o, n)
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nodesToRemove := getCacheNodesToRemove(d, o, o-n)
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req.CacheNodeIdsToRemove = nodesToRemove
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}
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req.NumCacheNodes = aws.Int64(int64(d.Get("num_cache_nodes").(int)))
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requestUpdate = true
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}
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if requestUpdate {
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log.Printf("[DEBUG] Modifying ElastiCache Cluster (%s), opts:\n%s", d.Id(), req)
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_, err := conn.ModifyCacheCluster(req)
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if err != nil {
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return fmt.Errorf("[WARN] Error updating ElastiCache cluster (%s), error: %s", d.Id(), err)
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}
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log.Printf("[DEBUG] Waiting for update: %s", d.Id())
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pending := []string{"modifying", "rebooting cache cluster nodes", "snapshotting"}
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stateConf := &resource.StateChangeConf{
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Pending: pending,
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Target: []string{"available"},
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Refresh: cacheClusterStateRefreshFunc(conn, d.Id(), "available", pending),
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Timeout: 80 * time.Minute,
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MinTimeout: 10 * time.Second,
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Delay: 30 * time.Second,
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}
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_, sterr := stateConf.WaitForState()
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if sterr != nil {
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|
return fmt.Errorf("Error waiting for elasticache (%s) to update: %s", d.Id(), sterr)
|
|
}
|
|
}
|
|
|
|
return resourceAwsElasticacheClusterRead(d, meta)
|
|
}
|
|
|
|
func getCacheNodesToRemove(d *schema.ResourceData, oldNumberOfNodes int, cacheNodesToRemove int) []*string {
|
|
nodesIdsToRemove := []*string{}
|
|
for i := oldNumberOfNodes; i > oldNumberOfNodes-cacheNodesToRemove && i > 0; i-- {
|
|
s := fmt.Sprintf("%04d", i)
|
|
nodesIdsToRemove = append(nodesIdsToRemove, &s)
|
|
}
|
|
|
|
return nodesIdsToRemove
|
|
}
|
|
|
|
func setCacheNodeData(d *schema.ResourceData, c *elasticache.CacheCluster) error {
|
|
sortedCacheNodes := make([]*elasticache.CacheNode, len(c.CacheNodes))
|
|
copy(sortedCacheNodes, c.CacheNodes)
|
|
sort.Sort(byCacheNodeId(sortedCacheNodes))
|
|
|
|
cacheNodeData := make([]map[string]interface{}, 0, len(sortedCacheNodes))
|
|
|
|
for _, node := range sortedCacheNodes {
|
|
if node.CacheNodeId == nil || node.Endpoint == nil || node.Endpoint.Address == nil || node.Endpoint.Port == nil || node.CustomerAvailabilityZone == nil {
|
|
return fmt.Errorf("Unexpected nil pointer in: %s", node)
|
|
}
|
|
cacheNodeData = append(cacheNodeData, map[string]interface{}{
|
|
"id": *node.CacheNodeId,
|
|
"address": *node.Endpoint.Address,
|
|
"port": int(*node.Endpoint.Port),
|
|
"availability_zone": *node.CustomerAvailabilityZone,
|
|
})
|
|
}
|
|
|
|
return d.Set("cache_nodes", cacheNodeData)
|
|
}
|
|
|
|
type byCacheNodeId []*elasticache.CacheNode
|
|
|
|
func (b byCacheNodeId) Len() int { return len(b) }
|
|
func (b byCacheNodeId) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
|
|
func (b byCacheNodeId) Less(i, j int) bool {
|
|
return b[i].CacheNodeId != nil && b[j].CacheNodeId != nil &&
|
|
*b[i].CacheNodeId < *b[j].CacheNodeId
|
|
}
|
|
|
|
func resourceAwsElasticacheClusterDelete(d *schema.ResourceData, meta interface{}) error {
|
|
conn := meta.(*AWSClient).elasticacheconn
|
|
|
|
req := &elasticache.DeleteCacheClusterInput{
|
|
CacheClusterId: aws.String(d.Id()),
|
|
}
|
|
_, err := conn.DeleteCacheCluster(req)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
log.Printf("[DEBUG] Waiting for deletion: %v", d.Id())
|
|
stateConf := &resource.StateChangeConf{
|
|
Pending: []string{"creating", "available", "deleting", "incompatible-parameters", "incompatible-network", "restore-failed"},
|
|
Target: []string{},
|
|
Refresh: cacheClusterStateRefreshFunc(conn, d.Id(), "", []string{}),
|
|
Timeout: 40 * time.Minute,
|
|
MinTimeout: 10 * time.Second,
|
|
Delay: 30 * time.Second,
|
|
}
|
|
|
|
_, sterr := stateConf.WaitForState()
|
|
if sterr != nil {
|
|
return fmt.Errorf("Error waiting for elasticache (%s) to delete: %s", d.Id(), sterr)
|
|
}
|
|
|
|
d.SetId("")
|
|
|
|
return nil
|
|
}
|
|
|
|
func cacheClusterStateRefreshFunc(conn *elasticache.ElastiCache, clusterID, givenState string, pending []string) resource.StateRefreshFunc {
|
|
return func() (interface{}, string, error) {
|
|
resp, err := conn.DescribeCacheClusters(&elasticache.DescribeCacheClustersInput{
|
|
CacheClusterId: aws.String(clusterID),
|
|
ShowCacheNodeInfo: aws.Bool(true),
|
|
})
|
|
if err != nil {
|
|
apierr := err.(awserr.Error)
|
|
log.Printf("[DEBUG] message: %v, code: %v", apierr.Message(), apierr.Code())
|
|
if apierr.Message() == fmt.Sprintf("CacheCluster not found: %v", clusterID) {
|
|
log.Printf("[DEBUG] Detect deletion")
|
|
return nil, "", nil
|
|
}
|
|
|
|
log.Printf("[ERROR] CacheClusterStateRefreshFunc: %s", err)
|
|
return nil, "", err
|
|
}
|
|
|
|
if len(resp.CacheClusters) == 0 {
|
|
return nil, "", fmt.Errorf("[WARN] Error: no Cache Clusters found for id (%s)", clusterID)
|
|
}
|
|
|
|
var c *elasticache.CacheCluster
|
|
for _, cluster := range resp.CacheClusters {
|
|
if *cluster.CacheClusterId == clusterID {
|
|
log.Printf("[DEBUG] Found matching ElastiCache cluster: %s", *cluster.CacheClusterId)
|
|
c = cluster
|
|
}
|
|
}
|
|
|
|
if c == nil {
|
|
return nil, "", fmt.Errorf("[WARN] Error: no matching Elastic Cache cluster for id (%s)", clusterID)
|
|
}
|
|
|
|
log.Printf("[DEBUG] ElastiCache Cluster (%s) status: %v", clusterID, *c.CacheClusterStatus)
|
|
|
|
// return the current state if it's in the pending array
|
|
for _, p := range pending {
|
|
log.Printf("[DEBUG] ElastiCache: checking pending state (%s) for cluster (%s), cluster status: %s", pending, clusterID, *c.CacheClusterStatus)
|
|
s := *c.CacheClusterStatus
|
|
if p == s {
|
|
log.Printf("[DEBUG] Return with status: %v", *c.CacheClusterStatus)
|
|
return c, p, nil
|
|
}
|
|
}
|
|
|
|
// return given state if it's not in pending
|
|
if givenState != "" {
|
|
log.Printf("[DEBUG] ElastiCache: checking given state (%s) of cluster (%s) against cluster status (%s)", givenState, clusterID, *c.CacheClusterStatus)
|
|
// check to make sure we have the node count we're expecting
|
|
if int64(len(c.CacheNodes)) != *c.NumCacheNodes {
|
|
log.Printf("[DEBUG] Node count is not what is expected: %d found, %d expected", len(c.CacheNodes), *c.NumCacheNodes)
|
|
return nil, "creating", nil
|
|
}
|
|
|
|
log.Printf("[DEBUG] Node count matched (%d)", len(c.CacheNodes))
|
|
// loop the nodes and check their status as well
|
|
for _, n := range c.CacheNodes {
|
|
log.Printf("[DEBUG] Checking cache node for status: %s", n)
|
|
if n.CacheNodeStatus != nil && *n.CacheNodeStatus != "available" {
|
|
log.Printf("[DEBUG] Node (%s) is not yet available, status: %s", *n.CacheNodeId, *n.CacheNodeStatus)
|
|
return nil, "creating", nil
|
|
}
|
|
log.Printf("[DEBUG] Cache node not in expected state")
|
|
}
|
|
log.Printf("[DEBUG] ElastiCache returning given state (%s), cluster: %s", givenState, c)
|
|
return c, givenState, nil
|
|
}
|
|
log.Printf("[DEBUG] current status: %v", *c.CacheClusterStatus)
|
|
return c, *c.CacheClusterStatus, nil
|
|
}
|
|
}
|
|
|
|
func buildECARN(identifier, partition, accountid, region string) (string, error) {
|
|
if partition == "" {
|
|
return "", fmt.Errorf("Unable to construct ElastiCache ARN because of missing AWS partition")
|
|
}
|
|
if accountid == "" {
|
|
return "", fmt.Errorf("Unable to construct ElastiCache ARN because of missing AWS Account ID")
|
|
}
|
|
arn := fmt.Sprintf("arn:%s:elasticache:%s:%s:cluster:%s", partition, region, accountid, identifier)
|
|
return arn, nil
|
|
|
|
}
|