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data_source_aws_ebs_snapshot.go
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data_source_aws_ebs_snapshot.go
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package aws
import (
"fmt"
"log"
"sort"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/hashicorp/terraform/helper/schema"
)
func dataSourceAwsEbsSnapshot() *schema.Resource {
return &schema.Resource{
Read: dataSourceAwsEbsSnapshotRead,
Schema: map[string]*schema.Schema{
//selection criteria
"filter": dataSourceFiltersSchema(),
"most_recent": {
Type: schema.TypeBool,
Optional: true,
Default: false,
ForceNew: true,
},
"owners": {
Type: schema.TypeList,
Optional: true,
ForceNew: true,
Elem: &schema.Schema{Type: schema.TypeString},
},
"snapshot_ids": {
Type: schema.TypeList,
Optional: true,
ForceNew: true,
Elem: &schema.Schema{Type: schema.TypeString},
},
"restorable_by_user_ids": {
Type: schema.TypeList,
Optional: true,
ForceNew: true,
Elem: &schema.Schema{Type: schema.TypeString},
},
//Computed values returned
"snapshot_id": {
Type: schema.TypeString,
Computed: true,
},
"volume_id": {
Type: schema.TypeString,
Computed: true,
},
"state": {
Type: schema.TypeString,
Computed: true,
},
"owner_id": {
Type: schema.TypeString,
Computed: true,
},
"owner_alias": {
Type: schema.TypeString,
Computed: true,
},
"encrypted": {
Type: schema.TypeBool,
Computed: true,
},
"description": {
Type: schema.TypeString,
Computed: true,
},
"volume_size": {
Type: schema.TypeInt,
Computed: true,
},
"kms_key_id": {
Type: schema.TypeString,
Computed: true,
},
"data_encryption_key_id": {
Type: schema.TypeString,
Computed: true,
},
"tags": dataSourceTagsSchema(),
},
}
}
func dataSourceAwsEbsSnapshotRead(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
restorableUsers, restorableUsersOk := d.GetOk("restorable_by_user_ids")
filters, filtersOk := d.GetOk("filter")
snapshotIds, snapshotIdsOk := d.GetOk("snapshot_ids")
owners, ownersOk := d.GetOk("owners")
if restorableUsers == false && filtersOk == false && snapshotIds == false && ownersOk == false {
return fmt.Errorf("One of snapshot_ids, filters, restorable_by_user_ids, or owners must be assigned")
}
params := &ec2.DescribeSnapshotsInput{}
if restorableUsersOk {
params.RestorableByUserIds = expandStringList(restorableUsers.([]interface{}))
}
if filtersOk {
params.Filters = buildAwsDataSourceFilters(filters.(*schema.Set))
}
if ownersOk {
params.OwnerIds = expandStringList(owners.([]interface{}))
}
if snapshotIdsOk {
params.SnapshotIds = expandStringList(snapshotIds.([]interface{}))
}
resp, err := conn.DescribeSnapshots(params)
if err != nil {
return err
}
var snapshot *ec2.Snapshot
if len(resp.Snapshots) < 1 {
return fmt.Errorf("Your query returned no results. Please change your search criteria and try again.")
}
if len(resp.Snapshots) > 1 {
recent := d.Get("most_recent").(bool)
log.Printf("[DEBUG] aws_ebs_snapshot - multiple results found and `most_recent` is set to: %t", recent)
if recent {
snapshot = mostRecentSnapshot(resp.Snapshots)
} else {
return fmt.Errorf("Your query returned more than one result. Please try a more specific search criteria.")
}
} else {
snapshot = resp.Snapshots[0]
}
//Single Snapshot found so set to state
return snapshotDescriptionAttributes(d, snapshot)
}
type snapshotSort []*ec2.Snapshot
func (a snapshotSort) Len() int { return len(a) }
func (a snapshotSort) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a snapshotSort) Less(i, j int) bool {
itime := *a[i].StartTime
jtime := *a[j].StartTime
return itime.Unix() < jtime.Unix()
}
func mostRecentSnapshot(snapshots []*ec2.Snapshot) *ec2.Snapshot {
sortedSnapshots := snapshots
sort.Sort(snapshotSort(sortedSnapshots))
return sortedSnapshots[len(sortedSnapshots)-1]
}
func snapshotDescriptionAttributes(d *schema.ResourceData, snapshot *ec2.Snapshot) error {
d.SetId(*snapshot.SnapshotId)
d.Set("snapshot_id", snapshot.SnapshotId)
d.Set("volume_id", snapshot.VolumeId)
d.Set("data_encryption_key_id", snapshot.DataEncryptionKeyId)
d.Set("description", snapshot.Description)
d.Set("encrypted", snapshot.Encrypted)
d.Set("kms_key_id", snapshot.KmsKeyId)
d.Set("volume_size", snapshot.VolumeSize)
d.Set("state", snapshot.State)
d.Set("owner_id", snapshot.OwnerId)
d.Set("owner_alias", snapshot.OwnerAlias)
if err := d.Set("tags", dataSourceTags(snapshot.Tags)); err != nil {
return err
}
return nil
}