314 lines
8.7 KiB
Go
314 lines
8.7 KiB
Go
package aws
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import (
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"bytes"
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"fmt"
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"log"
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"regexp"
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"strings"
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"time"
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"github.com/hashicorp/terraform/helper/hashcode"
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"github.com/hashicorp/terraform/helper/resource"
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"github.com/hashicorp/terraform/helper/schema"
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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/iam"
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"github.com/aws/aws-sdk-go/service/rds"
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)
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func resourceAwsDbParameterGroup() *schema.Resource {
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return &schema.Resource{
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Create: resourceAwsDbParameterGroupCreate,
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Read: resourceAwsDbParameterGroupRead,
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Update: resourceAwsDbParameterGroupUpdate,
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Delete: resourceAwsDbParameterGroupDelete,
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Schema: map[string]*schema.Schema{
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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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"name": &schema.Schema{
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Type: schema.TypeString,
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ForceNew: true,
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Required: true,
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ValidateFunc: validateDbParamGroupName,
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},
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"family": &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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"description": &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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"parameter": &schema.Schema{
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Type: schema.TypeSet,
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Optional: true,
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ForceNew: false,
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Elem: &schema.Resource{
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Schema: map[string]*schema.Schema{
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"name": &schema.Schema{
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Type: schema.TypeString,
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Required: true,
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},
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"value": &schema.Schema{
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Type: schema.TypeString,
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Required: true,
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},
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"apply_method": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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Default: "immediate",
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// this parameter is not actually state, but a
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// meta-parameter describing how the RDS API call
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// to modify the parameter group should be made.
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// Future reads of the resource from AWS don't tell
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// us what we used for apply_method previously, so
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// by squashing state to an empty string we avoid
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// needing to do an update for every future run.
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StateFunc: func(interface{}) string { return "" },
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},
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},
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},
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Set: resourceAwsDbParameterHash,
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},
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"tags": tagsSchema(),
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},
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}
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}
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func resourceAwsDbParameterGroupCreate(d *schema.ResourceData, meta interface{}) error {
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rdsconn := meta.(*AWSClient).rdsconn
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tags := tagsFromMapRDS(d.Get("tags").(map[string]interface{}))
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createOpts := rds.CreateDBParameterGroupInput{
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DBParameterGroupName: aws.String(d.Get("name").(string)),
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DBParameterGroupFamily: aws.String(d.Get("family").(string)),
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Description: aws.String(d.Get("description").(string)),
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Tags: tags,
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}
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log.Printf("[DEBUG] Create DB Parameter Group: %#v", createOpts)
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_, err := rdsconn.CreateDBParameterGroup(&createOpts)
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if err != nil {
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return fmt.Errorf("Error creating DB Parameter Group: %s", err)
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}
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d.Partial(true)
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d.SetPartial("name")
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d.SetPartial("family")
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d.SetPartial("description")
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d.Partial(false)
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d.SetId(*createOpts.DBParameterGroupName)
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log.Printf("[INFO] DB Parameter Group ID: %s", d.Id())
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return resourceAwsDbParameterGroupUpdate(d, meta)
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}
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func resourceAwsDbParameterGroupRead(d *schema.ResourceData, meta interface{}) error {
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rdsconn := meta.(*AWSClient).rdsconn
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describeOpts := rds.DescribeDBParameterGroupsInput{
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DBParameterGroupName: aws.String(d.Id()),
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}
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describeResp, err := rdsconn.DescribeDBParameterGroups(&describeOpts)
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if err != nil {
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return err
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}
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if len(describeResp.DBParameterGroups) != 1 ||
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*describeResp.DBParameterGroups[0].DBParameterGroupName != d.Id() {
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return fmt.Errorf("Unable to find Parameter Group: %#v", describeResp.DBParameterGroups)
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}
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d.Set("name", describeResp.DBParameterGroups[0].DBParameterGroupName)
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d.Set("family", describeResp.DBParameterGroups[0].DBParameterGroupFamily)
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d.Set("description", describeResp.DBParameterGroups[0].Description)
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// Only include user customized parameters as there's hundreds of system/default ones
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describeParametersOpts := rds.DescribeDBParametersInput{
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DBParameterGroupName: aws.String(d.Id()),
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Source: aws.String("user"),
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}
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describeParametersResp, err := rdsconn.DescribeDBParameters(&describeParametersOpts)
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if err != nil {
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return err
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}
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d.Set("parameter", flattenParameters(describeParametersResp.Parameters))
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paramGroup := describeResp.DBParameterGroups[0]
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arn, err := buildRDSPGARN(d, meta)
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if err != nil {
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name := "<empty>"
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if paramGroup.DBParameterGroupName != nil && *paramGroup.DBParameterGroupName != "" {
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name = *paramGroup.DBParameterGroupName
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}
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log.Printf("[DEBUG] Error building ARN for DB Parameter Group, not setting Tags for Param Group %s", name)
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} else {
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d.Set("arn", arn)
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resp, err := rdsconn.ListTagsForResource(&rds.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 dt []*rds.Tag
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if len(resp.TagList) > 0 {
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dt = resp.TagList
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}
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d.Set("tags", tagsToMapRDS(dt))
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}
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return nil
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}
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func resourceAwsDbParameterGroupUpdate(d *schema.ResourceData, meta interface{}) error {
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rdsconn := meta.(*AWSClient).rdsconn
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d.Partial(true)
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if d.HasChange("parameter") {
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o, n := d.GetChange("parameter")
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if o == nil {
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o = new(schema.Set)
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}
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if n == nil {
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n = new(schema.Set)
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}
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os := o.(*schema.Set)
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ns := n.(*schema.Set)
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// Expand the "parameter" set to aws-sdk-go compat []rds.Parameter
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parameters, err := expandParameters(ns.Difference(os).List())
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if err != nil {
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return err
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}
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if len(parameters) > 0 {
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modifyOpts := rds.ModifyDBParameterGroupInput{
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DBParameterGroupName: aws.String(d.Get("name").(string)),
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Parameters: parameters,
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}
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log.Printf("[DEBUG] Modify DB Parameter Group: %s", modifyOpts)
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_, err = rdsconn.ModifyDBParameterGroup(&modifyOpts)
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if err != nil {
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return fmt.Errorf("Error modifying DB Parameter Group: %s", err)
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}
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}
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d.SetPartial("parameter")
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}
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if arn, err := buildRDSPGARN(d, meta); err == nil {
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if err := setTagsRDS(rdsconn, d, arn); err != nil {
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return err
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} else {
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d.SetPartial("tags")
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}
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}
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d.Partial(false)
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return resourceAwsDbParameterGroupRead(d, meta)
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}
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func resourceAwsDbParameterGroupDelete(d *schema.ResourceData, meta interface{}) error {
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stateConf := &resource.StateChangeConf{
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Pending: []string{"pending"},
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Target: "destroyed",
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Refresh: resourceAwsDbParameterGroupDeleteRefreshFunc(d, meta),
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Timeout: 3 * time.Minute,
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MinTimeout: 1 * time.Second,
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}
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_, err := stateConf.WaitForState()
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return err
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}
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func resourceAwsDbParameterGroupDeleteRefreshFunc(
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d *schema.ResourceData,
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meta interface{}) resource.StateRefreshFunc {
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rdsconn := meta.(*AWSClient).rdsconn
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return func() (interface{}, string, error) {
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deleteOpts := rds.DeleteDBParameterGroupInput{
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DBParameterGroupName: aws.String(d.Id()),
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}
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if _, err := rdsconn.DeleteDBParameterGroup(&deleteOpts); err != nil {
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rdserr, ok := err.(awserr.Error)
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if !ok {
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return d, "error", err
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}
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if rdserr.Code() != "DBParameterGroupNotFoundFault" {
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return d, "error", err
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}
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}
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return d, "destroyed", nil
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}
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}
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func resourceAwsDbParameterHash(v interface{}) int {
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var buf bytes.Buffer
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m := v.(map[string]interface{})
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buf.WriteString(fmt.Sprintf("%s-", m["name"].(string)))
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// Store the value as a lower case string, to match how we store them in flattenParameters
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buf.WriteString(fmt.Sprintf("%s-", strings.ToLower(m["value"].(string))))
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return hashcode.String(buf.String())
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}
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func buildRDSPGARN(d *schema.ResourceData, meta interface{}) (string, error) {
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iamconn := meta.(*AWSClient).iamconn
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region := meta.(*AWSClient).region
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// An zero value GetUserInput{} defers to the currently logged in user
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resp, err := iamconn.GetUser(&iam.GetUserInput{})
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if err != nil {
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return "", err
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}
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userARN := *resp.User.Arn
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accountID := strings.Split(userARN, ":")[4]
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arn := fmt.Sprintf("arn:aws:rds:%s:%s:pg:%s", region, accountID, d.Id())
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return arn, nil
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}
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func validateDbParamGroupName(v interface{}, k string) (ws []string, errors []error) {
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value := v.(string)
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if !regexp.MustCompile(`^[0-9a-z-]+$`).MatchString(value) {
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errors = append(errors, fmt.Errorf(
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"only lowercase alphanumeric characters and hyphens allowed in %q", k))
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}
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if !regexp.MustCompile(`^[a-z]`).MatchString(value) {
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errors = append(errors, fmt.Errorf(
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"first character of %q must be a letter", k))
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}
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if regexp.MustCompile(`--`).MatchString(value) {
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errors = append(errors, fmt.Errorf(
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"%q cannot contain two consecutive hyphens", k))
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}
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if regexp.MustCompile(`-$`).MatchString(value) {
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errors = append(errors, fmt.Errorf(
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"%q cannot end with a hyphen", k))
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}
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if len(value) > 255 {
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errors = append(errors, fmt.Errorf(
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"%q cannot be greater than 255 characters", k))
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}
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return
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}
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