mirror of
https://github.com/letic/terraform-provider-google.git
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![Shinichi TAMURA](/assets/img/avatar_default.png)
Along the change on region_backend_service.backend[].group to use DiffSuppressFunc (#1487), we also need to change hash function, as [pointed out](https://github.com/terraform-providers/terraform-provider-google/pull/1487#issuecomment-389000239). Fixed this in a same way regular backend services do. https://github.com/terraform-providers/terraform-provider-google/blob/v1.12.0/google/resource_compute_backend_service_migrate.go#L102-L103
136 lines
3.4 KiB
Go
136 lines
3.4 KiB
Go
package google
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import (
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"fmt"
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"log"
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"strconv"
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"strings"
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"bytes"
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"github.com/hashicorp/terraform/helper/hashcode"
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"github.com/hashicorp/terraform/terraform"
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)
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func resourceComputeBackendServiceMigrateState(
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v int, is *terraform.InstanceState, meta interface{}) (*terraform.InstanceState, error) {
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if is.Empty() {
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log.Println("[DEBUG] Empty InstanceState; nothing to migrate.")
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return is, nil
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}
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switch v {
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case 0:
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log.Println("[INFO] Found Compute Backend Service State v0; migrating to v1")
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is, err := migrateBackendServiceStateV0toV1(is)
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if err != nil {
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return is, err
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}
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return is, nil
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default:
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return is, fmt.Errorf("Unexpected schema version: %d", v)
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}
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}
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func migrateBackendServiceStateV0toV1(is *terraform.InstanceState) (*terraform.InstanceState, error) {
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log.Printf("[DEBUG] Attributes before migration: %#v", is.Attributes)
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oldHashToValue := map[string]map[string]interface{}{}
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for k, v := range is.Attributes {
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if !strings.HasPrefix(k, "backend.") || k == "backend.#" {
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continue
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}
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// Key is now of the form backend.%d.%s
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kParts := strings.Split(k, ".")
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// Sanity check: two parts should be there and <N> should be a number
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badFormat := false
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if len(kParts) != 3 {
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badFormat = true
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} else if _, err := strconv.Atoi(kParts[1]); err != nil {
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badFormat = true
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}
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if badFormat {
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return is, fmt.Errorf("migration error: found backend key in unexpected format: %s", k)
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}
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if oldHashToValue[kParts[1]] == nil {
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oldHashToValue[kParts[1]] = map[string]interface{}{}
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}
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oldHashToValue[kParts[1]][kParts[2]] = v
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}
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oldHashToNewHash := map[string]int{}
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for k, v := range oldHashToValue {
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oldHashToNewHash[k] = resourceGoogleComputeBackendServiceBackendHash(v)
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}
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values := map[string]string{}
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for k, v := range is.Attributes {
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if !strings.HasPrefix(k, "backend.") {
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continue
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}
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if k == "backend.#" {
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continue
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}
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// Key is now of the form backend.%d.%s
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kParts := strings.Split(k, ".")
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newKey := fmt.Sprintf("%s.%d.%s", kParts[0], oldHashToNewHash[kParts[1]], kParts[2])
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values[newKey] = v
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delete(is.Attributes, k)
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}
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for k, v := range values {
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is.Attributes[k] = v
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}
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log.Printf("[DEBUG] Attributes after migration: %#v", is.Attributes)
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return is, nil
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}
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func resourceGoogleComputeBackendServiceBackendHash(v interface{}) int {
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if v == nil {
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return 0
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}
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var buf bytes.Buffer
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m := v.(map[string]interface{})
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if group, err := getRelativePath(m["group"].(string)); err != nil {
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log.Printf("[WARN] Error on retrieving relative path of instance group: %s", err)
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buf.WriteString(fmt.Sprintf("%s-", m["group"].(string)))
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} else {
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buf.WriteString(fmt.Sprintf("%s-", group))
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}
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if v, ok := m["balancing_mode"]; ok {
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buf.WriteString(fmt.Sprintf("%s-", v.(string)))
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}
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if v, ok := m["capacity_scaler"]; ok {
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buf.WriteString(fmt.Sprintf("%f-", v.(float64)))
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}
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if v, ok := m["description"]; ok {
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buf.WriteString(fmt.Sprintf("%s-", v.(string)))
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}
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if v, ok := m["max_rate"]; ok {
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buf.WriteString(fmt.Sprintf("%d-", int64(v.(int))))
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}
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if v, ok := m["max_rate_per_instance"]; ok {
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buf.WriteString(fmt.Sprintf("%f-", v.(float64)))
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}
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if v, ok := m["max_connections"]; ok {
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buf.WriteString(fmt.Sprintf("%d-", int64(v.(int))))
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}
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if v, ok := m["max_connections_per_instance"]; ok {
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buf.WriteString(fmt.Sprintf("%d-", int64(v.(int))))
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}
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if v, ok := m["max_rate_per_instance"]; ok {
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buf.WriteString(fmt.Sprintf("%f-", v.(float64)))
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}
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return hashcode.String(buf.String())
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}
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