[azurerm_redis_cache] Backup settings don't seem to be enabled

[TheFlyingArcher]

Community Note

• Please vote on this issue by adding a 👍 reaction to the original issue to help the community and maintainers prioritize this request
• Please do not leave "+1" or "me too" comments, they generate extra noise for issue followers and do not help prioritize the request
• If you are interested in working on this issue or have submitted a pull request, please leave a comment

Terraform (and AzureRM Provider) Version

bcline2@LAMU02WX315HTD6:~/src/terraform/ccoe/azure_redis_cache/examples/redis_cache_with_backup$ terraform -v
Terraform v0.11.10
+ provider.azurerm v1.20.0
+ provider.null v1.0.0
+ provider.random v2.0.0

Your version of Terraform is out of date! The latest version
is 0.11.11. You can update by downloading from www.terraform.io/downloads.html

Affected Resource(s)

• azurerm_redis_cache

Terraform Configuration Files

Calling module

module "clustered_redis_examples" {
  source                          = "../../modules/premium_redis"
  name                            = "clustered-redis"
  namespace                       = "${module.generate-random-name.name}"
  resource_group_name             = "${module.create-resource-group.name}"
  location                        = "westus"
  cache_size                      = "1"
  pricing_family                  = "P"
  sku_name                        = "Premium"
  backup_enabled                  = "true"
  shard_count                     = "1"
  backup_frequency                = "30"
  backup_snapshot_count           = "1"
  backup_storage_account_name     = "${module.redis_backup_storage.name}"
  backup_storage_account_endpoint = "${module.redis_backup_storage.primary_blob_endpoint}"
  backup_storage_account_key      = "${module.redis_backup_storage.primary_access_key}"
}

Definition

resource "azurerm_redis_cache" "premium_redis_cache_with_backup" {
  count               = "${var.backup_enabled == "true" ? 1 : 0}"
  name                = "${module.namespace.name}"
  location            = "${var.location}"
  resource_group_name = "${var.resource_group_name}"
  capacity            = "${var.cache_size}"
  family              = "${local.redis_family}"
  sku_name            = "${local.redis_sku}"
  enable_non_ssl_port = false
  shard_count         = "${var.shard_count}"

  redis_configuration {
    maxmemory_reserved = "${var.maxmemory_reserved}"
    maxmemory_delta    = "${var.maxmemory_delta}"
    maxmemory_policy   = "${var.maxmemory_policy}"

    rdb_backup_enabled            = true
    rdb_backup_frequency          = "${var.backup_frequency}"
    rdb_backup_max_snapshot_count = "${var.backup_snapshot_count}"
    rdb_storage_connection_string = "DefaultEndpointsProtocol=https;BlobEndpoint=${var.backup_storage_account_endpoint};AccountName=${var.backup_storage_account_name};AccountKey=${var.backup_storage_account_key}"
  }
}

Debug Output

If you need this, contact me as it contains sensitive items not wanting exposed publically

Expected Behavior

Based on what I understand, when I go to Azure portal, Redis data persistance should be enabled. I see the the values being set when I view the output from the plan generated

  + module.clustered_redis_examples.azurerm_redis_cache.premium_redis_cache_with_backup
      id:                                                  <computed>
      capacity:                                            "1"
      enable_non_ssl_port:                                 "false"
      family:                                              "P"
      hostname:                                            <computed>
      location:                                            "westus"
      name:                                                "${module.namespace.name}"
      port:                                                <computed>
      primary_access_key:                                  <computed>
      private_static_ip_address:                           <computed>
      redis_configuration.#:                               "1"
      redis_configuration.0.maxclients:                    <computed>
      redis_configuration.0.maxmemory_delta:               "200"
      redis_configuration.0.maxmemory_policy:              "volatile-lru"
      redis_configuration.0.maxmemory_reserved:            "200"
      redis_configuration.0.rdb_backup_enabled:            "true"
      redis_configuration.0.rdb_backup_frequency:          "30"
      redis_configuration.0.rdb_backup_max_snapshot_count: "1"
      redis_configuration.0.rdb_storage_connection_string: <sensitive>
      resource_group_name:                                 "${var.resource_group_name}"
      secondary_access_key:                                <computed>
      shard_count:                                         "1"
      sku_name:                                            "Premium"
      ssl_port:                                            <computed>
      tags.%:                                              <computed>

Actual Behavior

When I go to the Azure portal for my redis cache, the redis data persistance is turned off.

Steps to Reproduce

Simply perform the three-step terraform process of

1. terraform init
2. terraform plan
3. terraform apply [--auto-approve]

References

• Support backup settings for Premium azurerm_redis_cache #75: Support backup settings for Premium azurerm_redis_cache

[Dmitry1987]

for me the 'rdb_backup_max_snapshot_count' doesn't work, fails if I set it different from 1.
Any other number fails with

Error: Error issuing create request for Redis Cache redis-db-testing (resource group xxxxx): redis.Client#Create: Failure sending request: StatusCode=400 -- Original Error: Code="InvalidRequestBody" Message="The value of the parameter 'rdb-backup-max-snapshot-count' is invalid.\r\nRequestID=xxxxxxxxxx"

[AndresFPineros]

Any update on this? Should we even use this attribute?

[neil-yechenwei]

Thanks for opening this issue. After tested with below tfconfig and latest azurerm, seems I cannot repro this issue anymore. Could you have a try below tfconfig to check whether this issue still exists?

provider "azurerm" {
  features {}
}

resource "azurerm_resource_group" "test" {
  name     = "acctestRG-redisc-test10"
  location = "eastus2"
}

resource "azurerm_storage_account" "test" {
  name                     = "satest10neil"
  resource_group_name      = azurerm_resource_group.test.name
  location                 = azurerm_resource_group.test.location
  account_tier             = "Standard"
  account_replication_type = "GRS"

  tags = {
    environment = "staging"
  }
}

resource "azurerm_redis_cache" "test" {
  name                = "acctestRedis-test10"
  location            = azurerm_resource_group.test.location
  resource_group_name = azurerm_resource_group.test.name
  capacity            = 3
  family              = "P"
  sku_name            = "Premium"
  enable_non_ssl_port = false

  redis_configuration {
    rdb_backup_enabled            = true
    rdb_backup_frequency          = 60
    rdb_backup_max_snapshot_count = 1
    rdb_storage_connection_string = "DefaultEndpointsProtocol=https;BlobEndpoint=${azurerm_storage_account.test.primary_blob_endpoint};AccountName=${azurerm_storage_account.test.name};AccountKey=${azurerm_storage_account.test.primary_access_key}"
  }
}

[tombuildsstuff]

👋

Since we've not heard back here I'm going to close this issue for the moment - but please let us know if the solution proposed above doesn't work and we'll take another look.

Thanks!

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. If you feel I made an error 🤖 🙉 , please reach out to my human friends 👉 hashibot-feedback@hashicorp.com. Thanks!