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alicloud_alb_rule

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Provides a Application Load Balancer (ALB) Rule resource.

For information about Application Load Balancer (ALB) Rule and how to use it, see What is Rule.

-> NOTE: Available since v1.133.0.

-> NOTE: This version only supports forwarding rules in the request direction.

Example Usage

Basic Usage


variable "name" {
  default = "tf_example"
}

data "alicloud_alb_zones" "default" {
}

data "alicloud_resource_manager_resource_groups" "default" {
}

resource "alicloud_vpc" "default" {
  vpc_name   = var.name
  cidr_block = "10.4.0.0/16"
}

resource "alicloud_vswitch" "default" {
  count        = 2
  vpc_id       = alicloud_vpc.default.id
  cidr_block   = format("10.4.%d.0/24", count.index + 1)
  zone_id      = data.alicloud_alb_zones.default.zones[count.index].id
  vswitch_name = format("${var.name}_%d", count.index + 1)
}

resource "alicloud_alb_load_balancer" "default" {
  vpc_id                 = alicloud_vpc.default.id
  address_type           = "Internet"
  address_allocated_mode = "Fixed"
  load_balancer_name     = var.name
  load_balancer_edition  = "Standard"
  resource_group_id      = data.alicloud_resource_manager_resource_groups.default.groups.0.id
  load_balancer_billing_config {
    pay_type = "PayAsYouGo"
  }
  tags = {
    Created = "TF"
  }
  zone_mappings {
    vswitch_id = alicloud_vswitch.default.0.id
    zone_id    = data.alicloud_alb_zones.default.zones.0.id
  }
  zone_mappings {
    vswitch_id = alicloud_vswitch.default.1.id
    zone_id    = data.alicloud_alb_zones.default.zones.1.id
  }
}

resource "alicloud_alb_server_group" "default" {
  protocol          = "HTTP"
  vpc_id            = alicloud_vpc.default.id
  server_group_name = var.name
  resource_group_id = data.alicloud_resource_manager_resource_groups.default.groups.0.id
  health_check_config {
    health_check_enabled = "false"
  }
  sticky_session_config {
    sticky_session_enabled = "false"
  }
  tags = {
    Created = "TF"
  }
}

resource "alicloud_alb_listener" "default" {
  load_balancer_id     = alicloud_alb_load_balancer.default.id
  listener_protocol    = "HTTP"
  listener_port        = 80
  listener_description = var.name
  default_actions {
    type = "ForwardGroup"
    forward_group_config {
      server_group_tuples {
        server_group_id = alicloud_alb_server_group.default.id
      }
    }
  }
}

resource "alicloud_alb_rule" "default" {
  rule_name   = var.name
  listener_id = alicloud_alb_listener.default.id
  priority    = "555"
  rule_conditions {
    cookie_config {
      values {
        key   = "created"
        value = "tf"
      }
    }
    type = "Cookie"
  }

  rule_actions {
    forward_group_config {
      server_group_tuples {
        server_group_id = alicloud_alb_server_group.default.id
      }
    }
    order = "9"
    type  = "ForwardGroup"
  }
}

Argument Reference

The following arguments are supported:

  • listener_id - (Required, ForceNew) The ID of the listener to which the forwarding rule belongs.
  • rule_name - (Required) The name of the forwarding rule. The name must be 2 to 128 characters in length, and can contain letters, digits, periods (.), underscores (_), and hyphens (-). The name must start with a letter.
  • priority - (Required, Int) The priority of the rule. Valid values: 1 to 10000. A smaller value indicates a higher priority. Note: The priority of each rule within the same listener must be unique.
  • direction - (Optional, ForceNew, Available since v1.205.0) The direction to which the forwarding rule is applied. Default value: Request. Valid values:
    • Request: The forwarding rule is applied to the client requests received by ALB.
    • Response: The forwarding rule is applied to the responses returned by backend servers.
  • dry_run - (Optional, Bool) Specifies whether to precheck this request.
  • rule_actions - (Required, Set) The actions of the forwarding rules. See rule_actions below.
  • rule_conditions - (Required, Set) The conditions of the forwarding rule. See rule_conditions below.

rule_actions

The rule_actions supports the following:

  • order - (Required, Int) The order of the forwarding rule actions. Valid values: 1 to 50000. The actions are performed in ascending order. You cannot leave this parameter empty. Each value must be unique.
  • type - (Required) The action type. Valid values: ForwardGroup, Redirect, FixedResponse, Rewrite, InsertHeader, RemoveHeader, TrafficLimit, TrafficMirror and Cors. Note: The preceding actions can be classified into two types: FinalType: A forwarding rule can contain only one FinalType action, which is executed last. This type of action can contain only one ForwardGroup, Redirect or FixedResponse action. ExtType: A forwarding rule can contain one or more ExtType actions, which are executed before FinalType actions and need to coexist with the FinalType actions. This type of action can contain multiple InsertHeader actions or one Rewrite action. NOTE: The TrafficLimit and TrafficMirror option is available since 1.162.0. NOTE: From version 1.205.0, type can be set to Cors.
  • fixed_response_config - (Optional, Set) The configuration of the fixed response. See fixed_response_config below.
  • forward_group_config - (Optional, Set) The forward response action within ALB. See forward_group_config below.
  • insert_header_config - (Optional, Set) The configuration of the inserted header field. See insert_header_config below.
  • remove_header_config - (Optional, Set) The configuration of the inserted header field. See remove_header_config below.
  • redirect_config - (Optional, Set) The configuration of the external redirect action. See redirect_config below.
  • rewrite_config - (Optional, Set) The redirect action within ALB. See rewrite_config below.
  • traffic_limit_config - (Optional, Set, Available since v1.162.0) The Flow speed limit. See traffic_limit_config below.
  • traffic_mirror_config - (Optional, Set, Available since v1.162.0) The Traffic mirroring. See traffic_mirror_config below.
  • cors_config - (Optional, Set, Available since v1.205.0) Request forwarding based on CORS. See cors_config below.

rule_actions-fixed_response_config

The fixed_response_config supports the following:

  • content - (Required) The fixed response. The response cannot exceed 1 KB in size and can contain only ASCII characters.
  • content_type - (Optional) The format of the fixed response. Valid values: text/plain, text/css, text/html, application/javascript, and application/json.
  • http_code - (Optional) The HTTP status code of the response. The code must be an HTTP_2xx, HTTP_4xx or HTTP_5xx.x is a digit.

rule_actions-forward_group_config

The forward_group_config supports the following:

  • server_group_tuples - (Optional, Set) The destination server group to which requests are forwarded. See server_group_tuples below.
  • server_group_sticky_session - (Optional, Set, Available since v1.179.0) The configuration of session persistence for server groups. See server_group_sticky_session below.

rule_actions-forward_group_config-server_group_tuples

The server_group_tuples supports the following:

  • server_group_id - (Optional) The ID of the destination server group to which requests are forwarded.
  • weight - (Optional, Int, Available since v1.162.0) The Weight of server group. Default value: 100. NOTE: This attribute is required when the number of server_group_tuples is greater than 2.

rule_actions-forward_group_config-server_group_sticky_session

The server_group_sticky_session supports the following:

  • enabled - (Optional, Bool, Available since v1.179.0) Whether to enable session persistence.
  • timeout - (Optional, Int, Available since v1.179.0) The timeout period. Unit: seconds. Valid values: 1 to 86400. Default value: 1000.

rule_actions-insert_header_config

The insert_header_config supports the following:

  • key - (Optional) The name of the inserted header field. The name must be 1 to 40 characters in length, and can contain letters, digits, underscores (_), and hyphens (-). You cannot use the same name in InsertHeader. Note You cannot use Cookie or Host in the name.
  • value - (Optional) The content of the inserted header field. Valid values:
    • If the value_type is set to SystemDefined, the following values are used:
      • ClientSrcPort: the port of the client.
      • ClientSrcIp: the IP address of the client.
      • Protocol: the protocol used by client requests (HTTP or HTTPS).
      • SLBId: the ID of the ALB instance.
      • SLBPort: the listener port of the ALB instance.
    • If the value_type is set to UserDefined, the value must be 1 to 128 characters in length, and can contain lowercase letters, printable characters whose ASCII value is ch >= 32 && ch < 127, and wildcards such as asterisks (*) and question marks (?). The header value cannot start or end with a space.
    • If the value_type is set to ReferenceHeader, the value must be 1 to 128 characters in length, and can contain lowercase letters, digits, underscores (_), and hyphens (-).
  • value_type - (Optional) The value type of the inserted header field. Valid values:
    • UserDefined: a custom value
    • ReferenceHeader: uses a field of the user request header.
    • SystemDefined: a system value.

rule_actions-remove_header_config

The remove_header_config supports the following:

  • key - (Optional) The name of the removed header field. It can be 1 to 40 characters in length and supports upper and lower case letters a to z, numbers, underscores (_), and dashes (-). Header field names cannot be used repeatedly in RemoveHeader.
    • Request Direction: The header name cannot be set to the following fields (case insensitive):slb-id, slb-ip, x-forwarded-for, x-forwarded-proto, x-forwarded-eip, x-forwarded-port, x-forwarded-client-srcport, connection, upgrade, content-length, transfer-encoding, keep-alive, te, host, cookie, remoteip, and authority.
    • Response Direction: The header name cannot be set to the following fields (case insensitive):connection, upgrade, content-length, transfer-encoding.

rule_actions-redirect_config

The redirect_config supports the following:

  • host - (Optional) The host name of the destination to which requests are directed. The host name must meet the following rules: The host name must be 3 to 128 characters in length, and can contain letters, digits, hyphens (-), periods (.), asterisks (), and question marks (?). The host name must contain at least one period (.), and cannot start or end with a period (.). The rightmost domain label can contain only letters, asterisks () and question marks (?) and cannot contain digits or hyphens (-). Other domain labels cannot start or end with a hyphen (-). You can include asterisks (*) and question marks (?) anywhere in a domain label. Default value: ${host}. You cannot use this value with other characters at the same time.
  • http_code - (Optional) The redirect method. Valid values: 301, 302, 303, 307, and 308.
  • path - (Optional) The path of the destination to which requests are directed. Valid values: The path must be 1 to 128 characters in length, and start with a forward slash (/). The path can contain letters, digits, asterisks (*), question marks (?) and the following special characters: $ - _ . + / & ~ @ :. It cannot contain the following special characters: " % # ; ! ( ) [ ] ^ , ”. The path is case-sensitive. Default value: ${path}. You can also reference ${host}, ${protocol}, and ${port}. Each variable can appear at most once. You can use the preceding variables at the same time, or use them with a valid string.
  • port - (Optional) The port of the destination to which requests are redirected. Valid values: 1 to 63335. Default value: ${port}. You cannot use this value together with other characters at the same time.
  • protocol - (Optional) The protocol of the requests to be redirected. Valid values: HTTP and HTTPS. Default value: ${protocol}. You cannot use this value together with other characters at the same time. Note HTTPS listeners can redirect only HTTPS requests.
  • query - (Optional) The query string of the request to be redirected. The query string must be 1 to 128 characters in length, can contain letters and printable characters. It cannot contain the following special characters: # [ ] { } \ | < > &. Default value: ${query}. You can also reference ${host}, ${protocol}, and ${port}. Each variable can appear at most once. You can use the preceding variables at the same time, or use them together with a valid string.

rule_actions-rewrite_config

The rewrite_config supports the following:

  • host - (Optional) The host name of the destination to which requests are redirected within ALB. Valid values: The host name must be 3 to 128 characters in length, and can contain letters, digits, hyphens (-), periods (.), asterisks (), and question marks (?). The host name must contain at least one period (.), and cannot start or end with a period (.). The rightmost domain label can contain only letters, asterisks () and question marks (?) and cannot contain digits or hyphens (-). Other domain labels cannot start or end with a hyphen (-). You can include asterisks (*) and question marks (?) anywhere in a domain label. Default value: ${host}. You cannot use this value with other characters at the same time.
  • path - (Optional) The path to which requests are to be redirected within ALB. Valid values: The path must be 1 to 128 characters in length, and start with a forward slash (/). The path can contain letters, digits, asterisks (*), question marks (?)and the following special characters: $ - _ . + / & ~ @ :. It cannot contain the following special characters: " % # ; ! ( ) [ ] ^ , ”. The path is case-sensitive. Default value: ${path}. This value can be used only once. You can use it with a valid string.
  • query - (Optional) The query string of the request to be redirected within ALB. The query string must be 1 to 128 characters in length, can contain letters and printable characters. It cannot contain the following special characters: # [ ] { } \ | < > &. Default value: ${query}. This value can be used only once. You can use it with a valid string.

rule_actions-traffic_limit_config

The traffic_limit_config supports the following:

  • qps - (Optional, Int) The Number of requests per second. Valid values: 1 to 100000.
  • per_ip_qps - (Optional, Int) The number of requests per second for a single IP address. Value range: 1~1000000. Note: If the QPS parameter is also configured, the value of the PerIpQps parameter must be smaller than the value of the QPS parameter.

rule_actions-traffic_mirror_config

The traffic_mirror_config supports the following:

  • target_type - (Optional) The Mirror target type.
  • mirror_group_config - (Optional, Set) The Traffic is mirrored to the server group. See mirror_group_config below.

rule_actions-traffic_mirror_config-mirror_group_config

The mirror_group_config supports the following:

  • server_group_tuples - (Optional, Set) The destination server group to which requests are forwarded. See server_group_tuples below.

rule_actions-traffic_mirror_config-mirror_group_config-server_group_tuples

The server_group_tuples supports the following:

  • server_group_id - (Optional) The ID of the destination server group to which requests are forwarded.

rule_actions-cors_config

The cors_config supports the following:

  • allow_origin - (Optional, List) The allowed origins of CORS requests.
  • allow_methods - (Optional, List) The allowed HTTP methods for CORS requests. Valid values: GET, POST, PUT, DELETE, HEAD, OPTIONS, PATCH.
  • allow_headers - (Optional, List) The allowed headers for CORS requests.
  • expose_headers - (Optional, List) The headers that can be exposed.
  • allow_credentials - (Optional) Specifies whether credentials can be passed during CORS operations. Valid values: on, off.
  • max_age - (Optional, Int) The maximum cache time of preflight requests in the browser. Unit: seconds. Valid values: -1 to 172800.

rule_conditions

The rule_conditions supports the following:

  • type - (Required) The type of the forwarding rule. Valid values:
    • Host: Requests are forwarded based on hosts.
    • Path: Requests are forwarded based on the path.
    • Header: Requests are forwarded based on the HTTP header field.
    • QueryString: Requests are forwarded based on the query string.
    • Method: Request are forwarded based on the request method.
    • Cookie: Requests are forwarded based on the cookie.
    • SourceIp: Requests are forwarded based on the source ip. NOTE: The SourceIp option is available since 1.162.0.
    • ResponseHeader: Response header. NOTE: The SourceIp option is available since 1.213.1.
    • ResponseStatusCode: Response status code. NOTE: The SourceIp option is available since 1.213.1.
  • cookie_config - (Optional, Set) The configuration of the cookie. See See cookie_config below.
  • header_config - (Optional, Set) The configuration of the header field. See header_config below.
  • response_header_config - (Optional, Set) The configuration of the header field. See response_header_config below.
  • response_status_code_config - (Optional, Set) The configuration of the header field. See response_status_code_config below.
  • host_config - (Optional, Set) The configuration of the host field. See host_config below.
  • method_config - (Optional, Set) The configuration of the request method. See method_config below.
  • path_config - (Optional, Set) The configuration of the path for the request to be forwarded. See path_config below.
  • query_string_config - (Optional, Set) The configuration of the query string. See query_string_config below.
  • source_ip_config - (Optional, Set, Available since v1.162.0) The Based on source IP traffic matching. Required and valid when Type is SourceIP. See source_ip_config below.

The cookie_config supports the following:

  • values - (Optional, Set) The values of the cookie. See values below.

The values supports the following:

  • key - (Optional) The key of the cookie.
  • value - (Optional) The value of the cookie.

rule_conditions-header_config

The header_config supports the following:

  • key - (Optional) The key of the header field. The key must be 1 to 40 characters in length, and can contain letters, digits, hyphens (-) and underscores (_). The key does not support Cookie or Host.
  • values - (Optional, List) The value of the header field. The value must be 1 to 128 characters in length, and can contain lowercase letters, printable ASCII characters whose values are ch >= 32 && ch < 127, asterisks (*), and question marks (?). The value cannot start or end with a space.

rule_conditions-response_header_config

The response_header_config supports the following:

  • key - (Optional) The key of the header field. The key must be 1 to 40 characters in length, and can contain letters, digits, hyphens (-) and underscores (_). The key does not support Cookie or Host.
  • values - (Optional, List) The value of the header field. The value must be 1 to 128 characters in length, and can contain lowercase letters, printable ASCII characters whose values are ch >= 32 && ch < 127, asterisks (*), and question marks (?). The value cannot start or end with a space.

rule_conditions-response_status_code_config

The response_status_code_config supports the following:

  • values - (Optional, List) Response status code list.

rule_conditions-host_config

The host_config supports the following:

  • values - (Optional, List) The name of the host. **Note: ** The host name must meet the following rules: The hostname must be 3 to 128 characters in length, and can contain lowercase letters, digits, hyphens (-), periods (.), asterisks (), and question marks (?). The host name must contain at least one period (.), and cannot start or end with a period (.). The rightmost field can contain only letters and wildcards, and cannot contain digits or hyphens (-). Other fields cannot start or end with a hyphen (-). You can enter asterisks () and question marks (?) anywhere in a field.

rule_conditions-method_config

The method_config supports the following:

  • values - (Optional, List) The request method. Valid values: HEAD, GET, POST, OPTIONS, PUT, PATCH, and DELETE.

rule_conditions-path_config

The path_config supports the following:

  • values - (Optional, List) The path of the request to be forwarded. The path must be 1 to 128 characters in length and must start with a forward slash (/). The path can contain letters, digits, and the following special characters: $ - _ . + / & ~ @ :. It cannot contain the following special characters: " % # ; ! ( ) [ ] ^ , ". The value is case-sensitive, and can contain asterisks (*) and question marks (?).

rule_conditions-query_string_config

The query_string_config supports the following:

  • values - (Optional, Set) The query string. See values below.

rule_conditions-query_string_config-values

The values supports the following:

  • key - (Optional) The key must be 1 to 100 characters in length, and can contain lowercase letters, printable characters, asterisks (*), and question marks (?). The key cannot contain spaces or the following special characters: # [ ] { } \ | < > &.
  • value - (Optional) The value must be 1 to 128 characters in length, and can contain lowercase letters, printable characters, asterisks (*), and question marks (?). The value cannot contain spaces or the following special characters: # [ ] { } \ | < > &.

rule_conditions-source_ip_config

The source_ip_config supports the following:

  • values - (Optional, List) Add one or more IP addresses or IP address segments. You can add up to 5 forwarding rules in a SourceIp.

Attributes Reference

The following attributes are exported:

  • id - The resource ID in terraform of Rule.
  • status - The status of the resource.

Timeouts

The timeouts block allows you to specify timeouts for certain actions:

  • create - (Defaults to 2 mins) Used when create the Rule.
  • update - (Defaults to 2 mins) Used when update the Rule.
  • delete - (Defaults to 2 mins) Used when delete the Rule.

Import

Application Load Balancer (ALB) Rule can be imported using the id, e.g.

$ terraform import alicloud_alb_rule.example <id>