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feat: (IAC-276) Support Azure Application Gateway with Azure WAF
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| Original file line number | Diff line number | Diff line change |
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| # Copyright © 2020-2023, SAS Institute Inc., Cary, NC, USA. All Rights Reserved. | ||
| # SPDX-License-Identifier: Apache-2.0 | ||
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| ## https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/application_gateway | ||
| ## https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/web_application_firewall_policy | ||
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| locals { | ||
| backend_address_pool_name = "${var.prefix}-backend-pool" | ||
| frontend_port_name = "${var.prefix}-frontend-port" | ||
| frontend_ip_configuration_name = "${var.prefix}-frontend-ip" | ||
| http_setting_name = "${var.prefix}-backend-setting" | ||
| listener_name = "${var.prefix}-listener" | ||
| request_routing_rule_name = "${var.prefix}-routing-rule" | ||
| } | ||
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| resource "azurerm_public_ip" "gateway_ip" { | ||
| name = "${var.prefix}-gateway-public_ip" | ||
| location = var.location | ||
| resource_group_name = var.resource_group_name | ||
| allocation_method = "Static" | ||
| sku = "Standard" | ||
| domain_name_label = var.backend_host_name == null ? "${var.prefix}-appgateway" : null | ||
| tags = var.tags | ||
| } | ||
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| resource "azurerm_web_application_firewall_policy" "waf_policy" { | ||
| count = var.waf_policy_enabled ? 1 : 0 | ||
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| name = "${var.prefix}-waf-policy" | ||
| resource_group_name = var.resource_group_name | ||
| location = var.location | ||
| tags = var.tags | ||
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| dynamic "custom_rules" { | ||
| for_each = var.waf_policy_config.custom_rules | ||
| content { | ||
| name = custom_rules.value.name | ||
| priority = custom_rules.value.priority | ||
| rule_type = custom_rules.value.rule_type | ||
| action = custom_rules.value.action | ||
| dynamic "match_conditions" { | ||
| for_each = custom_rules.value.match_conditions | ||
| content { | ||
| operator = match_conditions.value.operator | ||
| negation_condition = match_conditions.value.negation_condition | ||
| match_values = match_conditions.value.match_values | ||
| dynamic "match_variables" { | ||
| for_each = match_conditions.value.match_variables | ||
| content { | ||
| variable_name = match_variables.value.variable_name | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| dynamic "policy_settings" { | ||
| for_each = var.waf_policy_config.policy_settings != null ? [var.waf_policy_config.policy_settings] : [] | ||
| content { | ||
| enabled = policy_settings.value.enabled | ||
| mode = policy_settings.value.mode | ||
| request_body_check = policy_settings.value.request_body_check | ||
| file_upload_limit_in_mb = policy_settings.value.file_upload_limit_in_mb | ||
| max_request_body_size_in_kb = policy_settings.value.max_request_body_size_in_kb | ||
| } | ||
| } | ||
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| managed_rules { | ||
| dynamic "exclusion" { | ||
| for_each = var.waf_policy_config.managed_rules.exclusion | ||
| content { | ||
| match_variable = exclusion.value.match_variable | ||
| selector = exclusion.value.selector | ||
| selector_match_operator = exclusion.value.selector_match_operator | ||
| dynamic "excluded_rule_set" { | ||
| for_each = exclusion.value.excluded_rule_set | ||
| content { | ||
| type = excluded_rule_set.value.type | ||
| version = excluded_rule_set.value.version | ||
| dynamic "rule_group" { | ||
| for_each = excluded_rule_set.value.rule_group | ||
| content { | ||
| rule_group_name = rule_group.value.rule_group_name | ||
| excluded_rules = rule_group.value.excluded_rules | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| dynamic "managed_rule_set" { | ||
| for_each = var.waf_policy_config.managed_rules.managed_rule_set | ||
| content { | ||
| type = managed_rule_set.value.type | ||
| version = managed_rule_set.value.version | ||
| dynamic "rule_group_override" { | ||
| for_each = managed_rule_set.value.rule_group_override | ||
| content { | ||
| rule_group_name = rule_group_override.value.rule_group_name | ||
| dynamic "rule" { | ||
| for_each = rule_group_override.value.rule | ||
| content { | ||
| id = rule.value.id | ||
| enabled = rule.value.enabled | ||
| action = rule.value.action | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| resource "azurerm_application_gateway" "appgateway" { | ||
| name = "${var.prefix}-appgateway" | ||
| resource_group_name = var.resource_group_name | ||
| location = var.location | ||
| firewall_policy_id = var.waf_policy_enabled ? azurerm_web_application_firewall_policy.waf_policy[0].id : null | ||
| force_firewall_policy_association = var.waf_policy_enabled ? true : false | ||
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| sku { | ||
| name = var.waf_policy_enabled ? "WAF_v2" : var.sku | ||
| tier = var.waf_policy_enabled ? "WAF_v2" : "Standard_v2" | ||
| capacity = 2 | ||
| } | ||
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| gateway_ip_configuration { | ||
| name = "${var.prefix}-gateway-ip-configuration" | ||
| subnet_id = var.subnet_id | ||
| } | ||
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| frontend_port { | ||
| name = local.frontend_port_name | ||
| port = var.port | ||
| } | ||
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| frontend_ip_configuration { | ||
| name = local.frontend_ip_configuration_name | ||
| public_ip_address_id = azurerm_public_ip.gateway_ip.id | ||
| } | ||
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| backend_address_pool { | ||
| name = local.backend_address_pool_name | ||
| fqdns = var.backend_address_pool_fqdn != null ? length(var.backend_address_pool_fqdn) != 0 ? var.backend_address_pool_fqdn : null : null | ||
| } | ||
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| dynamic "trusted_root_certificate" { | ||
| for_each = var.backend_trusted_root_certificate == null ? [] : [1] | ||
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| content { | ||
| name = "root-cert" | ||
| data = filebase64(var.backend_trusted_root_certificate) | ||
| } | ||
| } | ||
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| dynamic "ssl_certificate" { | ||
| for_each = var.ssl_certificate == null ? [] : var.ssl_certificate | ||
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| content { | ||
| name = "ListenerCert" | ||
| data = ssl_certificate.value.data != null ? filebase64(ssl_certificate.value.data) : null | ||
| password = ssl_certificate.value.password | ||
| key_vault_secret_id = ssl_certificate.value.data != null ? null : ssl_certificate.value.key_vault_secret_id | ||
| } | ||
| } | ||
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| backend_http_settings { | ||
| name = local.http_setting_name | ||
| cookie_based_affinity = "Disabled" | ||
| port = var.port | ||
| protocol = var.protocol | ||
| request_timeout = 60 | ||
| probe_name = var.probe != null ? "default-probe" : null | ||
| host_name = var.backend_host_name == null ? azurerm_public_ip.gateway_ip.fqdn : var.backend_host_name | ||
| trusted_root_certificate_names = var.backend_trusted_root_certificate == null ? null : ["root-cert"] | ||
| } | ||
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| http_listener { | ||
| name = local.listener_name | ||
| frontend_ip_configuration_name = local.frontend_ip_configuration_name | ||
| frontend_port_name = local.frontend_port_name | ||
| protocol = var.protocol | ||
| ssl_certificate_name = var.ssl_certificate == null ? null : "ListenerCert" | ||
| } | ||
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| request_routing_rule { | ||
| name = local.request_routing_rule_name | ||
| rule_type = "Basic" | ||
| http_listener_name = local.listener_name | ||
| backend_address_pool_name = local.backend_address_pool_name | ||
| backend_http_settings_name = local.http_setting_name | ||
| priority = 1 | ||
| } | ||
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| dynamic "probe" { | ||
| for_each = var.probe != null ? var.probe : [] | ||
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| content { | ||
| name = probe.value.name | ||
| interval = 60 | ||
| protocol = var.protocol | ||
| path = probe.value.path | ||
| timeout = 30 | ||
| unhealthy_threshold = 3 | ||
| pick_host_name_from_backend_http_settings = true | ||
| } | ||
| } | ||
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| tags = var.tags | ||
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| depends_on = [azurerm_web_application_firewall_policy.waf_policy] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| # Copyright © 2020-2023, SAS Institute Inc., Cary, NC, USA. All Rights Reserved. | ||
| # SPDX-License-Identifier: Apache-2.0 | ||
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| output "gateway_frontend_ip" { | ||
| value = azurerm_public_ip.gateway_ip.ip_address | ||
| } |
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