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README.md

Google Cloud VPC Firewall Rules

This module allows creation of custom VPC firewall rules.

Usage

Variable rules details are available here. Basic usage of this module is as follows:

module "firewall_rules" {
  source       = "terraform-google-modules/network/google//modules/firewall-rules"
  project_id   = var.project_id
  network_name = module.vpc.network_name

  rules = [{
    name                    = "allow-ssh-ingress"
    description             = null
    direction               = "INGRESS"
    priority                = null
    destination_ranges      = ["10.0.0.0/8"]
    source_ranges           = ["0.0.0.0/0"]
    source_tags             = null
    source_service_accounts = null
    target_tags             = null
    target_service_accounts = null
    allow = [{
      protocol = "tcp"
      ports    = ["22"]
    }]
    deny = []
    log_config = {
      metadata = "INCLUDE_ALL_METADATA"
    }
  }]
}

Inputs

Name Description Type Default Required
egress_rules List of egress rules. This will be ignored if variable 'rules' is non-empty 
list(object({
    name                    = string
    description             = optional(string, null)
    disabled                = optional(bool, null)
    priority                = optional(number, null)
    destination_ranges      = optional(list(string), [])
    source_ranges           = optional(list(string), [])
    source_tags             = optional(list(string))
    source_service_accounts = optional(list(string))
    target_tags             = optional(list(string))
    target_service_accounts = optional(list(string))

    allow = optional(list(object({
      protocol = string
      ports    = optional(list(string))
    })), [])
    deny = optional(list(object({
      protocol = string
      ports    = optional(list(string))
    })), [])
    log_config = optional(object({
      metadata = string
    }))
  }))
 [] no
ingress_rules List of ingress rules. This will be ignored if variable 'rules' is non-empty 
list(object({
    name                    = string
    description             = optional(string, null)
    disabled                = optional(bool, null)
    priority                = optional(number, null)
    destination_ranges      = optional(list(string), [])
    source_ranges           = optional(list(string), [])
    source_tags             = optional(list(string))
    source_service_accounts = optional(list(string))
    target_tags             = optional(list(string))
    target_service_accounts = optional(list(string))

    allow = optional(list(object({
      protocol = string
      ports    = optional(list(string))
    })), [])
    deny = optional(list(object({
      protocol = string
      ports    = optional(list(string))
    })), [])
    log_config = optional(object({
      metadata = string
    }))
  }))
 [] no
network_name Name of the network this set of firewall rules applies to. string n/a yes
project_id Project id of the project that holds the network. string n/a yes
rules This is DEPRICATED and available for backward compatiblity. Use ingress_rules and egress_rules variables. List of custom rule definitions 
list(object({
    name                    = string
    description             = optional(string, null)
    direction               = optional(string, "INGRESS")
    disabled                = optional(bool, null)
    priority                = optional(number, null)
    ranges                  = optional(list(string), [])
    source_tags             = optional(list(string))
    source_service_accounts = optional(list(string))
    target_tags             = optional(list(string))
    target_service_accounts = optional(list(string))

    allow = optional(list(object({
      protocol = string
      ports    = optional(list(string))
    })), [])
    deny = optional(list(object({
      protocol = string
      ports    = optional(list(string))
    })), [])
    log_config = optional(object({
      metadata = string
    }))
  }))
 [] no

Outputs

Name Description
firewall_rules The created firewall rule resources
firewall_rules_ingress_egress The created firewall ingress/egress rule resources

rules

In a firewall rule, you specify a set of components that define what the rule does. Some of the values are optional and some have default value. For sample code check firewall rules in examples folder. variable rule.ranges is kept for backward compatibility and should not be set at the same time as rule.destination_ranges OR rule.source_ranges otherwise module will generate an error message ranges may not be set at the same time as destination_ranges OR source_ranges.

  • ranges: IP address range. This may not be set at the same time as destination_ranges OR source_ranges.
  • source_ranges: (Optional) If source ranges are specified, the firewall will apply only to traffic that has source IP address in these ranges. These ranges must be expressed in CIDR format. source_ranges may not be set at the same time as ranges
  • destination_ranges: (Optional) If destination ranges are specified, the firewall will apply only to traffic that has destination IP address in these ranges. These ranges must be expressed in CIDR format. destination_ranges may not be set at the same time as ranges
  • name: (Required) Name of the resource. Provided by the client when the resource is created. The name must be 1-63 characters long, the first character must be a lowercase letter, and all following characters must be a dash, lowercase letter, or digit, except the last character, which cannot be a dash.
  • description: (Optional) An optional description of this resource. Provide this property when you create the resource
  • direction: (Optional) Direction of traffic to which this firewall applies; default is INGRESS
  • priority: (Optional) Priority for this rule. This is an integer between 0 and 65535, both inclusive. When not specified, the value assumed is 1000