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Cloud Posse

Terraform module to create an NLB and a default NLB target and related security groups.


This project is part of our comprehensive "SweetOps" approach towards DevOps.

Terraform Open Source Modules

It's 100% Open Source and licensed under the APACHE2.

We literally have hundreds of terraform modules that are Open Source and well-maintained. Check them out!

Security & Compliance

Security scanning is graciously provided by Bridgecrew. Bridgecrew is the leading fully hosted, cloud-native solution providing continuous Terraform security and compliance.

Benchmark Description
Infrastructure Security Infrastructure Security Compliance
CIS KUBERNETES Center for Internet Security, KUBERNETES Compliance
CIS AWS Center for Internet Security, AWS Compliance
CIS AZURE Center for Internet Security, AZURE Compliance
PCI-DSS Payment Card Industry Data Security Standards Compliance
NIST-800-53 National Institute of Standards and Technology Compliance
ISO27001 Information Security Management System, ISO/IEC 27001 Compliance
SOC2 Service Organization Control 2 Compliance
CIS GCP Center for Internet Security, GCP Compliance
HIPAA Health Insurance Portability and Accountability Compliance

Usage

IMPORTANT: We do not pin modules to versions in our examples because of the difficulty of keeping the versions in the documentation in sync with the latest released versions. We highly recommend that in your code you pin the version to the exact version you are using so that your infrastructure remains stable, and update versions in a systematic way so that they do not catch you by surprise.

Also, because of a bug in the Terraform registry (hashicorp/terraform#21417), the registry shows many of our inputs as required when in fact they are optional. The table below correctly indicates which inputs are required.

For a complete example, see examples/complete.

For automated test of the complete example using bats and Terratest, see test.

  provider "aws" {
    region = var.region
  }

  module "vpc" {
    source     = "git::https://github.com/cloudposse/terraform-aws-vpc.git?ref=tags/0.8.1"
    namespace  = var.namespace
    stage      = var.stage
    name       = var.name
    delimiter  = var.delimiter
    attributes = var.attributes
    cidr_block = var.vpc_cidr_block
    tags       = var.tags
  }

  module "subnets" {
    source               = "git::https://github.com/cloudposse/terraform-aws-dynamic-subnets.git?ref=tags/0.16.1"
    availability_zones   = var.availability_zones
    namespace            = var.namespace
    stage                = var.stage
    name                 = var.name
    attributes           = var.attributes
    delimiter            = var.delimiter
    vpc_id               = module.vpc.vpc_id
    igw_id               = module.vpc.igw_id
    cidr_block           = module.vpc.vpc_cidr_block
    nat_gateway_enabled  = false
    nat_instance_enabled = false
    tags                 = var.tags
  }

  module "nlb" {
    source = "cloudposse/nlb/aws"
    # Cloud Posse recommends pinning every module to a specific version
    # version = "x.x.x"
    namespace                               = var.namespace
    stage                                   = var.stage
    name                                    = var.name
    attributes                              = var.attributes
    delimiter                               = var.delimiter
    vpc_id                                  = module.vpc.vpc_id
    subnet_ids                              = module.subnets.public_subnet_ids
    internal                                = var.internal
    tcp_enabled                             = var.tcp_enabled
    access_logs_enabled                     = var.access_logs_enabled
    nlb_access_logs_s3_bucket_force_destroy = var.nlb_access_logs_s3_bucket_force_destroy
    access_logs_region                      = var.access_logs_region
    cross_zone_load_balancing_enabled       = var.cross_zone_load_balancing_enabled
    idle_timeout                            = var.idle_timeout
    ip_address_type                         = var.ip_address_type
    deletion_protection_enabled             = var.deletion_protection_enabled
    deregistration_delay                    = var.deregistration_delay
    health_check_path                       = var.health_check_path
    health_check_timeout                    = var.health_check_timeout
    health_check_healthy_threshold          = var.health_check_healthy_threshold
    health_check_unhealthy_threshold        = var.health_check_unhealthy_threshold
    health_check_interval                   = var.health_check_interval
    target_group_port                       = var.target_group_port
    target_group_target_type                = var.target_group_target_type
    tags                                    = var.tags
  }

Makefile Targets

Available targets:

  help                                Help screen
  help/all                            Display help for all targets
  help/short                          This help short screen
  lint                                Lint terraform code

Requirements

Name Version
terraform >= 0.13.0
aws >= 2.0
local >= 1.3
null >= 2.0
template >= 2.0

Providers

Name Version
aws >= 2.0

Inputs

Name Description Type Default Required
access_logs_enabled A boolean flag to enable/disable access_logs bool true no
access_logs_prefix The S3 log bucket prefix string "" no
access_logs_region The region for the access_logs S3 bucket string "us-east-1" no
additional_tag_map Additional tags for appending to tags_as_list_of_maps. Not added to tags. map(string) {} no
attributes Additional attributes (e.g. 1) list(string) [] no
certificate_arn The ARN of the default SSL certificate for HTTPS listener string "" no
context Single object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as null to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional_tag_map, which are merged.
any
{
"additional_tag_map": {},
"attributes": [],
"delimiter": null,
"enabled": true,
"environment": null,
"id_length_limit": null,
"label_key_case": null,
"label_order": [],
"label_value_case": null,
"name": null,
"namespace": null,
"regex_replace_chars": null,
"stage": null,
"tags": {}
}
no
cross_zone_load_balancing_enabled A boolean flag to enable/disable cross zone load balancing bool true no
deletion_protection_enabled A boolean flag to enable/disable deletion protection for NLB bool false no
delimiter Delimiter to be used between namespace, environment, stage, name and attributes.
Defaults to - (hyphen). Set to "" to use no delimiter at all.
string null no
deregistration_delay The amount of time to wait in seconds before changing the state of a deregistering target to unused number 15 no
enable_glacier_transition Enables the transition of lb logs to AWS Glacier bool true no
enabled Set to false to prevent the module from creating any resources bool null no
environment Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' string null no
expiration_days Number of days after which to expunge s3 logs number 90 no
glacier_transition_days Number of days after which to move s3 logs to the glacier storage tier number 60 no
health_check_enabled A boolean flag to enable/disable the NLB health checks bool true no
health_check_interval The duration in seconds in between health checks number 10 no
health_check_path The destination for the health check request string "/" no
health_check_port The port to send the health check request to (defaults to traffic-port) number null no
health_check_protocol The protocol to use for the health check request string null no
health_check_threshold The number of consecutive health checks successes required before considering an unhealthy target healthy, or failures required before considering a health target unhealthy number 2 no
id_length_limit Limit id to this many characters (minimum 6).
Set to 0 for unlimited length.
Set to null for default, which is 0.
Does not affect id_full.
number null no
internal A boolean flag to determine whether the NLB should be internal bool false no
ip_address_type The type of IP addresses used by the subnets for your load balancer. The possible values are ipv4 and dualstack. string "ipv4" no
label_key_case The letter case of label keys (tag names) (i.e. name, namespace, environment, stage, attributes) to use in tags.
Possible values: lower, title, upper.
Default value: title.
string null no
label_order The naming order of the id output and Name tag.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 5 elements, but at least one must be present.
list(string) null no
label_value_case The letter case of output label values (also used in tags and id).
Possible values: lower, title, upper and none (no transformation).
Default value: lower.
string null no
lifecycle_rule_enabled A boolean that indicates whether the s3 log bucket lifecycle rule should be enabled. bool false no
name Solution name, e.g. 'app' or 'jenkins' string null no
namespace Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' string null no
nlb_access_logs_s3_bucket_force_destroy A boolean that indicates all objects should be deleted from the NLB access logs S3 bucket so that the bucket can be destroyed without error bool false no
noncurrent_version_expiration_days Specifies when noncurrent s3 log versions expire number 90 no
noncurrent_version_transition_days Specifies when noncurrent s3 log versions transition number 30 no
regex_replace_chars Regex to replace chars with empty string in namespace, environment, stage and name.
If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits.
string null no
stage Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' string null no
standard_transition_days Number of days to persist logs in standard storage tier before moving to the infrequent access tier number 30 no
subnet_ids A list of subnet IDs to associate with NLB list(string) n/a yes
tags Additional tags (e.g. map('BusinessUnit','XYZ') map(string) {} no
target_group_additional_tags The additional tags to apply to the default target group map(string) {} no
target_group_name The name for the default target group, uses a module label name if left empty string "" no
target_group_port The port for the default target group number 80 no
target_group_target_type The type (instance, ip or lambda) of targets that can be registered with the default target group string "ip" no
tcp_enabled A boolean flag to enable/disable TCP listener bool true no
tcp_port The port for the TCP listener number 80 no
tls_enabled A boolean flag to enable/disable TLS listener bool false no
tls_port The port for the TLS listener number 443 no
tls_ssl_policy The name of the SSL Policy for the listener string "ELBSecurityPolicy-2016-08" no
udp_enabled A boolean flag to enable/disable UDP listener bool false no
udp_port The port for the UDP listener number 53 no
vpc_id VPC ID to associate with NLB string n/a yes

Outputs

Name Description
access_logs_bucket_id The S3 bucket ID for access logs
default_listener_arn The ARN of the default listener
default_target_group_arn The default target group ARN
listener_arns A list of all the listener ARNs
nlb_arn The ARN of the NLB
nlb_arn_suffix The ARN suffix of the NLB
nlb_dns_name DNS name of NLB
nlb_name The ARN suffix of the NLB
nlb_zone_id The ID of the zone which NLB is provisioned
tls_listener_arn The ARN of the TLS listener

Help

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In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.

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NOTE: Be sure to merge the latest changes from "upstream" before making a pull request!

Copyright

Copyright © 2017-2021 Cloud Posse, LLC

License

License

See LICENSE for full details.

Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

  https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.

Trademarks

All other trademarks referenced herein are the property of their respective owners.

About

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Contributors

Erik Osterman
Erik Osterman
Igor Rodionov
Igor Rodionov
Andriy Knysh
Andriy Knysh
Sarkis Varozian
Sarkis Varozian

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Terraform module to provision a standard NLB for TCP/UDP/TLS traffic https://cloudposse.com/accelerate

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