├── .editorconfig ├── .gitignore ├── .mailmap ├── .markdownlint.json ├── .vscode └── extensions.json ├── AUTHORS.md ├── CHANGELOG.md ├── CONTRIBUTING.md ├── LICENSE ├── README.md ├── main.tf ├── outputs.tf ├── variables.tf └── versions.tf /.editorconfig: -------------------------------------------------------------------------------- 1 | root = true 2 | 3 | [*] 4 | charset = utf-8 5 | insert_final_newline = true 6 | trim_trailing_whitespace = true 7 | 8 | [*.{json,tf}] 9 | indent_style = space 10 | indent_size = 2 11 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | /.terraform/ 2 | *.tfstate* 3 | *.auto.tfvars 4 | -------------------------------------------------------------------------------- /.mailmap: -------------------------------------------------------------------------------- 1 | Benjamin P. Jung 2 | -------------------------------------------------------------------------------- /.markdownlint.json: -------------------------------------------------------------------------------- 1 | { 2 | "line-length": false, 3 | "no-duplicate-heading": false 4 | } 5 | -------------------------------------------------------------------------------- /.vscode/extensions.json: -------------------------------------------------------------------------------- 1 | { 2 | "recommendations": [ 3 | "davidanson.vscode-markdownlint", 4 | "editorconfig.editorconfig", 5 | "mauve.terraform" 6 | 7 | ] 8 | } 9 | -------------------------------------------------------------------------------- /AUTHORS.md: -------------------------------------------------------------------------------- 1 | # Authors 2 | 3 | ## Maintainer 4 | 5 | - Benjamin P. Jung <headcr4sh@gmail.com> 6 | 7 | ## Contributors 8 | 9 | - Daniel Randall <dgrandall@me.com> 10 | - Samer Shami <gitkraken@shogun.work> 11 | - Bret Mogilefsky <bmogilefsky+albcontroller@gmail.com> 12 | -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | # Changelog 2 | 3 | All notable changes to this project will be documented in this file. 4 | 5 | The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), 6 | and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). 7 | 8 | ## [4.0.0] - 2021-01-05 9 | 10 | ### Updated 11 | 12 | - Renamed, now uses the AWS Load Balancer Controller (v2, formerly known as the 13 | AWS ALB Ingress Controller) 14 | 15 | ### Added 16 | 17 | - Variable `aws_load_balancer_controller_chart_version` 18 | - Variable `alb_controller_depends_on` 19 | 20 | ### Removed 21 | 22 | - Variable `aws_alb_ingress_controller_version` 23 | 24 | 25 | ## [3.4.0] - 2020-06-04 26 | 27 | ### Updated 28 | 29 | - Default version of the ALB Ingress Controller has been updated to v1.1.7. 30 | 31 | ### Changed 32 | 33 | - Additional IAM permissions have been specified to allow the ALB ingress controller 34 | to manage WAF2 using new wafv2 annotations (introduced in v1.1.7). 35 | 36 | ## [3.3.0] - 2020-04-17 37 | 38 | ### Added 39 | 40 | - Additional pod labels and annotations can now be configured. 41 | 42 | ## [3.2.0] - 2020-04-15 43 | 44 | ### Added 45 | 46 | - The amount of replicas can now be freely configured. 47 | 48 | ## [3.1.1] - 2020-04-15 49 | 50 | ### Fixes 51 | 52 | - The update strategy of pods within the Kubernetes deployment has been set to `Recreate`. 53 | This should fix "stuck" updates. 54 | ([#6](https://github.com/iplabs/terraform-kubernetes-alb-ingress-controller/issues/6)) 55 | 56 | ## [3.1.0] - 2020-04-01 57 | 58 | ### Updated 59 | 60 | - Default version of the ALB Ingress Controller has been set to [1.1.6](https://github.com/kubernetes-sigs/aws-alb-ingress-controller/releases/tag/v1.1.6). 61 | 62 | ### Added 63 | 64 | - Support for AWS Shield related annotations has been added. This new feature 65 | needs a bunch of new AWS IAM permissions which have been added to the IAM policy 66 | used by the ALB Ingress Controller. 67 | 68 | ## [3.0.2] - 2020-02-09 69 | 70 | ### Fixed 71 | 72 | - An unset IAM path prefix no longer leads to errors. ([#4](https://github.com/iplabs/terraform-kubernetes-alb-ingress-controller/issues/4)) 73 | 74 | ## [3.0.1] - 2020-01-22 75 | 76 | ### Added 77 | 78 | - Add ARN of the IAM role used by the ALB Ingress controller as output variable. 79 | 80 | ### Changed 81 | 82 | - Improve documentation of input variables. 83 | 84 | ## [3.0.0] - 2020-01-22 85 | 86 | ### Added 87 | 88 | - The type of the Kubernetes cluster can no be specified. 89 | Set this to `eks` if targeting a managed [EKS](https://aws.amazon.com/eks/) Cluster. 90 | - If targeting EKS clusters, pods will [use IAM roles for service accounts](https://docs.aws.amazon.com/eks/latest/userguide/enable-iam-roles-for-service-accounts.html) 91 | as intended by AWS. ([#3](https://github.com/iplabs/terraform-kubernetes-alb-ingress-controller/issues/3)) 92 | 93 | ### Updated 94 | 95 | - The default version of the controller has been set to [v1.1.5](https://github.com/kubernetes-sigs/aws-alb-ingress-controller/releases/tag/v1.1.5) 96 | 97 | ## [2.0.0] - 2019-08-30 98 | 99 | ### Updated 100 | 101 | - Module has been updated to Terraform 0.12 format. ([#1](https://github.com/iplabs/terraform-kubernetes-alb-ingress-controller/issues/1)) 102 | 103 | ### Changed 104 | 105 | - Kubernetes labels have been updated to comply with known best practices. 106 | 107 | ## [1.0.0] - 2019-04-12 108 | 109 | ### Added 110 | 111 | - Initial version 112 | -------------------------------------------------------------------------------- /CONTRIBUTING.md: -------------------------------------------------------------------------------- 1 | # Welcome! 2 | 3 | We're so glad you're thinking about contributing to a [open source project of the U.S. government](https://code.gov/)! If you're unsure about anything, just ask -- or submit the issue or pull request anyway. The worst that can happen is you'll be politely asked to change something. We love all friendly contributions. 4 | 5 | We encourage you to read this project's CONTRIBUTING policy (you are here), its [LICENSE](LICENSE.md), and its [README](README.md). 6 | 7 | ## Policies 8 | 9 | We want to ensure a welcoming environment for all of our projects. Our staff follow the [TTS Code of Conduct](https://18f.gsa.gov/code-of-conduct/) and all contributors should do the same. 10 | 11 | We adhere to the [18F Open Source Policy](https://github.com/18f/open-source-policy). If you have any questions, just [shoot us an email](mailto:18f@gsa.gov). 12 | 13 | As part of a U.S. government agency, the General Services Administration (GSA)’s Technology Transformation Services (TTS) takes seriously our responsibility to protect the public’s information, including financial and personal information, from unwarranted disclosure. For more information about security and vulnerability disclosure for our projects, please read our [18F Vulnerability Disclosure Policy](https://18f.gsa.gov/vulnerability-disclosure-policy/). 14 | 15 | ## Public domain 16 | 17 | This project is in the public domain within the United States, and copyright and related rights in the work worldwide are waived through the [CC0 1.0 Universal public domain dedication](https://creativecommons.org/publicdomain/zero/1.0/). 18 | 19 | All contributions to this project will be released under the CC0 dedication. By submitting a pull request or issue, you are agreeing to comply with this waiver of copyright interest. 20 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Mozilla Public License Version 2.0 2 | ================================== 3 | 4 | 1. Definitions 5 | -------------- 6 | 7 | 1.1. "Contributor" 8 | means each individual or legal entity that creates, contributes to 9 | the creation of, or owns Covered Software. 10 | 11 | 1.2. "Contributor Version" 12 | means the combination of the Contributions of others (if any) used 13 | by a Contributor and that particular Contributor's Contribution. 14 | 15 | 1.3. "Contribution" 16 | means Covered Software of a particular Contributor. 17 | 18 | 1.4. "Covered Software" 19 | means Source Code Form to which the initial Contributor has attached 20 | the notice in Exhibit A, the Executable Form of such Source Code 21 | Form, and Modifications of such Source Code Form, in each case 22 | including portions thereof. 23 | 24 | 1.5. "Incompatible With Secondary Licenses" 25 | means 26 | 27 | (a) that the initial Contributor has attached the notice described 28 | in Exhibit B to the Covered Software; or 29 | 30 | (b) that the Covered Software was made available under the terms of 31 | version 1.1 or earlier of the License, but not also under the 32 | terms of a Secondary License. 33 | 34 | 1.6. "Executable Form" 35 | means any form of the work other than Source Code Form. 36 | 37 | 1.7. "Larger Work" 38 | means a work that combines Covered Software with other material, in 39 | a separate file or files, that is not Covered Software. 40 | 41 | 1.8. "License" 42 | means this document. 43 | 44 | 1.9. "Licensable" 45 | means having the right to grant, to the maximum extent possible, 46 | whether at the time of the initial grant or subsequently, any and 47 | all of the rights conveyed by this License. 48 | 49 | 1.10. "Modifications" 50 | means any of the following: 51 | 52 | (a) any file in Source Code Form that results from an addition to, 53 | deletion from, or modification of the contents of Covered 54 | Software; or 55 | 56 | (b) any new file in Source Code Form that contains any Covered 57 | Software. 58 | 59 | 1.11. "Patent Claims" of a Contributor 60 | means any patent claim(s), including without limitation, method, 61 | process, and apparatus claims, in any patent Licensable by such 62 | Contributor that would be infringed, but for the grant of the 63 | License, by the making, using, selling, offering for sale, having 64 | made, import, or transfer of either its Contributions or its 65 | Contributor Version. 66 | 67 | 1.12. "Secondary License" 68 | means either the GNU General Public License, Version 2.0, the GNU 69 | Lesser General Public License, Version 2.1, the GNU Affero General 70 | Public License, Version 3.0, or any later versions of those 71 | licenses. 72 | 73 | 1.13. "Source Code Form" 74 | means the form of the work preferred for making modifications. 75 | 76 | 1.14. "You" (or "Your") 77 | means an individual or a legal entity exercising rights under this 78 | License. For legal entities, "You" includes any entity that 79 | controls, is controlled by, or is under common control with You. For 80 | purposes of this definition, "control" means (a) the power, direct 81 | or indirect, to cause the direction or management of such entity, 82 | whether by contract or otherwise, or (b) ownership of more than 83 | fifty percent (50%) of the outstanding shares or beneficial 84 | ownership of such entity. 85 | 86 | 2. License Grants and Conditions 87 | -------------------------------- 88 | 89 | 2.1. Grants 90 | 91 | Each Contributor hereby grants You a world-wide, royalty-free, 92 | non-exclusive license: 93 | 94 | (a) under intellectual property rights (other than patent or trademark) 95 | Licensable by such Contributor to use, reproduce, make available, 96 | modify, display, perform, distribute, and otherwise exploit its 97 | Contributions, either on an unmodified basis, with Modifications, or 98 | as part of a Larger Work; and 99 | 100 | (b) under Patent Claims of such Contributor to make, use, sell, offer 101 | for sale, have made, import, and otherwise transfer either its 102 | Contributions or its Contributor Version. 103 | 104 | 2.2. Effective Date 105 | 106 | The licenses granted in Section 2.1 with respect to any Contribution 107 | become effective for each Contribution on the date the Contributor first 108 | distributes such Contribution. 109 | 110 | 2.3. Limitations on Grant Scope 111 | 112 | The licenses granted in this Section 2 are the only rights granted under 113 | this License. No additional rights or licenses will be implied from the 114 | distribution or licensing of Covered Software under this License. 115 | Notwithstanding Section 2.1(b) above, no patent license is granted by a 116 | Contributor: 117 | 118 | (a) for any code that a Contributor has removed from Covered Software; 119 | or 120 | 121 | (b) for infringements caused by: (i) Your and any other third party's 122 | modifications of Covered Software, or (ii) the combination of its 123 | Contributions with other software (except as part of its Contributor 124 | Version); or 125 | 126 | (c) under Patent Claims infringed by Covered Software in the absence of 127 | its Contributions. 128 | 129 | This License does not grant any rights in the trademarks, service marks, 130 | or logos of any Contributor (except as may be necessary to comply with 131 | the notice requirements in Section 3.4). 132 | 133 | 2.4. Subsequent Licenses 134 | 135 | No Contributor makes additional grants as a result of Your choice to 136 | distribute the Covered Software under a subsequent version of this 137 | License (see Section 10.2) or under the terms of a Secondary License (if 138 | permitted under the terms of Section 3.3). 139 | 140 | 2.5. Representation 141 | 142 | Each Contributor represents that the Contributor believes its 143 | Contributions are its original creation(s) or it has sufficient rights 144 | to grant the rights to its Contributions conveyed by this License. 145 | 146 | 2.6. Fair Use 147 | 148 | This License is not intended to limit any rights You have under 149 | applicable copyright doctrines of fair use, fair dealing, or other 150 | equivalents. 151 | 152 | 2.7. Conditions 153 | 154 | Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted 155 | in Section 2.1. 156 | 157 | 3. Responsibilities 158 | ------------------- 159 | 160 | 3.1. Distribution of Source Form 161 | 162 | All distribution of Covered Software in Source Code Form, including any 163 | Modifications that You create or to which You contribute, must be under 164 | the terms of this License. You must inform recipients that the Source 165 | Code Form of the Covered Software is governed by the terms of this 166 | License, and how they can obtain a copy of this License. You may not 167 | attempt to alter or restrict the recipients' rights in the Source Code 168 | Form. 169 | 170 | 3.2. Distribution of Executable Form 171 | 172 | If You distribute Covered Software in Executable Form then: 173 | 174 | (a) such Covered Software must also be made available in Source Code 175 | Form, as described in Section 3.1, and You must inform recipients of 176 | the Executable Form how they can obtain a copy of such Source Code 177 | Form by reasonable means in a timely manner, at a charge no more 178 | than the cost of distribution to the recipient; and 179 | 180 | (b) You may distribute such Executable Form under the terms of this 181 | License, or sublicense it under different terms, provided that the 182 | license for the Executable Form does not attempt to limit or alter 183 | the recipients' rights in the Source Code Form under this License. 184 | 185 | 3.3. Distribution of a Larger Work 186 | 187 | You may create and distribute a Larger Work under terms of Your choice, 188 | provided that You also comply with the requirements of this License for 189 | the Covered Software. If the Larger Work is a combination of Covered 190 | Software with a work governed by one or more Secondary Licenses, and the 191 | Covered Software is not Incompatible With Secondary Licenses, this 192 | License permits You to additionally distribute such Covered Software 193 | under the terms of such Secondary License(s), so that the recipient of 194 | the Larger Work may, at their option, further distribute the Covered 195 | Software under the terms of either this License or such Secondary 196 | License(s). 197 | 198 | 3.4. Notices 199 | 200 | You may not remove or alter the substance of any license notices 201 | (including copyright notices, patent notices, disclaimers of warranty, 202 | or limitations of liability) contained within the Source Code Form of 203 | the Covered Software, except that You may alter any license notices to 204 | the extent required to remedy known factual inaccuracies. 205 | 206 | 3.5. Application of Additional Terms 207 | 208 | You may choose to offer, and to charge a fee for, warranty, support, 209 | indemnity or liability obligations to one or more recipients of Covered 210 | Software. However, You may do so only on Your own behalf, and not on 211 | behalf of any Contributor. You must make it absolutely clear that any 212 | such warranty, support, indemnity, or liability obligation is offered by 213 | You alone, and You hereby agree to indemnify every Contributor for any 214 | liability incurred by such Contributor as a result of warranty, support, 215 | indemnity or liability terms You offer. You may include additional 216 | disclaimers of warranty and limitations of liability specific to any 217 | jurisdiction. 218 | 219 | 4. Inability to Comply Due to Statute or Regulation 220 | --------------------------------------------------- 221 | 222 | If it is impossible for You to comply with any of the terms of this 223 | License with respect to some or all of the Covered Software due to 224 | statute, judicial order, or regulation then You must: (a) comply with 225 | the terms of this License to the maximum extent possible; and (b) 226 | describe the limitations and the code they affect. Such description must 227 | be placed in a text file included with all distributions of the Covered 228 | Software under this License. Except to the extent prohibited by statute 229 | or regulation, such description must be sufficiently detailed for a 230 | recipient of ordinary skill to be able to understand it. 231 | 232 | 5. Termination 233 | -------------- 234 | 235 | 5.1. The rights granted under this License will terminate automatically 236 | if You fail to comply with any of its terms. However, if You become 237 | compliant, then the rights granted under this License from a particular 238 | Contributor are reinstated (a) provisionally, unless and until such 239 | Contributor explicitly and finally terminates Your grants, and (b) on an 240 | ongoing basis, if such Contributor fails to notify You of the 241 | non-compliance by some reasonable means prior to 60 days after You have 242 | come back into compliance. Moreover, Your grants from a particular 243 | Contributor are reinstated on an ongoing basis if such Contributor 244 | notifies You of the non-compliance by some reasonable means, this is the 245 | first time You have received notice of non-compliance with this License 246 | from such Contributor, and You become compliant prior to 30 days after 247 | Your receipt of the notice. 248 | 249 | 5.2. If You initiate litigation against any entity by asserting a patent 250 | infringement claim (excluding declaratory judgment actions, 251 | counter-claims, and cross-claims) alleging that a Contributor Version 252 | directly or indirectly infringes any patent, then the rights granted to 253 | You by any and all Contributors for the Covered Software under Section 254 | 2.1 of this License shall terminate. 255 | 256 | 5.3. In the event of termination under Sections 5.1 or 5.2 above, all 257 | end user license agreements (excluding distributors and resellers) which 258 | have been validly granted by You or Your distributors under this License 259 | prior to termination shall survive termination. 260 | 261 | ************************************************************************ 262 | * * 263 | * 6. Disclaimer of Warranty * 264 | * ------------------------- * 265 | * * 266 | * Covered Software is provided under this License on an "as is" * 267 | * basis, without warranty of any kind, either expressed, implied, or * 268 | * statutory, including, without limitation, warranties that the * 269 | * Covered Software is free of defects, merchantable, fit for a * 270 | * particular purpose or non-infringing. The entire risk as to the * 271 | * quality and performance of the Covered Software is with You. * 272 | * Should any Covered Software prove defective in any respect, You * 273 | * (not any Contributor) assume the cost of any necessary servicing, * 274 | * repair, or correction. This disclaimer of warranty constitutes an * 275 | * essential part of this License. No use of any Covered Software is * 276 | * authorized under this License except under this disclaimer. * 277 | * * 278 | ************************************************************************ 279 | 280 | ************************************************************************ 281 | * * 282 | * 7. Limitation of Liability * 283 | * -------------------------- * 284 | * * 285 | * Under no circumstances and under no legal theory, whether tort * 286 | * (including negligence), contract, or otherwise, shall any * 287 | * Contributor, or anyone who distributes Covered Software as * 288 | * permitted above, be liable to You for any direct, indirect, * 289 | * special, incidental, or consequential damages of any character * 290 | * including, without limitation, damages for lost profits, loss of * 291 | * goodwill, work stoppage, computer failure or malfunction, or any * 292 | * and all other commercial damages or losses, even if such party * 293 | * shall have been informed of the possibility of such damages. This * 294 | * limitation of liability shall not apply to liability for death or * 295 | * personal injury resulting from such party's negligence to the * 296 | * extent applicable law prohibits such limitation. Some * 297 | * jurisdictions do not allow the exclusion or limitation of * 298 | * incidental or consequential damages, so this exclusion and * 299 | * limitation may not apply to You. * 300 | * * 301 | ************************************************************************ 302 | 303 | 8. Litigation 304 | ------------- 305 | 306 | Any litigation relating to this License may be brought only in the 307 | courts of a jurisdiction where the defendant maintains its principal 308 | place of business and such litigation shall be governed by laws of that 309 | jurisdiction, without reference to its conflict-of-law provisions. 310 | Nothing in this Section shall prevent a party's ability to bring 311 | cross-claims or counter-claims. 312 | 313 | 9. Miscellaneous 314 | ---------------- 315 | 316 | This License represents the complete agreement concerning the subject 317 | matter hereof. If any provision of this License is held to be 318 | unenforceable, such provision shall be reformed only to the extent 319 | necessary to make it enforceable. Any law or regulation which provides 320 | that the language of a contract shall be construed against the drafter 321 | shall not be used to construe this License against a Contributor. 322 | 323 | 10. Versions of the License 324 | --------------------------- 325 | 326 | 10.1. New Versions 327 | 328 | Mozilla Foundation is the license steward. Except as provided in Section 329 | 10.3, no one other than the license steward has the right to modify or 330 | publish new versions of this License. Each version will be given a 331 | distinguishing version number. 332 | 333 | 10.2. Effect of New Versions 334 | 335 | You may distribute the Covered Software under the terms of the version 336 | of the License under which You originally received the Covered Software, 337 | or under the terms of any subsequent version published by the license 338 | steward. 339 | 340 | 10.3. Modified Versions 341 | 342 | If you create software not governed by this License, and you want to 343 | create a new license for such software, you may create and use a 344 | modified version of this License if you rename the license and remove 345 | any references to the name of the license steward (except to note that 346 | such modified license differs from this License). 347 | 348 | 10.4. Distributing Source Code Form that is Incompatible With Secondary 349 | Licenses 350 | 351 | If You choose to distribute Source Code Form that is Incompatible With 352 | Secondary Licenses under the terms of this version of the License, the 353 | notice described in Exhibit B of this License must be attached. 354 | 355 | Exhibit A - Source Code Form License Notice 356 | ------------------------------------------- 357 | 358 | This Source Code Form is subject to the terms of the Mozilla Public 359 | License, v. 2.0. If a copy of the MPL was not distributed with this 360 | file, You can obtain one at http://mozilla.org/MPL/2.0/. 361 | 362 | If it is not possible or desirable to put the notice in a particular 363 | file, then You may include the notice in a location (such as a LICENSE 364 | file in a relevant directory) where a recipient would be likely to look 365 | for such a notice. 366 | 367 | You may add additional accurate notices of copyright ownership. 368 | 369 | Exhibit B - "Incompatible With Secondary Licenses" Notice 370 | --------------------------------------------------------- 371 | 372 | This Source Code Form is "Incompatible With Secondary Licenses", as 373 | defined by the Mozilla Public License, v. 2.0. 374 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Terraform module: AWS Load Balancer Controller installation 2 | 3 | This Terraform module can be used to install the [AWS Load Balancer 4 | Controller](https://github.com/kubernetes-sigs/aws-load-balancer-controller) 5 | into a Kubernetes cluster. 6 | 7 | ## Improved integration with Amazon Elastic Kubernetes Service (EKS) 8 | 9 | This module can be used to install the AWS Load Balancer controller into a "vanilla" Kubernetes cluster (which is the default) 10 | or it can be used to integrate tightly with AWS-managed [EKS](https://aws.amazon.com/eks/) clusters which allows the deployed pods to 11 | [use IAM roles for service accounts](https://docs.aws.amazon.com/eks/latest/userguide/enable-iam-roles-for-service-accounts.html). 12 | 13 | It is required that an OpenID connect provider [has already been created](https://www.terraform.io/docs/providers/aws/r/eks_cluster.html#example-iam-role-for-eks-cluster) for your EKS cluster for this feature to work. 14 | 15 | Just make sure that you set the variable `k8s_cluster_type` to `eks` type if running on EKS. 16 | 17 | Using the NLB functionality requires that you also install the AWS VPC CNI add-on, like this: 18 | ```hcl 19 | resource "aws_eks_addon" "vpc-cni" { 20 | cluster_name = "" 21 | addon_name = "vpc-cni" 22 | } 23 | ``` 24 | 25 | ## Examples 26 | 27 | ### EKS deployment 28 | 29 | To deploy the AWS Load Balancer Controller into an EKS cluster, use the following 30 | snippet as an example. 31 | 32 | ```hcl 33 | locals { 34 | # Your AWS EKS Cluster ID goes here. 35 | "k8s_cluster_name" = "my-k8s-cluster" 36 | } 37 | 38 | data "aws_region" "current" {} 39 | 40 | data "aws_eks_cluster" "target" { 41 | name = local.k8s_cluster_name 42 | } 43 | 44 | data "aws_eks_cluster_auth" "aws_iam_authenticator" { 45 | name = data.aws_eks_cluster.target.name 46 | } 47 | 48 | provider "kubernetes" { 49 | alias = "eks" 50 | host = data.aws_eks_cluster.target.endpoint 51 | token = data.aws_eks_cluster_auth.aws_iam_authenticator.token 52 | cluster_ca_certificate = base64decode(data.aws_eks_cluster.target.certificate_authority[0].data) 53 | load_config_file = false 54 | } 55 | 56 | provider "helm" { 57 | alias = "eks" 58 | kubernetes { 59 | host = data.aws_eks_cluster.target.endpoint 60 | token = data.aws_eks_cluster_auth.aws_iam_authenticator.token 61 | cluster_ca_certificate = base64decode(data.aws_eks_cluster.target.certificate_authority[0].data) 62 | } 63 | } 64 | 65 | module "alb_controller" { 66 | source = "iplabs/alb-controller/kubernetes" 67 | version = "3.4.0" 68 | 69 | providers = { 70 | kubernetes = "kubernetes.eks", 71 | helm = "helm.eks" 72 | } 73 | 74 | k8s_cluster_type = "eks" 75 | k8s_namespace = "kube-system" 76 | 77 | aws_region_name = data.aws_region.current.name 78 | k8s_cluster_name = data.aws_eks_cluster.target.name 79 | } 80 | ``` 81 | -------------------------------------------------------------------------------- /main.tf: -------------------------------------------------------------------------------- 1 | locals { 2 | alb_controller_helm_repo = "https://aws.github.io/eks-charts" 3 | alb_controller_chart_name = "aws-load-balancer-controller" 4 | alb_controller_chart_version = var.aws_load_balancer_controller_chart_version 5 | aws_alb_ingress_class = "alb" 6 | aws_vpc_id = data.aws_vpc.selected.id 7 | aws_region_name = data.aws_region.current.name 8 | aws_iam_path_prefix = var.aws_iam_path_prefix == "" ? null : var.aws_iam_path_prefix 9 | } 10 | 11 | data "aws_vpc" "selected" { 12 | id = var.k8s_cluster_type == "eks" ? data.aws_eks_cluster.selected[0].vpc_config[0].vpc_id : var.aws_vpc_id 13 | } 14 | 15 | data "aws_region" "current" { 16 | name = var.aws_region_name 17 | } 18 | 19 | data "aws_caller_identity" "current" {} 20 | 21 | # The EKS cluster (if any) that represents the installation target. 22 | data "aws_eks_cluster" "selected" { 23 | count = var.k8s_cluster_type == "eks" ? 1 : 0 24 | name = var.k8s_cluster_name 25 | depends_on = [var.alb_controller_depends_on] 26 | } 27 | 28 | # Authentication data for that cluster 29 | data "aws_eks_cluster_auth" "selected" { 30 | count = var.k8s_cluster_type == "eks" ? 1 : 0 31 | name = var.k8s_cluster_name 32 | depends_on = [var.alb_controller_depends_on] 33 | } 34 | 35 | data "aws_iam_policy_document" "ec2_assume_role" { 36 | count = var.k8s_cluster_type == "vanilla" ? 1 : 0 37 | statement { 38 | actions = ["sts:AssumeRole"] 39 | 40 | principals { 41 | type = "Service" 42 | identifiers = ["ec2.amazonaws.com"] 43 | } 44 | } 45 | } 46 | 47 | data "aws_iam_policy_document" "eks_oidc_assume_role" { 48 | count = var.k8s_cluster_type == "eks" ? 1 : 0 49 | statement { 50 | actions = ["sts:AssumeRoleWithWebIdentity"] 51 | effect = "Allow" 52 | condition { 53 | test = "StringEquals" 54 | variable = "${replace(data.aws_eks_cluster.selected[0].identity[0].oidc[0].issuer, "https://", "")}:sub" 55 | values = [ 56 | "system:serviceaccount:${var.k8s_namespace}:aws-load-balancer-controller" 57 | ] 58 | } 59 | principals { 60 | identifiers = [ 61 | "arn:aws:iam::${data.aws_caller_identity.current.account_id}:oidc-provider/${replace(data.aws_eks_cluster.selected[0].identity[0].oidc[0].issuer, "https://", "")}" 62 | ] 63 | type = "Federated" 64 | } 65 | } 66 | } 67 | 68 | resource "aws_iam_role" "this" { 69 | name = substr("${var.aws_resource_name_prefix}${var.k8s_cluster_name}-aws-load-balancer-controller", 0, 64) 70 | description = "Permissions required by the Kubernetes AWS Load Balancer controller to do its job." 71 | path = local.aws_iam_path_prefix 72 | 73 | tags = var.aws_tags 74 | 75 | force_detach_policies = true 76 | 77 | assume_role_policy = var.k8s_cluster_type == "vanilla" ? data.aws_iam_policy_document.ec2_assume_role[0].json : data.aws_iam_policy_document.eks_oidc_assume_role[0].json 78 | } 79 | 80 | resource "aws_iam_policy" "this" { 81 | name = "${var.aws_resource_name_prefix}${var.k8s_cluster_name}-alb-management" 82 | description = "Permissions that are required to manage AWS Application Load Balancers." 83 | path = local.aws_iam_path_prefix 84 | # We use a heredoc for the policy JSON so that we can more easily diff and 85 | # copy/paste from upstream. Ignore whitespace when you diff to more easily see the changes! 86 | # Source: `curl -o iam-policy.json https://raw.githubusercontent.com/kubernetes-sigs/aws-load-balancer-controller/v2.3.1/docs/install/iam_policy.json` 87 | policy = <<-POLICY 88 | { 89 | "Version": "2012-10-17", 90 | "Statement": [ 91 | { 92 | "Effect": "Allow", 93 | "Action": "iam:CreateServiceLinkedRole", 94 | "Resource": "*", 95 | "Condition": { 96 | "StringEquals": { 97 | "iam:AWSServiceName": "elasticloadbalancing.amazonaws.com" 98 | } 99 | } 100 | }, 101 | { 102 | "Effect": "Allow", 103 | "Action": [ 104 | "ec2:DescribeAccountAttributes", 105 | "ec2:DescribeAddresses", 106 | "ec2:DescribeAvailabilityZones", 107 | "ec2:DescribeInternetGateways", 108 | "ec2:DescribeVpcs", 109 | "ec2:DescribeVpcPeeringConnections", 110 | "ec2:DescribeSubnets", 111 | "ec2:DescribeSecurityGroups", 112 | "ec2:DescribeInstances", 113 | "ec2:DescribeNetworkInterfaces", 114 | "ec2:DescribeTags", 115 | "ec2:GetCoipPoolUsage", 116 | "ec2:DescribeCoipPools", 117 | "elasticloadbalancing:DescribeLoadBalancers", 118 | "elasticloadbalancing:DescribeLoadBalancerAttributes", 119 | "elasticloadbalancing:DescribeListeners", 120 | "elasticloadbalancing:DescribeListenerCertificates", 121 | "elasticloadbalancing:DescribeSSLPolicies", 122 | "elasticloadbalancing:DescribeRules", 123 | "elasticloadbalancing:DescribeTargetGroups", 124 | "elasticloadbalancing:DescribeTargetGroupAttributes", 125 | "elasticloadbalancing:DescribeTargetHealth", 126 | "elasticloadbalancing:DescribeTags" 127 | ], 128 | "Resource": "*" 129 | }, 130 | { 131 | "Effect": "Allow", 132 | "Action": [ 133 | "cognito-idp:DescribeUserPoolClient", 134 | "acm:ListCertificates", 135 | "acm:DescribeCertificate", 136 | "iam:ListServerCertificates", 137 | "iam:GetServerCertificate", 138 | "waf-regional:GetWebACL", 139 | "waf-regional:GetWebACLForResource", 140 | "waf-regional:AssociateWebACL", 141 | "waf-regional:DisassociateWebACL", 142 | "wafv2:GetWebACL", 143 | "wafv2:GetWebACLForResource", 144 | "wafv2:AssociateWebACL", 145 | "wafv2:DisassociateWebACL", 146 | "shield:GetSubscriptionState", 147 | "shield:DescribeProtection", 148 | "shield:CreateProtection", 149 | "shield:DeleteProtection" 150 | ], 151 | "Resource": "*" 152 | }, 153 | { 154 | "Effect": "Allow", 155 | "Action": [ 156 | "ec2:AuthorizeSecurityGroupIngress", 157 | "ec2:RevokeSecurityGroupIngress" 158 | ], 159 | "Resource": "*" 160 | }, 161 | { 162 | "Effect": "Allow", 163 | "Action": [ 164 | "ec2:CreateSecurityGroup" 165 | ], 166 | "Resource": "*" 167 | }, 168 | { 169 | "Effect": "Allow", 170 | "Action": [ 171 | "ec2:CreateTags" 172 | ], 173 | "Resource": "arn:aws:ec2:*:*:security-group/*", 174 | "Condition": { 175 | "StringEquals": { 176 | "ec2:CreateAction": "CreateSecurityGroup" 177 | }, 178 | "Null": { 179 | "aws:RequestTag/elbv2.k8s.aws/cluster": "false" 180 | } 181 | } 182 | }, 183 | { 184 | "Effect": "Allow", 185 | "Action": [ 186 | "ec2:CreateTags", 187 | "ec2:DeleteTags" 188 | ], 189 | "Resource": "arn:aws:ec2:*:*:security-group/*", 190 | "Condition": { 191 | "Null": { 192 | "aws:RequestTag/elbv2.k8s.aws/cluster": "true", 193 | "aws:ResourceTag/elbv2.k8s.aws/cluster": "false" 194 | } 195 | } 196 | }, 197 | { 198 | "Effect": "Allow", 199 | "Action": [ 200 | "ec2:AuthorizeSecurityGroupIngress", 201 | "ec2:RevokeSecurityGroupIngress", 202 | "ec2:DeleteSecurityGroup" 203 | ], 204 | "Resource": "*", 205 | "Condition": { 206 | "Null": { 207 | "aws:ResourceTag/elbv2.k8s.aws/cluster": "false" 208 | } 209 | } 210 | }, 211 | { 212 | "Effect": "Allow", 213 | "Action": [ 214 | "elasticloadbalancing:CreateLoadBalancer", 215 | "elasticloadbalancing:CreateTargetGroup" 216 | ], 217 | "Resource": "*", 218 | "Condition": { 219 | "Null": { 220 | "aws:RequestTag/elbv2.k8s.aws/cluster": "false" 221 | } 222 | } 223 | }, 224 | { 225 | "Effect": "Allow", 226 | "Action": [ 227 | "elasticloadbalancing:CreateListener", 228 | "elasticloadbalancing:DeleteListener", 229 | "elasticloadbalancing:CreateRule", 230 | "elasticloadbalancing:DeleteRule" 231 | ], 232 | "Resource": "*" 233 | }, 234 | { 235 | "Effect": "Allow", 236 | "Action": [ 237 | "elasticloadbalancing:AddTags", 238 | "elasticloadbalancing:RemoveTags" 239 | ], 240 | "Resource": [ 241 | "arn:aws:elasticloadbalancing:*:*:targetgroup/*/*", 242 | "arn:aws:elasticloadbalancing:*:*:loadbalancer/net/*/*", 243 | "arn:aws:elasticloadbalancing:*:*:loadbalancer/app/*/*" 244 | ], 245 | "Condition": { 246 | "Null": { 247 | "aws:RequestTag/elbv2.k8s.aws/cluster": "true", 248 | "aws:ResourceTag/elbv2.k8s.aws/cluster": "false" 249 | } 250 | } 251 | }, 252 | { 253 | "Effect": "Allow", 254 | "Action": [ 255 | "elasticloadbalancing:AddTags", 256 | "elasticloadbalancing:RemoveTags" 257 | ], 258 | "Resource": [ 259 | "arn:aws:elasticloadbalancing:*:*:listener/net/*/*/*", 260 | "arn:aws:elasticloadbalancing:*:*:listener/app/*/*/*", 261 | "arn:aws:elasticloadbalancing:*:*:listener-rule/net/*/*/*", 262 | "arn:aws:elasticloadbalancing:*:*:listener-rule/app/*/*/*" 263 | ] 264 | }, 265 | { 266 | "Effect": "Allow", 267 | "Action": [ 268 | "elasticloadbalancing:ModifyLoadBalancerAttributes", 269 | "elasticloadbalancing:SetIpAddressType", 270 | "elasticloadbalancing:SetSecurityGroups", 271 | "elasticloadbalancing:SetSubnets", 272 | "elasticloadbalancing:DeleteLoadBalancer", 273 | "elasticloadbalancing:ModifyTargetGroup", 274 | "elasticloadbalancing:ModifyTargetGroupAttributes", 275 | "elasticloadbalancing:DeleteTargetGroup" 276 | ], 277 | "Resource": "*", 278 | "Condition": { 279 | "Null": { 280 | "aws:ResourceTag/elbv2.k8s.aws/cluster": "false" 281 | } 282 | } 283 | }, 284 | { 285 | "Effect": "Allow", 286 | "Action": [ 287 | "elasticloadbalancing:RegisterTargets", 288 | "elasticloadbalancing:DeregisterTargets" 289 | ], 290 | "Resource": "arn:aws:elasticloadbalancing:*:*:targetgroup/*/*" 291 | }, 292 | { 293 | "Effect": "Allow", 294 | "Action": [ 295 | "elasticloadbalancing:SetWebAcl", 296 | "elasticloadbalancing:ModifyListener", 297 | "elasticloadbalancing:AddListenerCertificates", 298 | "elasticloadbalancing:RemoveListenerCertificates", 299 | "elasticloadbalancing:ModifyRule" 300 | ], 301 | "Resource": "*" 302 | } 303 | ] 304 | } 305 | POLICY 306 | } 307 | 308 | resource "aws_iam_role_policy_attachment" "this" { 309 | policy_arn = aws_iam_policy.this.arn 310 | role = aws_iam_role.this.name 311 | } 312 | 313 | resource "kubernetes_service_account" "this" { 314 | automount_service_account_token = true 315 | metadata { 316 | name = "aws-load-balancer-controller" 317 | namespace = var.k8s_namespace 318 | annotations = { 319 | # This annotation is only used when running on EKS which can 320 | # use IAM roles for service accounts. 321 | "eks.amazonaws.com/role-arn" = aws_iam_role.this.arn 322 | } 323 | labels = { 324 | "app.kubernetes.io/name" = "aws-load-balancer-controller" 325 | "app.kubernetes.io/component" = "controller" 326 | "app.kubernetes.io/managed-by" = "terraform" 327 | } 328 | } 329 | depends_on = [var.alb_controller_depends_on] 330 | } 331 | 332 | resource "kubernetes_cluster_role" "this" { 333 | metadata { 334 | name = "aws-load-balancer-controller" 335 | 336 | labels = { 337 | "app.kubernetes.io/name" = "aws-load-balancer-controller" 338 | "app.kubernetes.io/managed-by" = "terraform" 339 | } 340 | } 341 | 342 | rule { 343 | api_groups = [ 344 | "", 345 | "extensions", 346 | ] 347 | 348 | resources = [ 349 | "configmaps", 350 | "endpoints", 351 | "events", 352 | "ingresses", 353 | "ingresses/status", 354 | "services", 355 | ] 356 | 357 | verbs = [ 358 | "create", 359 | "get", 360 | "list", 361 | "update", 362 | "watch", 363 | "patch", 364 | ] 365 | } 366 | 367 | rule { 368 | api_groups = [ 369 | "", 370 | "extensions", 371 | ] 372 | 373 | resources = [ 374 | "nodes", 375 | "pods", 376 | "secrets", 377 | "services", 378 | "namespaces", 379 | ] 380 | 381 | verbs = [ 382 | "get", 383 | "list", 384 | "watch", 385 | ] 386 | } 387 | depends_on = [var.alb_controller_depends_on] 388 | } 389 | 390 | resource "kubernetes_cluster_role_binding" "this" { 391 | metadata { 392 | name = "aws-load-balancer-controller" 393 | 394 | labels = { 395 | "app.kubernetes.io/name" = "aws-load-balancer-controller" 396 | "app.kubernetes.io/managed-by" = "terraform" 397 | } 398 | } 399 | 400 | role_ref { 401 | api_group = "rbac.authorization.k8s.io" 402 | kind = "ClusterRole" 403 | name = kubernetes_cluster_role.this.metadata[0].name 404 | } 405 | 406 | subject { 407 | api_group = "" 408 | kind = "ServiceAccount" 409 | name = kubernetes_service_account.this.metadata[0].name 410 | namespace = kubernetes_service_account.this.metadata[0].namespace 411 | } 412 | } 413 | 414 | resource "helm_release" "alb_controller" { 415 | 416 | name = "aws-load-balancer-controller" 417 | repository = local.alb_controller_helm_repo 418 | chart = local.alb_controller_chart_name 419 | version = local.alb_controller_chart_version 420 | namespace = var.k8s_namespace 421 | atomic = true 422 | timeout = 900 423 | 424 | dynamic "set" { 425 | 426 | for_each = { 427 | "clusterName" = var.k8s_cluster_name 428 | "serviceAccount.create" = (var.k8s_cluster_type != "eks") 429 | "serviceAccount.name" = (var.k8s_cluster_type == "eks") ? kubernetes_service_account.this.metadata[0].name : null 430 | "region" = local.aws_region_name 431 | "vpcId" = local.aws_vpc_id 432 | "hostNetwork" = var.enable_host_networking 433 | } 434 | content { 435 | name = set.key 436 | value = set.value 437 | } 438 | } 439 | 440 | dynamic "set" { 441 | for_each = var.chart_env_overrides 442 | content { 443 | name = set.key 444 | value = set.value 445 | } 446 | } 447 | 448 | depends_on = [var.alb_controller_depends_on] 449 | } 450 | 451 | # Generate a kubeconfig file for the EKS cluster to use in provisioners 452 | data "template_file" "kubeconfig" { 453 | template = <<-EOF 454 | apiVersion: v1 455 | kind: Config 456 | current-context: terraform 457 | clusters: 458 | - name: ${data.aws_eks_cluster.selected[0].name} 459 | cluster: 460 | certificate-authority-data: ${data.aws_eks_cluster.selected[0].certificate_authority.0.data} 461 | server: ${data.aws_eks_cluster.selected[0].endpoint} 462 | contexts: 463 | - name: terraform 464 | context: 465 | cluster: ${data.aws_eks_cluster.selected[0].name} 466 | user: terraform 467 | users: 468 | - name: terraform 469 | user: 470 | token: ${data.aws_eks_cluster_auth.selected[0].token} 471 | EOF 472 | } 473 | 474 | # Since the kubernetes_provider cannot yet handle CRDs, we need to set any 475 | # supplied TargetGroupBinding using a null_resource. 476 | # 477 | # The method used below for securely specifying the kubeconfig to provisioners 478 | # without spilling secrets into the logs comes from: 479 | # https://medium.com/citihub/a-more-secure-way-to-call-kubectl-from-terraform-1052adf37af8 480 | # 481 | # The method used below for referencing external resources in a destroy 482 | # provisioner via triggers comes from 483 | # https://github.com/hashicorp/terraform/issues/23679#issuecomment-886020367 484 | resource "null_resource" "supply_target_group_arns" { 485 | count = (length(var.target_groups) > 0) ? length(var.target_groups) : 0 486 | 487 | triggers = { 488 | kubeconfig = base64encode(data.template_file.kubeconfig.rendered) 489 | cmd_create = <<-EOF 490 | cat <