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feat: Implement Envoy-based load balancing schemes (#269)
* Implement Envoy-based load balancing schemes Add configuration for load_balancing_scheme setting in forwarding rules and backend service configuration. Closes: #257 Signed-off-by: Jonathan Yu <[email protected]> * remove explicit pinned version in example * fix obj Signed-off-by: Jonathan Yu <[email protected]> Co-authored-by: Bharath KKB <[email protected]>
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| # External HTTPS Load Balancer with dynamic backends | ||
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| [](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/GoogleCloudPlatform/terraform-google-lb-http&working_dir=examples/dynamic-backend&page=shell&tutorial=README.md) | ||
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| This creates an external Envoy-based HTTPS Load Balancer using dynamic | ||
| backends suitable for integrating with a Google Kubernetes Engine cluster | ||
| running [gke-autoneg-controller](https://github.com/GoogleCloudPlatform/gke-autoneg-controller). | ||
| The load balancer will not route traffic to any backend service or bucket; | ||
| instead, it expects that an external user or service will register backends | ||
| (such as Network Endpoint Groups) accordingly to serve traffic. The example | ||
| will attempt to provision a Google-managed TLS certificate for the domain | ||
| "example.com" by default and use `/api/health` as a health check endpoint. | ||
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| ## Change to the example directory | ||
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| ``` | ||
| [[ `basename $PWD` != https-gke ]] && cd examples/dynamic-backend | ||
| ``` | ||
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| ## Install Terraform | ||
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| 1. Install Terraform if it is not already installed (visit [terraform.io](https://terraform.io) for other distributions): | ||
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| ## Set up the environment | ||
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| 1. Set the project, replace `YOUR_PROJECT` with your project ID: | ||
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| ``` | ||
| PROJECT=YOUR_PROJECT | ||
| ``` | ||
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| ``` | ||
| gcloud config set project ${PROJECT} | ||
| ``` | ||
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| 2. Configure the environment for Terraform: | ||
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| ``` | ||
| [[ $CLOUD_SHELL ]] || gcloud auth application-default login | ||
| export GOOGLE_PROJECT=$(gcloud config get-value project) | ||
| ``` | ||
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| 3. Create the dynamic backend load balancer. | ||
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| ``` | ||
| ( | ||
| cd dynamic-backend/ | ||
| terraform init | ||
| terraform plan -out terraform.tfplan | ||
| terraform apply terraform.tfplan | ||
| ) | ||
| ``` | ||
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| 4. Deploy the `gke-autoneg-controller` into a GKE cluster and configure it according to the instructions. This will create a Network Endpoint Group for a service and bind it to this load balancer. | ||
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| ## Cleanup | ||
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| 1. Delete the load balancing resources created by terraform: | ||
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| ``` | ||
| terraform destroy | ||
| ``` | ||
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| <!-- BEGINNING OF PRE-COMMIT-TERRAFORM DOCS HOOK --> | ||
| ## Inputs | ||
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| | Name | Description | Type | Default | Required | | ||
| |------|-------------|------|---------|:--------:| | ||
| | domains | Domain names to use in managed certificate | `list(string)` | <pre>[<br> "example.com"<br>]</pre> | no | | ||
| | project | n/a | `string` | n/a | yes | | ||
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| ## Outputs | ||
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| No output. | ||
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| <!-- END OF PRE-COMMIT-TERRAFORM DOCS HOOK --> |
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| /** | ||
| * Copyright 2022 Google LLC | ||
| * | ||
| * Licensed 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 | ||
| * | ||
| * http://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. | ||
| */ | ||
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| provider "google" { | ||
| project = var.project | ||
| } | ||
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| provider "google-beta" { | ||
| project = var.project | ||
| } | ||
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| resource "google_compute_managed_ssl_certificate" "frontend" { | ||
| name = "managedcert" | ||
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| managed { | ||
| domains = var.domains | ||
| } | ||
| } | ||
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| module "load_balancer" { | ||
| source = "../../modules/dynamic_backends" | ||
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| name = "dynamic-backend-lb" | ||
| project = var.project | ||
| enable_ipv6 = true | ||
| create_ipv6_address = true | ||
| http_forward = false | ||
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| load_balancing_scheme = "EXTERNAL_MANAGED" | ||
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| ssl = true | ||
| use_ssl_certificates = true | ||
| ssl_certificates = [ | ||
| google_compute_managed_ssl_certificate.frontend.self_link | ||
| ] | ||
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| backends = { | ||
| default = { | ||
| description = null | ||
| protocol = "HTTPS" | ||
| port = 443 | ||
| port_name = "https" | ||
| timeout_sec = 30 | ||
| connection_draining_timeout_sec = 0 | ||
| enable_cdn = false | ||
| security_policy = null | ||
| session_affinity = null | ||
| affinity_cookie_ttl_sec = null | ||
| custom_request_headers = null | ||
| custom_response_headers = null | ||
| compression_mode = null | ||
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| health_check = { | ||
| check_interval_sec = 15 | ||
| timeout_sec = 15 | ||
| healthy_threshold = 4 | ||
| unhealthy_threshold = 4 | ||
| request_path = "/api/health" | ||
| port = 443 | ||
| host = null | ||
| logging = true | ||
| } | ||
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| log_config = { | ||
| enable = true | ||
| sample_rate = 1.0 | ||
| } | ||
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| # leave blank, NEGs are dynamically added to the lb via autoneg | ||
| groups = [] | ||
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| iap_config = { | ||
| enable = false | ||
| oauth2_client_id = "" | ||
| oauth2_client_secret = "" | ||
| } | ||
| } | ||
| } | ||
| } |
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| /** | ||
| * Copyright 2022 Google LLC | ||
| * | ||
| * Licensed 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 | ||
| * | ||
| * http://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. | ||
| */ | ||
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| variable "project" { | ||
| type = string | ||
| } | ||
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| variable "domains" { | ||
| description = "Domain names to use in managed certificate" | ||
| type = list(string) | ||
| default = ["example.com"] | ||
| } |
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