85 lines
3.8 KiB
Plaintext
85 lines
3.8 KiB
Plaintext
---
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layout: docs
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page_title: Manual Lambda Function Registration
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description: >-
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Register AWS Lambda functions with Consul service mesh using the Consul Lambda registrator. The Consul Lambda registrator automates Lambda function registration.
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---
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# Manual Lambda Function Registration
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This topic describes how to manually register Lambda functions into Consul. Refer to [Automate Lambda Function Registration](/docs/lambda/registration/automate) for information about using the Lambda registrator to automate registration.
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## Requirements
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Verify that your environment meets the requirements specified in [Lambda Function Registration Requirements](/docs/lambda/registration/index).
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To manually register Lambda functions so that mesh services can invoke them, you must create and apply a service registration configuration for the Lambda function and write a [service defaults configuration entry](/docs/connect/config-entries/service-defaults) for the function.
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## Register a Lambda function
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You can manually register Lambda functions if you are unable to automate the process using the Lambda registrator.
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1. Create a configuration for registering the service. You can copy the following example and replace `<SERVICE_NAME>` with your Consul service name for the Lambda function:
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<CodeBlockConfig filename="lambda.json">
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```json
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{
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"Node": "lambdas",
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"SkipNodeUpdate": true,
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"NodeMeta": {
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"external-node": "true",
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"external-probe": "true"
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},
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"Service": {
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"Service": "<SERVICE_NAME>"
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}
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}
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```
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</CodeBlockConfig>
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1. Save the configuration to `lambda.json`.
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1. Send the configuration to the `catalog/register` API endpoint to register the service, for example:
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```shell-session
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$ curl --request PUT --data @lambda.json localhost:8500/v1/catalog/register
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```
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1. Create the `service-defaults` configuration entry and include the AWS tags used to invoke the Lambda function in the `Meta` field (see [Supported `Meta` fields](#supported-meta-fields). The following example creates a `service-defaults` configuration entry named `lambda`:
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<CodeBlockConfig filename="lambda-service-defaults.hcl">
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```hcl
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Kind = "service-defaults"
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Name = "lambda"
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Protocol = "http"
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Meta = {
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"serverless.consul.hashicorp.com/v1alpha1/lambda/enabled" = "true"
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"serverless.consul.hashicorp.com/v1alpha1/lambda/arn" = "<INSERT ARN HERE>"
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"serverless.consul.hashicorp.com/v1alpha1/lambda/payload-passthrough" = "true"
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"serverless.consul.hashicorp.com/v1alpha1/lambda/region" = "us-east-2"
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}
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```
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</CodeBlockConfig>
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1. Issue the `consul config write` command to store the configuration entry. For example:
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```shell-session
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$ consul config write lambda-service-defaults.hcl
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```
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### Supported `Meta` fields
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The following tags are supported. The path prefix for all tags is `serverless.consul.hashicorp.com/v1alpha1/lambda`. For example, specify the following tag to enable Consul to configure the service as an AWS Lambda function:
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`serverless.consul.hashicorp.com/v1alpha1/lambda/enabled`.
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| Tag | Description |
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| --- | --- |
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| `<prefix-path>/enabled` | Determines if Consul configures the service as an AWS Lambda. |
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| `<prefix-path>/payload-passthrough` | Determines if the body Envoy receives is converted to JSON or directly passed to Lambda. |
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| `<prefix-path>/arn` | Specifies the [AWS ARN](https://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html) for the service's Lambda. |
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| `<prefix-path>/invocation-mode` | Determines if Consul configures the Lambda to be invoked using the `synchronous` or `asynchronous` [invocation mode](https://docs.aws.amazon.com/lambda/latest/operatorguide/invocation-modes.html). |
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| `<prefix-path>/region` | Specifies the AWS region the Lambda is running in. |
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