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Update example to use Aurora Serverless (#158)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,103 +1,33 @@ | ||
| const https = require('https'); | ||
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| const AWS = require('aws-sdk'); | ||
| const { Client } = require('pg'); | ||
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| const { default: CERT_DATA } = require('./rds-combined-ca-bundle.pem'); | ||
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| const { SECRET_NAME } = process.env; | ||
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| /** | ||
| * Return a new HTTPS Agent with keep-alives enabled | ||
| * | ||
| * @return {Agent} | ||
| * @see https://github.com/aws/aws-sdk-js/blob/v2.437.0/lib/http/node.js#L141 | ||
| * @see https://docs.aws.amazon.com/sdk-for-javascript/v2/developer-guide/node-configuring-maxsockets.html | ||
| */ | ||
| function getKeepAliveAgent() { | ||
| const options = { | ||
| keepAlive: true, | ||
| rejectUnauthorized: true, // from aws-sdk | ||
| maxSockets: 50, // from aws-sdk | ||
| }; | ||
| const agent = new https.Agent(options); | ||
| agent.setMaxListeners(0); // from aws-sdk | ||
| return agent; | ||
| } | ||
| const { SECRET_ARN, RESOURCE_ARN, DATABASE_NAME, SCHEMA_NAME } = process.env; | ||
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| AWS.config.logger = console; | ||
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| AWS.config.update({ | ||
| httpOptions: { | ||
| agent: getKeepAliveAgent(), | ||
| }, | ||
| }); | ||
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| /** | ||
| * Get a secret from Secrets Manager | ||
| * | ||
| * @param {String} SecretId | ||
| * @return {Promise<Object>} | ||
| */ | ||
| async function getSecret(SecretId) { | ||
| const secretsmanager = new AWS.SecretsManager(); | ||
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| const params = { | ||
| SecretId, | ||
| VersionStage: 'AWSCURRENT', | ||
| }; | ||
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| let data; | ||
| try { | ||
| data = await secretsmanager.getSecretValue(params).promise(); | ||
| if (data.SecretString) { | ||
| data = JSON.parse(data.SecretString); | ||
| } | ||
| } catch (err) { | ||
| console.error(`Unable to get secret ${SecretId}:`, err); | ||
| throw err; | ||
| } | ||
| return data; | ||
| } | ||
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| let SECRET_DATA; | ||
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| /** | ||
| * Postgres Handler | ||
| * PostgreSQL Handler | ||
| * | ||
| * @param {Object} event | ||
| * @param {Object} context | ||
| * @return {Promise} | ||
| */ | ||
| // eslint-disable-next-line no-unused-vars | ||
| exports.handler = async (event, context) => { | ||
| if (!SECRET_DATA) { | ||
| SECRET_DATA = await getSecret(SECRET_NAME); | ||
| } | ||
| const rds = new AWS.RDSDataService(); | ||
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| const config = { | ||
| user: SECRET_DATA.username, | ||
| password: SECRET_DATA.password, | ||
| database: 'postgres', | ||
| host: SECRET_DATA.host, | ||
| port: SECRET_DATA.port, | ||
| // this object will be passed to the TLSSocket constructor | ||
| ssl: { | ||
| rejectUnauthorized: true, | ||
| ca: CERT_DATA, | ||
| cert: CERT_DATA, | ||
| }, | ||
| statement_timeout: 5000, // milliseconds | ||
| const params = { | ||
| resourceArn: RESOURCE_ARN, | ||
| secretArn: SECRET_ARN, | ||
| sql: 'SELECT NOW()', | ||
| database: DATABASE_NAME, | ||
| schema: SCHEMA_NAME, | ||
| }; | ||
|
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| const client = new Client(config); | ||
| await client.connect(); | ||
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| const res = await client.query('SELECT NOW()'); | ||
| const response = await rds.executeStatement(params).promise(); | ||
|
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| const [now] = res.rows || []; | ||
| const { records = [] } = response; | ||
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| await client.end(); | ||
| const [row] = records || []; | ||
|
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| return now; | ||
| return row[0].stringValue; | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,30 +1,30 @@ | ||
| --- | ||
| Resources: | ||
|
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| ExampleLambdaRole: | ||
| Type: 'AWS::IAM::Role' | ||
| Type: "AWS::IAM::Role" | ||
| Properties: | ||
| Path: '/${self:service}/${self:provider.stage}/' | ||
| RoleName: '${self:service}-${self:provider.stage}-${self:provider.region}-ExampleLambdaRole' | ||
| RoleName: "${self:service}-${self:provider.stage}-${self:provider.region}-ExampleLambdaRole" | ||
| AssumeRolePolicyDocument: | ||
| Statement: | ||
| - Effect: Allow | ||
| Principal: | ||
| Service: 'lambda.amazonaws.com' | ||
| Action: 'sts:AssumeRole' | ||
| Service: "lambda.amazonaws.com" | ||
| Action: "sts:AssumeRole" | ||
| Policies: | ||
| - PolicyName: ExampleLambdaPolicy | ||
| PolicyDocument: | ||
| Statement: | ||
| - Effect: Allow | ||
| Action: | ||
| - 'secretsmanager:GetSecretValue' | ||
| Resource: | ||
| 'Fn::Join': | ||
| - ':' | ||
| - - 'arn:aws:secretsmanager' | ||
| - Ref: 'AWS::Region' | ||
| - Ref: 'AWS::AccountId' | ||
| - 'secret:${self:custom.secretName}-*' | ||
| Statement: | ||
| - Effect: Allow | ||
| Action: "secretsmanager:GetSecretValue" | ||
| Resource: | ||
| Ref: DBSecret | ||
| - Effect: Allow | ||
| Action: | ||
| - "rds-data:BatchExecuteStatement" | ||
| - "rds-data:BeginTransaction" | ||
| - "rds-data:CommitTransaction" | ||
| - "rds-data:ExecuteStatement" | ||
| - "rds-data:RollbackTransaction" | ||
| Resource: "*" | ||
| ManagedPolicyArns: | ||
| - 'arn:aws:iam::aws:policy/service-role/AWSLambdaVPCAccessExecutionRole' | ||
| - "arn:aws:iam::aws:policy/service-role/AWSLambdaVPCAccessExecutionRole" |
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