问题描述
有没有一种方法可以使用testcontainers和以下LocalStackContainer(集成)为AWS测试Lambda:
new LocalStackContainer(DockerImageName.parse('localstack/localstack:0.11.6'))
.withServices(LocalStackContainer.Service.LAMBDA)
具体来说,如何将Lambda“上载”到本地运行的服务,以便随后触发并测试它?
解决方法
启动LocalStackContainer
之后,您可以在容器内执行命令以设置基础结构。 LocalStack提供awslocal
二进制文件以创建任何AWS资源。
在测试内部,您可以执行一个@BeforeAll
步骤,您可以在其中使用容器引用并创建所有内容。
以下示例对S3和SQS(来自此blog post的引用)执行此操作:
@Testcontainers
@SpringBootTest
public class YourLocalStackIT {
@Container
static LocalStackContainer localStack = new LocalStackContainer("0.11.6")
.withServices(S3,SQS)
.withEnv("DEFAULT_REGION","eu-central-1");
@BeforeAll
static void beforeAll() throws IOException,InterruptedException {
localStack.execInContainer("awslocal","sqs","create-queue","--queue-name",QUEUE_NAME);
localStack.execInContainer("awslocal","s3","mb","s3://" + BUCKET_NAME);
}
private static final String QUEUE_NAME = "order-event-test-queue";
private static final String BUCKET_NAME = "order-event-test-bucket";
// ... actual test
}
您可以将其用作模板,以准备您的AWS Lambda函数。
关于源代码上传,我认为将.zip
版本的Lambda也挂载或复制到容器中以在内部访问它是很有意义的。
可以如下创建NodeJS lambada:
awslocal lambda create-function \
--region eu-central1 \
--function-name your-api \
--runtime nodejs8.10 \
--handler lambda.apiHandler \
--memory-size 128 \
--zip-file fileb://api-handler.zip
,
我已经成功设置了Localstack和一个MySql testcontainer(在普通的spock中),如下所示:
@Shared
public static Network network = Network.newNetwork()
@Shared
@ClassRule
public static MySQLContainer mySql = new MySQLContainer(DockerImageName.parse('mysql:5.7'))
.withNetwork(network)
.withNetworkAliases(MY_SQL_HOST_NAME) as MySQLContainer
@Shared
@ClassRule
public static LocalStackContainer localStack = new LocalStackContainer(DockerImageName.parse('localstack/localstack:0.11.6'))
.withServices(SQS,LAMBDA,CLOUDWATCH,DYNAMODB,KMS,STS,IAM)
.withNetwork(network)
.withEnv('LAMBDA_DOCKER_NETWORK',network.name)
.withCopyFileToContainer(MountableFile.forHostPath(new File('the jar file').path),'/opt/code/localstack/lambda.jar')
.withCopyFileToContainer(MountableFile.forClasspathResource('seed.yaml'),'/init/seed.yaml')
- 这将建立桥接网络,以便两个容器可以 互相交流。还将LAMBDA_DOCKER_NETWORK设置为允许lambda与MySql,SQS等进行通信。
- 将lambda jar文件复制到容器(withCopyFileToContainer)
- 我还需要KMS,因此seed.yaml会对其进行初始化(请参阅本地KMS文档)
一旦容器启动并运行,就可以使用awslocal和标准CLI命令部署lambda:
def result = localStack.execInContainer(
'awslocal','lambda','create-function','--function-name','lambda-name','--runtime','java8','--handler','uk.co.blah.blah.Handler','--role','arn:aws:iam::123456:role/irrelevant','--zip-file','fileb://lambda.jar','--environment',"Variables={MY_SQL_USERNAME=${mySql.username},MY_SQL_PASSWORD=${encryptedDbPassword},PLATFORM_DB_URL=${"jdbc:mysql://${MY_SQL_HOST_NAME}:3306"}," +
"AWS_REGION=${localStack.region}}"
)
最后,可以在如下测试中手动触发lambda:
localStack.execInContainer('awslocal','invoke','output0.json')