Deploying node.js lambda with AWS CDK python - node.js

Question

I try to deploy node.js lambda function with CDK python. Unfortunately, I cannot find any tutorials for this combination. Here is what I did.
mkdir hello
cd hello
cdk init app --language python
virtualenv -p python3.7 env
source env/bin/activate
pip install -r requirements.txt
(edit ./app.py and ./code/hello.js)
cdk diff
Then I got the following error. How can I solve this problem?
File "app.py", line 24, in <module>
HelloStack(app, "HelloStack")
File "/home/bitnami/hello/env/lib/python3.7/site-packages/jsii/_runtime.py", line 86, in __call__
inst = super().__call__(*args, **kwargs)
File "app.py", line 20, in __init__
entry="./code/hello.js"
File "/home/bitnami/hello/env/lib/python3.7/site-packages/jsii/_runtime.py", line 86, in __call__
inst = super().__call__(*args, **kwargs)
File "/home/bitnami/hello/env/lib/python3.7/site-packages/aws_cdk/aws_lambda_nodejs/__init__.py", line 1307, in __init__
jsii.create(self.__class__, self, [scope, id, props])
File "/home/bitnami/hello/env/lib/python3.7/site-packages/jsii/_kernel/__init__.py", line 297, in create
for iface in getattr(klass, "__jsii_ifaces__", [])
File "/home/bitnami/hello/env/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 344, in create
return self._process.send(request, CreateResponse)
File "/home/bitnami/hello/env/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 326, in send
raise JSIIError(resp.error) from JavaScriptError(resp.stack)
jsii.errors.JSIIError: Cannot find a package lock file (`pnpm-lock.yaml`, `yarn.lock` or `package-lock.json`). Please specify it with `depsLockFilePath`.
Here are the files.
app.py
#!/usr/bin/env python3
import os
import aws_cdk as cdk
from aws_cdk import (
# Duration,
Stack,
aws_lambda_nodejs as lamjs,
)
from constructs import Construct
class HelloStack(Stack):
def __init__(self, scope: Construct, construct_id: str, **kwargs) -> None:
super().__init__(scope, construct_id, **kwargs)
helloFn = lamjs.NodejsFunction(
self,"hello",
entry="./code/hello.js"
);
app = cdk.App()
HelloStack(app, "HelloStack")
app.synth()
code/hello.js
exports.handler = async(event, context) => {
return 1;
};
Here is my environment.
cdk --version
2.24.1 (build 585f9ca)
npm --version
6.14.15
--- Update on May 25, 2022 ---
I added the following package.json in the hello directory and ran "npm install".
package.json
{
"name": "hello",
"version": "0.1.0",
"bin": {
"hello": "code/hello.js"
},
"scripts": {
"build": "tsc",
"watch": "tsc -w",
"test": "jest",
"cdk": "cdk"
},
"devDependencies": {
"#types/jest": "^27.5.0",
"#types/node": "10.17.27",
"#types/prettier": "2.6.0",
"jest": "^27.5.1",
"ts-jest": "^27.1.4",
"aws-cdk": "2.24.1",
"ts-node": "^10.7.0",
"typescript": "~3.9.7"
},
"dependencies": {
"aws-cdk-lib": "2.24.1",
"constructs": "^10.0.0",
"source-map-support": "^0.5.21"
}
}
This makes package-lock.json and then I ran "cdk diff". Then I got the following error.
jsii.errors.JavaScriptError:
Error: spawnSync docker ENOMEM
at Object.spawnSync (internal/child_process.js:1077:20)
at Object.spawnSync (child_process.js:776:24)
at dockerExec (/tmp/jsii-kernel-LhoMqm/node_modules/aws-cdk-lib/core/lib/bundling.js:1:4968)
at Function.fromBuild (/tmp/jsii-kernel-LhoMqm/node_modules/aws-cdk-lib/core/lib/bundling.js:1:3553)
at new Bundling (/tmp/jsii-kernel-LhoMqm/node_modules/aws-cdk-lib/aws-lambda-nodejs/lib/bundling.js:1:2057)
at Function.bundle (/tmp/jsii-kernel-LhoMqm/node_modules/aws-cdk-lib/aws-lambda-nodejs/lib/bundling.js:1:2947)
at new NodejsFunction (/tmp/jsii-kernel-LhoMqm/node_modules/aws-cdk-lib/aws-lambda-nodejs/lib/function.js:1:1361)
at /tmp/tmp5utwlvy5/lib/program.js:8420:58
at Kernel._wrapSandboxCode (/tmp/tmp5utwlvy5/lib/program.js:8848:24)
at Kernel._create (/tmp/tmp5utwlvy5/lib/program.js:8420:34)
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "app.py", line 24, in <module>
HelloStack(app, "HelloStack")
File "/home/bitnami/hello/env/lib/python3.7/site-packages/jsii/_runtime.py", line 86, in __call__
inst = super().__call__(*args, **kwargs)
File "app.py", line 20, in __init__
entry="./code/hello.js"
File "/home/bitnami/hello/env/lib/python3.7/site-packages/jsii/_runtime.py", line 86, in __call__
inst = super().__call__(*args, **kwargs)
File "/home/bitnami/hello/env/lib/python3.7/site-packages/aws_cdk/aws_lambda_nodejs/__init__.py", line 1307, in __init__
jsii.create(self.__class__, self, [scope, id, props])
File "/home/bitnami/hello/env/lib/python3.7/site-packages/jsii/_kernel/__init__.py", line 297, in create
for iface in getattr(klass, "__jsii_ifaces__", [])
File "/home/bitnami/hello/env/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 344, in create
return self._process.send(request, CreateResponse)
File "/home/bitnami/hello/env/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 326, in send
raise JSIIError(resp.error) from JavaScriptError(resp.stack)
jsii.errors.JSIIError: spawnSync docker ENOMEM
How can I solve this issue?

Answer 1

From the docs:
The NodejsFunction requires a dependencies lock file (yarn.lock, pnpm-lock.yaml or package-lock.json). When bundling in a Docker container, the path containing this lock file is used as the source (/asset-input) for the volume mounted in the container.
So you would need your lambda folder to have a lock file in one of the supported formats.