Serverless Naver Cloud Plugin

This plugin enables Naver CloudFunctions support within the Serverless Framework.

Getting Started

Register account with Naver Cloud

Before you can deploy your service to Naver Cloud, you need to have an account registered.

Set up account credentials

Use the following environment variables to be pass in account credentials.

• NCLOUD_ACCESS_KEY
• NCLOUD_SECRET_KEY

Create Service From template

TODO

Need to deploy to specific region?

Ensure you set the region option in the serverless.yaml prior to deployment. Default value for this option is kr.

provider:
  name: navercloud
  region: jp

Supported regions are

• kr
• jp
• sg
• gov
• fin

Deploy Service

serverless deploy

Test Service

Once you deployed functions with serverless deploy, you can also invoke the functions with the following CLI.

serverless invoke -f <functionName>

Invoke Options

• -f or --function - Function to Invoke
• --timeout
  • Set the timeout of http call to invoke function in ms
  • With too short timeout, you may see only activationId without the result of invoking function
  • Default value for this option is 60000
• --verbose
  • With this option, serverless framework shows all the result of invoking function
• -d or --data
  • Specify runtime parameters of deployed functions to invoke
  • String data in JSON format
• -p or --path
  • Specify the path to a JSON file which has input data to be passed to a function
  • Support both absolute path and relative path

Example

serverless invoke -f hello

serverless invoke -f hello --timeout 10000

serverless invoke -f hello --verbose

serverless invoke -f hello --verbose --timeout 30000

serverless invoke -f hello -d '{"name":"Naver Cloud"}'

serverless invoke -f hello -p ./data.json

You may also pass input data from stdin to a function. The data should be a string in JSON format.

echo '{"name":"Naver Cloud"}' | serverless invoke -f hello 

Writing Functions - Node.js

Here's an index.js file containing an example handler function.

function main(params) {
  const name = params.name || 'World';
  return {payload:  'Hello, ' + name + '!'};
};

exports.main = main;

Modules should return the function handler as a custom property on the global exports object.

functions:
        my_function:
                handler: index.main
runtime: nodejs:12

Using NPM Modules

NPM modules must be installed locally in the node_modules directory before deployment. This directory will be packaged up in the deployment artefact. Any dependencies included in node_modules will be available through require() in the runtime environment.

const leftPad = require("left-pad")

function pad_lines(args) {
  const lines = args.lines || [];
  return { padded: lines.map(l => leftPad(l, 30, ".")) }
};

exports.handler = pad_lines;

Writing Functions - Python

Here's an index.py file containing an example handler function.

def endpoint(params):
    name = params.get("name", "stranger")
    greeting = "Hello " + name + "!"
    print(greeting)
    return {"greeting": greeting}

In the serverless.yaml file, the handler property is used to denote the source file and module property containing the serverless function.

functions:
  my_function:
    handler: index.endpoint
    runtime: python:3.6

Deleting a Service

serverless remove

Logging

If you want to see invocation logs or function stdout/stderr log of your function, you can also run logs CLI.

serverless logs -f <functionName>

Logs Options

• --pageNo
  • Set which page to retrieve
  • Default value for this option is 1
• --pageSize
  • Set the number of logs to fit on a page
  • Default value for this option is 20
• --start
  • Set the starting point of the logs to retrieve
  • KST for KR region / SST for SG region
• --end
  • Set the end point of the logs to retrieve
  • KST for KR region / SST for SG region
• -t or --tail
  • Defines whether serverless framework keeps waiting for new logs
  • If new logs fit to the options generated, serverless framework shows them.

Example

serverless logs -f hello

serverless logs -f hello --pageNo 2 --pageSize 3

serverless logs -f hello --start 2022-12-15T15:00:00 --end 2022-12-15T16:30:00

serverless logs -f hello --tail

serverless logs -f hello --pageNo 2 --end 2022-12-15T14:00:00 -t

Acknowledgement

This Library contains some code from the projects below

• https://github.com/serverless/serverless-azure-functions (MIT license)
• https://github.com/serverless/serverless-openwhisk (MIT license)

License

Copyright 2023-present NAVER Cloud Corp.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.