agutoli / Serverless Layers
Licence: mit
Serverless.js plugin that implements AWS Lambda Layers which reduces drastically lambda size, warm-up and deployment time.
Stars: ✭ 119
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serverless-layers
- It attaches automatically layers for each function
- It creates a new layer's version when
dependencies
is updated - If
dependencies
is not changed, it does not publish a new layer - It reduces drastically lambda size
- It reduces deployment time.
- You can share same layers (libraries) among all lambda functions
Options
Common requirements
- AWS only (sorry)
- Serverless >= 1.34.0 (layers support)
Install
npm install -D serverless-layers
or
serverless plugin install --name serverless-layers
Add the plugin to your serverless.yml
file:
Single layer config
Example:
plugins:
- serverless-layers
custom:
serverless-layers:
functions: # optional
- my_func2
dependenciesPath: ./package.json
functions:
my_func1:
handler: handler.hello
my_func2:
handler: handler.hello
Multiple layers config
Example:
plugins:
- serverless-layers
custom:
serverless-layers:
# applies for all lambdas
- common:
dependenciesPath: ./my-folder/package.json
# apply for foo only
- foo:
functions:
- foo
dependenciesPath: my-folder/package-foo.json
- staticArn:
functions:
- foo
- bar
arn: arn:aws:lambda:us-east-1:<your_account>:layer:node-v13-11-0:5
functions:
foo:
handler: handler.hello
bar:
handler: handler.hello
Option | Type | Default | Description |
---|---|---|---|
compileDir | string |
.serverless | Compilation directory |
layersDeploymentBucket | string |
You can specify a bucket to upload lambda layers. Required if deploymentBucket is not defined.
|
|
customInstallationCommand | string |
It specify a custom command to install deps ex. MY_ENV=1 npm --proxy http://myproxy.com i -P
|
NodeJS
Requirements
- Node >= v6.10.3
- NPM >= 3.10.10
- A valid package.json file
Options
Option | Type | Default | Description |
---|---|---|---|
packageManager | string |
npm | Possible values: npm, yarn |
packagePath | string |
package.json |
(DEPRECATED) : Available for <= 1.5.0 , for versions >= 2.x please use compatibleRuntimes
|
dependenciesPath | string |
package.json | Note: >= 2.x versions. You can specify custom path for your package.json |
compatibleRuntimes | array |
['nodejs'] |
Possible values: nodejs, nodejs10.x, nodejs12.x |
Ruby
Requirements
- Ruby >= 2.5
- A valid Gemfile file
Options
Option | Type | Default | Description |
---|---|---|---|
packageManager | string |
bundle | Possible values: bundle |
dependenciesPath | string |
Gemfile | Note: Available for >= 2.x versions. You can specify custom path for your requirements.txt |
compatibleRuntimes | array |
['ruby'] |
Possible values: ruby2.5, ruby2.7 |
Python
Requirements
- Python >= 2.7
- A valid requirements.txt file
Options
Option | Type | Default | Description |
---|---|---|---|
packageManager | string |
pip | Possible values: pip |
dependenciesPath | string |
requirements.txt | Note: Available for >= 2.x versions. You can specify custom path for your requirements.txt |
compatibleRuntimes | array |
['python'] |
Possible values: python2.7, python3.6, python3.7 and python3.8 |
Default Serverless Setup
This plugin will setup follow options automatically if not specified at serverless.yml
.
Option | Type | Default |
---|---|---|
package.individually | bool |
false |
package.exclude | array |
['node_modules/**'] |
package.excludeDevDependencies | bool |
false |
Mininal Policy permissions for CI/CD IAM users
serverless-layers-policy.json
{
"Version":"2012-10-17",
"Statement":[
{
"Effect":"Allow",
"Action":[
"s3:PutObject",
"s3:GetObject"
],
"Resource": "arn:aws:s3:::examplebucket"
},
{
"Effect":"Allow",
"Action":[
"cloudformation:DescribeStacks"
],
"Resource": "*"
},
{
"Effect":"Allow",
"Action":[
"lambda:PublishLayerVersion"
],
"Resource": "*"
}
]
}
Contributing
Yes, thank you! This plugin is community-driven, most of its features are from different authors. Please update the docs and tests and add your name to the package.json file. We try to follow Airbnb's JavaScript Style Guide.
License
MIT
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