Serverless lambda Global Environmental Variables - amazon-web-services

Question

I am playing with serverless, and I am trying to figure out how to rewrite this serverless.yml file so I don't duplicate the environmental variables for each function. Is there a way to set environmental variables globally?
service: test-api
frameworkVersion: ">=1.2.0 <2.0.0"
provider:
name: aws
runtime: nodejs12.x
timeout: 30
stage: dev
memorysize: 2048
region: us-east-2
logRetentionInDays: 21
functions:
doCreate:
handler: functions/do-create.handler
environment:
DB_PORT: ${ssm:/${self:custom.stage}/db_port}
DB_URL: ${ssm:/${self:custom.stage}/db_url}
API_KEY: ${ssm:/${self:custom.stage}/api_key}
ENV: "${self:custom.stage}"
SEARCH_ARN: ${ssm:/${self:custom.stage}/search_arn}
doUpdate:
handler: functions/do-update.handler
environment:
DB_PORT: ${ssm:/${self:custom.stage}/db_port}
DB_URL: ${ssm:/${self:custom.stage}/db_url}
API_KEY: ${ssm:/${self:custom.stage}/api_key}
ENV: "${self:custom.stage}"
SEARCH_ARN: ${ssm:/${self:custom.stage}/search_arn}

Answer 1

You just simply move them into the provider section. They will be applied to all functions in the same service.
service: test-api
frameworkVersion: ">=1.2.0 <2.0.0"
provider:
name: aws
runtime: nodejs12.x
timeout: 30
stage: dev
memorysize: 2048
region: us-east-2
logRetentionInDays: 21
environment:
DB_PORT: ${ssm:/${self:custom.stage}/db_port}
DB_URL: ${ssm:/${self:custom.stage}/db_url}
API_KEY: ${ssm:/${self:custom.stage}/api_key}
ENV: "${self:custom.stage}"
SEARCH_ARN: ${ssm:/${self:custom.stage}/search_arn}
functions:
doCreate:
handler: functions/do-create.handler
doUpdate:
handler: functions/do-update.handler

Answer 2

Use the Globals section in the SAM template
Globals:
Function:
Runtime: nodejs12.x
Timeout: 180
Handler: index.handler
Environment:
Variables:
TABLE_NAME: data-table
For more details please go through this document https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-specification-template-anatomy-globals.html