Unable to setup base domain behind HTTP proxy

[jamesmbourne]

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Bug Report

Error Description
Creating a custom domain behind a HTTP proxy fails.

Command Run
sls deploy

Console Output

Error --------------------------------------------------

Error: Error: Unable to setup base domain mappings for (obfuscated)
    at ServerlessCustomDomain.<anonymous> (/app/node_modules/serverless-domain-manager/dist/index.js:164:27)
    at Generator.throw (<anonymous>)
    at rejected (/app/node_modules/serverless-domain-manager/dist/index.js:6:65)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)

    For debugging logs, run again after setting the "SLS_DEBUG=*" environment variable.

Domain Manager Configuration
Replace this with your own serverless.yml file (anonymized, of course) to help us better resolve your issue.

customDomain:
  domainName: ${self:custom.vars.domains.${self:provider.stage}}
  basePath: foo
  createRoute53Record: false
  endpointType: regional
  securityPolicy: tls_1_2

Versions

• Domain Manager version(s): v4.2.3

Possible Solution

Reverting to 4.2.0 resolved the issue. It seems this recent change has changed the CloudFormation provider not to inherit from the Serverless configured AWS SDK.

Serverless Framework is responsible for passing a proxy-agent through to the SDK and configuring this according to the proxy specified in HTTP_PROXY etc. It seems this approach was originally proposed in #86 & implemented in #89.

Additional context/Screenshots
The attempt to make a CloudFormation API call was the only one to fail - all other steps in the deployment succeeded. This aligns with the recent change in #380 to refactor the CloudFormation client.