Update Lambda function configuration, specifically the environment variables. AWS Cli version aws-cli/1.11.20

gistfile1.sh

 #quotes on json, single around entire object and double on each property
 aws lambda update-function-configuration  --function-name=[lambda function name] --environment '{"Variables":{"abc":"124"}}'

Thanks! I was going nuts with their documentation!
This doesn't work:

Variables={KeyName1=string,KeyName2=string}

And this is missing a key little part which you noted:

{
  "Variables": {"string": "string"
    ...}
}

I ran into this too! Thanks for posting this workaround.

I filed an issue here: aws/aws-cli#2638

We are calling update-function-configuration from an npm script and ran into issues around quotes.
I thought I would share the eventual thing that worked.
Note the single quotes around the $npm_config vars.

    "postsync": "aws lambda update-function-configuration --function-name $npm_config_lambda --environment '{\"Variables\":{\"envtype\":\"'$npm_config_envtype'\",\"domain\":\"'$npm_config_domain'\"}}'"