Serverless command "offline" not found

Question

I am running my nodejs code and also installed serverless(npm i -g serverless) but while running it with the command sls offline start --CacheInvalidations I am getting error as:-

Serverless Error ---------------------------------------

Serverless command "offline" not found. Did you mean "config"? Run "serverless help" for a list of all available commands.

Get Support --------------------------------------------

 Docs:          docs.serverless.com
 Bugs:          github.com/serverless/serverless/issues
 Issues:        forum.serverless.com

Your Environment Information ---------------------------

 Operating System:          linux
 Node Version:              12.18.2
 Framework Version:         1.79.0
 Plugin Version:            3.7.1
 SDK Version:               2.3.1
 Components Version:        2.34.6

Adalie

In my case, I had the module correctly under node_modules and still it was not working. I found the issue that I was executing the command >sls offline start from the base application folder, but you have to execute the command from the SERVICE_FOLDER. Hope this might help somebody.... – Teferi

in my case i had to run sudo npm install serverless -g and worked like a charm – Rhodos

Answer 1

You need to install the serverless-offline plugin using npm in order to use sls offline command.

Just simply run:

npm i -g serverless-offline

to install globally on your device or

npm i serverless-offline --save-dev

to install it as a development dependency in the active project. and then add this configuration to your serverless template:

plugins:
  - serverless-offline

For more information on serverless-offline plugin take a look at serverless official documents:

Serverless Offline | Emulate AWS λ and API Gateway locally when developing your Serverless project

Serverless Offline NPM

Effluvium

make sure you hit save on your serverless template, I'm used to work with auto saving IDE, so when I switched to something else I forgot to save after adding the plugin – Authenticity

ok, one more important thing is that serverless.yaml has to be in the same folder where the node_modules folder is – Juieta

@Madeo but serverless generally while creating a project it's going to create folder right, can we point out the plugin to refer one folder up is that possible ? – Blacksmith

I had the same problem, the serverless.yml was in src instead in the root project. 30 minutes lost forever – Worthy

Answer 2

I was facing the same issue while setting up serverless.yml with nodejs and running it on local. Two steps resolved the problem.

1. Install serverless-offline package globally.

npm i -g serverless-offline

2. Add the same package under the plugin key of your serverless.yml file.

plugins:
- serverless-offline

Pipsissewa

Answer 3

Installing the dependency with yarn you can run the command typing the following:

Install:

yarn add serverless-offline -D

Run:

yarn serverless offline start

Pharmacognosy

Answer 4

There is another way to try with

 npx serverless plugin install --name serverless-offline

this is for install serverless-offline plugin. you also can view available plugin names bu

npx sls plugin list 

Measure

Answer 5

You have to install the package (or locally in your project or globally). I do recommend install globally.

npm i -g serverless-offline

or

yarn global add serverless-offline

Inside your serverless.yml file, add in the plugins session the following code:

plugins:

• serverless-offline

It will sove your problem

Spermophile

Answer 6

Not sure if you solved this issue but I was having the same problem, for me it was a silly error, the indentation of the YML file was wrong, after fixing the indentation it started to work just fine

Endopeptidase

Answer 7

First, you have to install serverless offline globally.

npm i -g serverless-offline

Next, you should check a serverless.yml file. Otherwise, you must create a serverless.yml file.

service: your-service-name
app: app-name
provider:
  name: aws
  runtime: nodejs10.x
  timeout: 60
  memorySize: 128
  deploymentBucket: bucket-name
# you can overwrite defaults here
  stage: prod
  region: your-aws-region
functions:
  your-function-name:
    handler: handler.dispatch
    memorySize: 128
    timeout: 60
    events:
      #- http: POST /hello
      - http: 'ANY {proxy+}'
plugins:
  - serverless-offline
  - serverless-aws-alias

Mccarter

Answer 8

1. make sure serverless-offline is installed (globaly or at the project)
2. Add these lines to serverless.yml

plugins:
  # Needed to run & debug locally
  - serverless-offline

Dusk

Answer 9

Try in your project with the npx prefix. So npx sls offline or npx serverless offline. It worked for me.

Peyton