K6 REST API update setup

Grafana k6 OSS Support
1

I have given options as

export const options = {
    scenarios: {
        scenario_1:{
            executor: "externally-controlled",
            duration: "10m",
            vus : 2
        }
    }
}

And default function as

export default function(data){
  console.log(data.v)
}

when I run the test output on screen is 1

Then I used curl in another terminal

curl -X PUT \ 
  http://localhost:6565/v1/setup \
  -H 'Content-Type: application/json' \
  -d '{
    "data": {
        "attributes": {
            "data":{"v":3}
        },
        "id": "default",
        "type": "setupData"
    }
}

Then also value 1 is printed in screen… I expected 3 will get printed. Could anyone share the reason and correction?

2

Hi @ge_orgejoseph.

Have you tried using the scale command, if no please check this link.

3

Hi @rdt.one Thats working fine… I need to update the setup function while test is running.

5

Could you please post here the response you get from the APi when you perform the curl PUT action?

6

@rdt.one

curl -X PUT \ 
  http://localhost:6565/v1/setup \
  -H 'Content-Type: application/json' \
  -d '{
    "data": {
        "attributes": {
            "data":{"v":3}
        },
        "id": "default",
        "type": "setupData"
    }
}'


After execution of above --
{"data":{"type":"setupData","id":"default","attributes":{"data":{"data":{"attributes":{"data":{"v":3}},"id":"default","type":"setupData"}}}}}%

In k6 script

let di = { v:2}

export function setup(){
    
    return di
}
export const options = {
    scenarios: {
        scenario_1:{
            executor: "externally-controlled",
            duration: "10m",
            vus : 2
            
        }
    }
}
7

Hi @ge_orgejoseph !

I believe what is important is also to run the k6 with the --no-setup flag.

For example given a script.js:

export default function(data){
   console.log(data.v)
}

Then run the k6

k6 run --no-setup --paused

After that

curl -X PUT -d '{"v":"Hi there!"}' http://127.0.0.1:6565/v1/setup

And once I resume, I can see:

INFO[0008] Hi there!                                     source=console

Let me know if that helps!
Cheers

9

Hi @olegbespalov

When we use
k6 run --no-setup --paused
It will not run setup in beginning and it stops there

curl -X PUT -d '{"v":"Hi there!"}' http://127.0.0.1:6565/v1/setup
When we apply this and resume Hi there! is printed.

Now plz do the same `curl -X PUT -d ‘{“v”:“Welcome”}’ http://127.0.0.1:6565/v1/setup

For me it doesn’t make any change.

10

Do you mean to execute the change when k6 is running? :thinking:

11

Exactly. change when k6 is running

12

Exactly. change when k6 is running

I’m afraid that’s not possible to change the setup data during the running :slightly_frowning_face: