Unable to understand the checks statistics in the console outout

Grafana k6 OSS Support
1

I am working on a script which connects to influxdb hosted on a separate linux server and there is a layer of ingress in between k6 and influxdb. Whenever I run the scripts I get the below two messages

WARN[0058] The flush operation took higher than the expected set push interval. If you see this message multiple times then the setup or configuration need to be adjusted to achieve a sustainable rate. output=InfluxDBv1 t=11.915723758s
ERRO[0058] Couldn’t write stats error=“{"error":"timeout"}\n” output=InfluxDBv1

Below is my setup for K6 in a docker compose

k6_crud_tests:
container_name: crud_tests
image: grafana/k6:latest
ports:
- “6568:6568”
environment:
- K6_OUT=influxdb=https://myinfluxdb/k6
- K6_INFLUXDB_CONCURRENT_WRITES=6
volumes:
- ./scripts:/scripts
- ./utilities:/utilities
- ./config:/config
command: run //scripts//CRUD_Tests.js

and below are the env var for influxdb

  • INFLUXDB_DB=k6
  • INFLUXDB_DATA_MAX_SERIES_PER_DATABASE=0
  • INFLUXDB_DATA_MAX_VALUES_PER_TAG=0
  • INFLUXDB_HTTP_MAX_BODY_SIZE=90000000

the ingress is also configured to set the body size to 90000000

Any ideas how can I get rid of these two messages pls?
Thank you!

3

Hi @21.prash,
the timeout error says to you that from the k6 container is not possible to reach the provided InfluxDB endopoint.

You should check your docker’s networking/connectivity configuration in your infrastructure. It could help to replicate the infrastructure in local before. You can find a docker compose for doing it in the k6 repository.

I hope it helps you.

4

Hello @codebien - This error comes locally as well when I run it inside docker compose. Locally there is nothing between K6 and influxdb

ERRO[0233] Couldn’t write stats error=“{"error":"timeout"}\n” output=InfluxDBv1
ERRO[0234] Couldn’t write stats error=“{"error":"timeout"}\n” output=InfluxDBv1
ERRO[0235] Couldn’t write stats error=“{"error":"timeout"}\n” output=InfluxDBv1
ERRO[0236] Couldn’t write stats error=“{"error":"timeout"}\n” output=InfluxDBv1
ERRO[0237] Couldn’t write stats error=“{"error":"timeout"}\n” output=InfluxDBv1
ERRO[0238] Couldn’t write stats error=“{"error":"timeout"}\n” output=InfluxDBv1

function prepareHeader(token)
{
return {
headers: { “Content-Type” : “application/json”, “Authorization” : "Bearer " + token },
timeout: “4m”
};
}

export function DeleteItem(item, token)
{
let res = http.del(appUrl + item, null, prepareHeader(token));
return res;
}

Am I doing something wrong here??

Thank you!

5

Did you use the same docker compose configuration I shared?

Have you checked if the k6’s container is configured in the proper way to connect to InfluxDB’s container? For example, are you able to manually establish a connection?
If you don’t know how to do it, you can learn how to set proper connectivity in Docker from the documentation Networking with standalone containers | Docker Documentation.

6

Below is my compose file with the config details…

version: '3.7'

networks:
  default:
    name: my-api-network

services:
  influxdb:
    image: influxdb:1.8
    restart: always
    ports:
      - "8086:8086"
    environment:
      - INFLUXDB_DB=k6
      - INFLUXDB_DATA_MAX_SERIES_PER_DATABASE=0
      - INFLUXDB_DATA_MAX_VALUES_PER_TAG=0
      - INFLUXDB_HTTP_MAX_BODY_SIZE=50000000

  grafana:
    depends_on:
      - influxdb
    image: grafana/grafana:latest
    restart: always
    ports:
      - "3000:3000"
    environment:
      - GF_AUTH_ANONYMOUS_ORG_ROLE=Admin
      - GF_AUTH_ANONYMOUS_ENABLED=true
      - GF_AUTH_BASIC_ENABLED=false
    volumes:
      - ./grafana:/etc/grafana/provisioning/

  k6_crud_tests:
    depends_on:
      - grafana
    image: grafana/k6:latest
    ports:
      - "6568:6568"
    environment:
      - K6_OUT=influxdb=http://influxdb:8086/k6
      - K6_INFLUXDB_CONCURRENT_WRITES=6

    volumes:
      - ./tests/scripts:/scripts
      - ./tests/utilities:/utilities
      - ./tests/config:/config
    command: run //scripts//CRUD_Tests.js
7

Hi @21.prash,
I don’t see any specific issue with your docker compose config. Can you try to run a simple script like this from the k6 repository, please?

I got your configuration running as expected with that http_get.js script. Which command are you using for running the containers?

Let me know.

9

Its working fine now. The Devops Team did some changes at the influxdb and grafana side and it works like a charm! Thank you!