Load generator without frontend service

[sudhirkumar05]

I am trying to start load generator without the frontend service(headless) but getting 404 error. Can any one guide me how to run the load generator headless.
These are the steps i followed

1. Run a collector which receive request on 4318, http://localhost:4318/v1/traces
2. Install Locust locally
3. Below environment variable has been set

export LOCUST_WEB_PORT=8089
export LOCUST_USERS=10
export LOCUST_HOST="frontend:8080"
export LOCUST_WEB_HOST=loadgenerator
export LOCUST_HEADLESS=true
export OTEL_EXPORTER_OTLP_TRACES_ENDPOINT="http://localhost:4318/v1/traces"
export OTEL_RESOURCE_ATTRIBUTES="service.namespace=platform-opentelemetry"
export OTEL_SERVICE_NAME="otel-loadgenerator"
export PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python

4. start locust with this command line locust -f locustfile.py -H http://localhost:4318/v1/traces --headless -u 100 -r 5. Please note that if i use some other url with -H option i get an error No connection adapters were found for 'frontend:8080/ from the collector side
5. Collector output shows 404 transaction and the locust logs shows failed transaction

locust -f locustfile.py -H http://localhost:4318/v1/traces --headless -u 100 -r 5
[2023-02-27 12:23:28,521] C02FVFZ2MD6M/INFO/locust.main: No run time limit set, use CTRL+C to interrupt
[2023-02-27 12:23:28,521] C02FVFZ2MD6M/INFO/locust.main: Starting Locust 2.14.2
Type     Name                                                                          # reqs      # fails |    Avg     Min     Max    Med |   req/s  failures/s
--------|----------------------------------------------------------------------------|-------|-------------|-------|-------|-------|-------|--------|-----------
--------|----------------------------------------------------------------------------|-------|-------------|-------|-------|-------|-------|--------|-----------
         Aggregated                                                                         0     0(0.00%) |      0       0       0      0 |    0.00        0.00

[2023-02-27 12:23:28,522] C02FVFZ2MD6M/INFO/locust.runners: Ramping to 100 users at a rate of 5.00 per second
Type     Name                                                                          # reqs      # fails |    Avg     Min     Max    Med |   req/s  failures/s
--------|----------------------------------------------------------------------------|-------|-------------|-------|-------|-------|-------|--------|-----------
GET      /v1/traces/                                                                       10  10(100.00%) |     31      10      50     16 |    0.00        0.00
GET      /v1/traces/api/cart                                                                3   3(100.00%) |      6       4       9      7 |    0.00        0.00
GET      /v1/traces/api/data/?contextKeys=accessories                                       1   1(100.00%) |      7       7       7      7 |    0.00        0.00
GET      /v1/traces/api/data/?contextKeys=assembly                                          1   1(100.00%) |      6       6       6      6 |    0.00        0.00
GET      /v1/traces/api/data/?contextKeys=books                                             1   1(100.00%) |      6       6       6      6 |    0.00        0.00
GET      /v1/traces/api/data/?contextKeys=travel                                            1   1(100.00%) |      4       4       4      4 |    0.00        0.00
GET      /v1/traces/api/products/9SIQT8TOJO                                                 3   3(100.00%) |      6       3       9      6 |    0.00        0.00
GET      /v1/traces/api/products/HQTGWGPNH4                                                 1   1(100.00%) |      6       6       6      6 |    0.00        0.00
GET      /v1/traces/api/products/L9ECAV7KIM                                                 1   1(100.00%) |      4       4       4      4 |    0.00        0.00
--------|----------------------------------------------------------------------------|-------|-------------|-------|-------|-------|-------|--------|-----------
         Aggregated                                                                        22  22(100.00%) |     17       3      50      9 |    0.00        0.00

Type     Name                                                                          # reqs      # fails |    Avg     Min     Max    Med |   req/s  failures/s
--------|----------------------------------------------------------------------------|-------|-------------|-------|-------|-------|-------|--------|-----------
GET      /v1/traces/                                                                       20  20(100.00%) |     22       7      50     15 |    5.00        5.00
GET      /v1/traces/api/cart                                                                3   3(100.00%) |      6       4       9      7 |    1.50        1.50
POST     /v1/traces/api/cart                                                                3   3(100.00%) |      3       3       3      3 |    0.00        0.00
POST     /v1/traces/api/checkout                                                            1   1(100.00%) |      2       2       2      2 |    0.00        0.00
GET      /v1/traces/api/data/?contextKeys=accessories                                       1   1(100.00%) |      7       7       7      7 |    0.50        0.50
GET      /v1/traces/api/data/?contextKeys=assembly                                          1   1(100.00%) |      6       6       6      6 |    0.50        0.50
GET      /v1/traces/api/data/?contextKeys=books                                             2   2(100.00%) |      4       3       6      3 |    0.50        0.50
GET      /v1/traces/api/data/?contextKeys=travel                                            2   2(100.00%) |      5       4       5      5 |    0.50        0.50
GET      /v1/traces/api/products/0PUK6V6EV0                                                 3   3(100.00%) |      8       4      12      9 |    0.00        0.00
GET      /v1/traces/api/products/2ZYFJ3GM2N                                                 1   1(100.00%) |      7       7       7      7 |    0.00        0.00
GET      /v1/traces/api/products/66VCHSJNUP                                                 2   2(100.00%) |      3       3       3      3 |    0.00        0.00
GET      /v1/traces/api/products/9SIQT8TOJO                                                 4   4(100.00%) |      6       3       9      5 |    1.50        1.50
GET      /v1/traces/api/products/HQTGWGPNH4                                                 2   2(100.00%) |      5       4       6      5 |    0.50        0.50
GET      /v1/traces/api/products/L9ECAV7KIM                                                 2   2(100.00%) |      4       4       4      4 |    0.50        0.50
GET      /v1/traces/api/products/LS4PSXUNUM                                                 1   1(100.00%) |      6       6       6      6 |    0.00        0.00
GET      /v1/traces/api/recommendations/?productIds=6E92ZMYYFZ                              1   1(100.00%) |      5       5       5      5 |    0.00        0.00
GET      /v1/traces/api/recommendations/?productIds=L9ECAV7KIM                              1   1(100.00%) |      4       4       4      4 |    0.00        0.00
--------|----------------------------------------------------------------------------|-------|-------------|-------|-------|-------|-------|--------|-----------
         Aggregated                                                                        50  50(100.00%) |     12       2      50      7 |   11.00       11.00

[puckpuck]

Your command to start locust is incorrect. Really if you set all the environment variables, you don't need any of the arguments, but this argument is your issue:

-H http://localhost:4318/v1/traces

-H is equivalent to LOCUST_HOST and thus should be set to the frontend

-H frontend:8080