Chapter 13 - Rate limiter route service

sudhathangarajan

Hi @spgreenberg
I deployed web-ui app & roster app (available as rest-backend service and bind to web-ui) . I can add people and view them in web-ui.

Later i deployed rate-limiter app (available as rate-limiter-service and bind to web-ui's route web-ui-hilarious-jackal-jc.mybluemix.net)
cf brs mybluemix.net -n web-ui-hilarious-jackal-jc rate-limiter-service

Once i bind the rate limiter route service then my web-ui's home page, starts giving "502 Bad Gateway: Registered endpoint failed to handle the request."

Could you please advise where i am going wrong ? Thank you.

Below is the env for my web-ui:
System-Provided:
{
"VCAP_SERVICES": {
"user-provided": [
{
"binding_name": null,
"credentials": {
"url": "roster-boring-lemur-oi.mybluemix.net"
},
"instance_name": "rest-backend",
"label": "user-provided",
"name": "rest-backend",
"syslog_drain_url": "",
"tags": [],
"volume_mounts": []
}
]
}
}

{
"VCAP_APPLICATION": {
"application_id": "4425e381-8d68-4fa2-90f9-8ee894d72618",
"application_name": "web-ui",
"application_uris": [
"web-ui-hilarious-jackal-jc.mybluemix.net"
],
"application_version": "db2afb2c-7698-4492-8307-69fe0e7deda0",
"cf_api": "https://api.us-south.cf.cloud.ibm.com",
"limits": {
"disk": 128,
"fds": 16384,
"mem": 128
},
"name": "web-ui",
"organization_id": "58a204c8-c0b1-4013-997b-b26aaa68d953",
"organization_name": "[email protected]",
"process_id": "4425e381-8d68-4fa2-90f9-8ee894d72618",
"process_type": "web",
"space_id": "4f9c4e82-26df-42b3-a31d-7f51337f8005",
"space_name": "dev",
"uris": [
"web-ui-hilarious-jackal-jc.mybluemix.net"
],
"users": null,
"version": "db2afb2c-7698-4492-8307-69fe0e7deda0"
}
}

No user-defined env variables have been set

Running Environment Variable Groups:
BLUEMIX_REGION: ibm:yp:us-south

Staging Environment Variable Groups:
BLUEMIX_REGION: ibm:yp:us-south

Below is the env for my rate-limiter app:
System-Provided:

{
"VCAP_APPLICATION": {
"application_id": "412cf318-ba65-4532-820e-2feb713234af",
"application_name": "rate-limiter",
"application_uris": [
"rate-limiter-sudha.mybluemix.net"
],
"application_version": "c513b2b3-264e-43f6-983a-a1a57a70be4a",
"cf_api": "https://api.us-south.cf.cloud.ibm.com",
"limits": {
"disk": 512,
"fds": 16384,
"mem": 750
},
"name": "rate-limiter",
"organization_id": "58a204c8-c0b1-4013-997b-b26aaa68d953",
"organization_name": "[email protected]",
"process_id": "412cf318-ba65-4532-820e-2feb713234af",
"process_type": "web",
"space_id": "4f9c4e82-26df-42b3-a31d-7f51337f8005",
"space_name": "dev",
"uris": [
"rate-limiter-sudha.mybluemix.net"
],
"users": null,
"version": "c513b2b3-264e-43f6-983a-a1a57a70be4a"
}
}

User-Provided:
SKIP_SSL_VALIDATION: false

Running Environment Variable Groups:
BLUEMIX_REGION: ibm:yp:us-south

Staging Environment Variable Groups:
BLUEMIX_REGION: ibm:yp:us-south

sudhathangarajan

Adding on some more details:
I get 404 when i reach the route service app (http://rate-limiter-sudha.mybluemix.net/), i am not sure whether this is the route cause of my 502 issue.

As per the logs i can see the traffic go from route-service to web-ui but web-ui responds with a 502.

Logs of rate-limiter app
......... x-cf-forwarded-url=[https://web-ui-hilarious-jackal-jc.mybluemix.net/], ........

in next log statement i see http 502
2021-02-04T18:48:56.09+0800 [RTR/21] OUT rate-limiter-sudha.mybluemix.net - [2021-02-04T10:48:55.773456746Z] "GET
/ HTTP/1.1" **502 **0 67 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.
0.4324.104 Safari/537.36" "10.186.136.37:45971" "169.61.175.166:61174" x_forwarded_for:"183.90.49.222,169.61.155.170,
10.186.136.37" x_forwarded_proto:"https" vcap_request_id:"233d4a75-4d84-466b-5b22-9995665fa9c0" response_time:0.3210
63 gorouter_time:0.000354 app_id:"412cf318-ba65-4532-820e-2feb713234af" app_index:"0" x_cf_routererror:"endpoint_fail
ure" x_global_transaction_id:"075554b2601bd117da7c65b7" true_client_ip:"-" x_b3_traceid:"dbeed0304427a86b" x_b3_spani
d:"dbeed0304427a86b" x_b3_parentspanid:"-" b3:"dbeed0304427a86b-dbeed0304427a86b"
2021-02-04T18:48:56.09+0800 [RTR/21] OUT

Logs of web-ui app
in web-ui i see http 200
2021-02-04T18:48:56.07+0800 [RTR/16] OUT web-ui-hilarious-jackal-jc.mybluemix.net - [2021-02-04T10:48:56.003899496
Z] "GET / HTTP/1.1" **200 **0 278 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) C
hrome/88.0.4324.104 Safari/537.36" "10.184.41.3:26688" "169.46.106.246:61228" x_forwarded_for:"183.90.49.222,169.61.1
55.170,169.61.175.166, 10.184.41.3" x_forwarded_proto:"https" vcap_request_id:"2d0273c5-7c3d-42ca-6f26-4cda11c267a1"
response_time:0.071241 gorouter_time:0.000431 app_id:"4425e381-8d68-4fa2-90f9-8ee894d72618" app_index:"0" x_cf_router
error:"-" x_global_transaction_id:"075554b2601bd117da7c65b7" true_client_ip:"-" x_b3_traceid:"dbeed0304427a86b" x_b3_
spanid:"3703ffaa5fdbeff3" x_b3_parentspanid:"dbeed0304427a86b" b3:"dbeed0304427a86b-dbeed0304427a86b"
2021-02-04T18:48:56.07+0800 [RTR/16] OUT