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fix(app/bedrock-smartllm-backend): start prometheus_client server on 9100 so ServiceMonitor scrape works #57

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Merged
JLCode-tech merged 1 commit into from
May 3, 2026
Merged

fix(app/bedrock-smartllm-backend): start prometheus_client server on 9100 so ServiceMonitor scrape works #57

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12 changes: 11 additions & 1 deletion app/bedrock-smartllm-backend/manifests/01-shim-source.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -25,14 +25,15 @@ data:

import boto3
from fastapi import FastAPI, HTTPException
from prometheus_client import CONTENT_TYPE_LATEST, Gauge, Histogram, generate_latest
from prometheus_client import CONTENT_TYPE_LATEST, Gauge, Histogram, generate_latest, start_http_server
from pydantic import BaseModel
from starlette.responses import Response

MODEL_ID = os.environ["MODEL_ID"]
MODEL_NAME = os.environ.get("MODEL_NAME", MODEL_ID.replace("/", "-"))
AWS_REGION = os.environ.get("AWS_REGION", "ap-southeast-2")
CHAT_PORT = int(os.environ.get("CHAT_PORT", "8080"))
METRICS_PORT = int(os.environ.get("METRICS_PORT", "9100"))

logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(message)s")
log = logging.getLogger("bedrock-shim")
Expand Down Expand Up @@ -136,5 +137,14 @@ data:

if __name__ == "__main__":
import uvicorn
# Start a dedicated prometheus_client server on METRICS_PORT so the
# ServiceMonitor (which scrapes :metrics named-port → 9100) actually
# finds an open socket. Previously /metrics was only mounted on the
# FastAPI app at CHAT_PORT (8080), so port 9100 was unbound and the
# ServiceMonitor scrape silently failed (`up=0`). Keeping the FastAPI
# /metrics endpoint too — harmless duplicate, lets ad-hoc curl from
# either port still work.
start_http_server(METRICS_PORT)
log.info("metrics server listening on :%d", METRICS_PORT)
log.info("starting bedrock-shim model=%s region=%s", MODEL_NAME, AWS_REGION)
uvicorn.run(app, host="0.0.0.0", port=CHAT_PORT, log_level="info")
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