- name: Validate Loki Log Errors (Health Gate) env: # Use your direct Loki URL or Grafana Loki proxy endpoint LOKI_URL: "https://grafana.example.com/api/datasources/proxy/uid/loki" GRAFANA_TOKEN: ${{ secrets.GRA

Gemini API
1 
  - name: Validate Loki Log Errors (Health Gate)

    env:

      \# Use your direct Loki URL or Grafana Loki proxy endpoint

      LOKI_URL: "https://grafana.example.com/api/datasources/proxy/uid/loki"

      GRAFANA_TOKEN: ${{ secrets.GRAFANA_SERVICE_ACCOUNT_TOKEN }}

      SERVICE_NAME: "ton-connect"

      DEPLOY_ENV: "production"

      MAX_ALLOWED_ERRORS: "0" # Zero-tolerance threshold for errors in 5m window

    run: |

      echo "Scanning Loki logs for errors in service: ${SERVICE_NAME}..."

      \# LogQL query: Count log lines containing 'error', 'exception', or 'fatal' over the last 5m

      LOGQL_QUERY="sum(count_over_time({service=\\"${SERVICE_NAME}\\", environment=\\"${DEPLOY_ENV}\\"} |\~ \\"(?i)error|exception|fatal\\" \[5m\])) or vector(0)"

      \# Query Loki Instant Query API

      RESPONSE=$(curl -sG "${LOKI_URL}/loki/api/v1/query" \\

        -H "Authorization: Bearer ${GRAFANA_TOKEN}" \\

        --data-urlencode "query=${LOGQL_QUERY}")

      \# Check API response status

      STATUS=$(echo "${RESPONSE}" | jq -r '.status // "error"')

      if \[ "${STATUS}" != "success" \]; then

        echo "::error::Failed to query Loki API. Response: ${RESPONSE}"

        exit 1

      fi

      \# Extract error line count from vector result

      ERROR_COUNT=$(echo "${RESPONSE}" | jq -r '.data.result\[0\].value\[1\] // "0"')

      echo "Found ${ERROR_COUNT} error log entries in the last 5 minutes."

      \# Evaluate threshold

      if \[ "${ERROR_COUNT}" -gt "${MAX_ALLOWED_ERRORS}" \]; then

        echo "::error::Loki log check failed! ${ERROR_COUNT} error log entries found (Threshold: ${MAX_ALLOWED_ERRORS})."

        

        \# Print sample matching error lines for faster debugging

        SAMPLE_LOGS_QUERY="{service=\\"${SERVICE_NAME}\\", environment=\\"${DEPLOY_ENV}\\"} |\~ \\"(?i)error|exception|fatal\\""

        echo "--- Recent Log Error Samples ---"

        curl -sG "${LOKI_URL}/loki/api/v1/query_range" \\

          -H "Authorization: Bearer ${GRAFANA_TOKEN}" \\

          --data-urlencode "query=${SAMPLE_LOGS_QUERY}" \\

          --data-urlencode "limit=5" | jq -r '.data.result\[\].values\[\]\[1\]'

        echo "--------------------------------"

        exit 1

      fi

      ech

o “Loki log verification passed successfully.”