[SERVICE]
    HTTP_Server     On
    HTTP_Listen     0.0.0.0
    HTTP_PORT       2020
    Parsers_File    /fluent-bit/configs/plugin-metrics-parser.conf
    storage.metrics On
    Grace           30
    Flush           1

# Configure FB to scrape its own prom metrics
[INPUT]
    Name exec
    Command curl -s http://127.0.0.1:2020/api/v1/metrics/prometheus
    Interval_Sec 30
    Tag fb_metrics

# Filter out the HELP and TYPE fields which aren't parseable by the cw metric filter
[FILTER]
    Name grep
    Match fb_metrics
    Exclude exec HELP

[FILTER]
    Name grep
    Match fb_metrics
    Exclude exec TYPE

# Parse the metrics to json for easy parsing in CW Log Group Metrics filter
[FILTER]
    Name parser
    Match fb_metrics
    Key_Name exec
    Parser fluentbit_prom_metrics_to_json
    Reserve_Data True

# Add hostname to metrics to identify them
[FILTER]
    Name record_modifier
    Match *
    Record hostname ${HOSTNAME}

# Send the metrics as CW Logs
# The CW Metrics filter on the log group will turn them into metrics
# Instructions to create the metric filter: https://github.com/aws-samples/amazon-ecs-firelens-examples/tree/mainline/examples/fluent-bit/send-fb-internal-metrics-to-cw
# Use hostname in logs to differentiate log streams per task in Fargate
# Alternative is to use: https://github.com/aws/amazon-cloudwatch-logs-for-fluent-bit#templating-log-group-and-stream-names
[OUTPUT]
    Name cloudwatch_logs
    Match   fb_metrics*
    region ${FLUENT_BIT_METRICS_LOG_REGION}
    log_group_name ${FLUENT_BIT_METRICS_LOG_GROUP}
    log_stream_name ${HOSTNAME}-fb-internal-metrics
    auto_create_group On
    retry_limit 2
    workers 1