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Version: 2.8

prometheus

This plugin exposes metrics in Prometheus Exposition format.

Attributes#

NameTypeRequirementDefaultValidDescription
prefer_namebooleanoptionalfalseWhen set to true, would print route/service name instead of id in Prometheus metric.

API#

This plugin will add /apisix/prometheus/metrics to expose the metrics.

The metrics are exposed via a separate Prometheus server address. By default, the address is 127.0.0.1:9091. You can change it in the conf/config.yaml, for example:

plugin_attr:  prometheus:    export_addr:      ip: ${{INTRANET_IP}}      port: 9092

Assume environment variable INTRANET_IP is 172.1.1.1, now APISIX will export the metrics via 172.1.1.1:9092.

Before version 2.6, the metrics are exposed via the data panel port, you may need to use interceptors to protect it.

If you still want this behavior, you can configure it like this:

plugin_attr:  prometheus:    enable_export_server: false

How to enable it#

prometheus plugin could be enable with empty table. Notice, name could be duplicated for multiple routes/services, so when set prefer_name to true, take care of naming format or it could be misleading.

For example:

curl http://127.0.0.1:9080/apisix/admin/routes/1  -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '{    "uri": "/hello",    "plugins": {        "prometheus":{}    },    "upstream": {        "type": "roundrobin",        "nodes": {            "127.0.0.1:80": 1        }    }}'

You can use APISIX Dashboard to complete the above operations through the web console.

First, add a Route:

Then add prometheus plugin:

How to fetch the metric data#

We fetch the metric data from the specified url /apisix/prometheus/metrics.

curl -i http://127.0.0.1:9091/apisix/prometheus/metrics

Puts this URL address into prometheus, and it will automatically fetch these metric data.

For example like this:

scrape_configs:  - job_name: 'apisix'    metrics_path: '/apisix/prometheus/metrics'    static_configs:    - targets: ['127.0.0.1:9091']

And we can check the status at prometheus console:

How to specify export uri#

We can change the default export uri in the plugin_attr section of conf/config.yaml.

NameTypeDefaultDescription
export_uristring"/apisix/prometheus/metrics"uri to get the prometheus metrics

Here is an example:

plugin_attr:  prometheus:    export_uri: /apisix/metrics

Grafana dashboard#

Metrics exported by the plugin can be graphed in Grafana using a drop in dashboard.

Downloads Grafana dashboard meta and imports it to Grafana。

Or you can goto Grafana official for Grafana meta data.

Available metrics#

  • Status codes: HTTP status code returned from upstream services. These status code available per service and across all services.

    Attributes:

    NameDescription
    codeThe HTTP status code returned by the upstream service.
    routeThe route_id of the matched route is request. If it does not match, the default value is an empty string.
    matched_uriThe uri of the route matching the request, if it does not match, the default value is an empty string.
    matched_hostThe host of the route that matches the request. If it does not match, the default value is an empty string.
    serviceThe service_id of the route matched by the request. When the route lacks service_id, the default is $host.
    consumerThe consumer_name of the consumer that matches the request. If it does not match, the default value is an empty string.
    nodeThe ip of the upstream node.
  • Bandwidth: Total Bandwidth (egress/ingress) flowing through APISIX. The total bandwidth of per service can be counted.

    Attributes:

    NameDescription
    typeThe type of bandwidth(egress/ingress).
    routeThe route_id of the matched route is request. If it does not match, the default value is an empty string..
    serviceThe service_id of the route matched by the request. When the route lacks service_id, the default is $host.
    consumerThe consumer_name of the consumer that matches the request. If it does not match, the default value is an empty string.
    nodeThe ip of the upstream node.
  • etcd reachability: A gauge type with a value of 0 or 1, representing if etcd can be reached by a APISIX or not, where 1 is available, and 0 is unavailable.

  • Connections: Various Nginx connection metrics like active, reading, writing, and number of accepted connections.

  • Batch process entries: A gauge type, when we use plugins and the plugin used batch process to send data, such as: sys logger, http logger, sls logger, tcp logger, udp logger and zipkin, then the entries which hasn't been sent in batch process will be counted in the metrics.

  • Latency: The per service histogram of request time in different dimensions.

    Attributes:

    NameDescription
    typeThe value can be apisix, upstream or request, which means http latency caused by apisix, upstream, or their sum.
    serviceThe service_id of the route matched by the request. When the route lacks service_id, the default is $host.
    consumerThe consumer_name of the consumer that matches the request. If it does not match, the default value is an empty string.
    nodeThe ip of the upstream node.
  • Info: the information of APISIX node.

Here is the original metric data of APISIX:

$ curl http://127.0.0.1:9091/apisix/prometheus/metrics# HELP apisix_bandwidth Total bandwidth in bytes consumed per service in Apisix# TYPE apisix_bandwidth counterapisix_bandwidth{type="egress",route="",service="",consumer="",node=""} 8417apisix_bandwidth{type="egress",route="1",service="",consumer="",node="127.0.0.1"} 1420apisix_bandwidth{type="egress",route="2",service="",consumer="",node="127.0.0.1"} 1420apisix_bandwidth{type="ingress",route="",service="",consumer="",node=""} 189apisix_bandwidth{type="ingress",route="1",service="",consumer="",node="127.0.0.1"} 332apisix_bandwidth{type="ingress",route="2",service="",consumer="",node="127.0.0.1"} 332# HELP apisix_etcd_modify_indexes Etcd modify index for APISIX keys# TYPE apisix_etcd_modify_indexes gaugeapisix_etcd_modify_indexes{key="consumers"} 0apisix_etcd_modify_indexes{key="global_rules"} 0apisix_etcd_modify_indexes{key="max_modify_index"} 222apisix_etcd_modify_indexes{key="prev_index"} 35apisix_etcd_modify_indexes{key="protos"} 0apisix_etcd_modify_indexes{key="routes"} 222apisix_etcd_modify_indexes{key="services"} 0apisix_etcd_modify_indexes{key="ssls"} 0apisix_etcd_modify_indexes{key="stream_routes"} 0apisix_etcd_modify_indexes{key="upstreams"} 0apisix_etcd_modify_indexes{key="x_etcd_index"} 223# HELP apisix_batch_process_entries batch process remaining entries# TYPE apisix_batch_process_entries gaugeapisix_batch_process_entries{name="http-logger",route_id="9",server_addr="127.0.0.1"} 1apisix_batch_process_entries{name="sls-logger",route_id="9",server_addr="127.0.0.1"} 1apisix_batch_process_entries{name="tcp-logger",route_id="9",server_addr="127.0.0.1"} 1apisix_batch_process_entries{name="udp-logger",route_id="9",server_addr="127.0.0.1"} 1apisix_batch_process_entries{name="sys-logger",route_id="9",server_addr="127.0.0.1"} 1apisix_batch_process_entries{name="zipkin_report",route_id="9",server_addr="127.0.0.1"} 1# HELP apisix_etcd_reachable Config server etcd reachable from Apisix, 0 is unreachable# TYPE apisix_etcd_reachable gaugeapisix_etcd_reachable 1# HELP apisix_http_status HTTP status codes per service in Apisix# TYPE apisix_http_status counterapisix_http_status{code="200",route="1",matched_uri="/hello",matched_host="",service="",consumer="",node="127.0.0.1"} 4apisix_http_status{code="200",route="2",matched_uri="/world",matched_host="",service="",consumer="",node="127.0.0.1"} 4apisix_http_status{code="404",route="",matched_uri="",matched_host="",service="",consumer="",node=""} 1# HELP apisix_nginx_http_current_connections Number of HTTP connections# TYPE apisix_nginx_http_current_connections gaugeapisix_nginx_http_current_connections{state="accepted"} 11994apisix_nginx_http_current_connections{state="active"} 2apisix_nginx_http_current_connections{state="handled"} 11994apisix_nginx_http_current_connections{state="reading"} 0apisix_nginx_http_current_connections{state="total"} 1191780apisix_nginx_http_current_connections{state="waiting"} 1apisix_nginx_http_current_connections{state="writing"} 1# HELP apisix_nginx_metric_errors_total Number of nginx-lua-prometheus errors# TYPE apisix_nginx_metric_errors_total counterapisix_nginx_metric_errors_total 0# HELP apisix_http_latency HTTP request latency in milliseconds per service in APISIX# TYPE apisix_http_latency histogramapisix_http_latency_bucket{type="apisix",route="1",service="",consumer="",node="127.0.0.1",le="1"} 1apisix_http_latency_bucket{type="apisix",route="1",service="",consumer="",node="127.0.0.1",le="2"} 1apisix_http_latency_bucket{type="request",route="1",service="",consumer="",node="127.0.0.1",le="1"} 1apisix_http_latency_bucket{type="request",route="1",service="",consumer="",node="127.0.0.1",le="2"} 1apisix_http_latency_bucket{type="upstream",route="1",service="",consumer="",node="127.0.0.1",le="1"} 1apisix_http_latency_bucket{type="upstream",route="1",service="",consumer="",node="127.0.0.1",le="2"} 1...# HELP apisix_node_info Info of APISIX node# TYPE apisix_node_info gaugeapisix_node_info{hostname="desktop-2022q8f-wsl"} 1

Disable Plugin#

Remove the corresponding json configuration in the plugin configuration to disable prometheus. APISIX plugins are hot-reloaded, therefore no need to restart APISIX.

curl http://127.0.0.1:9080/apisix/admin/routes/1  -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '{    "uri": "/hello",    "plugins": {},    "upstream": {        "type": "roundrobin",        "nodes": {            "127.0.0.1:80": 1        }    }}'