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102 lines
3.3 KiB
Markdown
102 lines
3.3 KiB
Markdown
[中文](prometheus-cn.md)
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# prometheus
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This plugin exposes metrics in Prometheus Exposition format.
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## Attributes
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none.
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## How to enable it
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`prometheus` plugin can be enable with empty table, because it doesn't have
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any options yet.
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For example:
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```shell
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curl http://127.0.0.1:9080/apisix/admin/routes/1 -X PUT -d '
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{
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"uri": "/hello",
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"plugins": {
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"prometheus":{}
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},
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"upstream": {
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"type": "roundrobin",
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"nodes": {
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"127.0.0.1:80": 1
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}
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}
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}'
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```
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## How to fetch the metric data
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We fetch the metric data from the specified url `/apisix/prometheus/metrics`.
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Puts this uri address into prometheus, and it will automatically fetch
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these metric data.
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For example like this:
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```yaml
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scrape_configs:
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- job_name: 'apisix'
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metrics_path: '/apisix/prometheus/metrics'
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static_configs:
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- targets: ['127.0.0.1:9080']
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```
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And we can check the status at prometheus console:
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### Grafana dashboard
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Metrics exported by the plugin can be graphed in Grafana using a drop in dashboard: https://grafana.com/dashboards/7424 .
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### Available metrics
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* `Status codes`: HTTP status codes returned by upstream services. These are available per service and across all services.
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* `Bandwidth`: Total Bandwidth (egress/ingress) flowing through apisix. This metric is available per service and as a sum across all services.
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* `etcd reachability`: A gauge type with a value of 0 or 1, representing if etcd can be reached by a apisix or not.
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* `Connections`: Various Nginx connection metrics like active, reading, writing, and number of accepted connections.
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Here is the original metric data of apisix:
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```
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$ curl http://127.0.0.2:9080/apisix/prometheus/metrics
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# HELP apisix_bandwidth Total bandwidth in bytes consumed per service in Apisix
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# TYPE apisix_bandwidth counter
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apisix_bandwidth{type="egress",service="127.0.0.2"} 183
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apisix_bandwidth{type="egress",service="bar.com"} 183
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apisix_bandwidth{type="egress",service="foo.com"} 2379
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apisix_bandwidth{type="ingress",service="127.0.0.2"} 83
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apisix_bandwidth{type="ingress",service="bar.com"} 76
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apisix_bandwidth{type="ingress",service="foo.com"} 988
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# HELP apisix_etcd_reachable Config server etcd reachable from Apisix, 0 is unreachable
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# TYPE apisix_etcd_reachable gauge
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apisix_etcd_reachable 1
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# HELP apisix_http_status HTTP status codes per service in Apisix
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# TYPE apisix_http_status counter
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apisix_http_status{code="200",service="127.0.0.2"} 1
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apisix_http_status{code="200",service="bar.com"} 1
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apisix_http_status{code="200",service="foo.com"} 13
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# HELP apisix_nginx_http_current_connections Number of HTTP connections
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# TYPE apisix_nginx_http_current_connections gauge
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apisix_nginx_http_current_connections{state="accepted"} 11994
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apisix_nginx_http_current_connections{state="active"} 2
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apisix_nginx_http_current_connections{state="handled"} 11994
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apisix_nginx_http_current_connections{state="reading"} 0
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apisix_nginx_http_current_connections{state="total"} 1191780
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apisix_nginx_http_current_connections{state="waiting"} 1
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apisix_nginx_http_current_connections{state="writing"} 1
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# HELP apisix_nginx_metric_errors_total Number of nginx-lua-prometheus errors
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# TYPE apisix_nginx_metric_errors_total counter
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apisix_nginx_metric_errors_total 0
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```
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