nginx-log-exporter

A Exporter to parse Nginx/gin request log to Prometheus metrics.

Features

Various log formats support.
Request path can be rewrited.
Status code can be mergeable.
Prometheus Exemplar support.

Installation

go get github.com/songjiayang/nginx-log-exporter
Or use binary release

Usage

nginx-log-exporter -h 

Usage of:
  -config.file string
    	Nginx log exporter configuration file name. (default "config.yml")
  -web.listen-address string
    	Address to listen on for the web interface and API. (default ":9999")
  -placeholder.replace bool
         Whether enable placeholder replacement when rewriting the request path  (default false)
exit status 2

Configuration

- name: nginx
  format: $remote_addr - $remote_user [$time_local] "$method $request $protocol" $request_time-$upstream_response_time $status $body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for" $request_id
  source_files:
    - ./test/nginx.log
  external_labels:
    region: zone1
  relabel_config:
    source_labels:
      - request
      - method
      - status
    replacement:
      request:
        trim: "?"
        replace:
          - target: /v1.0/example/\d+
            value: /v1.0/example/:id
      status:
        replace:
          - target: 4.+
            value: 4xx
          - target: 5.+
            value: 5xx
  histogram_buckets: [0.1, 0.3, 0.5, 1, 2]
  exemplar_config:
    match:
      request_time: ">= 0.3"
    labels:
      - request_id
      - remote_addr
- name: gin
  format: $clientip - [$time_local] "$method $request $protocol $status $upstream_response_time "$http_user_agent" $err"
  source_files:
    - ./test/gin.log
  external_labels:
    region: zone1
  relabel_config:
    source_labels:
      - request
      - method
      - status
    replacement:
      request:
        trim: "?"
  histogram_buckets: [0.1, 0.3, 0.5, 1, 2]

- name: gateway_uri
  format: $remote_addr - $remote_user [$time_local] "$method $uri $protocol" $request_time-$upstream_response_time $status $body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for" $request_id

  source_files:
    - ./logs/nginx_gateway.access.log
  relabel_config:
    source_labels:
      - uri
      - method
      - status
    replacement:
      uri:
        trim: "?"
        replace:
          # replace url "/api/path1/path2/123/xxx" to  "/api/path1/path2/:id/xxx"
          # replace url "/api/path7/path8/789/xxx" to  "/api/path7/path8/:id/xxx"
          - target: (^\/api\/[^\/]+\/[^\/]+\/)\d+(.*)
            value: ${1}:id${2}
          # replace url "/api/path1/path2/path3/123/xxx" to  "/api/path1/path2/path3/:id/xxx"
          # replace url "/api/path7/path8/path9/789/xxx" to  "/api/path7/path8/path9/:id/xxx"
          - target: (^\/api\/[^\/]+\/[^\/]+\/[^\/]+\/)\d+(.*)
            value: ${1}:id${2}
          - target: (^\/api\/[^\/]+\/[^\/]+\/[^\/]+\/)\d+(.*)
            value: ${1}:id${2}
          # The remaining uris starting with /api/ remain as is
          - target: ^\/api\/.*
            value: ${0}
          # The uri that does not match the above rules and is not my concern, please replace it with 'notATargetUri'
          - target: (.*)
            value: "notATargetUri"
      status:
        replace:
          - target: 404
            value: 404
          - target: 4.+
            value: 4xx
          - target: 5.+
            value: 5xx
  histogram_buckets: [0.1, 0.3, 0.5, 1, 2]

- name: gateway_service
  format: $remote_addr - $remote_user [$time_local] "$method $service $protocol" $request_time-$upstream_response_time $status $body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for" $request_id

  source_files:
    - ./logs/nginx_gateway.access.log
  relabel_config:
    source_labels:
      - method
      - status
      - service
    replacement:
      service:
        trim: "?"
        replace:
          # extract the second part from the request_uri as the service name.
          # The service of "/api/user/path1/123" is "user", and the service of "/api/order/path1/123" is "order"
          # Then we can generate metrics for the service dimension
          - target: \/api\/([\d\w-]+)
            value: ${1}
          - target: (.*)
          - value: ""
      status:
        replace:
          - target: 404
            value: 404
          - target: 4.+
            value: 4xx
          - target: 5.+
            value: 5xx
  histogram_buckets: [0.1, 0.3, 0.5, 1, 2]

format: your nginx log_format regular expression, notice: you should make a new one for your app, variable your log with format configuration, you almost have some variables like body_bytes_sent, upstream_response_time, request_time.
name: service name, metric will be {name}_http_response_count_total, {name}_http_response_count_total, {name}_http_response_size_bytes, {name}_http_upstream_time_seconds, {name}_http_response_time_seconds
source_files: service nginx log, support multiple files.
external_labels: all metrics will add this labelsets.
relabel_config:
- source_labels: what's labels should be use.
- replacement: source labelvalue format rule, it supports regrex, eg /v1.0/example/123?id=q=xxx will relace to /v1.0/example/:id, you also can use it to merge 400, 429 to 4xx.
histogram_buckets: configure histogram metrics buckets.
exemplar_config: configure exemplars, it used for histogram metrics.

Example

./test/nginx.log output

# HELP nginx_http_response_count_total Amount of processed HTTP requests
# TYPE nginx_http_response_count_total counter
nginx_http_response_count_total{method="GET",region="zone1",request="/v1.0/example",status="200"} 2
nginx_http_response_count_total{method="GET",region="zone1",request="/v1.0/example/:id",status="200"} 1
nginx_http_response_count_total{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx"} 1
nginx_http_response_count_total{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx"} 1
# HELP nginx_http_response_size_bytes Total amount of transferred bytes
# TYPE nginx_http_response_size_bytes counter
nginx_http_response_size_bytes{method="GET",region="zone1",request="/v1.0/example",status="200"} 70
nginx_http_response_size_bytes{method="GET",region="zone1",request="/v1.0/example/:id",status="200"} 21
nginx_http_response_size_bytes{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx"} 21
nginx_http_response_size_bytes{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx"} 21
# HELP nginx_http_response_time_seconds Time needed by NGINX to handle requests
# TYPE nginx_http_response_time_seconds histogram
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example",status="200",le="0.1"} 2
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example",status="200",le="0.3"} 2
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example",status="200",le="0.5"} 2
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example",status="200",le="1"} 2
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example",status="200",le="2"} 2
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example",status="200",le="+Inf"} 2
nginx_http_response_time_seconds_sum{method="GET",region="zone1",request="/v1.0/example",status="200"} 0.005
nginx_http_response_time_seconds_count{method="GET",region="zone1",request="/v1.0/example",status="200"} 2
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="200",le="0.1"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="200",le="0.3"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="200",le="0.5"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="200",le="1"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="200",le="2"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="200",le="+Inf"} 1
nginx_http_response_time_seconds_sum{method="GET",region="zone1",request="/v1.0/example/:id",status="200"} 0.003
nginx_http_response_time_seconds_count{method="GET",region="zone1",request="/v1.0/example/:id",status="200"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx",le="0.1"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx",le="0.3"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx",le="0.5"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx",le="1"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx",le="2"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx",le="+Inf"} 1
nginx_http_response_time_seconds_sum{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx"} 0.003
nginx_http_response_time_seconds_count{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx",le="0.1"} 0
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx",le="0.3"} 0
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx",le="0.5"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx",le="1"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx",le="2"} 1
nginx_http_response_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx",le="+Inf"} 1
nginx_http_response_time_seconds_sum{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx"} 0.5
nginx_http_response_time_seconds_count{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx"} 1
# HELP nginx_http_upstream_time_seconds Time needed by upstream servers to handle requests
# TYPE nginx_http_upstream_time_seconds histogram
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example",status="200",le="0.1"} 2
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example",status="200",le="0.3"} 2
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example",status="200",le="0.5"} 2
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example",status="200",le="1"} 2
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example",status="200",le="2"} 2
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example",status="200",le="+Inf"} 2
nginx_http_upstream_time_seconds_sum{method="GET",region="zone1",request="/v1.0/example",status="200"} 0.005
nginx_http_upstream_time_seconds_count{method="GET",region="zone1",request="/v1.0/example",status="200"} 2
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="200",le="0.1"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="200",le="0.3"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="200",le="0.5"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="200",le="1"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="200",le="2"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="200",le="+Inf"} 1
nginx_http_upstream_time_seconds_sum{method="GET",region="zone1",request="/v1.0/example/:id",status="200"} 0.003
nginx_http_upstream_time_seconds_count{method="GET",region="zone1",request="/v1.0/example/:id",status="200"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx",le="0.1"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx",le="0.3"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx",le="0.5"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx",le="1"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx",le="2"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx",le="+Inf"} 1
nginx_http_upstream_time_seconds_sum{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx"} 0.003
nginx_http_upstream_time_seconds_count{method="GET",region="zone1",request="/v1.0/example/:id",status="4xx"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx",le="0.1"} 0
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx",le="0.3"} 0
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx",le="0.5"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx",le="1"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx",le="2"} 1
nginx_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx",le="+Inf"} 1
nginx_http_upstream_time_seconds_sum{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx"} 0.4
nginx_http_upstream_time_seconds_count{method="GET",region="zone1",request="/v1.0/example/:id",status="5xx"} 1
....

./test/gin.log output

gin_http_response_count_total{method="GET",region="zone1",request="/ping",status="200"} 1
gin_http_response_count_total{method="GET",region="zone1",request="/users",status="200"} 1
# HELP gin_http_upstream_time_seconds Time needed by upstream servers to handle requests
# TYPE gin_http_upstream_time_seconds histogram
gin_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/ping",status="200",le="0.1"} 1
gin_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/ping",status="200",le="0.3"} 1
gin_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/ping",status="200",le="0.5"} 1
gin_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/ping",status="200",le="1"} 1
gin_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/ping",status="200",le="2"} 1
gin_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/ping",status="200",le="+Inf"} 1
gin_http_upstream_time_seconds_sum{method="GET",region="zone1",request="/ping",status="200"} 0.000122767
gin_http_upstream_time_seconds_count{method="GET",region="zone1",request="/ping",status="200"} 1
gin_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/users",status="200",le="0.1"} 0
gin_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/users",status="200",le="0.3"} 1
gin_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/users",status="200",le="0.5"} 1
gin_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/users",status="200",le="1"} 1
gin_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/users",status="200",le="2"} 1
gin_http_upstream_time_seconds_bucket{method="GET",region="zone1",request="/users",status="200",le="+Inf"} 1
gin_http_upstream_time_seconds_sum{method="GET",region="zone1",request="/users",status="200"} 0.2
gin_http_upstream_time_seconds_count{method="GET",region="zone1",request="/users",status="200"} 1

gateway_uri namespace output:

# TYPE gateway_uri_http_response_count_total counter
gateway_uri_http_response_count_total{method="GET",status="200",uri="/api/order/path1/:id"} 2
gateway_uri_http_response_count_total{method="GET",status="200",uri="/api/user/path1/:id"} 2
gateway_uri_http_response_count_total{method="POST",status="200",uri="/api/order/path1/path2/:id"} 1
gateway_uri_http_response_count_total{method="POST",status="200",uri="/api/user/path1/path2/:id"} 2
# HELP gateway_uri_http_response_size_bytes Total amount of transferred bytes
# TYPE gateway_uri_http_response_size_bytes counter
gateway_uri_http_response_size_bytes{method="GET",status="200",uri="/api/order/path1/:id"} 70
gateway_uri_http_response_size_bytes{method="GET",status="200",uri="/api/user/path1/:id"} 70
gateway_uri_http_response_size_bytes{method="POST",status="200",uri="/api/order/path1/path2/:id"} 21
gateway_uri_http_response_size_bytes{method="POST",status="200",uri="/api/user/path1/path2/:id"} 42

gateway_service namespace output:

# TYPE gateway_service_http_response_count_total counter
gateway_service_http_response_count_total{method="GET",service="order",status="200"} 2
gateway_service_http_response_count_total{method="GET",service="user",status="200"} 2
gateway_service_http_response_count_total{method="POST",service="order",status="200"} 1
gateway_service_http_response_count_total{method="POST",service="user",status="200"} 2
# HELP gateway_service_http_response_size_bytes Total amount of transferred bytes
# TYPE gateway_service_http_response_size_bytes counter
gateway_service_http_response_size_bytes{method="GET",service="order",status="200"} 70
gateway_service_http_response_size_bytes{method="GET",service="user",status="200"} 70
gateway_service_http_response_size_bytes{method="POST",service="order",status="200"} 21
gateway_service_http_response_size_bytes{method="POST",service="user",status="200"} 42
# HELP gateway_service_http_response_time_seconds Time needed by NGINX to handle requests

Thanks

Inspired by prometheus-nginxlog-exporter

Name		Name	Last commit message	Last commit date
Latest commit History 33 Commits
collector		collector
config		config
logs		logs
.gitignore		.gitignore
README.md		README.md
build.sh		build.sh
config.yml		config.yml
go.mod		go.mod
go.sum		go.sum
main.go		main.go

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