signoz/pkg/query-service/app/integrations/builtin_integrations/nginx/config/collect-logs.md

Collect Nginx Logs

You can configure Nginx logs collection by providing the required collector config to your collector.

Create collector config file

Save the following config for collecting Nginx logs in a file named nginx-logs-collection-config.yaml

receivers:
  filelog/nginx-access-logs:
    include: ["${env:NGINX_ACCESS_LOG_FILE}"]
    operators:
      # Parse the default nginx access log format. Nginx defaults to the "combined" log format
      # $remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent"
      # For more details, see https://nginx.org/en/docs/http/ngx_http_log_module.html
      - type: regex_parser
        if: body matches '^(?P<remote_addr>[0-9\\.]+) - (?P<remote_user>[^\\s]+) \\[(?P<ts>.+)\\] "(?P<request_method>\\w+?) (?P<request_path>.+?)" (?P<status>[0-9]+) (?P<body_bytes_sent>[0-9]+) "(?P<http_referrer>.+?)" "(?P<http_user_agent>.+?)"$'
        parse_from: body
        parse_to: attributes
        regex: '^(?P<remote_addr>[0-9\.]+) - (?P<remote_user>[^\s]+) \[(?P<ts>.+)\] "(?P<request_method>\w+?) (?P<request_path>.+?)" (?P<status>[0-9]+) (?P<body_bytes_sent>[0-9]+) "(?P<http_referrer>.+?)" "(?P<http_user_agent>.+?)"$'
        timestamp:
          parse_from: attributes.ts
          layout: "02/Jan/2006:15:04:05 -0700"
          layout_type: gotime
        severity:
          parse_from: attributes.status
          overwrite_text: true
          mapping:
            debug: "1xx"
            info:
              - "2xx"
              - "3xx"
            warn: "4xx"
            error: "5xx"
      - type: remove
        if: attributes.ts != nil
        field: attributes.ts
      - type: add
        field: attributes.source
        value: nginx

  filelog/nginx-error-logs:
    include: ["${env:NGINX_ERROR_LOG_FILE}"]
    operators:
      # Parse the default nginx error log format.
      # YYYY/MM/DD HH:MM:SS [LEVEL] PID#TID: *CID MESSAGE
      # For more details, see https://github.com/phusion/nginx/blob/master/src/core/ngx_log.c
      - type: regex_parser
        if: body matches '^(?P<ts>.+?) \\[(?P<log_level>\\w+)\\] (?P<pid>\\d+)#(?P<tid>\\d+). \\*(?P<cid>\\d+) (?P<message>.+)$'
        parse_from: body
        parse_to: attributes
        regex: '^(?P<ts>.+?) \[(?P<log_level>\w+)\] (?P<pid>\d+)#(?P<tid>\d+). \*(?P<cid>\d+) (?P<message>.+)$'
        timestamp:
          parse_from: attributes.ts
          layout: "2006/01/02 15:04:05"
          layout_type: gotime
        severity:
          parse_from: attributes.log_level
          overwrite_text: true
          mapping:
            debug: "debug"
            info:
              - "info"
              - "notice"
            warn: "warn"
            error:
              - "error"
              - "crit"
              - "alert"
            fatal: "emerg"
      - type: remove
        if: attributes.ts != nil
        field: attributes.ts
      - type: move
        if: attributes.message != nil
        from: attributes.message
        to: body
      - type: add
        field: attributes.source
        value: nginx

processors:
  batch:
    send_batch_size: 10000
    send_batch_max_size: 11000
    timeout: 10s

exporters:
  # export to SigNoz cloud
  otlp/nginx-logs:
    endpoint: "${env:OTLP_DESTINATION_ENDPOINT}"
    tls:
      insecure: false
    headers:
      "signoz-access-token": "${env:SIGNOZ_INGESTION_KEY}"

  # export to local collector
  # otlp/nginx-logs:
  #   endpoint: "localhost:4317"
  #   tls:
  #     insecure: true

service:
  pipelines:
    logs/nginx:
      receivers: [filelog/nginx-access-logs, filelog/nginx-error-logs]
      processors: [batch]
      exporters: [otlp/nginx-logs]

If using non-default nginx log format, adjust log parsing regex

If you are using a custom nginx log format, please adjust the regex used for parsing logs in the receivers named filelog/nginx-access-logs and filelog/nginx-error-logs in collector config.

Set Environment Variables

Set the following environment variables in your otel-collector environment:

# path of Nginx access log file. must be accessible by the otel collector
# typically found at /usr/local/var/log/nginx/access.log on macOS
export NGINX_ACCESS_LOG_FILE=/var/log/nginx/access.log

# path of Nginx error log file. must be accessible by the otel collector
# typically found at /usr/local/var/log/nginx/error.log on macOS
export NGINX_ERROR_LOG_FILE=/var/log/nginx/error.log

# region specific SigNoz cloud ingestion endpoint
export OTLP_DESTINATION_ENDPOINT="ingest.us.signoz.cloud:443"

# your SigNoz ingestion key
export SIGNOZ_INGESTION_KEY="signoz-ingestion-key"

Use collector config file

Make the collector config file available to your otel collector and use it by adding the following flag to the command for running your collector

--config nginx-logs-collection-config.yaml

Note: the collector can use multiple config files, specified by multiple occurrences of the --config flag.