通过filebeat的modules搜集nginx日志

Posted 2020-12-16 侠客书生

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前提安装好ES和Kibana

nginx日志格式如下

log_format main \'$remote_addr - $remote_user [$time_local] "$request" \'
                    \'$status $body_bytes_sent "$http_referer" \'
                    \'"$http_user_agent" "$http_x_forwarded_for" \'
                    \'"$request_body" "$upstream_addr" "$uri" "$upstream_response_time" "$upstream_http_name" "$upstream_http_host" "$request_time" \';

1.下载并安装filebeat

rpm -ivh filebeat-7.5.1-x86_64.rpm

2.启用nginx modules

filebeat modules enable nginx

3.配置NGINX访问日志路径

/etc/filebeat/modules.d/nginx.yml

- module: nginx
  # Access logs
  access:
    enabled: true

    # Set custom paths for the log files. If left empty,
    # Filebeat will choose the paths depending on your OS.
    var.paths: ["/var/log/nginx/*.access.log"]

4.配置ES地址并修改index名称

/etc/filebeat/filebeat.yml

#==================== Elasticsearch template setting ==========================

setup.template.settings:
  index.number_of_shards: 1
  #index.codec: best_compression
  #_source.enabled: false
setup.ilm.enabled: false
setup.template.name: "filebeat-nginx"
setup.template.pattern: "filebeat-nginx-*"

#-------------------------- Elasticsearch output ------------------------------
output.elasticsearch:
  # Array of hosts to connect to.
  hosts: ["192.168.160.34:9200"]
  index: "filebeat-nginx-%{[agent.version]}-%{+yyyy.MM.dd}"

  # Optional protocol and basic auth credentials.
  #protocol: "https"
  username: "elastic"
  password: "pass"

5.修改日志的默认匹配规则

/usr/share/filebeat/module/nginx/access/ingest/default.json

添加upstream_addr、upstream_url、upstream_response_time、request_time等字段

可以通过Grok Debugger检查匹配规则是否正确：http://grokdebug.herokuapp.com/

"grok": {
    "field": "message",
    "patterns": [
        "\\"?(?:%{IP_LIST:nginx.access.remote_ip_list}|%{DATA:source.address}) - %{DATA:user.name} \\\\[%{HTTPDATE:nginx.access.time}\\\\] \\"%{DATA:nginx.access.info}\\" %{NUMBER:http.response.status_code:long} %{NUMBER:http.response.body.bytes:long} \\"%{DATA:http.request.referrer}\\" \\"%{DATA:user_agent.original}\\" \\"%{URIHOST:nginx.access.upstream_addr}\\" \\"%{DATA:nginx.access.upstream_url}\\" \\"%{NUMBER:nginx.access.upstream_response_time:float}\\" \\"-\\" \\"-\\" \\"%{NUMBER:nginx.access.request_time:float}\\""
    ],
    "pattern_definitions": {
        "IP_LIST": "%{IP}(\\"?,?\\\\s*%{IP})*"
    },
    "ignore_missing": true
}

6.修改fields字段

/etc/filebeat/fields.yml

添加upstream_addr、upstream_url、upstream_response_time、request_time等字段

- name: agent
  type: alias
  path: user_agent.original
  migration: true
- name: upstream_response_time
  type: alias
  path: upstream_response_time
  migration: true
- name: upstream_addr
  type: alias
  path: upstream_addr
  migration: true
- name: upstream_url
  type: alias
  path: upstream_url
  migration: true
- name: request_time
  type: alias
  path: request_time
  migration: true

删除原有的pipeline，防止kibana不显示自定义的字段