前言
刚从事开发那段时间不习惯输出日志，认为那是无用功，徒增代码量，总认为自己的代码无懈可击；老大的叮嘱、强调也都视为耳旁风，最终导致的结果是我加班排查问题，花的时间还挺长的，要复现问题、排查问题等，幸亏那是公司内部员工用的系统，时间长一点也没什么大问题，但是如果是针对客户的，时间就代表很多东西了，那造成的影响就非常大了。自那以后养成了输出日志的习惯。
但是后来发现，仅仅只是输出日志文件，对于排查问题来说，还是很费时，因为要在一个庞大的日志文件中过滤出我们需要的信息也十分耗时；那么此时基于日志文件的日志系统就被需要了。
至于需不需要搭建日志系统、以及搭建一个怎样的日志系统，需要根据我们的业务实际情况而定，例如公司内部员工用的一个不重要的系统，那么日志文件可能就够了；而对于针对客户的、直接与公司利益挂钩的，我认为不仅要搭建日志系统，更要输出更详细的日志信息到日志文件，提供运维的效率。
elk filebeat 各个组件的功能
Elasticsearch：分布式搜索和分析引擎，具有高可伸缩、高可靠和易管理等特点。基于 Apache Lucene 构建，能对大容量的数据进行接近实时的存储、搜索和分析操作。通常被用作某些应用的基础搜索引擎，使其具有复杂的搜索功能；
Logstash：数据收集引擎。它支持动态的从各种数据源搜集数据，并对数据进行过滤、分析、丰富、统一格式等操作，然后存储到用户指定的位置；
Kibana：数据分析和可视化平台。通常与 Elasticsearch 配合使用，对其中数据进行搜索、分析和以统计图表的方式展示；
Filebeat：一个轻量级开源日志文件数据搜集器，基于 Logstash-Forwarder 源代码开发，是对它的替代。在需要采集日志数据的 server 上安装 Filebeat，并指定日志目录或日志文件后，Filebeat 就能读取数据，迅速发送到 Logstash 进行解析，亦或直接发送到 Elasticsearch 进行集中式存储和分析；
本文不会对各个组件做详细的介绍与使用说明，如果想对各个组件有更详细的了解，那么需要大伙自行去学习，官网的资料就很不错。
环境准备
192.168.1.110：logstash java
192.168.1.111：filebeat redis mysql jdk tomcat8
192.168.1.112：kibana
192.168.1.113：elasticsearch java
日志系统搭建
相关安装包大家自行准备，去官网下载即可；elk filebeat我用的都是6.3.2版本，jdk用的1.8版本，mysql是5.7，tomcat是8.5.30
Elasticsearch
依赖jdk，jdk的 搭建可参考我的 另一篇博客：virtualBox安装centos，并搭建tomcat
root@cent0s7-03 opt# tar -zxvf elasticsearch-6.3.2.tar.gz
root@cent0s7-03 opt# cd elasticsearch-6.3.2
修改配置，支持远程访问：
修改elasticsearch的home目录/config/elasticsearch.yml，打开配置项network.host:，并将其值设置成0.0.0.0；
但是需要增加系统配置来支持：
root@cent0s7-03 bin# vi /etc/security/limits.conf
新增如下配置
代码语言：javascript复制* soft nofile 65536
* hard nofile 131072
* soft nproc 2048
* hard nproc 4096root@cent0s7-03 bin# vi /etc/sysctl.conf
新增如下配置
代码语言：javascript复制vm.max_map_count=262144root@cent0s7-03 bin# sysctl -p
启动elasticsearch
root@cent0s7-03 bin# ./elasticsearch
发现报错，如下
代码语言：javascript复制[2018-08-19T10:26:33,685][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:140) ~[elasticsearch-6.3.2.jar:6.3.2]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:127) ~[elasticsearch-6.3.2.jar:6.3.2]
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.3.2.jar:6.3.2]
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.3.2.jar:6.3.2]
at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.3.2.jar:6.3.2]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~[elasticsearch-6.3.2.jar:6.3.2]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:86) ~[elasticsearch-6.3.2.jar:6.3.2]
Caused by: java.lang.RuntimeException: can not run elasticsearch as root
at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:104) ~[elasticsearch-6.3.2.jar:6.3.2]
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:171) ~[elasticsearch-6.3.2.jar:6.3.2]
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:326) ~[elasticsearch-6.3.2.jar:6.3.2]
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-6.3.2.jar:6.3.2]
... 6 more这是出于系统安全考虑设置的条件。由于ElasticSearch可以接收用户输入的脚本并且执行，为了系统安全考虑，建议创建一个单独的用户用来运行ElasticSearch。
root@cent0s7-03 bin# groupadd elk
root@cent0s7-03 bin# useradd elsearch -g elk
root@cent0s7-03 bin# cd /opt
root@cent0s7-03 opt# chown -R elsearch:elk elasticsearch-6.3.2
root@cent0s7-03 opt# su elsearch
elsearch@cent0s7-03 opt$ cd elasticsearch-6.3.2/bin
elsearch@cent0s7-03 bin$ ./elasticsearch (加-d，则表示后端运行)
访问：http://192.168.1.113:9200，出现如下信息
代码语言：javascript复制{
"name" : "8dBt-dz",
"cluster_name" : "elasticsearch",
"cluster_uuid" : "gGH8gMvjTm62yyjob3aeZA",
"version" : {
"number" : "6.3.2",
"build_flavor" : "default",
"build_type" : "tar",
"build_hash" : "053779d",
"build_date" : "2018-07-20T05:20:23.451332Z",
"build_snapshot" : false,
"lucene_version" : "7.3.1",
"minimum_wire_compatibility_version" : "5.6.0",
"minimum_index_compatibility_version" : "5.0.0"
},
"tagline" : "You Know, for Search"
}表示单节点的elasticsearch搭建起来了
Kibana
root@centos7-02 opt# tar -zxvf kibana-6.3.2-linux-x86_64.tar.gz
root@centos7-02 opt# mv kibana-6.3.2-linux-x86_64 kibana6.3.2
修改配置文件：kibana.yml
root@centos7-02 opt# vi kibana6.3.2/config/kibana.yml
主要改改两项：
代码语言：javascript复制server.host: "0.0.0.0"
elasticsearch.url: "http://192.168.1.113:9200"支援远程访问和从elasticsearch获取数据
root@centos7-02 opt# ./kibana6.3.2/bin/kibana
启动日志如下
代码语言：javascript复制 log [11:09:00.993] [info][status][plugin:kibana@6.3.2] Status changed from uninitialized to green - Ready
log [11:09:01.032] [info][status][plugin:elasticsearch@6.3.2] Status changed from uninitialized to yellow - Waiting for Elasticsearch
log [11:09:01.034] [info][status][plugin:xpack_main@6.3.2] Status changed from uninitialized to yellow - Waiting for Elasticsearch
log [11:09:01.042] [info][status][plugin:searchprofiler@6.3.2] Status changed from uninitialized to yellow - Waiting for Elasticsearch
log [11:09:01.045] [info][status][plugin:ml@6.3.2] Status changed from uninitialized to yellow - Waiting for Elasticsearch
log [11:09:01.106] [info][status][plugin:tilemap@6.3.2] Status changed from uninitialized to yellow - Waiting for Elasticsearch
log [11:09:01.107] [info][status][plugin:watcher@6.3.2] Status changed from uninitialized to yellow - Waiting for Elasticsearch
log [11:09:01.123] [info][status][plugin:license_management@6.3.2] Status changed from uninitialized to green - Ready
log [11:09:01.125] [info][status][plugin:index_management@6.3.2] Status changed from uninitialized to yellow - Waiting for Elasticsearch
log [11:09:01.243] [info][status][plugin:timelion@6.3.2] Status changed from uninitialized to green - Ready
log [11:09:01.245] [info][status][plugin:graph@6.3.2] Status changed from uninitialized to yellow - Waiting for Elasticsearch
log [11:09:01.248] [info][status][plugin:monitoring@6.3.2] Status changed from uninitialized to green - Ready
log [11:09:01.250] [info][status][plugin:security@6.3.2] Status changed from uninitialized to yellow - Waiting for Elasticsearch
log [11:09:01.251] [warning][security] Generating a random key for xpack.security.encryptionKey. To prevent sessions from being invalidated on restart, please set xpack.security.encryptionKey in kibana.yml
log [11:09:01.255] [warning][security] Session cookies will be transmitted over insecure connections. This is not recommended.
log [11:09:01.280] [info][status][plugin:grokdebugger@6.3.2] Status changed from uninitialized to yellow - Waiting for Elasticsearch
log [11:09:01.300] [info][status][plugin:dashboard_mode@6.3.2] Status changed from uninitialized to green - Ready
log [11:09:01.304] [info][status][plugin:logstash@6.3.2] Status changed from uninitialized to yellow - Waiting for Elasticsearch
log [11:09:01.326] [info][status][plugin:apm@6.3.2] Status changed from uninitialized to green - Ready
log [11:09:01.330] [info][status][plugin:console@6.3.2] Status changed from uninitialized to green - Ready
log [11:09:01.332] [info][status][plugin:console_extensions@6.3.2] Status changed from uninitialized to green - Ready
log [11:09:01.334] [info][status][plugin:metrics@6.3.2] Status changed from uninitialized to green - Ready
log [11:09:01.644] [warning][reporting] Generating a random key for xpack.reporting.encryptionKey. To prevent pending reports from failing on restart, please set xpack.reporting.encryptionKey in kibana.yml
log [11:09:01.651] [info][status][plugin:reporting@6.3.2] Status changed from uninitialized to yellow - Waiting for Elasticsearch
log [11:09:01.697] [info][listening] Server running at http://0.0.0.0:5601
log [11:09:01.819] [info][status][plugin:elasticsearch@6.3.2] Status changed from yellow to green - Ready
log [11:09:01.852] [info][license][xpack] Imported license information from Elasticsearch for the [data] cluster: mode: basic | status: active
log [11:09:01.893] [info][status][plugin:xpack_main@6.3.2] Status changed from yellow to green - Ready
log [11:09:01.893] [info][status][plugin:searchprofiler@6.3.2] Status changed from yellow to green - Ready
log [11:09:01.894] [info][status][plugin:ml@6.3.2] Status changed from yellow to green - Ready
log [11:09:01.894] [info][status][plugin:tilemap@6.3.2] Status changed from yellow to green - Ready
log [11:09:01.895] [info][status][plugin:watcher@6.3.2] Status changed from yellow to green - Ready
log [11:09:01.895] [info][status][plugin:index_management@6.3.2] Status changed from yellow to green - Ready
log [11:09:01.895] [info][status][plugin:graph@6.3.2] Status changed from yellow to green - Ready
log [11:09:01.896] [info][status][plugin:security@6.3.2] Status changed from yellow to green - Ready
log [11:09:01.897] [info][status][plugin:grokdebugger@6.3.2] Status changed from yellow to green - Ready
log [11:09:01.897] [info][status][plugin:logstash@6.3.2] Status changed from yellow to green - Ready
log [11:09:01.898] [info][status][plugin:reporting@6.3.2] Status changed from yellow to green - Ready
log [11:09:01.916] [info][kibana-monitoring][monitoring-ui] Starting all Kibana monitoring collectors
log [11:09:01.926] [info][license][xpack] Imported license information from Elasticsearch for the [monitoring] cluster: mode: basic | status: active几个警告不影响功能，不出现error就可以正常服务。
访问：http://192.168.1.112:5601，出现下图
Logstash
依赖jdk，jdk的 搭建可参考我的 另一篇博客：virtualBox安装centos，并搭建tomcat
root@centos7-01 opt# tar -zxvf logstash-6.3.2.tar.gz
新增配置文件：first-pipeline.conf
root@centos7-01 opt# vi logstash-6.3.2/config/first-pipeline.conf
代码语言：javascript复制input {
stdin {}
beats {
port => 5044
}
}
output {
elasticsearch {
hosts => ["192.168.1.113:9200"]
}
stdout {
codec => rubydebug
}
}监听5044端口，filebeat会从此端口向logstash写入数据；logstash处理数据之后（filter，实例中没有展示）再输出到elasticsearch
root@centos7-01 opt# ./logstash-6.3.2/bin/logstash -f /opt/logstash-6.3.2/config/first-pipeline.conf
启动日志如下
代码语言：javascript复制Sending Logstash's logs to /opt/logstash-6.3.2/logs which is now configured via log4j2.properties
[2018-09-03T20:59:05,050][WARN ][logstash.config.source.multilocal] Ignoring the 'pipelines.yml' file because modules or command line options are specified
[2018-09-03T20:59:06,072][INFO ][logstash.runner ] Starting Logstash {"logstash.version"=>"6.3.2"}
[2018-09-03T20:59:11,487][INFO ][logstash.pipeline ] Starting pipeline {:pipeline_id=>"main", "pipeline.workers"=>1, "pipeline.batch.size"=>125, "pipeline.batch.delay"=>50}
[2018-09-03T20:59:12,222][INFO ][logstash.outputs.elasticsearch] Elasticsearch pool URLs updated {:changes=>{:removed=>[], :added=>[http://192.168.1.113:9200/]}}
[2018-09-03T20:59:12,230][INFO ][logstash.outputs.elasticsearch] Running health check to see if an Elasticsearch connection is working {:healthcheck_url=>http://192.168.1.113:9200/, :path=>"/"}
[2018-09-03T20:59:12,574][WARN ][logstash.outputs.elasticsearch] Restored connection to ES instance {:url=>"http://192.168.1.113:9200/"}
[2018-09-03T20:59:12,669][INFO ][logstash.outputs.elasticsearch] ES Output version determined {:es_version=>6}
[2018-09-03T20:59:12,672][WARN ][logstash.outputs.elasticsearch] Detected a 6.x and above cluster: the `type` event field won't be used to determine the document _type {:es_version=>6}
[2018-09-03T20:59:12,775][INFO ][logstash.outputs.elasticsearch] New Elasticsearch output {:class=>"LogStash::Outputs::ElasticSearch", :hosts=>["//192.168.1.113:9200"]}
[2018-09-03T20:59:12,810][INFO ][logstash.outputs.elasticsearch] Using mapping template from {:path=>nil}
[2018-09-03T20:59:12,862][INFO ][logstash.outputs.elasticsearch] Attempting to install template {:manage_template=>{"template"=>"logstash-*", "version"=>60001, "settings"=>{"index.refresh_interval"=>"5s"}, "mappings"=>{"_default_"=>{"dynamic_templates"=>[{"message_field"=>{"path_match"=>"message", "match_mapping_type"=>"string", "mapping"=>{"type"=>"text", "norms"=>false}}}, {"string_fields"=>{"match"=>"*", "match_mapping_type"=>"string", "mapping"=>{"type"=>"text", "norms"=>false, "fields"=>{"keyword"=>{"type"=>"keyword", "ignore_above"=>256}}}}}], "properties"=>{"@timestamp"=>{"type"=>"date"}, "@version"=>{"type"=>"keyword"}, "geoip"=>{"dynamic"=>true, "properties"=>{"ip"=>{"type"=>"ip"}, "location"=>{"type"=>"geo_point"}, "latitude"=>{"type"=>"half_float"}, "longitude"=>{"type"=>"half_float"}}}}}}}}
[2018-09-03T20:59:13,758][INFO ][logstash.inputs.beats ] Beats inputs: Starting input listener {:address=>"0.0.0.0:5044"}
The stdin plugin is now waiting for input:
[2018-09-03T20:59:13,852][INFO ][logstash.pipeline ] Pipeline started successfully {:pipeline_id=>"main", :thread=>"#<Thread:0x2ff95604 run>"}
[2018-09-03T20:59:13,958][INFO ][logstash.agent ] Pipelines running {:count=>1, :running_pipelines=>[:main], :non_running_pipelines=>[]}
[2018-09-03T20:59:14,066][INFO ][org.logstash.beats.Server] Starting server on port: 5044
[2018-09-03T20:59:14,562][INFO ][logstash.agent ] Successfully started Logstash API endpoint {:port=>9600}Filebeat
root@centos7 opt# tar -zxvf filebeat-6.3.2-linux-x86_64.tar.gz
root@centos7 opt# mv filebeat-6.3.2-linux-x86_64 filebeat6.3.2
配置filebeat .yml
root@centos7 opt# vi filebeat6.3.2/filebeat.yml
配置之后，内容如下
代码语言：javascript复制###################### Filebeat Configuration Example #########################
# This file is an example configuration file highlighting only the most common
# options. The filebeat.reference.yml file from the same directory contains all the
# supported options with more comments. You can use it as a reference.
#
# You can find the full configuration reference here:
# https://www.elastic.co/guide/en/beats/filebeat/index.html
# For more available modules and options, please see the filebeat.reference.yml sample
# configuration file.
#=========================== Filebeat inputs =============================
filebeat.inputs:
# Each - is an input. Most options can be set at the input level, so
# you can use different inputs for various configurations.
# Below are the input specific configurations.
- type: log
# Change to true to enable this input configuration.
enabled: true
# Paths that should be crawled and fetched. Glob based paths.
paths:
- /log/*.log
#- c:programdataelasticsearchlogs*
# Exclude lines. A list of regular expressions to match. It drops the lines that are
# matching any regular expression from the list.
#exclude_lines: ['^DBG']
# Include lines. A list of regular expressions to match. It exports the lines that are
# matching any regular expression from the list.
#include_lines: ['^ERR', '^WARN']
# Exclude files. A list of regular expressions to match. Filebeat drops the files that
# are matching any regular expression from the list. By default, no files are dropped.
#exclude_files: ['.gz$']
# Optional additional fields. These fields can be freely picked
# to add additional information to the crawled log files for filtering
#fields:
# level: debug
# review: 1
### Multiline options
# Mutiline can be used for log messages spanning multiple lines. This is common
# for Java Stack Traces or C-Line Continuation
# The regexp Pattern that has to be matched. The example pattern matches all lines starting with [
#multiline.pattern: ^[
# Defines if the pattern set under pattern should be negated or not. Default is false.
#multiline.negate: false
# Match can be set to "after" or "before". It is used to define if lines should be append to a pattern
# that was (not) matched before or after or as long as a pattern is not matched based on negate.
# Note: After is the equivalent to previous and before is the equivalent to to next in Logstash
#multiline.match: after
#============================= Filebeat modules ===============================
filebeat.config.modules:
# Glob pattern for configuration loading
path: ${path.config}/modules.d/*.yml
# Set to true to enable config reloading
reload.enabled: false
# Period on which files under path should be checked for changes
#reload.period: 10s
#==================== Elasticsearch template setting ==========================
# setup.template.settings:
# index.number_of_shards: 3
#index.codec: best_compression
#_source.enabled: false
#================================ General =====================================
# The name of the shipper that publishes the network data. It can be used to group
# all the transactions sent by a single shipper in the web interface.
#name:
# The tags of the shipper are included in their own field with each
# transaction published.
#tags: ["service-X", "web-tier"]
# Optional fields that you can specify to add additional information to the
# output.
#fields:
# env: staging
#============================== Dashboards =====================================
# These settings control loading the sample dashboards to the Kibana index. Loading
# the dashboards is disabled by default and can be enabled either by setting the
# options here, or by using the `-setup` CLI flag or the `setup` command.
#setup.dashboards.enabled: false
# The URL from where to download the dashboards archive. By default this URL
# has a value which is computed based on the Beat name and version. For released
# versions, this URL points to the dashboard archive on the artifacts.elastic.co
# website.
#setup.dashboards.url:
#============================== Kibana =====================================
# Starting with Beats version 6.0.0, the dashboards are loaded via the Kibana API.
# This requires a Kibana endpoint configuration.
# setup.kibana:
# Kibana Host
# Scheme and port can be left out and will be set to the default (http and 5601)
# In case you specify and additional path, the scheme is required: http://localhost:5601/path
# IPv6 addresses should always be defined as: https://[2001:db8::1]:5601
#host: "localhost:5601"
#============================= Elastic Cloud ==================================
# These settings simplify using filebeat with the Elastic Cloud (https://cloud.elastic.co/).
# The cloud.id setting overwrites the `output.elasticsearch.hosts` and
# `setup.kibana.host` options.
# You can find the `cloud.id` in the Elastic Cloud web UI.
#cloud.id:
# The cloud.auth setting overwrites the `output.elasticsearch.username` and
# `output.elasticsearch.password` settings. The format is `<user>:<pass>`.
#cloud.auth:
#================================ Outputs =====================================
# Configure what output to use when sending the data collected by the beat.
#-------------------------- Elasticsearch output ------------------------------
# output.elasticsearch:
# Array of hosts to connect to.
# hosts: ["localhost:9200"]
# Optional protocol and basic auth credentials.
#protocol: "https"
#username: "elastic"
#password: "changeme"
#----------------------------- Logstash output --------------------------------
output.logstash:
# The Logstash hosts
hosts: ["192.168.1.110:5044"]
# Optional SSL. By default is off.
# List of root certificates for HTTPS server verifications
#ssl.certificate_authorities: ["/etc/pki/root/ca.pem"]
# Certificate for SSL client authentication
#ssl.certificate: "/etc/pki/client/cert.pem"
# Client Certificate Key
#ssl.key: "/etc/pki/client/cert.key"
#================================ Logging =====================================
# Sets log level. The default log level is info.
# Available log levels are: error, warning, info, debug
logging.level: info
# At debug level, you can selectively enable logging only for some components.
# To enable all selectors use ["*"]. Examples of other selectors are "beat",
# "publish", "service".
#logging.selectors: ["*"]
#============================== Xpack Monitoring ===============================
# filebeat can export internal metrics to a central Elasticsearch monitoring
# cluster. This requires xpack monitoring to be enabled in Elasticsearch. The
# reporting is disabled by default.
# Set to true to enable the monitoring reporter.
#xpack.monitoring.enabled: false
# Uncomment to send the metrics to Elasticsearch. Most settings from the
# Elasticsearch output are accepted here as well. Any setting that is not set is
# automatically inherited from the Elasticsearch output configuration, so if you
# have the Elasticsearch output configured, you can simply uncomment the
# following line.
#xpack.monitoring.elasticsearch:主要是配置filebeat.inputs，采集哪些日志；关闭output.elasticsearch，打开output.logstash，将收集到的信息推送到logstash。
root@centos7 opt# ./filebeat6.3.2/filebeat -e -c ./filebeat6.3.2/filebeat.yml
启动日志如下
代码语言：javascript复制2018-09-03T21:10:38.748 0800 INFO instance/beat.go:492 Home path: [/opt/filebeat6.3.2] Config path: [/opt/filebeat6.3.2] Data path: [/opt/filebeat6.3.2/data] Logs path: [/opt/filebeat6.3.2/logs]
2018-09-03T21:10:38.780 0800 INFO instance/beat.go:499 Beat UUID: 07d523d5-68ef-4470-a99d-5476bbc8535d
2018-09-03T21:10:38.780 0800 INFO [beat] instance/beat.go:716 Beat info {"system_info": {"beat": {"path": {"config": "/opt/filebeat6.3.2", "data": "/opt/filebeat6.3.2/data", "home": "/opt/filebeat6.3.2", "logs": "/opt/filebeat6.3.2/logs"}, "type": "filebeat", "uuid": "07d523d5-68ef-4470-a99d-5476bbc8535d"}}}
2018-09-03T21:10:38.781 0800 INFO [beat] instance/beat.go:725 Build info {"system_info": {"build": {"commit": "45a9a9e1561b6c540e94211ebe03d18abcacae55", "libbeat": "6.3.2", "time": "2018-07-20T04:18:19.000Z", "version": "6.3.2"}}}
2018-09-03T21:10:38.781 0800 INFO [beat] instance/beat.go:728 Go runtime info {"system_info": {"go": {"os":"linux","arch":"amd64","max_procs":1,"version":"go1.9.4"}}}
2018-09-03T21:10:38.800 0800 INFO [beat] instance/beat.go:732 Host info {"system_info": {"host": {"architecture":"x86_64","boot_time":"2018-09-03T15:40:54 08:00","containerized":true,"hostname":"centos7","ips":["127.0.0.1/8","::1/128","192.168.1.111/24","fe80::3928:4541:b030:bea4/64"],"kernel_version":"3.10.0-862.el7.x86_64","mac_addresses":["08:00:27:e9:d7:da"],"os":{"family":"redhat","platform":"centos","name":"CentOS Linux","version":"7 (Core)","major":7,"minor":5,"patch":1804,"codename":"Core"},"timezone":"CST","timezone_offset_sec":28800,"id":"acc3d28b9c824b55b6cdd5c8c2a46705"}}}
2018-09-03T21:10:38.803 0800 INFO [beat] instance/beat.go:761 Process info {"system_info": {"process": {"capabilities": {"inheritable":null,"permitted":["chown","dac_override","dac_read_search","fowner","fsetid","kill","setgid","setuid","setpcap","linux_immutable","net_bind_service","net_broadcast","net_admin","net_raw","ipc_lock","ipc_owner","sys_module","sys_rawio","sys_chroot","sys_ptrace","sys_pacct","sys_admin","sys_boot","sys_nice","sys_resource","sys_time","sys_tty_config","mknod","lease","audit_write","audit_control","setfcap","mac_override","mac_admin","syslog","wake_alarm","block_suspend"],"effective":["chown","dac_override","dac_read_search","fowner","fsetid","kill","setgid","setuid","setpcap","linux_immutable","net_bind_service","net_broadcast","net_admin","net_raw","ipc_lock","ipc_owner","sys_module","sys_rawio","sys_chroot","sys_ptrace","sys_pacct","sys_admin","sys_boot","sys_nice","sys_resource","sys_time","sys_tty_config","mknod","lease","audit_write","audit_control","setfcap","mac_override","mac_admin","syslog","wake_alarm","block_suspend"],"bounding":["chown","dac_override","dac_read_search","fowner","fsetid","kill","setgid","setuid","setpcap","linux_immutable","net_bind_service","net_broadcast","net_admin","net_raw","ipc_lock","ipc_owner","sys_module","sys_rawio","sys_chroot","sys_ptrace","sys_pacct","sys_admin","sys_boot","sys_nice","sys_resource","sys_time","sys_tty_config","mknod","lease","audit_write","audit_control","setfcap","mac_override","mac_admin","syslog","wake_alarm","block_suspend"],"ambient":null}, "cwd": "/opt", "exe": "/opt/filebeat6.3.2/filebeat", "name": "filebeat", "pid": 1579, "ppid": 1454, "seccomp": {"mode":"disabled"}, "start_time": "2018-09-03T21:10:37.710 0800"}}}
2018-09-03T21:10:38.803 0800 INFO instance/beat.go:225 Setup Beat: filebeat; Version: 6.3.2
2018-09-03T21:10:38.804 0800 INFO pipeline/module.go:81 Beat name: centos7
2018-09-03T21:10:38.816 0800 INFO instance/beat.go:315 filebeat start running.
2018-09-03T21:10:38.816 0800 INFO [monitoring] log/log.go:97 Starting metrics logging every 30s
2018-09-03T21:10:38.817 0800 INFO registrar/registrar.go:117 Loading registrar data from /opt/filebeat6.3.2/data/registry
2018-09-03T21:10:38.821 0800 INFO registrar/registrar.go:124 States Loaded from registrar: 1
2018-09-03T21:10:38.821 0800 WARN beater/filebeat.go:354 Filebeat is unable to load the Ingest Node pipelines for the configured modules because the Elasticsearch output is not configured/enabled. If you have already loaded the Ingest Node pipelines or are using Logstash pipelines, you can ignore this warning.
2018-09-03T21:10:38.821 0800 INFO crawler/crawler.go:48 Loading Inputs: 1
2018-09-03T21:10:38.822 0800 INFO log/input.go:118 Configured paths: [/log/*.log]
2018-09-03T21:10:38.822 0800 INFO input/input.go:88 Starting input of type: log; ID: 8294414020995878211
2018-09-03T21:10:38.866 0800 INFO crawler/crawler.go:82 Loading and starting Inputs completed. Enabled inputs: 1
2018-09-03T21:10:38.867 0800 INFO cfgfile/reload.go:122 Config reloader started
2018-09-03T21:10:38.867 0800 INFO cfgfile/reload.go:214 Loading of config files completed.
2018-09-03T21:10:38.883 0800 INFO log/harvester.go:228 Harvester started for file: /log/spring-boot-integrate.log.2018-08-21.log
2018-09-03T21:11:08.819 0800 INFO [monitoring] log/log.go:124 Non-zero metrics in the last 30s {"monitoring": {"metrics": {"beat":{"cpu":{"system":{"ticks":50,"time":{"ms":54}},"total":{"ticks":70,"time":{"ms":83},"value":70},"user":{"ticks":20,"time":{"ms":29}}},"info":{"ephemeral_id":"faaf6d3e-8fff-4670-9dca-c51b48b134c8","uptime":{"ms":30102}},"memstats":{"gc_next":5931008,"memory_alloc":3006968,"memory_total":4960192,"rss":15585280}},"filebeat":{"events":{"added":93,"done":93},"harvester":{"open_files":1,"running":1,"started":1}},"libbeat":{"config":{"module":{"running":0},"reloads":1},"output":{"events":{"acked":91,"batches":1,"total":91},"read":{"bytes":6},"type":"logstash","write":{"bytes":5990}},"pipeline":{"clients":1,"events":{"active":0,"filtered":2,"published":91,"retry":91,"total":93},"queue":{"acked":91}}},"registrar":{"states":{"current":1,"update":93},"writes":{"success":3,"total":3}},"system":{"cpu":{"cores":1},"load":{"1":0.05,"15":0.05,"5":0.03,"norm":{"1":0.05,"15":0.05,"5":0.03}}}}}}采集的是/log下的所有的log文件，我们就用工程：spring-boot-integrate来产生log文件（对应的就是我们的项目产生的日志文件）；spring-boot-integrate依赖127.0.0.1的redis和mysql，需要把redis和mysql启动起来（注意我的redis是配置了密码的，mysql用的数据库是spring-boot，sql文件在工程中）。
root@centos7 redis-3.2.12# cd /usr/local/redis-3.2.12/
root@centos7 redis-3.2.12# ./src/redis-server redis.conf
root@centos7 local# service mysqld start
启动我们的spring-boot-integrate
用maven生成war包，将spring-boot-integrate.war包拷贝到tomcat的webapps，启动tomcat即可；注意tomcat版本需要8及以上；
root@centos7 opt# cd /usr/local/apache-tomcat-8.5.33/
root@centos7 apache-tomcat-8.5.33# ./bin/startup.sh
访问：http://192.168.1.111:8080/spring-boot-integrate，如下图
说明应用启动成功，我们可以参照：spring-boot-2.0.3不一样系列之shiro - 搭建篇，访问应用，多产生一些日志数据。
效果
最终数据到kibana进行可视化展示，我们看看我们刚刚的日志在kibana中的展示情况
总结
架构图
一般而言，架构图如下
由nginx对外暴露访问接口，并提供负载均衡功能。本文中没有集成nginx，大家可以自己去实现，集成nginx也不难。
另外也没有集成消息中间件
这种架构适合于日志规模比较庞大的情况。但由于 Logstash 日志解析节点和 Elasticsearch 的负荷比较重，可将他们配置为集群模式，以分担负荷。引入消息队列，均衡了网络传输，从而降低了网络闭塞，尤其是丢失数据的可能性，但依然存在 Logstash 占用系统资源过多的问题。
2、基于docker的搭建
ELK版本迭代非常快，如果能基于docker做成镜像，基于docker搭建，既方便ELK的统一搭建、也方便ELK的升级；有兴趣的小伙伴可以试着搭建。
3、组件组合
本文只是简单的实现了ELK Filebeat各个组件都是单节点的集成，相当于搭建了最基础版本；当然有了这个基础版本，再搭建某些组件的集群版本也不难了。
另外，组件之间是可以灵活组合的，有些组件也不是必须的，我们可以根据我们业务量的需求来搭建合适的日志系统。
4、组件详情
本文只是讲elk filebeat的搭建，各个组件的详情没有具体介绍，需要大家自己去了解了；各个组件的内容还是挺多的，更好的了解各个组件，对搭建高性能的日志系统有很大帮助。
参考
谈日志的重要性】运维中被低估的日志
集中式日志系统 ELK 协议栈详解
ELK Filebeat 集中式日志解决方案详解
从零开始搭建ELK GPE监控预警系统
