2 、Logstash的简介
2.1 logstash 介绍
LogStash由JRuby语言编写，基于消息（message-based）的简单架构，并运行在Java虚拟机（JVM）上。不同于分离的代理端（agent）或主机端（server），LogStash可配置单一的代理端（agent）与其它开源软件结合，以实现不同的功能。
2.2 logStash的四大组件
Shipper：发送事件（events）至LogStash；通常，远程代理端（agent）只需要运行这个组件即可；
Broker and Indexer：接收并索引化事件；
Search and Storage：允许对事件进行搜索和存储；
Web Interface：基于Web的展示界面
正是由于以上组件在LogStash架构中可独立部署，才提供了更好的集群扩展性。
2.3、软件包下载网址：https://www.elastic.co/cn/downloads/logstash
2.4、将下载的tar压缩包拷贝到/application/目录下，并创建软链接/application/logstash。
2.5、循环渐近的学习logstash
2.5.1 启动一个logstash,-e：在命令行执行；input输入，stdin标准输入，是一个插件；output输出，stdout：标准输出。默认输出格式是使用rubudebug显示详细输出，codec为一种编解码器
[root@harlan_ansible ~]# /application/logstash/bin/logstash -e 'input {stdin{}} output {stdout{}}'
OpenJDK -Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.headius.backport9.modules.Modules (file:/application/logstash-7.3./logstash-core/lib/jars/jruby-complete-9.2.7.0.jar) to field java.io.FileDescriptor.fd
WARNING: Please consider reporting this to the maintainers of com.headius.backport9.modules.Modules
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Thread.exclusive is deprecated, use Thread::Mutex
Sending Logstash logs to /application/logstash/logs which is now configured via log4j2.properties
[--27T21::,][WARN ][logstash.config.source.multilocal] Ignoring the 'pipelines.yml' file because modules or command line options are specified
[--27T21::,][INFO ][logstash.runner ] Starting Logstash {"logstash.version"=>"7.3.2"}
[--27T21::,][INFO ][org.reflections.Reflections] Reflections took ms to scan urls, producing keys and values
[--27T21::,][WARN ][org.logstash.instrument.metrics.gauge.LazyDelegatingGauge] A gauge metric of an unknown type (org.jruby.RubyArray) has been create for key: cluster_uuids. This may result in invalid serialization. It is recommended to log an issue to the responsible developer/development team.
[--27T21::,][INFO ][logstash.javapipeline ] Starting pipeline {:pipeline_id=>"main", "pipeline.workers"=>, "pipeline.batch.size"=>, "pipeline.batch.delay"=>, "pipeline.max_inflight"=>, :thread=>"#<Thread:0x1b23cd0d run>"}
[--27T21::,][INFO ][logstash.javapipeline ] Pipeline started {"pipeline.id"=>"main"}
The stdin plugin is now waiting for input:
[--27T21::,][INFO ][logstash.agent ] Pipelines running {:count=>, :running_pipelines=>[:main], :non_running_pipelines=>[]}
[--27T21::,][INFO ][logstash.agent ] Successfully started Logstash API endpoint {:port=>}
hello word #手动输入一串字符，然后下面在屏幕上会标准输出。
/application/logstash-7.3./vendor/bundle/jruby/2.5./gems/awesome_print-1.7./lib/awesome_print/formatters/base_formatter.rb:: warning: constant ::Fixnum is deprecated
{
"message" => "hello word",
"@version" => "",
"@timestamp" => --27T13::.241Z,
"host" => "harlan_ansible"
}2.5.2 将屏幕输入的字符串输出到elasticsearch服务中
[root@harlan_ansible ~]# /application/logstash/bin/logstash -e 'input { stdin{} } output { elasticsearch { hosts => ["127.0.0.1:9200"] } }'
OpenJDK -Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.headius.backport9.modules.Modules (file:/application/logstash-7.3./logstash-core/lib/jars/jruby-complete-9.2.7.0.jar) to field java.io.FileDescriptor.fd
WARNING: Please consider reporting this to the maintainers of com.headius.backport9.modules.Modules
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Thread.exclusive is deprecated, use Thread::Mutex
Sending Logstash logs to /application/logstash/logs which is now configured via log4j2.properties
[--27T21::,][WARN ][logstash.config.source.multilocal] Ignoring the 'pipelines.yml' file because modules or command line options are specified
[--27T21::,][INFO ][logstash.runner ] Starting Logstash {"logstash.version"=>"7.3.2"}
[--27T21::,][INFO ][org.reflections.Reflections] Reflections took ms to scan urls, producing keys and values
[--27T21::,][INFO ][logstash.outputs.elasticsearch] Elasticsearch pool URLs updated {:changes=>{:removed=>[], :added=>[http://127.0.0.1:9200/]}}
[--27T21::,][WARN ][logstash.outputs.elasticsearch] Restored connection to ES instance {:url=>"http://127.0.0.1:9200/"}
[--27T21::,][INFO ][logstash.outputs.elasticsearch] ES Output version determined {:es_version=>}
[--27T21::,][WARN ][logstash.outputs.elasticsearch] Detected a .x and above cluster: the `type` event field won't be used to determine the document _type {:es_version=>7}
[--27T21::,][INFO ][logstash.outputs.elasticsearch] New Elasticsearch output {:class=>"LogStash::Outputs::ElasticSearch", :hosts=>["//127.0.0.1:9200"]}
[--27T21::,][INFO ][logstash.outputs.elasticsearch] Using default mapping template
[--27T21::,][WARN ][org.logstash.instrument.metrics.gauge.LazyDelegatingGauge] A gauge metric of an unknown type (org.jruby.specialized.RubyArrayOneObject) has been create for key: cluster_uuids. This may result in invalid serialization. It is recommended to log an issue to the responsible developer/development team.
[--27T21::,][INFO ][logstash.javapipeline ] Starting pipeline {:pipeline_id=>"main", "pipeline.workers"=>, "pipeline.batch.size"=>, "pipeline.batch.delay"=>, "pipeline.max_inflight"=>, :thread=>"#<Thread:0x228d3610 run>"}
[--27T21::,][INFO ][logstash.javapipeline ] Pipeline started {"pipeline.id"=>"main"}
[--27T21::,][INFO ][logstash.outputs.elasticsearch] Attempting to install template {:manage_template=>{"index_patterns"=>"logstash-*", "version"=>, "settings"=>{"index.refresh_interval"=>"5s", "number_of_shards"=>, "index.lifecycle.name"=>"logstash-policy", "index.lifecycle.rollover_alias"=>"logstash"}, "mappings"=>{"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"=>}}}}}], "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"}}}}}}}
The stdin plugin is now waiting for input:
[--27T21::,][INFO ][logstash.outputs.elasticsearch] Installing elasticsearch template to _template/logstash
[--27T21::,][INFO ][logstash.agent ] Pipelines running {:count=>, :running_pipelines=>[:main], :non_running_pipelines=>[]}
[--27T21::,][INFO ][logstash.agent ] Successfully started Logstash API endpoint {:port=>}
[--27T21::,][INFO ][logstash.outputs.elasticsearch] Creating rollover alias <logstash-{now/d}->
[--27T21::,][INFO ][logstash.outputs.elasticsearch] Installing ILM policy {"policy"=>{"phases"=>{"hot"=>{"actions"=>{"rollover"=>{"max_size"=>"50gb", "max_age"=>"30d"}}}}}} to _ilm/policy/logstash-policy
hello #手动输入一个字符串。通过浏览器访问地址：http://10.0.0.169:9200/_search?pretty
恭喜，至此你已经成功利用Elasticsearch和Logstash来收集日志数据了。
2.6、 收集系统日志的conf
conf文件放置在/application/logstash/bin/目录下，具体配置如下：
input {
file {
path => "/var/log/messages"
type => "system"
start_position => "beginning"
}
file {
path => "/application/es/to/logs/elasticsearch.log"
type => "es-error"
start_position => "beginning"
}
}
output {
if [type] == "system" {
elasticsearch {
hosts => ["10.0.0.169:9200"]
index => "system-%{+YYYY.MM.dd}"
}
}
if [type] == "es-error" {
elasticsearch {
hosts => ["10.0.0.169:9200"]
index => "es-error-%{+YYYY.MM.dd}"
}
}
}执行命令启动logstash服务:
/application/logstash/bin/logstash -f logstash.conf