Asp.net Core + Log4net + ELK 搭建日志中心

Docker中一键安装ELK

对于这种工具类的东西，第一步就直接到docker的hub中查找了,很幸运，不仅有Elasticsearch,kibana,logstash 单独的镜像，而且还直接 有ELK的镜像。

sudo docker run -p 5601:5601 -p 9200:9200 -p 5044:5044 -d --name log-platform --restart always sebp/elk

这当然能少好多配置，毫不犹豫就选择了elk的镜像， 运行起来！如果没有异常的话相信就很容易的跑起来了(最有可能出现的问题就是虚拟内存不足了，可以百度找解决方案这里就不在详细说了)

项目中添加log4net到Elasticseach的Appender

因为在.net core 之前就有搭建过日志中心，所以对于appender还记得有一个Log4net.Elasticsearch的dll，但是在查看资料之后发现很久没有更新 也不支持.net standard。在决定自己实现appender之前，抱着侥幸心理去查找了一翻，既然找到一个支持.net core的开源项目log4stash。很幸运，又可以不要造轮子了，哈哈。log4Stash使用很简单，但是配置的东西还挺多的而且作者也没有很好的文档介绍，先不管其他的用起来在说。

项目中添加log4stash

Install-Package log4stash -Version 2.2.1

修改log4net.config
在log4net.config中添加appender

<appender type="log4stash.ElasticSearchAppender, log4stash"> <Server>localhost</Server> <Port>9200</Port> <IndexName>log_test_%{+yyyy-MM-dd}</IndexName> <IndexType>LogEvent</IndexType> <Bulksize>2000</Bulksize> <BulkIdleTimeout>10000</BulkIdleTimeout> <IndexAsync>True</IndexAsync> </appender>

另外附上全部的配置信息

<appender type="log4stash.ElasticSearchAppender, log4stash"> <Server>localhost</Server> <Port>9200</Port> <!-- optional: in case elasticsearch is located behind a reverse proxy the URL is like :Port/Path, default = empty string --> <Path>/es5</Path> <IndexName>log_test_%{+yyyy-MM-dd}</IndexName> <IndexType>LogEvent</IndexType> <Bulksize>2000</Bulksize> <BulkIdleTimeout>10000</BulkIdleTimeout> <IndexAsync>False</IndexAsync> <DocumentIdSource>IdSource</DocumentIdSource> <!-- obsolete! use IndexOperationParams --> <!-- Serialize log object as json (default is true). -- This in case you log the object this way: `logger.Debug(obj);` and not: `logger.Debug("string");` --> <SerializeObjects>True</SerializeObjects> <!-- optional: elasticsearch timeout for the request, default = 10000 --> <ElasticSearchTimeout>10000</ElasticSearchTimeout> <!--You can add parameters to the request to control the parameters sent to ElasticSearch. for example, as you can see here, you can add a routing specification to the appender. The Key is the key to be added to the request, and the value is the parameter's name in the log event properties.--> <IndexOperationParams> <Parameter> <Key>_routing</Key> <Value>%{RoutingSource}</Value> </Parameter> <Parameter> <Key>_id</Key> <Value>%{IdSource}</Value> </Parameter> <Parameter> <Key>key</Key> <Value>value</Value> </Parameter> </IndexOperationParams> <!-- for more information read about log4net.Core.FixFlags --> <FixedFields>Partial</FixedFields> <Template> <Name>templateName</Name> <FileName>path2template.json</FileName> </Template> <!--Only one credential type can used at once--> <!--Here we list all possible types--> <AuthenticationMethod> <!--For basic authentication purposes--> <Basic> <Username>Username</Username> <Password>Password</Password> </Basic> <!--For AWS ElasticSearch service--> <Aws> <Aws4SignerSecretKey>Secret</Aws4SignerSecretKey> <Aws4SignerAccessKey>AccessKey</Aws4SignerAccessKey> <Aws4SignerRegion>Region</Aws4SignerRegion> </Aws> </AuthenticationMethod> <!-- all filters goes in ElasticFilters tag --> <ElasticFilters> <Add> <Key>@type</Key> <Value>Special</Value> </Add> <!-- using the @type value from the previous filter --> <Add> <Key>SmartValue</Key> <Value>the type is %{@type}</Value> </Add> <Remove> <Key>@type</Key> </Remove> <!-- you can load custom filters like I do here --> <Filter type="log4stash.Filters.RenameKeyFilter, log4stash"> <Key>SmartValue</Key> <RenameTo>SmartValue2</RenameTo> </Filter> <!-- converts a json object to fields in the document --> <Json> <SourceKey>JsonRaw</SourceKey> <FlattenJson>false</FlattenJson> <!-- the separator property is only relevant when setting the FlattenJson property to 'true' --> <Separator>_</Separator> </Json> <!-- converts an xml object to fields in the document --> <Xml> <SourceKey>XmlRaw</SourceKey> <FlattenXml>false</FlattenXml> </Xml> <!-- kv and grok filters similar to logstash's filters --> <Kv> <SourceKey>Message</SourceKey> <ValueSplit>:=</ValueSplit> <FieldSplit> ,</FieldSplit> </kv> <Grok> <SourceKey>Message</SourceKey> <Pattern>the message is %{WORD:Message} and guid %{UUID:the_guid}</Pattern> <Overwrite>true</Overwrite> </Grok> <!-- Convert string like: "1,2, 45 9" into array of numbers [1,2,45,9] --> <ConvertToArray> <SourceKey>someIds</SourceKey> <!-- The separators (space and comma) --> <Seperators>, </Seperators> </ConvertToArray> <Convert> <!-- convert given key to string --> <ToString>shouldBeString</ToString> <!-- same as ConvertToArray. Just for convenience --> <ToArray> <SourceKey>anotherIds</SourceKey> </ToArray> </Convert> </ElasticFilters> </appender>

最后别忘了在root中添加上appender

<root> <level value="WARN" /> <appender-ref ref="ElasticSearchAppender" /> </root>

OK,项目的配置就到这里结束了,可以运行项目写入一些测试的日志了。

在kibana建立Index Pattern