logstash json和rubydebug 第次重启logstash都会把所有的日志读完 而不是只读入新输入的内容
查看一下agent端的shipper的配置：
# cat logstash_test2.shipper.conf input { file { path => ["/apps/logstash/conf/test/test2_log.txt"] start_position => "beginning" sincedb_path => "/dev/null" } } output { stdout { #codec => rubydebug codec => json } } #这个测试主要是看输出的格式为json的
先简测一下刚配好的shipper：
# ./../bin/logstash -f logstash_test2.shipper.conf -t Sending Logstash's logs to /apps/logstash/logs which is now configured via log4j2.properties Configuration OK [2016-12-08T18:14:27,771][INFO ][logstash.runner ] Using config.test_and_exit mode. Config Validation Result: OK. Exiting Logstash
可以看到没有报错，接下来启动logstash并指定刚才配置好的配置文件：
# ./../bin/logstash -f logstash_test2.shipper.conf -t Sending Logstash's logs to /apps/logstash/logs which is now configured via log4j2.properties Configuration OK [2016-12-08T18:14:27,771][INFO ][logstash.runner ] Using config.test_and_exit mode. Config Validation Result: OK. Exiting Logstash [root@Appsrv130 conf]# ./../bin/logstash -f logstash_test2.shipper.conf Sending Logstash's logs to /apps/logstash/logs which is now configured via log4j2.properties [2016-12-08T18:19:13,056][INFO ][logstash.pipeline ] Starting pipeline {"id"=>"main", "pipeline.workers"=>4, "pipeline.batch.size"=>125, "pipeline.batch.delay"=>5, "pipeline.max_inflight"=>500} [2016-12-08T18:19:13,085][INFO ][logstash.pipeline ] Pipeline main started [2016-12-08T18:19:13,165][INFO ][logstash.agent ] Successfully started Logstash API endpoint {:port=>9601} {"path":"/apps/logstash/conf/test/test2_log.txt","@timestamp":"2016-12-08T10:19:13.102Z","@version":"1","host":"ofs1","message":"haha------>","tags":[]}{"path":"/apps/logstash/conf/test/test2_log.txt","@timestamp":"2016-12-08T10:19:13.113Z","@version":"1","host":"ofs1","message":"haha------>2","tags":[]}{"path":"/apps/logstash/conf/test/test2_log.txt","@timestamp":"2016-12-08T10:19:13.118Z","@version":"1","host":"ofs1","message":"haha------>3","tags":[]}{"path":"/apps/logstash/conf/test/test2_log.txt","@timestamp":"2016-12-08T10:19:13.121Z","@version":"1","host":"ofs1","message":"haha------>3","tags":[]}
再看看所监控的log日志的内容：
# cat test/test2_log.txt haha------> haha------>2 haha------>3 haha------>3
发现 这个shipper启动的时候会从头到尾，把配置文件全读一边（这种效里也是从配置文件中配置好的）
再看一下这个配置文件：
# cat logstash_test2.shipper.conf input { file { path => ["/apps/logstash/conf/test/test2_log.txt"] start_position => "beginning" sincedb_path => "/dev/null" } } output { stdout { #codec => rubydebug codec => json } } #要点就是这行sincedb_path =>"/dev/null"了！该参数用来指定sincedb文件名，但是如果我们设置为/dev/null这个linux系统上特殊的空洞文件，
那么logstash每次重启进程的时候，尝试读取sincedb内容，都只会读到空洞，也就可以理解为前不有过运行记录，自然就从初始位置开始读取了！
下面往监控文件里写入内容时，会发生下面变化：
# echo "查看json格式是什么输出－－－－－－－》">>test/test2_log.txt
再看一下输出的内容：
# ./../bin/logstash -f logstash_test2.shipper.conf -t Sending Logstash's logs to /apps/logstash/logs which is now configured via log4j2.properties Configuration OK [2016-12-08T18:14:27,771][INFO ][logstash.runner ] Using config.test_and_exit mode. Config Validation Result: OK. Exiting Logstash [root@Appsrv130 conf]# ./../bin/logstash -f logstash_test2.shipper.conf Sending Logstash's logs to /apps/logstash/logs which is now configured via log4j2.properties [2016-12-08T18:19:13,056][INFO ][logstash.pipeline ] Starting pipeline {"id"=>"main", "pipeline.workers"=>4, "pipeline.batch.size"=>125, "pipeline.batch.delay"=>5, "pipeline.max_inflight"=>500} [2016-12-08T18:19:13,085][INFO ][logstash.pipeline ] Pipeline main started [2016-12-08T18:19:13,165][INFO ][logstash.agent ] Successfully started Logstash API endpoint {:port=>9601} {"path":"/apps/logstash/conf/test/test2_log.txt","@timestamp":"2016-12-08T10:19:13.102Z","@version":"1","host":"ofs1","message":"haha------>","tags":[]}{"path":"/apps/logstash/conf/test/test2_log.txt","@timestamp":"2016-12-08T10:19:13.113Z","@version":"1","host":"ofs1","message":"haha------>2","tags":[]}{"path":"/apps/logstash/conf/test/test2_log.txt","@timestamp":"2016-12-08T10:19:13.118Z","@version":"1","host":"ofs1","message":"haha------>3","tags":[]}{"path":"/apps/logstash/conf/test/test2_log.txt","@timestamp":"2016-12-08T10:19:13.121Z","@version":"1","host":"ofs1","message":"haha------>3","tags":[]}{"path":"/apps/logstash/conf/test/test2_log.txt","@timestamp":"2016-12-08T11:17:45.060Z","@version":"1","host":"ofs1","message":"查看json格式是什么输出－－－－－－－》","tags":[]}
修改配置文件：
# cat logstash_test2.shipper.conf input { file { path => ["/apps/logstash/conf/test/test2_log.txt"] start_position => "beginning" sincedb_path => "/dev/null" } } output { stdout { codec => rubydebug #查看这种格式的日志输出 #codec => json } }
查看日志:
# echo "查看rubydebug格式是什么输出－－－－－－－》">>test/test2_log.txt
# ./../bin/logstash -f logstash_test2.shipper.conf Sending Logstash's logs to /apps/logstash/logs which is now configured via log4j2.properties [2016-12-08T19:22:37,214][INFO ][logstash.pipeline ] Starting pipeline {"id"=>"main", "pipeline.workers"=>4, "pipeline.batch.size"=>125, "pipeline.batch.delay"=>5, "pipeline.max_inflight"=>500} [2016-12-08T19:22:37,260][INFO ][logstash.pipeline ] Pipeline main started [2016-12-08T19:22:37,338][INFO ][logstash.agent ] Successfully started Logstash API endpoint {:port=>9601} { "path" => "/apps/logstash/conf/test/test2_log.txt", "@timestamp" => 2016-12-08T11:22:37.290Z, "@version" => "1", "host" => "ofs1", "message" => "haha------>", "tags" => [] } { "path" => "/apps/logstash/conf/test/test2_log.txt", "@timestamp" => 2016-12-08T11:22:37.299Z, "@version" => "1", "host" => "ofs1", "message" => "haha------>2", "tags" => [] } { "path" => "/apps/logstash/conf/test/test2_log.txt", "@timestamp" => 2016-12-08T11:22:37.301Z, "@version" => "1", "host" => "ofs1", "message" => "haha------>3", "tags" => [] } { "path" => "/apps/logstash/conf/test/test2_log.txt", "@timestamp" => 2016-12-08T11:22:37.302Z, "@version" => "1", "host" => "ofs1", "message" => "haha------>3", "tags" => [] } { "path" => "/apps/logstash/conf/test/test2_log.txt", "@timestamp" => 2016-12-08T11:22:37.303Z, "@version" => "1", "host" => "ofs1", "message" => "查看json格式是什么输出－－－－－－－》", "tags" => [] } { "path" => "/apps/logstash/conf/test/test2_log.txt", "@timestamp" => 2016-12-08T11:24:32.415Z, "@version" => "1", "host" => "ofs1", "message" => "查看rubydebug格式是什么输出－－－－－－－》", "tags" => [] }
如果去掉上面的两个参数，看一下效果:
# cat logstash_test2.shipper.conf input { file { path => ["/apps/logstash/conf/test/test2_log.txt"] #start_position => "beginning" #sincedb_path => "/dev/null" } } output { stdout { codec => rubydebug #codec => json } }
从另一个shell可以看到效果：
# ./../bin/logstash -f logstash_test2.shipper.conf Sending Logstash's logs to /apps/logstash/logs which is now configured via log4j2.properties [2016-12-09T13:27:59,792][INFO ][logstash.pipeline ] Starting pipeline {"id"=>"main", "pipeline.workers"=>4, "pipeline.batch.size"=>125, "pipeline.batch.delay"=>5, "pipeline.max_inflight"=>500} [2016-12-09T13:27:59,865][INFO ][logstash.pipeline ] Pipeline main started [2016-12-09T13:27:59,960][INFO ][logstash.agent ] Successfully started Logstash API endpoint {:port=>9601}
先导入数据:
echo '去掉参数start_position => "beginning" sincedb_path => "/dev/null"' >>test/test2_log.txt
下面看一下效果:
# ./../bin/logstash -f logstash_test2.shipper.conf Sending Logstash's logs to /apps/logstash/logs which is now configured via log4j2.properties [2016-12-09T13:41:38,860][INFO ][logstash.pipeline ] Starting pipeline {"id"=>"main", "pipeline.workers"=>4, "pipeline.batch.size"=>125, "pipeline.batch.delay"=>5, "pipeline.max_inflight"=>500} [2016-12-09T13:41:38,881][INFO ][logstash.pipeline ] Pipeline main started [2016-12-09T13:41:38,964][INFO ][logstash.agent ] Successfully started Logstash API endpoint {:port=>9601} { "path" => "/apps/logstash/conf/test/test2_log.txt", "@timestamp" => 2016-12-09T05:45:53.155Z, "@version" => "1", "host" => "ofs1", "message" => "去掉参数start_position => \"beginning\" sincedb_path => \"/dev/null\"", "tags" => [] }
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