title: How to pass dynamic variable value to Filebeat?
body: <p>I am new to ELK stack. I configured ELK stack Filebeat, Logstash, ElasticSearch, Kibana by updating related configuration(yml) files. It was working fine but What I was trying to do I changed the filebeat configuration parameter name with variable as follows so that I can pass it filebeat from command line.<a href="https://i.stack.imgur.com/3rcSp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3rcSp.png" alt="enter image description here"></a></p>
  
  <p>But when I try to launch it as </p>
  
  <pre><code>filebeat -c filebeat.yml -e -E name=myindex
  </code></pre>
  
  <p>It started showing an error as follows:</p>
  
  <pre><code>rkumar@ROHIT2K8R2 C:\Users\rkumar\Desktop\ELK\filebeat-5.4.3-windows-x86
  $ filebeat -c filebeat.yml -e -E name=myindex
  runtime: goroutine stack exceeds 1000000000-byte limit
  fatal error: stack overflow
  
  runtime stack:
  runtime.throw(0xa0012e, 0xe)
          /usr/local/go/src/runtime/panic.go:566 +0x9c
  runtime.newstack()
          /usr/local/go/src/runtime/stack.go:1061 +0x424
  runtime.morestack()
          /usr/local/go/src/runtime/asm_amd64.s:366 +0x87
  
  goroutine 1 [running]:
  runtime.mapaccess2_faststr(0x9680e0, 0xc042196210, 0xc0421960f0, 0x25, 0x0, 0x0)
          /usr/local/go/src/runtime/hashmap_fast.go:297 fp=0xc0621892c0 sp=0xc0621892b8
  github.com/elastic/beats/vendor/github.com/elastic/go-ucfg.valueCache.cachedValue(0xc042196210, 0xc0421960f0, 0x25, 0xc062189390, 0x0, 0x0, 0x0, 0x0)
          /go/src/github.com/elastic/beats/vendor/github.com/elastic/go-ucfg/opts.go:125 +0x6d fp=0xc062189350 sp=0xc0621892c0
  github.com/elastic/beats/vendor/github.com/elastic/go-ucfg.(*cfgDynamic).getValue(0xc042100410, 0xc042166580, 0xc0421960f0, 0x25, 0xc04203ea48, 0x1)
          /go/src/github.com/elastic/beats/vendor/github.com/elastic/go-ucfg/types.go:473 +0x7a fp=0xc0621893b8 sp=0xc062189350
  ...additional frames elided...
  
  goroutine 20 [syscall]:
  os/signal.signal_recv(0x0)
          /usr/local/go/src/runtime/sigqueue.go:116 +0x15e
  os/signal.loop()
          /usr/local/go/src/os/signal/signal_unix.go:22 +0x29
  created by os/signal.init.1
          /usr/local/go/src/os/signal/signal_unix.go:28 +0x48
  </code></pre>