Logstash 7.0.1 - CSV upload with subheaders

Elastic Stack Logstash
1

Hello, I am trying to upload a csv file using Logstash 7.0.1 that contains subheaders. For example:

"netflow": {
      "flow_seq_num": 55729,
      "flowset_id": 259,
      "flow_end_msec": 1562002327000,
      "version": 9,
      "layer2OctetDeltaCount": 802218000,
      "in_bytes": 792669846,
      "in_pkts": 530453,
      "flow_start_msec": 1562002315000
    }

However, it seems to end up all being stored in a message: block when uploading.

The following are the csv fields for download:

output{
  csv{
    fields => ["[node][hostname]","[node][ipaddr]", "[event][host]", "[event][type]", "@version", 
	"@timestamp","[flow][ip_protocol]", "[flow][packets]", "[flow][src_addr]", "[flow][src_hostname]", 
	"[flow][src_port_name]", "[flow][direction]", "[flow][traffic_locality]", "[flow][src_autonomous_system]", 
	"[flow][dst_port_name]","[flow][input_snmp]", "[flow][ip_version]", "[flow][bytes]", "[flow][dst_addr]", 
	"[flow][sampling_interval]", "[flow][dst_hostname]", "[flow][dst_autonomous_system]", "[flow][input_ifname]",
	"[netflow][flow_seq_num]", "[netflow][flowset_id]","[netflow][flow_end_msec]", "[netflow][version]",
	"[netflow][layer2OctetDeltaCount]","[netflow][in_bytes]","[netflow][in_pkts]","[netflow][flow_start_msec]"]
    path => "Flow_csv.csv"
  }
}

For CSV Upload, I use the same fields, but for the columns:

input {
  file {
    path => "home/data/*.csv"
    start_position => "beginning"
   sincedb_path => "/dev/null"
  }
}
filter {
  csv {
      separator => ","
      columns => ["[node][hostname]","[node][ipaddr]", "[event][host]", "[event][type]", "@version",
        "@timestamp","[flow][ip_protocol]", "[flow][packets]", "[flow][src_addr]", "[flow][src_hostname]",
        "[flow][src_port_name]", "[flow][direction]", "[flow][traffic_locality]", "[flow][src_autonomous_system]",
        "[flow][dst_port_name]","[flow][input_snmp]", "[flow][ip_version]", "[flow][bytes]", "[flow][dst_addr]",
        "[flow][sampling_interval]", "[flow][dst_hostname]", "[flow][dst_autonomous_system]", "[flow][input_ifname]",
        "[netflow][flow_seq_num]", "[netflow][flowset_id]","[netflow][flow_end_msec]", "[netflow][version]",
        "[netflow][layer2OctetDeltaCount]","[netflow][in_bytes]","[netflow][in_pkts]","[netflow][flow_start_msec]"]
  }
}
output {
   elasticsearch {
     hosts => "ipaddress.com:9200"
     index => "elastiflow-2019-07-01"
  }
}

The errors I get:

[2019-07-01T15:31:36,841][WARN ][logstash.filters.csv     ] Error parsing csv {:field=>"message", :source=>"10.1.1.253,10.1.1.253,10.1.1.253,netflow,3.5.0,2019-07-01T19:05:19.000Z,UDP,3,10.1.1.253,10.1.1.253,UDP/50101,unspecified,private,private,netflow (UDP/2055),541,IPv4,400,10.2.1.50,0,10.2.1.50,private,index: 541,149803,257,,9,,400,3,", :exception=>#<TypeError: wrong argument type String (expected LogStash::Timestamp)>}

Is there an issue with the upload formatting?

Thanks,
Eric

2

The field @timestamp has type Logstash::TimeStamp, but you are trying to set it to a string value. In your list of columns, change "@timestamp" to
"[@metadata][timestamp]" then add a date filter to parse it

date { match => [ "[@metadata][timestamp]", ISO8601 ] }
3

That worked!

Thank you
Eric

4

One more question, when I uploaded the editted conf file, is there a way to let ES create the types associated with each field? Or is that something that will manually have to be done in the management of Kibana?

Thanks,
Eric

5

Yes, you can iterate over the fields in an object and see which can be converted to numeric forms using a ruby filter with code like this.

6

Great, Thank you!

Eric

7

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