logstash output to influxdb

logstash.conf

output {
      http {
            url => "http://influxdb.example.com/db/<database>/series?u=<user>&p=<pass>"
            http_method => "POST"
      }
}

output.json

{
    "name" : "cpu_percent_used",
    "columns" : ["value", "host"],
    "points" : [
        [99.9, "serverX"]
    ]
}