Logstash - import nested JSON into Elasticsearch - json

Question

I have a large amount (~40000) of nested JSON objects I want to insert into elasticsearch an index.
The JSON objects are structured like this:
{
"customerid": "10932"
"date": "16.08.2006",
"bez": "xyz",
"birthdate": "21.05.1990",
"clientid": "2",
"address": [
{
"addressid": "1",
"tile": "Mr",
"street": "main str",
"valid_to": "21.05.1990",
"valid_from": "21.05.1990",
},
{
"addressid": "2",
"title": "Mr",
"street": "melrose place",
"valid_to": "21.05.1990",
"valid_from": "21.05.1990",
}
]
}
So a JSON field (address in this example) can have an array of JSON objects.
What would a logstash config look like to import JSON files/objects like this into elasticsearch? The elasticsearch mapping for this index should just look like the structure of the JSON. The elasticsearch document id should be set to customerid.
input {
stdin {
id => "JSON_TEST"
}
}
filter {
json{
source => "customerid"
....
....
}
}
output {
stdout{}
elasticsearch {
hosts => "https://localhost:9200/"
index => "customers"
document_id => "%{customerid}"
}
}

Answer 1

If you have control of what's being generated, the easiest thing to do is to format you input as single line json and then use the json_lines codec.
Just change your stdin to:
stdin { codec => "json_lines" }
and then it'll just work:
cat input_file.json | logstash -f json_input.conf
where input_file.json has lines like:
{"customerid":1,"nested": {"json":"here"}}
{"customerid":2,"nested": {"json":"there"}}
and then you won't need the json filter.