DSL Aggregations: How to get results, even if one of the aggs field is not present?

Elastic Stack Elasticsearch
1

We have to do aggregations for
host.os.name, host.name, host.ip

99% data has host.os.name
95% has host.name
25% has host.ip

How to ensure I get all the results, even if the field is not present?

So i'm looking for a table like

| host.os  |host.name   |  host.ip | count|
|---|---|---|--|
|linux   | mylinuxhost1  |   172.2.3.4|20|
|linux   | mylinuxhost2  |   NULL|10|
| windows  |  winhost1 | 12.2.3.4  |100|
| windows  |  winhost1 | NULL  |5|

I was just doing like below, the output gives me ONLY if all the fields are present

           "aggs": {
             ....
                "group_by_name": {
                    "terms": {
                        "field": "host.name.keyword"
                    },
                    "aggs": {
                      "group_by_ip": {
                          "terms": {
                              "field": "host.ip.keyword"
                          }, ....
2

Have you seen https://www.elastic.co/guide/en/elasticsearch/reference/7.10/search-aggregations-bucket-terms-aggregation.html#_missing_value_5, it might help?

3

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