Format json output with jq - json

Question

I'm writing a script which will obtain certain info from my Kubernetes cluster.
The following command
kubectl get --context <my-context> svc --selector='<my-selectors>' -o json |
jq -r ' .items[]| {Name:.metadata.name, Port:.spec.ports[0].port} + {Group: "test", Group: "group name", SSLMode: "prefer", MaintenanceDB: "postgres"} '>file.json
will output something like this
{
"Name": "db-name",
"Port": 3000,
"Group": "group name",
"SSLMode": "prefer",
"MaintenanceDB": "postgres"
}
{
"Name": "db-name",
"Port": 5432,
"Group": "group name",
"SSLMode": "prefer",
"MaintenanceDB": "postgres"
}
I've been trying to get the above into the following format
{
"Servers":{
"1": {
"Name": "db-name",
"Port": 3000,
"Group": "Server Group 1",
"SSLMode": "prefer",
"MaintenanceDB": "postgres"
},
"2": {
"Name": "db-name",
"Port": 5432,
"Group": "Server Group 1",
"SSLMode": "prefer",
"MaintenanceDB": "postgres"
}
}
}
Only just discovered jq so the few things I've tried have been unsuccessful. Would be grateful for any pointers.

Answer 1

Given the stream of JSON objects shown in the question, the following jq filter will produce the desired output assuming the stream is somehow "slurped":
. as $in
| reduce range(0;length) as $i ({};.[$i+1|tostring] = $in[$i])
| {Servers: .}
To avoid having to call jq twice, you could wrap your filter in square brackets, and pipe that into the above; better yet, you can streamline everything, e.g. along the following lines:
.items
| [to_entries[]
| {(.key+1|tostring): .value}
| map_values(
{Name:.metadata.name,
Port:.spec.ports[0].port,
Group: "group name",
SSLMode: "prefer",
MaintenanceDB: "postgres"}) ]
| {Servers: add}