Description of problem:

The "thanos-querier" somehow rewrites the "cluster"-field with the name of the Openshift-cluster, as opposed to when doing the exact same query but on the "prometheus" API endpoint

Version-Release number of selected component (if applicable):

4.9

How reproducible:

Customer is able to reproduce at will.

Steps to Reproduce:

Thanos-querier API endpoint :
$ curl --noproxy "*" -sLk --data-urlencode "query=opensearch_cluster_nodes_number" -H "Authorization: Bearer xxxx" "https://thanos-querier-openshift-monitoring.apps.smals-75.paas.acc.cloud.smals.be/api/v1/query" | jq-win64.exe
...
{
"status": "success",
"data": {
"resultType": "vector",
"result": [
{
"metric": {
"_name_": "opensearch_cluster_nodes_number",
"cluster": "smals-75",
"container": "opensearch",
"endpoint": "http",
...

Prometheus API endpoint :
$ curl --noproxy "*" -sLk --data-urlencode "query=opensearch_cluster_nodes_number" -H "Authorization: Bearer xxxx" "https://prometheus-k8s-openshift-monitoring.apps.smals-75.paas.acc.cloud.smals.be/api/v1/query" | jq-win64.exe
...
{
"status": "success",
"data": {
"resultType": "vector",
"result": [
{
"metric": {
"_name_": "opensearch_cluster_nodes_number",
"cluster": "opensearch-test",
"container": "opensearch",
"endpoint": "http",

Actual results:

Expected results:

Additional info: