[PROD-14034] Reduce loki query range to avoid rounding errors

We think that passing the exact max query range to loki can lead to some
rounding error if the values do not align with the current moon phase.
Reducing drastically (from the default 30d1h default value) the query
range should limit this issue.
Anyway, loki should not be used like that from the api, it's better
suited for grafana and we should think going back to archiving logs in
argo workflows directly.

Author: sjoubert

src/main/kotlin/com/cosmotech/api/loki/LokiService.kt

@@ -9,7 +9,9 @@ import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.dataformat.yaml.YAMLFactory
 import com.fasterxml.jackson.module.kotlin.readValue
 import java.time.Instant
+import kotlin.math.min
 import kotlin.time.Duration
+import kotlin.time.Duration.Companion.days
 import org.json.JSONArray
 import org.json.JSONObject
 import org.springframework.http.HttpHeaders
@@ -60,9 +62,10 @@ class LokiService(private val csmPlatformProperties: CsmPlatformProperties) {
     val lokiConfig = getLokiConfig()
     val maxQueryLengthNano =
         Duration.parse(lokiConfig.limitsConfig.maxQueryLength).inWholeNanoseconds
+    val queryLengthNano = min(maxQueryLengthNano, 1.days.inWholeNanoseconds)
 
     val startTimeNano = startTime.toEpochMilli() * MILLI_TO_NANO
-    val endTimeNano = startTimeNano + maxQueryLengthNano
+    val endTimeNano = startTimeNano + queryLengthNano
 
     val params = LinkedMultiValueMap<String, String>()
     params.add("query", "{namespace=\"$namespace\",pod=\"$podName\",container=\"main\"}")
@@ -98,7 +101,7 @@ class LokiService(private val csmPlatformProperties: CsmPlatformProperties) {
       logEntries.lastOrNull()?.let {
         val newStartTime = it.getLong(0) + 1
         params.set("start", newStartTime.toString())
-        params.set("end", (newStartTime + maxQueryLengthNano).toString())
+        params.set("end", (newStartTime + queryLengthNano).toString())
       }
     } while (logEntries.size >= lokiConfig.limitsConfig.maxEntriesLimitPerQuery)