feat(obj): add doc on metrics and logs collected MTA-6463

pages/object-storage/how-to/monitor-consumption.mdx

@@ -46,3 +46,7 @@ To view your Object Storage metrics and logs, use the Grafana dashboard, which i
 <Message type="note">
   Your Object Storage metrics and logs dashboards are also accessible from the console via the **Metrics** and **Logs** tabs of a bucket.
 </Message>
+
+## Collected metrics and logs
+
+Refer to the [dedicated documentation](/object-storage/reference-content/logs-metrics-collection-cockpit/) for more information on metrics and logs collected by Cockpit for Object Storage

pages/object-storage/menu.ts

@@ -197,6 +197,10 @@ export const objectStorageMenu = {
           label: 'Supported checksums',
           slug: 'supported-checksums',
         },
+        {
+          label: 'Logs and metrics collected by Cockpit',
+          slug: 'logs-metrics-collection-cockpit',
+        },
       ],
       label: 'Additional Content',
       slug: 'reference-content',

pages/object-storage/reference-content/logs-metrics-collection-cockpit.mdx

@@ -0,0 +1,46 @@
+---
+title: Logs and metrics collected and sent to Cockpit
+description: This page details what Object Storage data is sent to Cockpit as logs and metrics for monitoring purposes
+tags: data collect monitoring observability cockpit audit data plane
+dates:
+  validation: 2025-09-25
+  posted: 2025-09-25
+---
+
+Scaleway Object Storage automatically sends detailed logs and metrics to [Scaleway Cockpit](/cockpit/) for monitoring, observability, and auditing purposes.
+
+To find out how to consult your Object Storage metrics and logs, refer to the [dedicated documentation](/object-storage/how-to/monitor-consumption/). 
+
+## Metrics collected by Cockpit
+
+Cockpit collects the following metrics for each Object Storage bucket:
+
+| Metric Name                                      | Description                                                                 | Unit   | Refresh Frequency |
+|--------------------------------------------------|-----------------------------------------------------------------------------|--------|-------------------|
+| `object_storage_bucket_objects_total`           | Total number of objects currently stored in the bucket.                     | Objects  | 1 hour         |
+| `object_storage_bucket_usage_bytes_total`       | Total storage space used by all objects in the bucket, in bytes.            | Bytes  | 1 hour         |
+| `object_storage_bucket_parts_total`             | Total number of multipart upload parts present in the bucket.               | Parts  | 1 hour          |
+| `object_storage_bucket_bandwidth_egress_bytes`  | Total number of bytes sent from the bucket to clients (outbound traffic).   | KB/MB per day  | 1 minute          |
+| `object_storage_bucket_bandwidth_ingress_bytes` | Total number of bytes received by the bucket from clients (inbound traffic).| KB/MB per day  | 1 minute          |
+| `object_storage_bucket_http_response_time_seconds_bucket` | Distribution of HTTP response times for bucket operations. | s/ms | 1 minute    |
+| `object_storage_bucket_http_response_time_seconds_count` | Total count of HTTP responses for bucket operations.                  | min/s/ms  | 1 minute          |
+| `object_storage_bucket_http_response_time_seconds_sum`    | Cumulative sum of HTTP response times for bucket operations.          | s/ms  | 1 minute        |
+
+<Message type="note">
+Each metric collected by Cockpit includes a `resource-id` that identifies the specific bucket it originates from.
+</Message>
+
+## Logs collected by Cockpit
+
+Cockpit collects the following logs for each request received by Object Storage buckets:
+
+- `@timestamp`: The exact time when the log entry was recorded.
+- `s3_call`: The specific S3 API operation performed (e.g., GetObject, PutObject).
+- `project_id`: The ProjectID associated with the request.
+- `URI`: The URI path of the HTTP request made to the bucket.
+- `http_method`: The HTTP method used for the request (e.g., GET, PUT, DELETE).
+- `http_status_code`: The HTTP status code returned in response to the request.
+- `http_host`: The value of the HTTP Host header in the request.
+- `bucket`: The name of the bucket targeted by the request.
+- `txid`: The unique transaction ID assigned to the request.
+- `source_ip`: The source IP address from which the request originated.