[CI:DOCS] events: document journald identifiers
Document the identifiers used in the journald events backend. Those can
be used to filter Podman events with journalctl and I need them to be
documented for a blog I am writing at the moment.
@@ -135,6 +135,25 @@ Show all events created until the given timestamp
The *since* and *until* values can be RFC3339Nano time stamps or a Go duration string such as 10m, 5h. If no
*since* or *until* values are provided, only new events will be shown.
+## JOURNALD IDENTIFIERS
+
+The journald events-backend of Podman uses the following journald identifiers. You can use the identifiers to filter Podman events directly with `journalctl`.
+
+| **Identifier** | **Description** |
+|-------------------------------|---------------------------------------------------------|
+| SYSLOG_IDENTIFIER | Always set to "podman" |
+| PODMAN_EVENT | The event status as described above |
+| PODMAN_TYPE | The event type as described above |
+| PODMAN_TIME | The time stamp when the event was written |
+| PODMAN_NAME | Name of the event object (e.g., container, image) |
+| PODMAN_ID | ID of the event object (e.g., container, image) |
+| PODMAN_EXIT_CODE | Exit code of the container |
+| PODMAN_POD_ID | Pod ID of the container |
+| PODMAN_LABELS | Labels of the container |
+| PODMAN_HEALTH_STATUS | Health status of the container |
+| PODMAN_CONTAINER_INSPECT_DATA | The JSON payload of `podman-inspect` as described above |
+| PODMAN_NETWORK_NAME | The name of the network |
+
## EXAMPLES
Showing Podman events
