chore: docs + labels for collector

src/vector/README.md

@@ -37,4 +37,6 @@ As with any decisions of tooling in core this can always be reevaluated in the f
 
 ### Upgrade Considerations
 
-During the upgrade there may be some duplication/overlap of log lines shipped to Loki due to the transition from Promtail's "position" file to Vector's "checkpoint" file (both used for tracking the last log line scraped/shipped). Grafana provides a built in feature to de-duplicate log entries when querying Loki.
+During the upgrade there may be some duplication/overlap of log lines shipped to Loki due to the transition from Promtail's "position" file to Vector's "checkpoint" file (both used for tracking the last log line scraped/shipped). Grafana provides a built in feature to de-duplicate log entries when querying Loki, but this does not consistently work with all log lines due to the approach used for de-duplication.
+
+To ensure easy querying of logs across the upgrade, all logs shipped by Vector also have a `collector` label (with the value of `vector`). This can be used to filter down any logs to either what was collected by Vector or what was not collected by Vector (using the `=` and `!=` operators). In general you can use these filters to filter so that any log timestamps from before your upgrade are not collected by Vector and vice-verse post-upgrade.

src/vector/values/values.yaml

@@ -67,7 +67,8 @@ customConfig:
         container: '{{`{{ kubernetes.container_name }}`}}'
         component: '{{`{{ kubernetes.pod_labels.component }}`}}'
         host: '{{`{{ kubernetes.pod_node_name }}`}}'
-        file: '{{`{{ file }}`}}'
+        filename: '{{`{{ file }}`}}'
+        collector: "vector"
       buffer:
         type: disk
         max_size: 1073741824 # 1GiB
@@ -81,7 +82,8 @@ customConfig:
       labels:
         job: '{{`{{ job }}`}}'
         host: '{{`{{ node_name }}`}}'
-        file: '{{`{{ file }}`}}'
+        filename: '{{`{{ file }}`}}'
+        collector: "vector"
       buffer:
         type: disk
         max_size: 1073741824 # 1GiB