add combineWith to multiline options

.chloggen/recombine_with_field.yaml

@@ -0,0 +1,12 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+# The name of the component, or a single word describing the area of concern, (e.g. agent, clusterReceiver, gateway, networkExplorer, operator, chart, other)
+component: agent
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Add combineWith field to multiline configuration
+# One or more tracking issues related to the change
+issues: [756]
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:

docs/advanced-configuration.md

@@ -474,6 +474,7 @@ logsCollection:
         containerName:
           value: server
         firstEntryRegex: ^[^\s].*
+        combineWith: ""
 ```
 
 Use https://regex101.com/ to find a golang regex that works for your format and specify it in the config file for the config option `firstEntryRegex`.

helm-charts/splunk-otel-collector/templates/config/_otel-agent.tpl

@@ -409,6 +409,7 @@ receivers:
         combine_field: attributes.log
         is_first_entry: '(attributes.log) matches {{ .firstEntryRegex | quote }}'
         max_log_size: {{ $.Values.logsCollection.containers.maxRecombineLogSize }}
+        combine_with: {{ .combineWith | default "\n" | quote }}
       {{- end }}
       {{- end }}
       # Clean up log record

helm-charts/splunk-otel-collector/values.yaml

@@ -587,6 +587,7 @@ logsCollection:
     #     containerName:
     #       value: server
     #     firstEntryRegex: ^[^\s].*
+    #     combineWith: ""
     multilineConfigs: []
     # Set useSplunkIncludeAnnotation flag to `true` to collect logs from pods with `splunk.com/include: true` annotation and ignore others.
     # All other logs will be ignored.