feat: Added an env variable to set source as 'sc4s' (#2581)

* feat: Added a env variable to provide provision of hardcoding source to 'sc4s' * docs: Updated documentation with the details of the newly introduced variable.
splunk · Sep 24, 2024 · 76c980c · 76c980c
1 parent 207fc13
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diff --git a/docs/configuration.md b/docs/configuration.md
@@ -277,6 +277,16 @@ A syntax error will cause the runtime process to abort in the "preflight" phase
 
 To update your changes, restart SC4S.
 
+### Set source value as 'sc4s'
+
+User can set the source field value to 'sc4s' by using the `SC4S_SET_SOURCE_AS_SC4S` variable.
+
+**Note:** If the source field value is specified in a local parser or the splunk_metadata.csv file, it will take precedence over the `SC4S_SET_SOURCE_AS_SC4S` variable and overwrite the source field value.
+
+| Variable | Values        | Description |
+|----------|---------------|-------------|
+| SC4S_SET_SOURCE_AS_SC4S | yes or no(default) | Set the source field value to 'sc4s'. |
+
 ## Drop all data by IP or subnet (deprecated)
 
 Using `vendor_product_by_source` to null queue is now a deprecated task. See the supported method for dropping data in [Filtering events from output](https://splunk.github.io/splunk-connect-for-syslog/main/sources/#filtering-events-from-output).

diff --git a/package/etc/conf.d/sources/source_syslog/plugin.jinja b/package/etc/conf.d/sources/source_syslog/plugin.jinja
@@ -288,6 +288,11 @@ source s_{{ port_id }} {
             };
         };
 
+        {%- if set_source_sc4s == True %}
+            rewrite {
+                set("sc4s", value(".splunk.source"));
+            };
+        {%- endif %}
 
         rewrite {
             set($FACILITY, value("fields.sc4s_syslog_facility") condition(match('facility' template('`SC4S_DEST_SPLUNK_INDEXED_FIELDS`') type(string) flags(substring))));
@@ -475,6 +480,12 @@ source s_{{ port_id }} {
             parser(app-group-sc4s-fallback);
         };
 
+        {%- if set_source_sc4s == True %}
+            rewrite {
+                set("sc4s", value(".splunk.source"));
+            };
+        {%- endif %}
+
         rewrite {
             set($FACILITY, value("fields.sc4s_syslog_facility") condition(match('facility' template('`SC4S_DEST_SPLUNK_INDEXED_FIELDS`') type(string) flags(substring))));
             set($LEVEL, value("fields.sc4s_syslog_severity") condition(match('severity' template('`SC4S_DEST_SPLUNK_INDEXED_FIELDS`') type(string) flags(substring)) ));

diff --git a/package/etc/conf.d/sources/source_syslog/plugin.py b/package/etc/conf.d/sources/source_syslog/plugin.py
@@ -133,5 +133,6 @@ def normalize_env_variable_input(env_variable: str):
         ebpf_no_sockets=int(os.getenv("SC4S_EBPF_NO_SOCKETS", 4)),
         enable_parallelize=normalize_env_variable_input(f"SC4S_ENABLE_PARALLELIZE"),
         parallelize_no_partitions=int(os.getenv(f"SC4S_PARALLELIZE_NO_PARTITION", 4)),
+        set_source_sc4s=normalize_env_variable_input("SC4S_SET_SOURCE_AS_SC4S"),
     )
     print(outputText)