fix(stanza/converter): handle syslogrecevier attributes correctly (op…

…en-telemetry#27415)

**Description:**

Syslog receiver produces attribute (`structured_data`) which is a
stringified map. This PR fixes it. See Issue for more details

**Link to tracking Issue:**
open-telemetry#27414

**Testing:**

UT

**Documentation:**

In code comments

---------

Signed-off-by: Dominik Rosiek <[email protected]>

.chloggen/drosiek-syslog-receiver-attributes.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: syslogparser
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: return correct structure from syslog parser
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [27414]
+
+# (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:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [user]

pkg/stanza/operator/input/syslog/syslog_test.go

@@ -49,8 +49,8 @@ var (
  "msg_id": "ID52020",
  "priority": 86,
  "proc_id": "23108",
- "structured_data": map[string]map[string]string{
- "SecureAuth@27389": {
+ "structured_data": map[string]interface{}{
+ "SecureAuth@27389": map[string]interface{}{
  "PEN": "27389",
  "Realm": "SecureAuth0",
  "UserHostAddress": "192.168.2.132",

pkg/stanza/operator/parser/syslog/data.go

@@ -159,8 +159,8 @@ func CreateCases(basicConfig func() *Config) ([]Case, error) {
  "msg_id": "ID52020",
  "priority": 86,
  "proc_id": "23108",
- "structured_data": map[string]map[string]string{
- "SecureAuth@27389": {
+ "structured_data": map[string]interface{}{
+ "SecureAuth@27389": map[string]interface{}{
  "PEN": "27389",
  "Realm": "SecureAuth0",
  "UserHostAddress": "192.168.2.132",
@@ -197,8 +197,8 @@ func CreateCases(basicConfig func() *Config) ([]Case, error) {
  "msg_id": "ID52020",
  "priority": 86,
  "proc_id": "23108",
- "structured_data": map[string]map[string]string{
- "SecureAuth@27389": {
+ "structured_data": map[string]interface{}{
+ "SecureAuth@27389": map[string]interface{}{
  "PEN": "27389",
  "Realm": "SecureAuth0",
  "UserHostAddress": "192.168.2.132",
@@ -235,8 +235,8 @@ func CreateCases(basicConfig func() *Config) ([]Case, error) {
  "msg_id": "ID52020",
  "priority": 86,
  "proc_id": "23108",
- "structured_data": map[string]map[string]string{
- "SecureAuth@27389": {
+ "structured_data": map[string]interface{}{
+ "SecureAuth@27389": map[string]interface{}{
  "PEN": "27389",
  "Realm": "SecureAuth0",
  "UserHostAddress": "192.168.2.132",

pkg/stanza/operator/parser/syslog/syslog.go

@@ -243,7 +243,7 @@ func (s *Parser) toSafeMap(message map[string]interface{}) (map[string]interface
  delete(message, key)
  continue
  }
- message[key] = *v
+ message[key] = convertMap(*v)
  default:
  return nil, fmt.Errorf("key %s has unknown field of type %T", key, v)
  }
@@ -252,6 +252,22 @@ func (s *Parser) toSafeMap(message map[string]interface{}) (map[string]interface
  return message, nil
 }
 
+// convertMap converts map[string]map[string]string to map[string]interface{}
+// which is expected by stanza converter
+func convertMap(data map[string]map[string]string) map[string]interface{} {
+ ret := map[string]interface{}{}
+ for key, value := range data {
+ ret[key] = map[string]interface{}{}
+ r := ret[key].(map[string]interface{})
+
+ for k, v := range value {
+ r[k] = v
+ }
+ }
+
+ return ret
+}
+
 func toBytes(value interface{}) ([]byte, error) {
  switch v := value.(type) {
  case string: