bin: run additional validation for --dry-run

src/fluent-bit.c

@@ -1436,10 +1436,17 @@ static int flb_main_run(int argc, char **argv)
 #endif
 
     if (config->dry_run == FLB_TRUE) {
-        fprintf(stderr, "configuration test is successful\n");
+        ret = flb_reload_property_check_all(config);
+
+        /* At this point config test is done, so clean up after ourselves */
         flb_init_env();
         flb_cf_destroy(cf_opts);
         flb_destroy(ctx);
+
+        if (ret != 0) {
+            exit(EXIT_FAILURE);
+        }
+        fprintf(stderr, "configuration test is successful\n");
         exit(EXIT_SUCCESS);
     }
 

tests/runtime_shell/dry_run_invalid_property.sh

@@ -0,0 +1,64 @@
+#!/bin/sh
+
+# Setup environment if not already set
+if [ -z "$FLB_BIN" ]; then
+    FLB_ROOT=${FLB_ROOT:-$(cd $(dirname $0)/../.. && pwd)}
+    FLB_BIN=${FLB_BIN:-$FLB_ROOT/build/bin/fluent-bit}
+fi
+
+echo "Using Fluent Bit at: $FLB_BIN"
+
+# Create a temporary YAML config file with an invalid property
+cat > /tmp/dry_run_invalid_property.yaml << EOL
+service:
+  log_level: debug
+  flush: 1
+pipeline:
+  inputs:
+    - name: dummy
+      tag: test
+      invalid_property_that_does_not_exist: some_value
+  outputs:
+    - name: stdout
+      match: '*'
+EOL
+
+echo "Running Fluent Bit with --dry-run and invalid property config..."
+echo "YAML Config:"
+cat /tmp/dry_run_invalid_property.yaml
+
+# Redirect stdout and stderr to a file for analysis
+OUTPUT_FILE="/tmp/dry_run_invalid_property_output.txt"
+$FLB_BIN --dry-run -c /tmp/dry_run_invalid_property.yaml > $OUTPUT_FILE 2>&1
+
+# Check exit code - we expect it to fail
+EXIT_CODE=$?
+echo "Fluent Bit --dry-run exited with code: $EXIT_CODE"
+
+# Show the output
+echo "Output file content:"
+cat $OUTPUT_FILE
+
+# Check if the output contains an error about the unknown configuration property
+UNKNOWN_PROPERTY=$(grep -c "unknown configuration property 'invalid_property_that_does_not_exist'" $OUTPUT_FILE || true)
+RELOAD_ERROR=$(grep -c "check properties for input plugins is failed" $OUTPUT_FILE || true)
+
+# Clean up
+echo "Cleaning up..."
+rm -f /tmp/dry_run_invalid_property.yaml
+rm -f $OUTPUT_FILE
+
+# Check results - we expect:
+# 1. Fluent Bit to fail (non-zero exit code)
+# 2. Error message about unknown configuration property
+# 3. Error message from reload validation
+if [ "$EXIT_CODE" -ne 0 ] && [ "$UNKNOWN_PROPERTY" -gt 0 ] && [ "$RELOAD_ERROR" -gt 0 ]; then
+    echo "Test passed: Fluent Bit --dry-run correctly detected invalid property and failed"
+    exit 0
+else
+    echo "Test failed: Fluent Bit --dry-run should detect invalid properties and fail"
+    echo "Exit code: $EXIT_CODE (expected non-zero)"
+    echo "Unknown property message count: $UNKNOWN_PROPERTY (expected > 0)"
+    echo "Reload error message count: $RELOAD_ERROR (expected > 0)"
+    exit 1
+fi