reintroduce CONTAINERDEBUG_LOG_DIRECTORY

Author: razvan

rust/operator-binary/src/controller.rs

@@ -850,6 +850,12 @@ fn build_metastore_rolegroup_statefulset(
     container_builder.add_env_vars(vec![
         env_var_from_secret(DB_USERNAME_ENV, &credentials_secret_name, "username"),
         env_var_from_secret(DB_PASSWORD_ENV, &credentials_secret_name, "password"),
+        // Needed for the `containerdebug` process to log it's tracing information to.
+        EnvVar {
+            name: "CONTAINERDEBUG_LOG_DIRECTORY".to_string(),
+            value: Some(format!("{STACKABLE_LOG_DIR}/containerdebug")),
+            value_from: None,
+        },
     ]);
 
     let mut pod_builder = PodBuilder::new();