server: implement access log rotation with re-open via command socket

re-use the future we already have for task log rotation to trigger
it.

Move the FileLogger in ApiConfig into an Arc, so that we can actually
update it and REST using the new one.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

src/server/config.rs

@@ -2,7 +2,7 @@ use std::collections::HashMap;
 use std::path::PathBuf;
 use std::time::SystemTime;
 use std::fs::metadata;
-use std::sync::{Mutex, RwLock};
+use std::sync::{Arc, Mutex, RwLock};
 
 use anyhow::{bail, Error, format_err};
 use hyper::Method;
@@ -21,7 +21,7 @@ pub struct ApiConfig {
     env_type: RpcEnvironmentType,
     templates: RwLock<Handlebars<'static>>,
     template_files: RwLock<HashMap<String, (SystemTime, PathBuf)>>,
-    request_log: Option<Mutex<FileLogger>>,
+    request_log: Option<Arc<Mutex<FileLogger>>>,
 }
 
 impl ApiConfig {
@@ -124,7 +124,11 @@ impl ApiConfig {
         }
     }
 
-    pub fn enable_file_log<P>(&mut self, path: P) -> Result<(), Error>
+    pub fn enable_file_log<P>(
+        &mut self,
+        path: P,
+        commando_sock: &mut super::CommandoSocket,
+    ) -> Result<(), Error>
     where
         P: Into<PathBuf>
     {
@@ -142,11 +146,19 @@ impl ApiConfig {
             owned_by_backup: true,
             ..Default::default()
         };
-        self.request_log = Some(Mutex::new(FileLogger::new(&path, logger_options)?));
+        let request_log = Arc::new(Mutex::new(FileLogger::new(&path, logger_options)?));
+        self.request_log = Some(Arc::clone(&request_log));
+
+        commando_sock.register_command("api-access-log-reopen".into(), move |_args| {
+            println!("re-opening log file");
+            request_log.lock().unwrap().reopen()?;
+            Ok(serde_json::Value::Null)
+        })?;
 
         Ok(())
     }
-    pub fn get_file_log(&self) -> Option<&Mutex<FileLogger>> {
+
+    pub fn get_file_log(&self) -> Option<&Arc<Mutex<FileLogger>>> {
         self.request_log.as_ref()
     }
 }

src/server/rest.rs

@@ -112,7 +112,7 @@ pub struct ApiService {
 }
 
 fn log_response(
-    logfile: Option<&Mutex<FileLogger>>,
+    logfile: Option<&Arc<Mutex<FileLogger>>>,
     peer: &std::net::SocketAddr,
     method: hyper::Method,
     path_query: &str,