[pbs-devel] [PATCH proxmox-backup v2] log: retrieve `ReaderEnvironment` debug flag from tracing

[Gabriel Goller]

Don't hardcode the debug flag but retrieve the currently enabled level
using tracing. This will change the default log-behavior and disable
some logs that have been printed previously. F.e.: the "protocol upgrade
done" message is not visible anymore per default because it is printed
with debug.

Signed-off-by: Gabriel Goller <g.goller at proxmox.com>
---

Note that this still keeps the behavior of the client controlling the
log-level of the server, except if the server has a minimum log level of
warn.

v2, thanks @Christian:
 - call self.log in self.debug
 - do the same things in ReaderEnvironment

 src/api2/backup/environment.rs | 11 ++++++++---
 src/api2/reader/environment.rs | 11 ++++++++---
 src/server/pull.rs             | 11 +++++++++--
 3 files changed, 25 insertions(+), 8 deletions(-)

diff --git a/src/api2/backup/environment.rs b/src/api2/backup/environment.rs
index 0a7c67b672a3..99d885e2e3c8 100644
--- a/src/api2/backup/environment.rs
+++ b/src/api2/backup/environment.rs
@@ -2,6 +2,7 @@ use anyhow::{bail, format_err, Error};
 use nix::dir::Dir;
 use std::collections::HashMap;
 use std::sync::{Arc, Mutex};
+use tracing::info;
 
 use ::serde::Serialize;
 use serde_json::{json, Value};
@@ -141,7 +142,7 @@ impl BackupEnvironment {
             auth_id,
             worker,
             datastore,
-            debug: false,
+            debug: tracing::enabled!(tracing::Level::DEBUG),
             formatter: JSON_FORMATTER,
             backup_dir,
             last_backup: None,
@@ -687,12 +688,16 @@ impl BackupEnvironment {
     }
 
     pub fn log<S: AsRef<str>>(&self, msg: S) {
-        self.worker.log_message(msg);
+        info!("{}", msg.as_ref());
     }
 
     pub fn debug<S: AsRef<str>>(&self, msg: S) {
         if self.debug {
-            self.worker.log_message(msg);
+            // This is kinda weird, we would like to use tracing::debug! here and automatically
+            // filter it, but self.debug is set from the client-side and the logs are printed on
+            // client and server side. This means that if the client sets the log level to debug,
+            // both server and client need to have 'debug' logs printed.
+            self.log(msg);
         }
     }
 
diff --git a/src/api2/reader/environment.rs b/src/api2/reader/environment.rs
index 602c65e458a3..3b2f06f438fe 100644
--- a/src/api2/reader/environment.rs
+++ b/src/api2/reader/environment.rs
@@ -10,6 +10,7 @@ use pbs_datastore::backup_info::BackupDir;
 use pbs_datastore::DataStore;
 use proxmox_rest_server::formatter::*;
 use proxmox_rest_server::WorkerTask;
+use tracing::info;
 
 /// `RpcEnvironment` implementation for backup reader service
 #[derive(Clone)]
@@ -39,7 +40,7 @@ impl ReaderEnvironment {
             auth_id,
             worker,
             datastore,
-            debug: false,
+            debug: tracing::enabled!(tracing::Level::DEBUG),
             formatter: JSON_FORMATTER,
             backup_dir,
             allowed_chunks: Arc::new(RwLock::new(HashSet::new())),
@@ -47,12 +48,16 @@ impl ReaderEnvironment {
     }
 
     pub fn log<S: AsRef<str>>(&self, msg: S) {
-        self.worker.log_message(msg);
+        info!("{}", msg.as_ref());
     }
 
     pub fn debug<S: AsRef<str>>(&self, msg: S) {
         if self.debug {
-            self.worker.log_message(msg);
+            // This is kinda weird, we would like to use tracing::debug! here and automatically
+            // filter it, but self.debug is set from the client-side and the logs are printed on
+            // client and server side. This means that if the client sets the log level to debug,
+            // both server and client need to have 'debug' logs printed.
+            self.log(msg);
         }
     }
 
diff --git a/src/server/pull.rs b/src/server/pull.rs
index 823515e9ab02..de1bb5d5f6af 100644
--- a/src/server/pull.rs
+++ b/src/server/pull.rs
@@ -278,8 +278,15 @@ impl PullSource for RemoteSource {
         ns: &BackupNamespace,
         dir: &BackupDir,
     ) -> Result<Arc<dyn PullReader>, Error> {
-        let backup_reader =
-            BackupReader::start(&self.client, None, self.repo.store(), ns, dir, true).await?;
+        let backup_reader = BackupReader::start(
+            &self.client,
+            None,
+            self.repo.store(),
+            ns,
+            dir,
+            tracing::enabled!(tracing::Level::DEBUG),
+        )
+        .await?;
         Ok(Arc::new(RemoteReader {
             backup_reader,
             dir: dir.clone(),
-- 
2.39.2