[pve-devel] [PATCH promxox-mail-forward v2] fix logging by switching to proxmox-log

[Lukas Wagner]

The proxmox-notify crate now uses tracing for logging, hence we have to
set up some tracing logging infrastructure if we want to see any
messages in the journal. Therefore we switch from the syslog crate to
proxmox-log, which configures the appropriate layers/subscribers for
tracing.

Signed-off-by: Lukas Wagner <l.wagner at proxmox.com>
Reviewed-by: Gabriel Goller <g.goller at proxmox.com>
---
Changes since v1:
  - Use :# to print errors with more context

 Cargo.toml     |  5 ++---
 debian/control |  4 ++--
 src/main.rs    | 20 +++++++++++---------
 3 files changed, 15 insertions(+), 14 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 8bbd89e..f23fc61 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,9 +15,8 @@ exclude = [ "debian" ]
 
 [dependencies]
 anyhow = "1.0"
-log = "0.4.17"
 nix = "0.26"
-syslog = "6.0"
 
-proxmox-sys = "0.6"
+proxmox-log = "0.2.8"
 proxmox-notify = {version = "0.5.4", features = ["mail-forwarder", "pve-context", "pbs-context"] }
+proxmox-sys = "0.6"
diff --git a/debian/control b/debian/control
index 48bd241..4ed6308 100644
--- a/debian/control
+++ b/debian/control
@@ -3,15 +3,15 @@ Section: rust
 Priority: optional
 Build-Depends: cargo:native,
                debhelper-compat (= 13),
+               dh-cargo (>= 25),
                librust-anyhow-1+default-dev,
-               librust-log-0.4+default-dev (>= 0.4.17-~~),
                librust-nix-0.26+default-dev,
+               librust-proxmox-log-0.2+default-dev (>= 0.2.8),
                librust-proxmox-notify-0.5+default-dev (>= 0.5.4),
                librust-proxmox-notify-0.5+mail-forwarder-dev,
                librust-proxmox-notify-0.5+pbs-context-dev,
                librust-proxmox-notify-0.5+pve-context-dev,
                librust-proxmox-sys-0.6+default-dev,
-               librust-syslog-6+default-dev,
                libstd-rust-dev,
                patchelf,
                rustc:native,
diff --git a/src/main.rs b/src/main.rs
index 795b0f2..a95d75c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -23,6 +23,9 @@ use std::path::Path;
 
 use anyhow::Error;
 
+use proxmox_log::LevelFilter;
+use proxmox_log::Logger;
+use proxmox_log::error;
 use proxmox_notify::Config;
 use proxmox_notify::context::pbs::PBS_CONTEXT;
 use proxmox_notify::context::pve::PVE_CONTEXT;
@@ -42,7 +45,7 @@ fn attempt_file_read<P: AsRef<Path>>(path: P) -> Option<String> {
     match fs::file_read_optional_string(path.as_ref()) {
         Ok(contents) => contents,
         Err(err) => {
-            log::error!("unable to read {path:?}: {err}", path = path.as_ref());
+            error!("unable to read {path:?}: {err:#}", path = path.as_ref());
             None
         }
     }
@@ -112,11 +115,10 @@ fn forward_for_pbs(mail: &[u8], has_pve: bool) -> Result<(), Error> {
 }
 
 fn main() {
-    if let Err(err) = syslog::init(
-        syslog::Facility::LOG_DAEMON,
-        log::LevelFilter::Info,
-        Some("proxmox-mail-forward"),
-    ) {
+    if let Err(err) = Logger::from_env("PROXMOX_LOG", LevelFilter::INFO)
+        .journald()
+        .init()
+    {
         eprintln!("unable to initialize syslog: {err}");
     }
 
@@ -129,19 +131,19 @@ fn main() {
             if Path::new(PVE_CFG_PATH).exists() {
                 has_pve = true;
                 if let Err(err) = forward_for_pve(&mail) {
-                    log::error!("could not forward mail for Proxmox VE: {err}");
+                    error!("could not forward mail for Proxmox VE: {err:#}");
                 }
             }
 
             // Assume a PBS installation if /etc/proxmox-backup exists
             if Path::new(PBS_CFG_PATH).exists() {
                 if let Err(err) = forward_for_pbs(&mail, has_pve) {
-                    log::error!("could not forward mail for Proxmox Backup Server: {err}");
+                    error!("could not forward mail for Proxmox Backup Server: {err:#}");
                 }
             }
         }
         Err(err) => {
-            log::error!("could not read mail from STDIN: {err}")
+            error!("could not read mail from STDIN: {err:#}")
         }
     }
 }
-- 
2.39.5