chore: use Box::leak() to ensure logging guard lives for the program's lifetime

src/meta/binaries/meta/entry.rs

@@ -71,7 +71,8 @@ pub async fn entry(conf: Config) -> anyhow::Result<()> {
         "cluster_name".to_string(),
         conf.raft_config.cluster_name.clone(),
     );
-    let _guards = init_logging(&app_name_shuffle, &conf.log, log_labels);
+    let guards = init_logging(&app_name_shuffle, &conf.log, log_labels);
+    Box::new(guards).leak();
 
     info!("Databend Meta version: {}", METASRV_COMMIT_VERSION.as_str());
     info!(

src/meta/binaries/metactl/main.rs

@@ -375,7 +375,8 @@ async fn main() -> anyhow::Result<()> {
         },
         ..Default::default()
     };
-    let _guards = init_logging("metactl", &log_config, BTreeMap::new());
+    let guards = init_logging("metactl", &log_config, BTreeMap::new());
+    Box::new(guards).leak();
 
     match app.command {
         Some(ref cmd) => match cmd {

src/meta/binaries/metaverifier/main.rs

@@ -94,7 +94,8 @@ async fn main() -> Result<()> {
         ..Default::default()
     };
 
-    let _guards = init_logging("databend-metaverifier", &log_config, BTreeMap::new());
+    let guards = init_logging("databend-metaverifier", &log_config, BTreeMap::new());
+    Box::new(guards).leak();
 
     println!("config: {:?}", config);
     if config.grpc_api_address.is_empty() {

src/meta/process/src/examples.rs

@@ -61,11 +61,12 @@ impl Default for RaftConfig {
 async fn upgrade_09() -> anyhow::Result<()> {
     let config = Config::parse();
 
-    let _guards = init_logging(
+    let guards = init_logging(
         "databend-meta-upgrade-09",
         &LogConfig::default(),
         BTreeMap::new(),
     );
+    Box::new(guards).leak();
 
     eprintln!("config: {}", pretty(&config)?);