server: add SQLD_MAX_CONCURRENT_CONNECTIONS env var (#1023)

Author: LucioFranco

libsql-server/src/main.rs

@@ -197,7 +197,39 @@ struct Cli {
     #[clap(long)]
     snapshot_at_shutdown: bool,
 
-    #[clap(long, default_value = "128")]
+    /// Max active namespaces kept in-memory
+    #[clap(long, env = "SQLD_MAX_ACTIVE_NAMESPACES", default_value = "100")]
+    max_active_namespaces: usize,
+
+    /// Enable backup for the metadata store
+    #[clap(long)]
+    backup_meta_store: bool,
+    /// S3 access key ID for the meta store backup
+    #[clap(long)]
+    meta_store_access_key_id: Option<String>,
+    /// S3 secret access key for the meta store backup
+    #[clap(long)]
+    meta_store_secret_access_key: Option<String>,
+    /// S3 region for the metastore backup
+    #[clap(long)]
+    meta_store_region: Option<String>,
+    /// Id for the meta store backup
+    #[clap(long)]
+    meta_store_backup_id: Option<String>,
+    /// S3 bucket name for the meta store backup
+    #[clap(long)]
+    meta_store_bucket_name: Option<String>,
+    /// Interval at which to perform backups of the meta store
+    #[clap(long)]
+    meta_store_backup_interval_s: Option<usize>,
+    /// S3 endpoint for the meta store backups
+    #[clap(long)]
+    meta_store_bucket_endpoint: Option<String>,
+    /// encryption_key for encryption at rest
+    #[clap(long, env = "SQLD_ENCRYPTION_KEY")]
+    encryption_key: Option<bytes::Bytes>,
+
+    #[clap(long, default_value = "128", env = "SQLD_MAX_CONCURRENT_CONNECTIONS")]
     max_concurrent_connections: usize,
 }