feat(validator-node): add logging (#4189)

Description
---
Adds log4rs to validator node

Motivation and Context
---
Currently, no logs are produced fr the validator node

How Has This Been Tested?
---
Manually

applications/tari_validator_node/log4rs_sample.yml

@@ -0,0 +1,188 @@
+# A sample log configuration file for running in release mode. By default, this configuration splits up log messages to
+# three destinations:
+#    * Console: For log messages with level INFO and higher
+#    * log/validator-node/network.log: INFO-level logs related to the comms crate. This file will be quite busy since there
+#      are lots of P2P debug messages, and so this traffic is segregated from the application log messages
+#    * log/validator-node/base_layer.log: Non-comms related INFO-level messages and higher are logged into this file
+#    * log/validator-node/other.log: Third-party crates' messages will be logged here at an ERROR level
+#
+#  See https://docs.rs/log4rs/0.8.3/log4rs/encode/pattern/index.html for deciphering the log pattern. The log format
+#  used in this sample configuration prints messages as:
+#  timestamp [target] LEVEL message
+refresh_rate: 30 seconds
+appenders:
+  # An appender named "stdout" that writes to stdout
+  stdout:
+    kind: console
+
+    encoder:
+      pattern: "{d(%H:%M)} {h({l}):5} {m}{n}"
+    filters:
+      - kind: threshold
+        level: warn
+
+  # An appender named "network" that writes to a file with a custom pattern encoder
+  network:
+    kind: rolling_file
+    path: "log/validator-node/network.log"
+    policy:
+      kind: compound
+      trigger:
+        kind: size
+        limit: 10mb
+      roller:
+        kind: fixed_window
+        base: 1
+        count: 5
+        pattern: "log/validator-node/network.{}.log"
+    encoder:
+      pattern: "{d(%Y-%m-%d %H:%M:%S.%f)} [{t}] [Thread:{I}] {l:5} {m}{n} // {f}:{L}"
+
+  # An appender named "base_layer" that writes to a file with a custom pattern encoder
+  base_layer:
+    kind: rolling_file
+    path: "log/validator-node/base_layer.log"
+    policy:
+      kind: compound
+      trigger:
+        kind: size
+        limit: 10mb
+      roller:
+        kind: fixed_window
+        base: 1
+        count: 5
+        pattern: "log/validator-node/base_layer.{}.log"
+    encoder:
+      pattern: "{d(%Y-%m-%d %H:%M:%S.%f)} [{t}] [{X(node-public-key)},{X(node-id)}] {l:5} {m}{n} // {f}:{L} "
+
+  # An appender named "base_layer" that writes to a file with a custom pattern encoder
+  dan_layer:
+    kind: rolling_file
+    path: "log/validator-node/dan_layer.log"
+    policy:
+      kind: compound
+      trigger:
+        kind: size
+        limit: 10mb
+      roller:
+        kind: fixed_window
+        base: 1
+        count: 5
+        pattern: "log/validator-node/dan_layer.{}.log"
+    encoder:
+      pattern: "{d(%Y-%m-%d %H:%M:%S.%f)} [{t}] [{X(node-public-key)},{X(node-id)}] {l:5} {m}{n} // {f}:{L} "
+
+
+  # An appender named "other" that writes to a file with a custom pattern encoder
+  other:
+    kind: rolling_file
+    path: "log/validator-node/other.log"
+    policy:
+      kind: compound
+      trigger:
+        kind: size
+        limit: 10mb
+      roller:
+        kind: fixed_window
+        base: 1
+        count: 5
+        pattern: "log/validator-node/other.{}.log"
+    encoder:
+      pattern: "{d(%Y-%m-%d %H:%M:%S.%f)} [{t}] [Thread:{I}] {l:5} {m}{n} // {f}:{L} "
+
+# Set the default logging level to "info"
+root:
+  level: warn
+  appenders:
+    - stdout
+
+loggers:
+  # Route log events common to every application to all appenders
+
+  tari::application:
+    level: info
+    appenders:
+      - base_layer
+      - network
+      - other
+    additive: false
+
+  tari::validator_node:
+    level: info
+    appenders:
+      - dan_layer
+      - base_layer
+      - network
+      - other
+    additive: false
+
+  tari::dan_layer:
+    level: info
+    appenders:
+      - dan_layer
+    additive: false
+
+  # Route log events sent to the "core" logger to the "base_layer" appender
+  c:
+    level: info
+    appenders:
+      - base_layer
+  tari:
+    level: info
+    appenders:
+      - base_layer
+
+  # Route log events sent to the "wallet" logger to the "base_layer" appender
+  wallet:
+    level: info
+    appenders:
+      - base_layer
+  # Route log events sent to the "comms" logger to the "network" appender
+  comms:
+    level: debug
+    appenders:
+      - network
+  # Route log events sent to the "p2p" logger to the "network" appender
+  p2p:
+    level: debug
+    appenders:
+      - network
+
+    # Route log events sent to the "yamux" logger to the "network" appender
+  yamux:
+    level: info
+    appenders:
+      - network
+  # Route log events sent to the "mio" logger to the "network" appender
+  mio:
+    level: error
+    appenders:
+      - network
+  # Route log events sent to the "rustyline" logger to the "other" appender
+  rustyline:
+    level: error
+    appenders:
+      - other
+    additive: false
+
+  # Route log events sent to the "tokio_util" logger to the "other" appender
+  tokio_util:
+    level: error
+    appenders:
+      - other
+  # Route PGP log events
+  pgp:
+    level: warn
+    appenders:
+      - other
+  # Route log events sent to the "tari_mm_proxy" logger to the "base_layer" appender
+  tari_mm_proxy:
+    level: info
+    appenders:
+      - base_layer
+  # Route R2D2 log events
+  r2d2:
+    level: warn
+    appenders:
+      - other
+    additive: false

applications/tari_validator_node/src/dan_node.rs

@@ -64,7 +64,7 @@ impl DanNode {
                         .await
                     {
                         Ok(()) => info!("Contracts accepted"),
-                        Err(e) => error!("Contracts not accepted becayse {:?}", e),
+                        Err(e) => error!("Contracts not accepted because {:?}", e),
                     }
 
                     time::sleep(Duration::from_secs(

applications/tari_validator_node/src/main.rs

@@ -41,6 +41,7 @@ use tari_app_grpc::tari_rpc::validator_node_server::ValidatorNodeServer;
 use tari_app_utilities::identity_management::setup_node_identity;
 use tari_common::{
     exit_codes::{ExitCode, ExitError},
+    initialize_logging,
     load_configuration,
 };
 use tari_comms::{
@@ -90,7 +91,10 @@ fn main_inner() -> Result<(), ExitError> {
     println!("Starting validator node on network {}", cli.network);
     let config_path = cli.common.config_path();
     let cfg = load_configuration(config_path, true, &cli.config_property_overrides())?;
-
+    initialize_logging(
+        &cli.common.log_config_path("validator"),
+        include_str!("../log4rs_sample.yml"),
+    )?;
     let config = ApplicationConfig::load_from(&cfg)?;
     let runtime = build_runtime()?;
     runtime.block_on(run_node(&config))?;