chore: support set log file when running test harness

docs/harness.toml

@@ -1,7 +1,7 @@
 bind_addr = "0.0.0.0"
 http_port = 5440
 grpc_port = 8831
-log_level = "info"
+log_level = "debug"
 enable_cluster = true
 
 [query]

tests/Makefile

@@ -8,6 +8,8 @@ export CERESDB_CONFIG_PATH ?= $(ROOT)/../docs/harness.toml
 export CERESDB_SERVER_ENDPOINT ?= 127.0.0.1:8831
 export CERESDB_TEST_CASE_PATH ?= $(ROOT)/cases
 export CERESDB_TEST_HARNESS ?= $(ROOT)/../target/$(MODE)/ceresdb-test
+export CERESDB_STDOUT_FILE ?= /tmp/ceresdb-stdout.log
+export CERESDB_STDERR_FILE ?= /tmp/ceresdb-stderr.log
 
 clean:
 	rm -rf $(DATA_DIR)

tests/harness/src/setup.rs

@@ -2,7 +2,8 @@
 
 use std::{
     env,
-    process::{Child, Command, Stdio},
+    fs::File,
+    process::{Child, Command},
 };
 
 use ceresdb_client_rs::{client::Client, Builder};
@@ -11,6 +12,8 @@ const BINARY_PATH_ENV: &str = "CERESDB_BINARY_PATH";
 const CONFIG_PATH_ENV: &str = "CERESDB_CONFIG_PATH";
 const SERVER_ENDPOINT_ENV: &str = "CERESDB_SERVER_ENDPOINT";
 const CASE_ROOT_PATH_ENV: &str = "CERESDB_TEST_CASE_PATH";
+const CERESDB_STDOUT_FILE: &str = "CERESDB_STDOUT_FILE";
+const CERESDB_STDERR_FILE: &str = "CERESDB_STDERR_FILE";
 
 pub struct Environment {
     server_process: Child,
@@ -20,12 +23,15 @@ impl Environment {
     pub fn start_server() -> Self {
         let bin = env::var(BINARY_PATH_ENV).expect("Cannot parse binary path env");
         let config = env::var(CONFIG_PATH_ENV).expect("Cannot parse config path env");
+        let stdout = env::var(CERESDB_STDOUT_FILE).expect("Cannot parse stdout env");
+        let stderr = env::var(CERESDB_STDERR_FILE).expect("Cannot parse stderr env");
 
-        // TODO: support config stdout/stderr
+        let stdout = File::create(stdout).expect("Cannot create stdout");
+        let stderr = File::create(stderr).expect("Cannot create stderr");
         let server_process = Command::new(&bin)
             .args(["--config", &config])
-            .stdout(Stdio::null())
-            .stderr(Stdio::null())
+            .stdout(stdout)
+            .stderr(stderr)
             .spawn()
             .unwrap_or_else(|_| panic!("Failed to start server at {:?}", bin));
         println!("Server from {:?} is starting ...", bin);