output log from popen

src/builder.py

@@ -8,7 +8,6 @@
 
 # Ignore B404:blacklist since all subprocesses are run with predefined executables.
 import subprocess  # nosec
-import sys
 from dataclasses import dataclass
 from pathlib import Path
 
@@ -46,10 +45,9 @@
 GITHUB_RUNNER_IMAGE_BUILDER = UBUNTU_HOME / ".local/bin/github-runner-image-builder"
 OPENSTACK_CLOUDS_YAML_PATH = UBUNTU_HOME / "clouds.yaml"
 OPENSTACK_IMAGE_ID_ENV = "OPENSTACK_IMAGE_ID"
+OUTPUT_LOG_PATH = UBUNTU_HOME / "github-runner-image-builder.log"
 IMAGE_NAME_TMPL = "{IMAGE_BASE}-{APP_NAME}-{ARCH}"
 
-OUTPUT_LOG_PATH = Path("/var/log/github-runner-image-builder.log")
-
 
 @dataclass
 class CallbackConfig:
@@ -288,14 +286,13 @@ def build_immediate(config: CronConfig) -> None:
             f"--cloud-name {config.cloud_name} "
             f"--num-revisions {config.num_revisions} "
             f"--callback-script-path {CALLBACK_SCRIPT_PATH} "
-            f"--output-image-name {output_image_name}"
+            f"--output-image-name {output_image_name} "
+            f">> {OUTPUT_LOG_PATH} 2>&1\n"
         ),
         env={"HOME": str(UBUNTU_HOME)},
         shell=True,
         cwd=UBUNTU_HOME,
         user=UBUNTU_USER,
-        stdout=sys.stdout,
-        stderr=sys.stderr,
     )
     logger.info("Build process started with pid: %s", proc.pid)