Python subprocess.communicate 无法从运行c 容器捕获输出，如果不是来自交互式终端的运行

Question

我有一个脚本，它运行是一个子进程并捕获输出，但只有当我运行它在交互式 shell 中它才有效，但如果运行来自詹金斯。

tst_subscriber = ["timeout", "-s", "KILL", str(timeout),"bash","-c", subsciber_executable]
tst_publisher = ["timeout","-s", "KILL", str(timeout),"bash","-c", publisher_executable]
kill_publisher = lambda process: subprocess.call(['docker-runc', 'delete', pub_name, "-f"])
kill_subscriber = lambda process: subprocess.call(['docker-runc', 'delete', sub_name, "-f"])

test_env = os.environ.copy()
# workaround for buffering problem which causes no captured output for python subprocesses
test_env["PYTHONUNBUFFERED"] = "1"

sub_pro = Popen(tst_subscriber, stdout=subprocess.PIPE, env=test_env)
pub_pro = Popen(tst_publisher, stdout=subprocess.PIPE, env=test_env)

timeout_sub = Timer(timeout, kill_subscriber, [sub_pro])
timeout_pub = Timer(timeout, kill_publisher, [pub_pro])

timeout_sub.start()
timeout_pub.start()
(output, err) = sub_pro.communicate()

print "Subscriber stdout:"
print output
print "Subscriber stderr:"
print err

Answer 1

由于几个开放的 runc 问题 #1965 #1721，在 config.json 中设置 terminal: true 会导致管道困难。看到 terminal: false 解决了问题。

Python subprocess.communicate 无法从 运行c 容器捕获输出，如果不是来自交互式终端的 运行

Python subprocess.communicate fails to capture output from runc container if not run from interactive terminal

python

subprocess

runc

Python subprocess.communicate 无法从运行c 容器捕获输出，如果不是来自交互式终端的运行