[PATCH] [Kimchi 1/1] Fix issue #1170: ERROR:KCHVM0090E: Unable to create a password-less libvirt connection to the remote libvirt daemon
by Fu.Lin
Long ago, I submitted an issue:
https://github.com/kimchi-project/kimchi/issues/1170 ...
Test by following script:
import subprocess
import os
import time
def _check_remote_libvirt_conn(remote_host,
user='root', transport='ssh'):
FNULL = open(os.devnull, 'w')
dest_uri = 'qemu+%s://%s@%s/system' % (transport, user,
remote_host)
cmd = ['virsh', '-c', dest_uri, 'list']
proc = subprocess.Popen(cmd, stdout=FNULL, stderr=FNULL,
shell=True, preexec_fn=os.setsid)
timeout = 0
while proc.poll() is None:
time.sleep(1)
timeout += 1
if timeout == 5:
print("killed")
os.killpg(os.getpgid(proc.pid), signal.SIGTERM)
if __name__ == '__main__':
_check_remote_libvirt_conn('localhost')
`proc` is timeout every time although the connection is normal tested by
`virsh -c <uri>` list
The following is the reason of changing(From Python Document 2.7.14):
Do not use stdout=PIPE or stderr=PIPE with this function as that can
deadlock based on the child process output volume. Use Popen with the
communicate() method when you need pipes.
Using shell=True can be a security hazard. See the warning under
Frequently Used Arguments for details.
At the same time, if not change, it does not work.
diff --git a/model/vms.py b/model/vms.py
index 6da4f3b..92e771f 100644
--- a/model/vms.py
+++ b/model/vms.py
@@ -1885,10 +1885,11 @@ class VMModel(object):
def _check_remote_libvirt_conn(self, remote_host,
user='root', transport='ssh'):
+ FNULL = open(os.devnull, 'w')
dest_uri = 'qemu+%s://%s@%s/system' % (transport, user,
remote_host)
cmd = ['virsh', '-c', dest_uri, 'list']
- proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
- shell=True, preexec_fn=os.setsid)
+ proc = subprocess.Popen(cmd, stdout=FNULL, stderr=FNULL,
+ shell=False, preexec_fn=os.setsid)
timeout = 0
while proc.poll() is None:
time.sleep(1)
--
Regards
River (Fu.Lin)
7 years, 1 month
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