ansible/community.general
1
0
Fork 0
mirror of https://github.com/ansible-collections/community.general.git synced 2024-09-14 20:13:21 +02:00
Code Releases Activity

Lock around SSH connectivity to new hosts in host checking mode such that prompts for host approval

Browse source 
messages do not get interlaced.
This commit is contained in:
Michael DeHaan 2013-07-04 16:03:17 -04:00
parent cb26945d54
commit 1683d44d2e
1 changed files with 32 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

32
lib/ansible/runner/connection_plugins/ssh.py
View file

@ -93,6 +93,22 @@ class Connection(object):
os.write(self.wfd, "%s\n" % self.password)
os.close(self.wfd)
def not_in_host_file(self, host):
host_file = os.path.expanduser("~/.ssh/known_hosts")
if not os.path.exists(host_file):
print "previous known host file not found"
return True
host_fh = open(host_file)
data = host_fh.read()
host_fh.close()
for line in data.split("\n"):
if line is None or line.find(" ") == -1:
continue
tokens = line.split()
if host in tokens[0]:
return False
return True
def exec_command(self, cmd, tmp_path, sudo_user,sudoable=False, executable='/bin/sh'):
''' run a command on the remote host '''
@ -109,6 +125,16 @@ class Connection(object):
ssh_cmd.append(sudocmd)
vvv("EXEC %s" % ssh_cmd, host=self.host)
not_in_host_file = self.not_in_host_file(self.host)
if C.HOST_KEY_CHECKING and not_in_host_file:
# lock around the initial SSH connectivity so the user prompt about whether to add
# the host to known hosts is not intermingled with multiprocess output.
KEY_LOCK = self.runner.lockfile
fcntl.lockf(KEY_LOCK, fcntl.LOCK_EX)
try:
# Make sure stdin is a proper (pseudo) pty to avoid: tcgetattr errors
import pty
@ -162,6 +188,12 @@ class Connection(object):
break
stdin.close() # close stdin after we read from stdout (see also issue #848)
if C.HOST_KEY_CHECKING and not_in_host_file:
# lock around the initial SSH connectivity so the user prompt about whether to add
# the host to known hosts is not intermingled with multiprocess output.
KEY_LOCK = self.runner.lockfile
fcntl.lockf(KEY_LOCK, fcntl.LOCK_EX)
if p.returncode != 0 and stderr.find('Bad configuration option: ControlPersist') != -1:
raise errors.AnsibleError('using -c ssh on certain older ssh versions may not support ControlPersist, set ANSIBLE_SSH_ARGS="" (or ansible_ssh_args in the config file) before running again')