Paramiko channel hangs

When sending a command via ssh using paramiko, the script would hang. eg:

def ssh_connect(self):
    """ connects to the remote server using paramiko """
    ssh = paramiko.SSHClient()
    ssh.connect(self.hostname, self.remoteport, self.remoteuser, None, None, self.keypath)
    return ssh

def ssh_command(self, command):
    """ executes long command on remote server """
    ssh = self.ssh_connect()
    channel = ssh.invoke_shell()
    stdin = channel.makefile('wb')
    stdout = channel.makefile('rb')
    ssh_out =
    stdout.close(); stdin.close(); ssh.close()
    return ssh_out

command = """
    tar -zxvf {rp} || echo 'deploy-copy-untar-error {rp}'
    rm {rp} || echo 'deploy-copy-delete-error {rp}'
    echo 'deploy-copy-success {rp}'
    """.format(rp = remotepath)
ssh_out = self.ssh_command(command)

You need to add ‘exit’ to the end of the command so the channel quits and the script continues. Like so:
command = “””
tar -zxvf {rp} || echo ‘deploy-copy-untar-error {rp}’
rm {rp} || echo ‘deploy-copy-delete-error {rp}’
echo ‘deploy-copy-success {rp}’
“””.format(rp = remotepath)
sshout = self.sshcommand(command)

Leave a Reply

Your email address will not be published. Required fields are marked *