The Linux "mount" command can run via subprocess.Popen but not via sarge.run

[Shawn Skriver]

I have found an odd behavior while writing a script (Python 2.6.8) that mounts an NFS share to a directory, copies off log files, then un-mounts the directory.

def mount_dir(mnt_path, share_path, mnt_type='nfs', uid=0, gid=0):

    cmd_mkdir = shell_format('/bin/mkdir -p {0}', mnt_path)

    if mnt_type == 'nfs':

        cmd_mount = shell_format("/bin/mount -o rsize=32768,wsize=32768,intr -t {0} {1} {2}", mnt_type, share_path,

                                 mnt_path)

    else:

        cmd_mount = shell_format("/bin/mount -t {0} {1} {2}", mnt_type, share_path, mnt_path)

    run(cmd_mkdir)

    # Apparently sarge's run does not execute mount properly! TODO

    # run(cmd_mount)  # Fail

    # run(cmd_mount, shell=True)  # Fail

    p = subprocess.Popen(cmd_mount, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)

    p.communicate()  # Succeed

    os.chown(mnt_path, uid, gid)

Curiously, I found that I can execute the sarge.run(cmd_mount, shell=True) successfully using iPython (version 1.1.0) in a terminal.

Note that I can un-mount the directory within the script using sarge:

def umount_dir(mnt_path):

    cmd_umount = shell_format('/bin/umount {0}', mnt_path)

    cmd_rmdir = shell_format('/bin/rmdir --ignore-fail-on-non-empty {0}', mnt_path)

    run(cmd_umount)

    run(cmd_rmdir)

Is there a way to use sarge successfully for a mount operation within a script?

Thank You,

Shawn

[Vinay Sajip]

On Friday, March 14, 2014 9:42:11 PM UTC, Shawn Skriver wrote:

I have found an odd behavior while writing a script (Python 2.6.8) that mounts an NFS share to a directory, copies off log files, then un-mounts the directory.

[...] 

Is there a way to use sarge successfully for a mount operation within a script?

 

I will investigate and post a response.

Regards,

Vinay Sajip