On Tue, Oct 16, 2018 at 5:15 PM tina_zy_qian--- via Python-list
<python-list@python.org> wrote:
>
> I newly learned Python, and I need to wrap up a script to do following.
>
> Env:
> 1: One launcher Linux VM (from where to run the Python script)
> 2. 100+ Linux VM
>
> requirement:
> In general, run a remote_script on remote 100 VMs and get the log files
> generated to remote hosts back to launcher.
>
> steps
> 1. cp (pexpect.spawn('scp ')) supporting files including the remote_script
> to remotehost:/remote_folder
> 2. run remote_script on remote host ( pexpect.spawn('ssh %s@%s "%s"' %
> (user,host,cmd))
> 3. wait and check until the remote_script was run on remote host. (to check
> "ps -ef" result on remote hosts)
> 4. collect data from remote hosts -- reverse to step 1.
>
>
> I briefly implemented other steps expect step 3. Two options are below.
>
> option 1: run another script "ps -ef|grep remote_script and output result to
> a local file, then collected the files to launcher.
>
> option 2: run pexect.spawn('ssh' ....'ps -e') to get the result directly to
> laucher console.
> But how I can get only the output for "ps -ef" command only?
>
> I must use the (users, passwords, and hosts) way to do ssh and scp because I
> may not be allowed to use ssh key on some hosts. Any suggestions or sample
> code for step 3 or the whole script are appreciated. Thanks.
This looks amazingly similar to a pre interview programming assignment
was given once.
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