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.
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