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Hi
i am planning to use this module, but its version is 0.11 ! and author says it is beta quality. i am using Net::OpenSSH which is also below ver 1.0 but i have had no issues with it so far.
does anyone have any good/bad experience with this module?
thank you.
Rajeev
--0-1579457088-1315697707=:81547--
On Sat, Sep 10, 2011 at 04:35:07PM -0700, Rajeev Prasad wrote:
> Hi
>
> i am planning to use this module, but its version is 0.11 ! and author says it is beta quality. i am using Net::OpenSSH which is also below ver 1.0 but i have had no issues with it so far.
>
> does anyone have any good/bad experience with this module?
I don't, but I think you are probbaly reading far too much into both the
version number and its described status. 0.11 may well mean that the module
has had 11 releases. Would you consider that good or bad? It depends, I
suppose.
And beta quality? That *should* mean that the author believes the module is
complete, functional and working apart from any already noted bugs, and it is
now ready for further testing in real world situations by real users. That
seems to be pretty good quality to me.
The trouble is that too many companies have sold software, often for large
sums of money, and that software is full of bugs or lacking in functionality.
Is it any wonder that people then worry about the quality of beta or alpha
software?
See http://pjcj.sytes.net/notes/2007/03/14#alpha for more of my thoughts on
this subject with specific reference to one of my modules, which has now had
79 releases over 10 years and is thus up to version 0.79.
It's possible that the module is complete rubbish. Or it may be practically
perfect in every way. But you're not going to find out from the version
number or described status. Asking for opinions is a much better strategy,
but ultimately you'll need to try it for yourself and see if it does what you
want.
--
Paul Johnson - paul@pjcj.net
http://www.pjcj.net
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On Sun, 11 Sep 2011 02:32:58 +0200
Paul Johnson
> On Sat, Sep 10, 2011 at 04:35:07PM -0700, Rajeev Prasad wrote:
>=20
> > Hi
> >=20
> > i am planning to use this module, but its version is 0.11 ! and author =
says it is beta quality. i am using Net::OpenSSH which is also below ver 1=
..0 but i have had no issues with it so far.
> >=20
> > does anyone have any good/bad experience with this module?
>=20
> I don't, but I think you are probbaly reading far too much into both the
> version number and its described status. 0.11 may well mean that the mod=
ule
> has had 11 releases. Would you consider that good or bad? It depends, I
> suppose.
>=20
> And beta quality? That *should* mean that the author believes the module=
is
> complete, functional and working apart from any already noted bugs, and i=
t is
> now ready for further testing in real world situations by real users. Th=
at
> seems to be pretty good quality to me.
Indeed. As Eric Raymond notes in:
http://www.catb.org/~esr/writings/cathedral-bazaar/homestead ing/ar01s13.html
<<<
This rule underlies the fact that open-source software tends to stay in bet=
a for a long time, and not get even a 1.0 version number until the develope=
rs are very sure it will not hand out a lot of nasty surprises. In the clos=
ed-source world, Version 1.0 means ``Don't touch this if you're prudent.'';=
in the open-source world it reads something more like ``The developers are=
willing to bet their reputations on this.''.
>>>
Also there's some discussion of Padre reaching version 1.0 here:
http://mailman.jach.hawaii.edu/pipermail/perldl/2010-April/0 02930.html
And I should note that most of my original modules on
http://search.cpan.org/~shlomif/ are below 1.0 (possibly the only exception=
is HTML-Widgets-NavMenu, where I bumped the middle version digit too liber=
ally and had to release 1.0), and yet they should be usable.
On the fun side see this IRC conversation:
<<<<<<<<<<<<<<<<<<<
eventually hit 0.8.0 and had to go to 1.000) all my 1.0 and
above modules are adopted.
then not to release 1.0
-- d3x and Shlomi Fish (rindolf) about FOSS Versioning
-- private conversation, Freenode
>>>>>>>>>>>>>>>>>>>
(from
http://www.shlomifish.org/humour/fortunes/show.cgi?id=3Dd3x- and-shlomif-abo=
ut-foss-versioning ).
Regards,
Shlomi Fish
--=20
------------------------------------------------------------ -----
Shlomi Fish http://www.shlomifish.org/
Escape from GNU Autohell - http://www.shlomifish.org/open-source/anti/autoh=
ell/
To err is human; to apologise â=94 divine.
Please reply to list if it's a mailing list post - http://shlom.in/reply .
--
To unsubscribe, e-mail: beginners-unsubscribe@perl.org
For additional commands, e-mail: beginners-help@perl.org
http://learn.perl.org/
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thx guys, i was not aware of this version'ing view in open source.
=0A=
=0Aso i am now trying to use this module now. but i guess i have a very bas=
ic issue:
currently i am running following in a loop for all hosts (an=
d a inner loop for all commands for a host):
   my ($M=
FSSH) =3D Net::OpenSSH->new($HOST,
  Â=A0    =
            =
   user =3D> $USER,
  Â=A0   =C2=
=A0 Â Â Â Â Â Â Â Â Â Â Â =
    password =3D> $PASS,
  Â=A0  =
           =C2=
 Â=A0    default_stderr_fh =3D> $stderr_fh,
Â=
 Â=A0          =
         default_stdout_fh =
=3D> $stdout_fh,
  Â=A0       =
           =C2=
=A0 master_opts =3D> [-o =3D> 'StrictHostKeyChecking=3Dno',
 Â=A0=
           =C2=
Â=A0 Â Â Â Â Â Â Â Â Â Â =
           =C2=
=A0-o =3D> 'ConnectTimeout 10'],
  Â=A0    =
            =
   );
  Â=A0 $EXITCODE =3D $MFSSH->error;=0A=
   next if ($EXITCODE ne "0");    =C2=
Â=A0 Â Â Â #go to next host if ssh fails
 Â=A0=
 foreach $CMD (@MFCMDS){
  Â=A0 chomp($CMD);
Â=A0=
  ( @CMDRESULT, $CMDERR ) =3D $MFSSH->capture("$CMD");
Â=A0=
  }
how can i use Net::OpenSSH::Parallel this script?=
i mean i understood creating a new instance like pssh in the module CPAN p=
age, but not sure how to integrate it with the script i already have.
=
thx in advance.=0ARajeev
_______________________________ _=0AFrom=
: Shlomi Fish
=0ACc: Rajeev Prasad
et::OpenSSH::Parallel in your experience
On Sun, 11 Sep 2011 02:32:58=
+0200=0APaul Johnson
04:35:07PM -0700, Rajeev Prasad wrote:=0A> =0A> > Hi=0A> > =0A> > i am pla=
nning to use this module, but its version is 0.11 ! and author says it is b=
eta quality. i am using Net::OpenSSH which is also below ver 1.0 but =
i have had no issues with it so far.=0A> > =0A> > does anyone have any good=
/bad experience with this module?=0A> =0A> I don't, but I think you are pro=
bbaly reading far too much into both the=0A> version number and its describ=
ed status. 0.11 may well mean that the module=0A> has had 11 releases=
.. Would you consider that good or bad? It depends, I=0A> suppos=
e.=0A> =0A> And beta quality? That *should* mean that the author beli=
eves the module is=0A> complete, functional and working apart from any alre=
ady noted bugs, and it is=0A> now ready for further testing in real world s=
ituations by real users. That=0A> seems to be pretty good quality to =
me.
Indeed. As Eric Raymond notes in:
http://www.catb.org/~esr/wr=
itings/cathedral-bazaar/homesteading/ar01s13.html
<<<=0AThis rule unde=
rlies the fact that open-source software tends to stay in beta for a long t=
ime, and not get even a 1.0 version number until the developers are very su=
re it will not hand out a lot of nasty surprises. In the closed-source worl=
d, Version 1.0 means ``Don't touch this if you're prudent.''; in the open-s=
ource world it reads something more like ``The developers are willing to be=
t their reputations on this.''.=0A>>>
Also there's some discussion of =
Padre reaching version 1.0 here:
http://mailman.jach.hawaii.edu/piperm=
ail/perldl/2010-April/002930.html
And I should note that most of my or=
iginal modules on=0Ahttp://search.cpan.org/~shlomif/ are below 1.0 (possibl=
y the only exception is HTML-Widgets-NavMenu, where I bumped the middle ver=
sion digit too liberally and had to release 1.0), and yet they should be us=
able.
On the fun side see this IRC conversation:
<<<<<<<<<<<<<<<<=
<<<
Â=A0 Â
le file.mp3
Â=A0 Â
=A0 This -dumpfile is a nice trick.=0A
=0A
Â=A0 Â
ir goal=0A
=A0
ing=0A
is at 0.999924.=0A
Â
rom 0.99.=0A
 perl-Moose is MDV/RH notation, but I like it.
Â=A0 Â
 imo it's just stupid not to release 1.0=0A
libmoose-perl=0A
so and now they have normal versioning=0A
CPAN modules are sub-1.0.=0A
/=0A
and
Â=A0 Â Â Â Â Â eventually hit 0.8.0 and h=
ad to go to 1.000) all my 1.0 and
Â=A0 Â Â Â Â =C2=
=A0 above modules are adopted.
Â=A0 Â
0, but they are not 0.9.999.2010.03.11-rc5
Â=A0 Â
=0A
ote you on that?
Â=A0 Â
eases up to 0.9.something and
Â=A0 Â Â Â Â Â t=
hen not to release 1.0=0A
Â=A0 Â
I have freecell-solver-2.42.0=0A
will be 3.0.0
Â=A0 Â
ell enterprise? :D=0A
=0A
â=A2 Inc.=0A
99.2010.03.11-rc5-adc83b19e793491b1c6ea0fd8b46cd9f32e592fc=0 AÂ Â =
=A0 Â -- d3x and Shlomi Fish (rindolf) about FOSS Versioning
Â=A0 =
 -- private conversation, Freenode=0A>>>>>>>>>>>>>>>>>>>
(from=
=0Ahttp://www.shlomifish.org/humour/fortunes/show.cgi?id=3Dd 3x-and-shlomif-=
about-foss-versioning ).
Regards,
   Shlomi Fish=
=0A-- =0A--------------------------------------------------------- ---=
-----=0AShlomi Fish   http://www.shlomifish.org/=0AEscape=
from GNU Autohell - http://www.shlomifish.org/open-source/anti/autohell/=
To err is human; to apologise â=94 divine.
Please reply to =
list if it's a mailing list post - http://shlom.in/reply .
--=0ATo uns=
ubscribe, e-mail: beginners-unsubscribe@perl.org=0AFor additional commands,=
e-mail: beginners-help@perl.org=0Ahttp://learn.perl.org/
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trying to use this module now. but i guess i have a very basic issue:=
=0Acurrently i am running following in a loop for all hosts (and a in=
ner loop for all commands for a host):
=A0 my ($MFSSH) =3D Net::=
OpenSSH->new($HOST,
=A0 =A0 =A0 =A0 =A0=
=A0 user =3D> $USER,
=A0 =A0 =A0=
=A0 =A0 =A0 password =3D> $PASS,
=A0 =
=A0 =A0 =A0 =A0 =A0 default_stderr_fh =3D> $s=
tderr_fh,
=A0 =A0 =A0 =A0 =A0 =A0=
default_stdout_fh =3D> $stdout_fh,
=A0 =A0 =
=A0 =A0 =A0 =A0 master_opts =3D> [-o =3D> 'StrictHo=
stKeyChecking=3Dno',
=A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0-o=
=3D> 'ConnectTimeout 10'],
=A0 =A0 =A0 =A0=
=A0 =A0 );
$EXITCODE =3D $MFSSH->error;=0A=
=A0 next if ($EXITCODE ne "0"); =A0 =A0 =A0 #go to n=
ext host if ssh fails
foreach $CMD (@MFCMDS){
chomp=
($CMD);
( @CMDRESULT, $CMDERR ) =3D $MFSSH->capture("$CMD");=0A=
=A0 }
how can i use Net::OpenSSH::Parallel this script? i =
mean i understood creating a new instance like pssh in the module CPAN page=
, but not sure how to integrate it with the script i already have.
thx=
in advance.=0ARajeev=0A
--239630641-1870636879-1316037448=:48427--
On Sep 14, 11:57=A0pm, rp.ne...@yahoo.com (Rajeev Prasad) wrote:
> trying to use this module now. but i guess i have a very basic issue:
>
> currently i am running following in a loop for all hosts (and a inner loo=
p for all commands for a host):
>
> =A0 my ($MFSSH) =3D Net::OpenSSH->new($HOST,
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 use=
r =3D> $USER,
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 pas=
sword =3D> $PASS,
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 def=
ault_stderr_fh =3D> $stderr_fh,
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 def=
ault_stdout_fh =3D> $stdout_fh,
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 mas=
ter_opts =3D> [-o =3D> 'StrictHostKeyChecking=3Dno',
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=
=A0 =A0 =A0 =A0 =A0-o =3D> 'ConnectTimeout 1=
0'],
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 );
> =A0 $EXITCODE =3D $MFSSH->error;
> =A0 next if ($EXITCODE ne "0"); =A0 =A0 =A0 #go to=
next host if ssh fails
> =A0 foreach $CMD (@MFCMDS){
> =A0 chomp($CMD);
> =A0 ( @CMDRESULT, $CMDERR ) =3D $MFSSH->capture("$CMD");
> =A0 }
>
> how can i use Net::OpenSSH::Parallel this script? i mean i understood cre=
ating a new instance like pssh in the module CPAN page, but not sure how to=
integrate it with the script i already have.
Net::OpenSSH::Parallel does not allow capturing directly the output of
commands into perl scalars. You have to redirect it to some file and
then reread it.
It would be easier to help you if you tells us what you need to do
from a higher level.
--
To unsubscribe, e-mail: beginners-unsubscribe@perl.org
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On Sep 14, 11:57=A0pm, rp.ne...@yahoo.com (Rajeev Prasad) wrote:=0A> trying=
to use this module now. but i guess i have a very basic issue:=0A>=0A> cur=
rently i am running following in a loop for all hosts (and a inner loop for=
all commands for a host):=0A>=0A> =A0 my ($MFSSH) =3D Net::OpenSSH->=
new($HOST,=0A> =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 user =3D> $USER,=0A> =A0 =A0 =A0 =A0 =A0=
=A0 =A0 password =3D> $PASS,=0A> =A0 =A0 =A0=
=A0 =A0 =A0 =A0 default_stderr_fh =3D> $stde=
rr_fh,=0A> =A0 =A0 =A0 =A0 =A0 =A0 =A0=
default_stdout_fh =3D> $stdout_fh,=0A> =A0 =A0 =A0=
=A0 =A0 =A0 =A0 master_opts =3D> [-o =3D> 'StrictH=
ostKeyChecking=3Dno',=0A> =A0 =A0 =A0 =A0 =A0=
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0-=
o =3D> 'ConnectTimeout 10'],=0A> =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 );=0A> =A0 $EXITCODE =3D $MFSSH->error;=
=0A> =A0 next if ($EXITCODE ne "0"); =A0 =A0 =A0 #go=
to next host if ssh fails=0A> =A0 foreach $CMD (@MFCMDS){=0A> =
=A0 chomp($CMD);=0A> =A0 ( @CMDRESULT, $CMDERR ) =3D $MFSSH->capture(=
"$CMD");=0A> =A0 }=0A>=0A> how can i use Net::OpenSSH::Parallel this =
script? i mean i understood creating a new instance like pssh in the module=
CPAN page, but not sure how to integrate it with the script i already have=
..
Net::OpenSSH::Parallel does not allow capturing directly the output =
of=0Acommands into perl scalars. You have to redirect it to some file and=
=0Athen reread it.
It would be easier to help you if you tells us what=
you need to do=0Afrom a higher level.
-------------------------------=
-----
=0AHi Salva,=0AThx for responding. I need to SSH into several no=
des and run some commands there and capture the modified output to a file o=
n local node from where the script is run.
=0A-rgds,=0ARajeev
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On Sep 17, 2011 12:16 PM, "Rajeev Prasad"
>
> On Sep 14, 11:57 pm, rp.ne...@yahoo.com (Rajeev Prasad) wrote:
> > trying to use this module now. but i guess i have a very basic issue:
> >
> > currently i am running following in a loop for all hosts (and a inner
loop for all commands for a host):
> >
> > my ($MFSSH) = Net::OpenSSH->new($HOST,
> > user => $USER,
> > password => $PASS,
> > default_stderr_fh => $stderr_fh,
> > default_stdout_fh => $stdout_fh,
> > master_opts => [-o =>
'StrictHostKeyChecking=no',
> > -o => 'ConnectTimeout
10'],
> > );
> > $EXITCODE = $MFSSH->error;
> > next if ($EXITCODE ne "0"); #go to next host if ssh fails
> > foreach $CMD (@MFCMDS){
> > chomp($CMD);
> > ( @CMDRESULT, $CMDERR ) = $MFSSH->capture("$CMD");
> > }
> >
> > how can i use Net::OpenSSH::Parallel this script? i mean i understood
creating a new instance like pssh in the module CPAN page, but not sure how
to integrate it with the script i already have.
>
> Net::OpenSSH::Parallel does not allow capturing directly the output of
> commands into perl scalars. You have to redirect it to some file and
> then reread it.
>
> It would be easier to help you if you tells us what you need to do
> from a higher level.
>
> ------------------------------------
>
> Hi Salva,
> Thx for responding. I need to SSH into several nodes and run some commands
there and capture the modified output to a file on local node from where the
script is run.
>
That's not saying what you want to do. That's saying what you think the
script should do in order to achieve a goal.
Now, I've never used that module but there's probably an anyevent module for
doing what you want. It might also be possible to use ipc::run objects which
might get you clover to what you want.
--00151744102ec2b6ab04ad2658b9--
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hi shawn/omega/salva,
=0Ai think there is some communication gap. so t=
o address my issue differently. can you guys plz. paste an example of code =
where you are usign this parallel module to ssh into many systems and, run =
some commands there (say you can use ls -l for your example) and change tha=
t output a bit=A0then, store the output in a file.
=0Ai think that exa=
mple will speak a thousand words and will take care of shortcomings in comm=
unication.
=0Ai did seacrh the net for examples on this module: i foun=
d none.
=0Athx.
From: shawn wilson
Cc: "beginners@perl.org"
7, 2011 12:21 PM=0ASubject: Re: how to use Net::OpenSSH::Parallel
On S=
ep 17, 2011 12:16 PM, "Rajeev Prasad"
n Sep 14, 11:57 pm, rp.ne...@yahoo.com (Rajeev Prasad) wrote:=0A> > trying =
to use this module now. but i guess i have a very basic issue:=0A> >=0A> > =
currently i am running following in a loop for all hosts (and a inner=0Aloo=
p for all commands for a host):=0A> >=0A> >=A0 =A0 my ($MFSSH) =3D Net::Op=
enSSH->new($HOST,=0A> >=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 user =3D> $USER,=0A> >=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 password =3D> $PASS,=0A> >=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 default_stderr_fh =3D> $stderr_fh,=0A> >=A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 default_stdout_fh =3D> $stdout_fh,=
=0A> >=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 master_opts =
=3D> [-o =3D>=0A'StrictHostKeyChecking=3Dno',=0A> >=A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=
-o =3D> 'ConnectTimeout=0A10'],=0A> >=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 );=0A> >=A0 =A0 $EXITCODE =3D $MFSSH->error;=0A> >=A0=
=A0 next if ($EXITCODE ne "0");=A0 =A0 =A0 =A0 =A0 =A0 #go to next host i=
f ssh fails=0A> >=A0 =A0 foreach $CMD (@MFCMDS){=0A> >=A0 =A0 chomp($CMD)=
;=0A> >=A0 =A0 ( @CMDRESULT, $CMDERR ) =3D $MFSSH->capture("$CMD");=0A> >=
=A0 =A0 }=0A> >=0A> > how can i use Net::OpenSSH::Parallel this script? i =
mean i understood=0Acreating a new instance like pssh in the module CPAN pa=
ge, but not sure how=0Ato integrate it with the script i already have.=0A>=
=0A> Net::OpenSSH::Parallel does not allow capturing directly the output of=
=0A> commands into perl scalars. You have to redirect it to some file and=
=0A> then reread it.=0A>=0A> It would be easier to help you if you tells us=
what you need to do=0A> from a higher level.=0A>=0A> ---------------------=
---------------=0A>=0A> Hi Salva,=0A> Thx for responding. I need to SSH int=
o several nodes and run some commands=0Athere and capture the modified outp=
ut to a file on local node from where the=0Ascript is run.=0A>
That's =
not saying what you want to do. That's saying what you think the=0Ascript s=
hould do in order to achieve a goal.
Now, I've never used that module =
but there's probably an anyevent module for=0Adoing what you want. It might=
also be possible to use ipc::run objects which=0Amight get you clover to w=
hat you want.
---1654579934-1503743141-1316359225=:84700--
On Sat, Sep 17, 2011 at 6:15 PM, Rajeev Prasad
> Hi Salva,
> Thx for responding. I need to SSH into several nodes and run some commands
> there and capture the modified output to a file on local node from where the
> script is run.
The easiest way to do that with Net::OpenSSH::Parallel is to retrieve
the unmodified output of the commands you are running to local files
and then postprocess them.
$pssh->push('*', cmd => {stdout_file => '/tmp/out-%HOST%'}, $cmd);
$pssh->run;
for my $host (@hosts) {
open my $fh, '<', "/tmp/out-$host" or die "$!";
while (<$fh>) {
...
}
}
You can also use an external program to process the output on the fly:
$pssh->push('*', cmd => {stdout_file => ['|-', 'grep foo
>/tmp/out-%HOST%']}, $cmd);
Or you can use the 'parsub' action to handle the output in perl
yourself (though, in a different process):
open my $out, '>', $filename or die $!;
sub worker {
my ($label, $ssh) = @_;
my $data = $ssh->capture($cmd);
my $processed_data = process($data);
flock($out, LOCK_EX);
print $out $processed_data;
flock($out, LOCK_UN);
}
$pssh->push("*", parsub => \&worker);
$pssh->run;
What you can't do with Net::OpenSSH::Parallel is to process the output
of the remote commands in the same process on the fly or to plug the
output of some command run in some host to the input of another
process running in a different host. If you want to do that, you
should go with some of the Perl event-based frameworks (AnyEvent, POE)
or use threads.
In my experience, the first approach I have described (using
intermediate temporal files) is usually the right one.
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