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How To Upgrade Perl 5.8 to 5.10 of cPanel

Discussion in 'General Discussion' started by andisugandi, Jun 1, 2012.

  1. andisugandi

    andisugandi Member

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    Hi all,

    I want to install Perl module (Modern::Perl), but it requires Perl at least in version 5.10.

    This is when I ran the install command on cpan:
    Code:
    cpan[2]> install Modern:Perl
Running install for module 'Modern::Perl'
Running make for C/CH/CHROMATIC/Modern-Perl-1.20120521.tar.gz
Checksum for /root/.cpan/sources/authors/id/C/CH/CHROMATIC/Modern-Perl-1.20120521.tar.gz ok
Scanning cache /root/.cpan/build for sizes
............................................................................DONE

CPAN.pm: Building C/CH/CHROMATIC/Modern-Perl-1.20120521.tar.gz

Checking prerequisites...
requires:
! feature is not installed
! mro is not installed
! perl (5.8.8) is installed, but we need version >= 5.010

ERRORS/WARNINGS FOUND IN PREREQUISITES. You may wish to install the versions
of the modules indicated above before proceeding with this installation

Created MYMETA.yml and MYMETA.json
Creating new 'Build' script for 'Modern-Perl' version '1.20120521'
CHROMATIC/Modern-Perl-1.20120521.tar.gz requires perl '5.010'; you have only 5.008008; giving up
CHROMATIC/Modern-Perl-1.20120521.tar.gz
[prereq] -- NOT OK

Running Build test
Can't test without successful make
Running Build install
Make had returned bad status, install seems impossible
Failed during this command:
CHROMATIC/Modern-Perl-1.20120521.tar.gz : make NO requires perl '5.010'

    I have read this document:
    Installing Internal Perl Modules

    But, no idea about $Title , how to upgrade installed Perl 5.8 (by cPanel) to 5.10 or newer?

    Thanks in advance.
     
    #1 andisugandi, Jun 1, 2012
  2. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    Hello,

    Are you on CentOS 6 or RHEL 6? If you are, you could always simply try reverting to the rpm-installed perl versions. First check they are there:

    Code:
    rpm -qa | grep -i perl
    You should see perl-5.10.1 listed as one of them.

    Next, run the following to check if we moved the /usr/bin/perl binary:

    Code:
    whereis perl
    On my system, I see the following:

    Code:
    root@host [~]# whereis perl
perl: /usr/bin/perl /usr/bin/perl.1336150642 /usr/local/bin/perl /usr/share/man/man1/perl.1.gz
    Now, when I run perl -v on my server, I see Perl 5.8.8 because we moved /usr/bin/perl to /usr/bin/perl.1336150642 and symlinked /usr/bin/perl to /usr/local/bin/perl

    When I run perl -v on /usr/bin/perl.1336150642, I see this:

    Code:
    root@host [~]# /usr/bin/perl.1336150642 -v | grep "This is perl"
This is perl, v5.10.1 (*) built for x86_64-linux-thread-multi
    As such, rather than upgrading to Perl 5.10.1, I already have it. Now, I cannot state if you should really be moving that installation to /usr/local/bin/perl so we pull it. cPanel should technically now work with versions higher than Perl 5.8.8, but I would definitely suggest if you try updating to that higher version to first make a backup of /usr/local/bin/perl binary so that you have that available if anything goes wrong.

    If you do revert to the other binary, you'll probably want to run "/usr/local/cpanel/scripts/checkperlmodules --full --force" to update any perl modules.

    Thanks!
     
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    #2 cPanelTristan, Jun 1, 2012
  3. andisugandi

    andisugandi Member

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    Yes, it is Centos 6.2 (x86_64)

    My RPM binary Perl already has v. 5.10:

    The Perl(s) in my sistem:
    So, what should I do to get /usr/bin/perl.1323845669 and /usr/local/bin/perl have the v. 5.10?

    Is it by running:

    and

    ?

    Thanks in advance.
     
    #3 andisugandi, Jun 1, 2012
  4. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    Hello,

    I don't see a backup being made of /usr/local/bin/perl prior to doing anything there as was suggested to avoid causing major issues if the upgrade fails?

    Code:
    cp /usr/local/bin/perl /usr/local/bin/perl.bak
    Any other steps will need to be decided by you as I will be unable to suggest them. I've provided details on how to find an installed copy. If this fails to work, you could cause perl to not function and cPanel to not function. These are decisions that should not be taken lightly.

    Thanks!
     
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    #4 cPanelTristan, Jun 1, 2012
  5. andisugandi

    andisugandi Member

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    Yes, I already make a backup of /usr/local/bin/perl file before running those two commands.

    I also afraid something will go wrong in cPanel. What other step(s) i should do to avoid problems in the future?

    Thanks.
     
    #5 andisugandi, Jun 1, 2012
  6. andisugandi

    andisugandi Member

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    As expected, now I can not run cpan (/usr/local/bin/cpan):
    Code:
    # cpan
Can't locate App/Cpan.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at /usr/local/bin/cpan line 8.
BEGIN failed--compilation aborted at /usr/local/bin/cpan line 8.
    Though I am still able to run /usr/bin/cpan (own by perl-CPAN-1.9402-119.el6_1.1.x86_64 Centos RPM package).

    Is it good to replace /usr/local/bin/cpan by /usr/bin/cpan ?

    Is it not going to face another problem and my application is able to make use of this Perl modules installed by newer cpan?

    Thanks.
     
    #6 andisugandi, Jun 1, 2012
  7. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    Did you run "/scripts/checkperlmodules --full --force" as was suggested in my first post after symlinking /usr/bin/perl to /usr/local/bin/perl and replacing /usr/local/bin/perl with the Perl 5.10.1 binary?

    If you did and this is still happening, I suggest reverting it and using the path to the other binary in your script and trying to install modules via source into the location of the alternate perl if possible.
     
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    #7 cPanelTristan, Jun 1, 2012
  8. andisugandi

    andisugandi Member

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    Hi,

    In case I was doing wrong;

    Do you mean "Perl 5.10.1 binary" is /usr/bin/perl file that is part of perl-5.10.1-119.el6_1.1.x86_64 (RPM) package (originally owned by Centos itself)?
    Code:
    # rpm -qf /usr/bin/perl
perl-5.10.1-119.el6_1.1.x86_64
    Thanks for helpful advice.
     
    #8 andisugandi, Jun 1, 2012
    Last edited: Jun 1, 2012
  9. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    You can run "/usr/bin/perl -v" to see the Perl version of that binary. If that shows Perl 5.10.1, then that's the binary you wanted. If it isn't, then the backed up copy (/usr/bin/perl.1323845669) is the version as I noted previously.
     
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    #9 cPanelTristan, Jun 4, 2012
  10. minosjl

    minosjl Well-Known Member

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    Hi,

    I can see that your Perl version is already 5.10 but you are failed to install the Modern:Perl through cpan. So in that case I would suggest you to download the "Modern-Perl-1.20120521.tar.gz" from "search.cpan.org" and uncompress the file and compile it manually by following the below steps and check what happens.

    perl Makefile.PL
    make
    make test
    make install

    Thy to give the full path of Perl binary while making
     
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    #10 minosjl, Jun 4, 2012
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