HI! I continue blogging about sparrowdo - a simple perl6 configuration management tool.

This is what we've learned so far:

• Sparrowdo automation. Part 1. Installing cpan packages

• Sparrowdo automation. Part 2. Dealing with http proxy servers

Installing packages

Consider out latest example with installing CPAN packages:

$ cat sparrowfile

use v6;

use Sparrowdo;


task_run  %(
  task => 'install CGI',
  plugin => 'cpan-package',
  parameters => %( list => 'CGI' ),
);

What we are trying to do here is to install CGI CPAN module using cpan-package plugin. Here is little trick is hidden. A cpan-package implies you have a cpanm client pre-installed at your system. Let's see what will happen if it is not:

$ sparrowdo --ssh_port=2200 --host=127.0.0.1 --ssh_user=vagrant 
running sparrow tasks on 127.0.0.1 ... 
running task <install-CGI> plg <cpan-package> 
parameters: {list => CGI}
/opt/sparrow/tmp/8417/opt/sparrow/plugins/public/cpan-package/story.t .. 
# [/opt/sparrow/plugins/public/cpan-package/modules/cpanm]
# install CGI ...
# /opt/sparrow/plugins/public/cpan-package/modules/cpanm/story.bash: line 22: cpanm: command not found
not ok 1 - scenario succeeded

#   Failed test 'scenario succeeded'
#   at /usr/local/share/perl/5.20.2/Outthentic.pm line 193.
not ok 2 - output match 'install ok'
# [/opt/sparrow/plugins/public/cpan-package]
# cpan-package-done
ok 3 - output match 'cpan-package-done'
1..3

#   Failed test 'output match 'install ok''
#   at /usr/local/share/perl/5.20.2/Outthentic.pm line 239.
# Looks like you failed 2 tests of 3.
Dubious, test returned 2 (wstat 512, 0x200)
Failed 2/3 subtests 

Test Summary Report
-------------------
/opt/sparrow/tmp/8417/opt/sparrow/plugins/public/cpan-package/story.t (Wstat: 512 Tests: 3 Failed: 2)
  Failed tests:  1-2
  Non-zero exit status: 2
Files=1, Tests=3,  0 wallclock secs ( 0.02 usr  0.00 sys +  0.10 cusr  0.00 csys =  0.12 CPU)
Result: FAIL
The spawned process exited unsuccessfully (exit code: 1)
  in block <unit> at /home/melezhik/.rakudobrew/moar-nom/install/share/perl6/site/resources/CDEEEB90951FEDF24FB0EE4EFB79E7A6061B289C line 3

Upps, obviously we see the reason of the failure here:

cpanm: command not found

So, we need to install cpanm client to our system first to make it working cpan-package plugin. One day I probably add this dependency into cpan-package itself , but for now we could use a package-generic plugin to install any system packages.

Luckily we have cpanminus ubuntu package to install cpanm client on our ubuntu box:

$ cat sparrowfile

use v6;

use Sparrowdo;

task_run  %(
  task => 'install cpanm client',
  plugin => 'package-generic',
  parameters => %( list => 'cpanminus' )
);

task_run  %(
  task => 'install CGI',
  plugin => 'cpan-package',
  parameters => %( 
    list => 'CGI',
  ),
);

Let's give it a run ...

$ sparrowdo --ssh_port=2200 --host=127.0.0.1 --ssh_user=vagrant
running sparrow tasks on 127.0.0.1 ...
running task <install cpanm client> plg <package-generic>
parameters: {list => cpanminus}
/opt/sparrow/tmp/8792/opt/sparrow/plugins/public/package-generic/story.t ..
# [/opt/sparrow/plugins/public/package-generic/modules/apt-get]
# trying to install cpanminus ...
# installer - apt-get
# Package: cpanminus
# Version: 1.7014-1
# Status: install ok installed
ok 1 - output match 'Status: install ok installed'
# [/opt/sparrow/plugins/public/package-generic]
# package-generic-done
ok 2 - output match 'package-generic-done'
1..2
ok
All tests successful.
Files=1, Tests=2,  2 wallclock secs ( 0.02 usr  0.00 sys +  0.67 cusr  0.20 csys =  0.89 CPU)
Result: PASS
running task <install-CGI> plg <cpan-package>
parameters: {list => CGI}
/opt/sparrow/tmp/10304/opt/sparrow/plugins/public/cpan-package/story.t ..
# [/opt/sparrow/plugins/public/cpan-package/modules/cpanm]
# install CGI ...
# CGI is up to date. (4.31)
# install ok
ok 1 - output match 'install ok'
# [/opt/sparrow/plugins/public/cpan-package]
# cpan-package-done
ok 2 - output match 'cpan-package-done'
1..2
ok
All tests successful.
Files=1, Tests=2,  0 wallclock secs ( 0.01 usr  0.00 sys +  0.18 cusr  0.05 csys =  0.24 CPU)
Result: PASS

Ok, now it succeeded!

A few comments on package-generic usage:

• A limited set of platforms are supported - CentOS, Ubuntu, Debian. At least this works for me. If you need more - let me know or make a pull request!

• No "platform-sensitive" packages naming conventions available like in other more mature systems ( chef, ansible ).

One day I would like something like that into sparrowdo API:

task_run  %(
  task => 'install apache webserver',
  plugin => 'package-generic',
  parameters_for_platform => %(
    ubuntu => %( list => 'apache2' ),
    debian => %( list => 'apache2' ),
    cetnos => %( list => 'httpd' ),
    default => %( list => 'apache2' ),

  ),
);

• And finally. No specific version installation is supported. The plugin is quite simple. But it works for me. If you consider more complicated cases - let me know! :)

Cleaning up old packages

In case you have Ubuntu, Debian boxes a latest version of package-generic plugin make it possible to autoremove old, useless stuff:

task_run  %(
  task => 'remove old packages',
  plugin => 'package-generic',
  parameters => %( action => 'autoremove' )
);

That is it. Approaching to the end ... :)

All the best. And see you soon. I have not thought about next topic too much, but probably I will be talking about managing users and groups with the help of sparrowdo ...