(R)?ex Deployment & Configuration Management

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News

2015-01-11
(R)?ex 0.57.0 released. This is a bugfix release. See the release notes for more details.
2015-01-07
Repositor.io 0.4.0 released. repositor.io is a repository management tool for apt and yum. This release brings support for Redhat Enterprise mirrors. See the website for more details.
2015-01-04
Repositor.io 0.3.0 released. repositor.io is a repository management tool for apt and yum. This release brings support for private docker registry and to query errata information for packages. See the website for more details.
2014-12-30
(R)?ex 0.56.0 released. This is mostly a bugfix release but we also added a some new features. See the release notes for more details.
2014-11-14
Gabor Szabo wrote an article on (R)?ex, focusing on different authentication methods and with tips about how to secure your unattended access. Check it out at Perl Maven!
2014-11-07
(R)?ex will be at the Nordic Perl Workshop 2014 with a talk sponsored by adjust. Thank you!
2014-05-31
Read the new howto to setup OpenLDAP and SSSD with Rex.

Conferences

2014-09-19

This year there is a Rex workshop on the Kieler LinuxTag. You can register for this workshop in the workshop page.

Need Help?

Rex is a pure open source project, you can find community support in the following places:

Professional support is also available.

Why use Rex?

If you have to do a task more than once, automate it!

Don‘t forget an installation step anymore. Automation reduces the risk of failure and let you do your real work.

Advantages

  • uses ssh, no agent required
  • seamless integration, no conflicts
  • easy to use and to extend
  • easy to learn, it‘s just plain perl

Open Source

We believe in the idea of open source. So Rex and all its parts are released under Apache 2.0 license.

You‘re invited to join the community to make Rex better and better.

Uptime?

This command line example will execute "uptime" on all the given hosts (frontend01, frontend02, ...).

$ rex -H "frontend[01..15] middleware[01..05] db[01..04]" -e "say run 'uptime'"

The same, but with a Rexfile

desc "Get Disk Free";
task "disk_free", sub {
   my $output = run "df -h";
   say $output;
};

Now you can run your Task with this command

$ rex -H "frontend[01..15] middleware[01..05] db[01..04]" disk_free

Keep Your Configuration In Sync

This example will install the Apache Webserver on 5 servers and keep the configuration in sync. If the configuration file was changed it will automatically reload apache.

If this task gets executed against a virgin host (where no apache is installed) it will first install it.

user "root";
group frontend => "frontend[01..05]";

desc "Prepare Frontend Server";
task "prepare", group => "frontend", sub {
  pkg "apache2",
    ensure => "latest";

  service "apache2",
    ensure => "started";
};

desc "Keep Configuration in sync";
task "configure", group => "frontend", sub {
  prepare();

  file "/etc/apache2/apache2.conf",
    source    => "files/etc/apache2/apache2.conf",
    on_change => sub { service apache2 => "reload"; };
};

Running under sudo?

You can also run everything with sudo. Just define the sudo password and activate sudo.

user "ubuntu";
group frontend => "frontend[01..05]";
sudo TRUE;

desc "Prepare Frontend Server";
task "prepare", group => "frontend", sub {
  pkg "apache2",
    ensure => "latest";

  service "apache2",
    ensure => "started";
};

desc "Keep Configuration in sync";
task "configure", group => "frontend", sub {
  prepare();

  file "/etc/apache2/apache2.conf",
    source    => "files/etc/apache2/apache2.conf",
    on_change => sub { service apache2 => "reload"; };
};
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