Ubuntu

Adding the nginx-plus Repository to apt-mirror and Puppet

JS Morisset Puppet, Ubuntu

Nginx Inc. provides access to the nginx-plus package and repository using SSL certificates. Their instructions include the configuration of apt for Ubuntu, but for people using apt-mirror and Puppet to manage their internal servers, additional custom configurations are required.

The standard apt configuration for nginx-plus might look like this:

$ cat /etc/apt/apt.conf.d/90nginx 
Acquire::https::plus-pkgs.nginx.com::Verify-Peer "true";
Acquire::https::plus-pkgs.nginx.com::Verify-Host "true";
Acquire::https::plus-pkgs.nginx.com::CaInfo      "/etc/ssl/nginx/CA.crt";
Acquire::https::plus-pkgs.nginx.com::SslCert     "/etc/ssl/nginx/nginx-repo.crt";
Acquire::https::plus-pkgs.nginx.com::SslKey      "/etc/ssl/nginx/nginx-repo.key";

The connection to the nginx-plus repository must be made using HTTPS and authentication is handled by client certificates. As provided, apt-mirror is not able to manage SSL certificates, so two sections in the apt-mirror script must be modified. The %config_variables array defines the settings read from its configuration files. We will add the ‘certificate’, ‘private_key’, and ‘ca_certificate’ settings to the array.

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Remove MultiArch / i386 in Ubuntu with Puppet

JS Morisset Puppet, Ubuntu

Here’s a little snippet I use to remove multiarch / i386 support from Ubuntu with Puppet.

if versioncmp( $::lsbdistrelease, "12.04" ) > 0 {
    exec { "remove-architecture i386":
        command => "/usr/bin/dpkg --remove-architecture i386",
        onlyif => "/usr/bin/dpkg --print-foreign-architectures | /bin/grep -q i386",
    }
} else {
    file { "/etc/dpkg/dpkg.cfg.d/multiarch": ensure => absent, }
}

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Multiple MongoDB Instances with Ubuntu’s Upstart

JS Morisset Ubuntu, Upstart

Recently a client asked me to setup multiple instances of MongoDB on a Linux Ubuntu server. Ubuntu does not use standard /etc/init.d/ scripts, instead it uses upstart, an event-based replacement for the /sbin/init daemon, that handles starting of tasks and services during boot, stopping them during shutdown and supervising them while the system is running. Upstart uses it’s own limited syntax to describe a service or task. I tried launching several processes from a single upstart config, but upstart could not track the service properly. Instead, I broke-up the upstart script into two — one master to define the instances, and another to start each one independently.

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