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POHow to share a hosts file between vagrant and puppet
 

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  1. POHow to share a hosts file between vagrant and puppet
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    <p>I am currently converting a large number of EC2 instances to a series of puppet scripts and then using Vagrant to virtualise the rig for local development.</p> <p>I have gotten stuck on managing the network in vagrant and mapping that onto production.</p> <p>First I have something like this:</p> <pre><code># Main Web Server config.vm.define :app do |app_config| app_config.vm.host_name = "web1" app_config.vm.network :hostonly, "10.0.0.2" app_config.vm.box = "precise64" ...etc puppet.manifest_file = "persist/web.pp" end # First DB server config.vm.define :db1 do |db1_config| db1_config.vm.host_name = "db1" db1_config.vm.network :hostonly, "10.0.0.3" db1_config.vm.box = "precise64" ...etc puppet.manifest_file = "persist/db.pp" end etc. </code></pre> <p>Then in this case web.pp and db.pp are reasonably simply they just setup python, uwsgi, nginx, mysql etc.</p> <p>So the problem: I need inside for example <code>puppet/modules/hosts/files/hosts</code> have to specify something like:</p> <pre><code>10.0.0.3 db1.X.com 10.0.0.4 db2.X.com etc. </code></pre> <p>In production we use a combination of our sites DNS and ec2 instances DNS records (which I cant put into hosts). Typically our haproxy hosts have a public DNS record and they hold the EC2 names in their config (which makes using a hosts file impossible).</p> <p>So how can I build a file that both puppet and vagrant can import and use a global mapping such as:</p> <pre><code>hosts = { web =&gt; 10.0.0.2, db1 =&gt; 10.0.0.3, db2 =&gt; 10.0.0.4, } </code></pre> <p>Which I can access from within puppet templates for example <code>haproxy.cfg</code> but also access from within Vagrant files so i can set <code>vm.network</code> to it as well.</p> <p>Restrictions:</p> <ul> <li>Cannot be IP only, must be symbolic name to either IP or DNS</li> <li>Cannot use a puppet master (unfortunately not flexible on this one).</li> <li>Virtualising the DNS server as well seems messy so id rather not.</li> </ul> <p>Also I am <strong>really</strong> new to ruby, if you provide examples (which would be great) please describe it enough for me to be able to find my way through the ruby docs.</p>
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