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A resource represents a piece of infrastructure and its desired state, such as a package that should be installed, a service that should be running, or a file that should be generated.
A recipe is a collection of resources that describes a particular configuration or policy. A recipe describes everything that is required to configure part of a system. Recipes do things such as:
When you don’t specify a resource’s action, Chef applies the default action.
A recipe is a collection of resources, and typically configures a software package or some piece of infrastructure. A cookbook groups together recipes and other information in a way that is more manageable than having just recipes alone.
For example, in this lesson you used a template resource to manage your HTML home page from an external file. The recipe stated the configuration policy for your web site, and the template file contained the data. You used a cookbook to package both parts up into a single unit that you can later deploy.
Chef-apply apply a single recipe; chef-client applies a cookbook.
For learning purposes, we had you start off with chef-apply because it helps you understand the basics quickly. In practice, chef-apply is useful when you want to quickly test something out. But for production purposes, you typically run chef-client to apply one or more cookbooks.
The run-list lets you specify which recipes to run, and the order in which to run them. The run-list is important for when you have multiple cookbooks, and the order in which they run matters.
The Starter Kit provides certificates and other files that enable you to securely communicate with the Chef server.
A node represents a server and is typically a virtual machine, container instance, or physical server – basically any compute resource in your infrastructure that’s managed by Chef.
During the bootstrap process, the node downloads and installs chef-client, registers itself with the Chef server, and does an initial check in. During this check in, the node applies any cookbooks that are part of its run-list.
Knife cookbook upload.
We mentioned two ways.
Run knife Ssh from your workstation.
SSH directly into your server and run chef-client.
You can also run chef-client as a daemon, or service, to check in with the Chef server on a regular interval, say every 15 or 30 minutes.
Update your Apache cookbook to display your node’s host name, platform, total installed memory, and number of CPUs in addition to its FQDN on the home page.
Update index.html.erb like this.
<h1>hello from <%= node [‘fqdn’] %>< /h1>
<%= node [‘hostname’] %>
<%= node [‘platform’] %> – <%= node[‘platform_version’] %>
<%= node [‘memory’][‘total’] %> RAM
<%= node [‘cpu’][‘total’] %> CPUs
Then upload your cookbook and run it on your node.
According to Semantic Versioning, you should set your cookbook’s version number to 1.0.0 at the point it’s ready to use in production.
You already accomplished the majority of the tasks that you need. You wrote the awesome customers cookbook, uploaded it and its dependent cookbooks to the Chef server, applied the awesome customers cookbook to your node, and verified that everything’s working.
All you need to do now is:
Local development with Test Kitchen:
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