Adoptable Cookbooks List

Looking for a cookbook to adopt? You can now see a list of cookbooks available for adoption!
List of Adoptable Cookbooks

Supermarket Belongs to the Community

Supermarket belongs to the community. While Chef has the responsibility to keep it running and be stewards of its functionality, what it does and how it works is driven by the community. The chef/supermarket repository will continue to be where development of the Supermarket application takes place. Come be part of shaping the direction of Supermarket by opening issues and pull requests or by joining us on the Chef Mailing List.

Select Badges

Select Supported Platforms


nodes (6) Versions 0.0.4

store node attributes in data bag items

cookbook 'nodes', '= 0.0.4'
cookbook 'nodes', '= 0.0.4', :supermarket
knife supermarket install nodes
knife supermarket download nodes
Quality 100%

nodes cookbook

This is a cookbook for managing node attributes in data bags.

The idea is, you probably keep your cookbooks, roles, environments, and data bags under version control, and maybe you even upload them via a CI server. Great. But then you can also set attributes on individual nodes using knife node edit. That doesn't sound like a good idea for long-term maintainability. Some people create per-node roles, but that doesn't seem very attractive.

So the solution proposed here is to store per-node attributes in data bag items. To make node-specific attribute changes, you just manipulate and upload your data bags using your normal change process. And include this cookbook in your run list to make the changes effective.

More precisely, at this to your run list, ideally very early:


Structure your data bags this way:


The data bag item name should be the Chef node name (usually the host name, but not necessarily).

The individual per-node data bag items should look like this:

  "id": "",

  "default_attributes": {
    "foo1": "bar1"
  "force_default_attributes": {
    "foo2": "bar2"
  "override_attributes": {
    "foo3": "bar3"
  "force_override_attributes": {
    "foo4": "bar4"

This looks very similar to a role or environment JSON file.

The attributes are actually applied in a recipe, so they have lower precedence than roles or environments. Since a per-node setting is usually supposed to override such global settings, the force_ variants will often be useful.

Here is a somewhat realistic example:

  "id": "",

  "force_override_attributes": {
    "sysctl": {
      "params": {
        "vm": {
          "swappiness": 0

Dependent cookbooks

This cookbook has no specified dependencies.

Contingent cookbooks

There are no cookbooks that are contingent upon this one.

Foodcritic Metric

0.0.4 passed this metric