Chef.md

General

Chef Dry Run

chef-client -Fmin --why-run

List Facts

ohai

Bootstrap Chef client

knife bootstrap <FQDN/IP>

Change Chef Run List

knife node run_list <add|remove> <node> <cookbook>::<recipe>

Runlist Status

knife status --run-list
knife status "role:webserver" --run-list

Nodes and Roles

List Node Info

knife node show <node>

List Nodes per Role

knife search node 'roles:<role name>'

Load role from file

knife role from file <file> [<file> [...]]

Data Bags

Load data bag from file

knife data bag from file <data bag name> <file>

knife + SSH

knife ssh -a ipaddress name:server1 "chef-client"

you can also use patterns:

knife ssh -a ipaddress name:www* "uptime"

Debugging

Inheritance

Debugging Attribute Inheritance

# Invoke chef shell in attribute mode
chef-shell -z
chef > attributes
chef:attributes >

# Query attributes examples
chef:attributes > default["authorized_keys"]
[...]
chef:attributes > node["packages"]
[...]

Editing Files

using a Script resource.

bash "some_commands" do
    user "root"
    cwd "/tmp"
    code <<-EOT
       echo "alias rm='rm -i'" >> /root/.bashrc
    EOT
end

Misc

• Hardening cookbook

• Drift Detection Cookbook

• Fix RabbitMQ 100% CPU usage

• Exporting Nagios Hostgroups

• Chef - Manage Amazon EC2 instances

• Chef - Tutorial on how to Setup Nagios in EC2

• Chef Enterprise - Push Jobs (using the Push Cookbook)

  knife job start ...
  knife job list
  
  knife node status ...