Errata for Learning Chef

Chapter 3: "Ruby Syntax and Examples" under header "Mathematical Operations" "You can use the Math.hypot method in a Ruby script to calculate the length of a diagonal for a right triangle by returning the sum of the squares of its two sides:" Per documentation (and mathematical definition of hypotenuse of a right-angled triangle) the above line should be (square brackets to point out additional text): "You can use the Math.hypot method in a Ruby script to calculate the length of a diagonal for a right triangle by returning [the square root] of the sum of the squares of its two sides:" http://www.ruby-doc.org/core-2.1.4/Math.html#method-c-hypot

Note from the Author or Editor:
"You can use the Math.hypot method in a Ruby script to calculate the length of a diagonal for a right triangle by returning the sum of the squares of its two sides:" to "You can use the Math.hypot method in a Ruby script to calculate the length of a diagonal for a right triangle by returning the square root of the sum of the squares of its two sides:"

Example 12-1, the full listing of kitchen.yml, uses data_bags_path where it should use nodes_path. The paragraph immediately before appears correct when it says, "Edit the .kitchen.yml make sure you are using the chef_zero provisioner and our favorite basebox image as shown in Example 12-1. Notice there is a new addition to the provisioner: stanza, the nodes_path: provisioner: name: chef_zero nodes_path: ../../nodes nodes_path is a relative path pointing to the chef-playground/nodes directory we created with our test data in Chapter 11." However, example 12-1 does not match this, and has: provisioner: name: chef_zero data_bags_path: ../../nodes

Note from the Author or Editor:
Thanks, yes, it should be nodes_path.

Chef requires Administrator changes to run. should be: Administrator permissions...

“prices.values #=> [1.00, 5.23, 4.65, 6.99]” should be: “prices.values #=> [4.55, 5.23, 4.65, 6.99]”

Note from the Author or Editor:
You are correct, thank you!

The output of the "kitchen login" command is given as: The hostname of this node is 10.0.2.15 The IP address of this node is default-centos65 It should be: This hostname of this node is default-centos-65 The IP address of this node is 10.0.2.15

In the code block for the "reconfigure-chef-server" resource, the command is "chef-server-ctl reconfigure" while in other locations (pp. 155 and 160) "private-chef-ctl" is used instead. It appears that "chef-server-ctl" isn't installed by Enterprise Chef Server. "chef-server-ctl" is also mistakenly referred to on pp. 157 and 158.

Note from the Author or Editor:
All instances of "reconfigure-chef-server" should be changed to "chef-server-ctl reconfigure". All instances of "private-chef-ctl" should be changed to "chef-server-ctl", but a caveat/note should be made that prior versions of Chef 12 server used "private-chef-ctl". A link to this page should also be provided: https://docs.chef.io/ctl_chef_server.html

The commands to be run are shown as: $ cd ~/chef-repo/cookbooks/enterprise-chef/.kitchen/kitchen-vagrant/ $ default-centos65 vagrant halt It should be: $ cd ~/chef-repo/cookbooks/enterprise-chef/.kitchen/kitchen-vagrant/default-centos65 $ vagrant halt The same mistake appears one more time in the next page. The command is shown as: $ cd ~/chef-repo/cookbooks/enterprise-chef/.kitchen/kitchen-vagrant/ $ default-centos65 vagrant reload It should be: $ cd ~/chef-repo/cookbooks/enterprise-chef/.kitchen/kitchen-vagrant/default-centos65 $ vagrant reload

Note from the Author or Editor:
The commands should not include "default-centos65" (just "vagrant halt" and "vagrant reload")

“Run the exit command to get back to the host prompt, then run kitchen destroy default-centos-65” Should be: “Run the exit command to get back to the host prompt, then run kitchen destroy default-centos65” (default-centos65 without the hyphen between centos and 65

To match the results on Figure 15-3 (specifically the port number) the .kitchen.yml should have run_list: - role[webserver] instead of recipe[apache::default]

Note from the Author or Editor:
The .kitchen.yml file uses a bad path for the roles folder and a run_list of recipe[apache::default] instead of role[webserver] Should be: roles_path: ../../roles and run_list: - role[webserver] or the output will not match what's printed in the book.

Examples of '.kitchen.yml' in 15-5 and 15-13 should have 'role[webmaster]' instead of 'recipe[apache::default]' in 'run_list' for the test to work as it is described in the chapter. Also there is a typo at the end of the chapter. When it says "Run kitchen destroy with no parameters...", there is 'kitchen converge dev-centos65', but the output is correct (showing how the instance is being destroyed).