I'm working with Chef and Test Kitchen, I have some problems installing Apache 2.2 and I was reading the cookbook with my recipe (https://github.com/sous-chefs/apache2/blob/master/recipes/default.rb), I would like to know how this recipe is working when installed Apache and I want print some variables when I launch my recipe:
node['platform_family']
node['platform_version']
An example from Chef official doc:
Chef::Log.fatal('You did not accept the license (set node["splunk"]["accept_license"] to true)')
But I write in my recipe:
Chef::Log.info('PERSONAL-LOG,node["platform_family"]')
I get the log, but exactly with the same text I write, I cant concatenate or call the var directly.
Can someone help me?
Its a case of ruby string interpolation, please use it as:-
Chef::Log.info("PERSONAL-LOG, #{node['platform_family']}")
http://ruby-for-beginners.rubymonstas.org/bonus/string_interpolation.html
Related
From default.rb, I want to access the relative path of the cookbook.
I tried doing:
print "cookbook path: " + run_context.cookbook_collection[cookbook_name].root_dir
but I get
TypeError
---------
no implicit conversion of nil into String
I tried replacing cookbook_name with my cookbook name, but get the same error.
Any help would be appreciated.
This is not a supported API, we do not offer it in an official capacity. Any use of such APIs is at your own risk and will break in the future so you should be comfortable enough with reading the code to find things yourself.
The following worked for me: Chef::Config[:cookbook_path]
I have built a stanza to remove a ruby gem package from our servers. The problem is that the ruby gem executable is installed in different paths on the servers, so on one server it could be in /opt/ruby/bin/gem on other servers it's in /usr/local/rvm/rubies/ruby-2.0.0-p353/bin/gem
My stanza uses the generate function in puppet to pull out the default ruby gem installation as follows:
$ruby_gem_location = generate('which', 'gem')
exec { "remove-remote_syslog":
command => "gem uninstall remote_syslog",
path => "$ruby_gem_location:/opt/ruby/bin:/usr/bin:/usr/sbin",
onlyif => "$ruby_gem_location list|grep remote_syslog"
}
When I run puppet agent I get the following error:
Generators must be fully qualified at ****redacted*
I have also tried to provide a default path for the which command as follows:
$ruby_gem_location = generate('/usr/bin/which', 'gem')
and now the error says : Could not evaluate: Could not find command '/usr/bin/gem
I checked the target server and the gem command is in
/usr/local/rvm/rubies/ruby-2.0.0-p353/bin/gem
What am I doing wrong?
How can I pull out the default ruby gem location on our servers?
Thank you in advance
Your code
$ruby_gem_location = generate('/usr/bin/which', 'gem')
will generate a full path to your gem command (if it succeeds). From the result you describe, I think it is generating '/usr/bin/gem', which is perhaps a symlink to the real gem command. You are putting that into your command path instead of just the directory part, and that will not be helpful. It is not, however, the source of the error message you report.
The real problem here is that generate(), like all DSL fucntions, runs during catalog building. I infer from your results that you are using a master / agent setup, so generate() is giving you a full path to gem -- evidently /usr/bin/gem -- on the master. Since the whole point is that different servers have gem installed in different places, this is unhelpful. The actual error message arises from an attempt to execute your onlyif command with the wrong path to gem.
Your best way forward is probably to create a custom fact with which each node can report the appropriate location of the gem binary. You can then use that fact's value in your Exec, maybe:
exec { "remove-remote_syslog":
command => "$::ruby_gem_path uninstall remote_syslog",
onlyif => "$::ruby_gem_path list | grep remote_syslog"
}
Note that you don't need a path attribute if you give a complete path to the executable in the first place.
Details on creating the $::ruby_gem_path custom fact depend on a number of factors, and in their full generality they are rather too broad for SO, but PL provides good documentation.
I am trying to use "elasticsearch/cookbook-elasticsearch" cookbook for with my wrapper cookbook. I want to override following default attributes from cookbook-elasticsearch in my wrapper cookbook.
default.elasticsearch[:rpm_url] = "https://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-0.90.12.noarch.rpm"
default.elasticsearch[:rpm_sha] = "ab7ea2e00d8f1b73642e3ea44d9647b11e6b0b96"
Cookbook : https://github.com/elasticsearch/cookbook-elasticsearch
How do I do this in my-elasticsearch cookbook ?
cat site-cookbooks/my-elasticsearch/attributes/default.rb
override.elasticsearch[:rpm_url] = "https://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-1.4.4.noarch.rpm"
override.elasticsearch[:rpm_sha] = "ec8b41c54a6d897479645b2507476e0824bc71db"
is this correct one ?
I want to use this cookbook for chef 10
any help
To add information to #mark-oconnor comment:
Documentation about attributes in chef 10.
Recommended notation would be override['elasticsearch']['rpm_url'] = "new_value" the method and symbol way to access attributes have been problematic in the past.
As the cookbook loading order in chef 10 is not always clearly predictable you have to use override level to ensure the correct value is used when compîling recipes.
Edit after comments:
In the elasticsearch cookbook in version 0.3.13 the default recipe install from tarball.
If you wish to use a packaged install you have to call the corresponding recipe before the default, as in the default recipe there's a guard to not install tarball if elasticsearch is already installed.
The correct recipe in wrapper cookbook for this particular case is:
include_recipe 'elasticsearch::rpm' # Take the overriden attributes and install package
include_recipe 'elasticsearch' # no need to ::default, if omitted it's the recipe loaded
I'm working on a infrastructure where some servers don't have access to the internet, so I have to push the packages to the local repo before declaring them to be installed on Chef.
However we've been on a situation where Chef failed to install a package since the package wasn't there on some boxes and it has been successful on some other boxes.
What I want to do is to run a Ruby/RSpec test before applying Chef config on the nodes to make sure the packages declared on the recipes do actually exist on the repo.
In order to do that I need to be able to list all the packages exists in the our recipes.
My question is: Is there anyway to list all the declared packages in Chef? I had a quick look at Chef::Platform and ChefSpec but unfortunately couldn't find anything useful to my problem.
Do you have any idea where is the best place to look at?
If you use ChefSpec you can find all the packages by calling chef_run.find_resources(:package) inside some test. See the source code. Like this:
require 'chefspec'
describe 'example::default' do
let(:chef_run) { ChefSpec::Runner.new.converge(described_recipe) }
it 'does something' do
chef_run.find_resources(:package)...
end
end
You could install one or more of the community ohai plugins. For example the following will return information about installed sofware:
debian
Redhat
windows
Once the plugins are enabled they will add additional node attributes that will be searchable from chef-server.
I have a question for the Ruby and Chef hackers.
I have very limited knowledge of Chef and even less on Ruby programming language, however, I need to implement on Chef (chef-solo) something similar to "augeas" (which works with Puppet, but here I need a solution for Chef).
I got the example code below but it's not working and I am now for a few days trying to figure out what is wrong.
Basically I need to be able to select specific strings in a text file and modify these values. I could use sed but perhaps I can do it in a more elegant way using the ruby_block from Chef.
Please let me know what can be possibly wrong with the code below. Why is my /etc/hosts not being updated with new values?
Always when I re-run chef-solo, I get the following error:
NoMethodError
-------------
undefined method `chef' for Chef::Resource::RubyBlock
Thanks for your help.
Follows my default.rb file:
ruby_block "edit etc hosts" do
block do
rc = Chef::Util::FileEdit.new("/etc/hosts")
rc.search_file_replace_line(
/^127\.0\.0\.1 localhost$/,
"127.0.0.1 #{new_fqdn} #{new_hostname} localhost"
)
rc.write_file
end
end
Add this line as the first line of your ruby block:
require 'chef/util/file_edit'
According to your case, you should use the cookbook hostsfile:
hostsfile_entry '127.0.0.1' do
hostname new_hostname
aliases [new_fqdn]
comment 'Append by Recipe X'
action :append
end
It shouldn't be too hard to get Augeas to work with Chef. Augeas is a C library, and Puppet simply uses its Ruby bindings. You just need to make use of these bindings in Chef.
There is a PoC Augeas resource provider for Chef here: https://github.com/craigtracey/augeas.
Note: http://lists.opscode.com/sympa/arc/chef/2013-02/msg00337.html mentions Augeas integration into Chef, but apparently the participants misunderstand Augeas as they mention idempotency issues and deltas. Most uses of Augeas don't lead to managing deltas, but desired states.