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acme (11) Versions 4.1.2

ACME client cookbook for free and trusted SSL/TLS certificates from Let's Encrypt

Policyfile
Berkshelf
Knife
cookbook 'acme', '= 4.1.2', :supermarket
cookbook 'acme', '= 4.1.2'
knife supermarket install acme
knife supermarket download acme
README
Dependencies
Changelog
Quality 33%

ACME cookbook

Build Status
Cookbook Version

Automatically get/renew free and trusted certificates from Let's Encrypt (letsencrypt.org).
ACME is the Automated Certificate Management Environment protocol used by Let's Encrypt.

Starting with v4.0.0 of the acme cookbook the acme_ssl_certificate provider has been removed! The TLS-SNI-01 validation method used by this provider been disabled by Let's Encrypt due to security concerns. Please switch to the acme_certificate provider in this cookbook to request and renew your certificate using the supported HTTP-01 validation method.

Attributes

Attribute Description Default
contact Contact information, default empty. Set to mailto:your@email.com []
dir ACME server endpoint, Set to https://acme-staging-v02.api.letsencrypt.org/directory if you want to use the Let's Encrypt staging environment and corresponding certificates. https://acme-v02.api.letsencrypt.org/directory
renew Days before the certificate expires at which the certificate will be renewed 30
source_ips IP addresses used by Let's Encrypt to verify the TLS certificates, it will change over time. This attribute is for firewall purposes. Allow these IPs for HTTP (tcp/80). ['66.133.109.36']
private_key Private key content of registered account. Private keys identify the ACME client with the endpoint and are not transferable between staging and production endpoints. nil
key_size Default private key size used when resource property is not. Must be one out of: 2048, 3072, 4096. 2048

Recipes

default

Installs the required acme-client rubygem.

Usage

Use the acme_certificate resource to request a certificate with the http-01 challenge. The webserver for the domain for which you are requesting a certificate must be running on the local server. This resource only supports the http validation method. To use the tls-sni-01 challenge, please see the resource below. Provide the path to your wwwroot for the specified domain.

acme_certificate 'test.example.com' do
  crt               '/etc/ssl/test.example.com.crt'
  key               '/etc/ssl/test.example.com.key'
  wwwroot           '/var/www'
end

If your webserver needs an existing certificate already when installing a new server, you will have a bootstrap problem: The web server cannot start without a certificate, but the certificate cannot be requested without the running web server. To overcome this, a temporary self-signed certificate can be generated with the acme_selfsigned resource, allowing the web server to start.

acme_selfsigned 'test.example.com' do
  crt     '/etc/ssl/test.example.com.crt'
  chain   '/etc/ssl/test.example.com-chain.crt'
  key     '/etc/ssl/test.example.com.key'
end

A working example can be found in the included acme_client test cookbook.

Providers

certificate

Property Type Default Description
cn string name The common name for the certificate
alt_names array [] The common name for the certificate
crt string nil File path to place the certificate
key string nil File path to place the private key
key_size integer 2048 Private key size. Must be one out of: 2048, 3072, 4096
owner string root Owner of the created files
group string root Group of the created files
wwwroot string /var/www Path to the wwwroot of the domain
ignore_failure boolean false Whether to continue chef run if issuance fails
retries integer 0 Number of times to catch exceptions and retry
retry_delay integer 2 Number of seconds to wait between retries
endpoint string nil The Let's Encrypt endpoint to use
contact array [] The contact to use

selfsigned

Property Type Default Description
cn string name The common name for the certificate
crt string nil File path to place the certificate
key string nil File path to place the private key
key_size integer 2048 Private key size. Must be one out of: 2048, 3072, 4096
chain string nil File path to place the certificate chain
owner string root Owner of the created files
group string root Group of the created files

Example

To generate a certificate for an apache2 website you can use code like this:

# Include the recipe to install the gems
include_recipe 'acme'

# Set up contact information. Note the mailto: notation
node.override['acme']['contact'] = ['mailto:me@example.com']
# Real certificates please...
node.override['acme']['endpoint'] = 'https://acme-v01.api.letsencrypt.org'

site = "example.com"
sans = ["www.#{site}"]

# Generate a self-signed if we don't have a cert to prevent bootstrap problems
acme_selfsigned "#{site}" do
  crt     "/etc/httpd/ssl/#{site}.crt"
  key     "/etc/httpd/ssl/#{site}.key"
  chain    "/etc/httpd/ssl/#{site}.pem"
  owner   "apache"
  group   "apache"
  notifies :restart, "service[apache2]", :immediate
end

# Set up your web server here...

# Get and auto-renew the certificate from Let's Encrypt
acme_certificate "#{site}" do
  crt               "/etc/httpd/ssl/#{site}.crt"
  key               "/etc/httpd/ssl/#{site}.key"
  wwwroot           "/var/www/#{site}/htdocs/"
  notifies :restart, "service[apache2]"
  alt_names sans
end

Testing

The kitchen includes a pebble server to run the integration tests with, so testing can run locally without interaction with the online APIs.

Contributing

  1. Fork the repository on Github
  2. Create a named feature branch (like add_component_x)
  3. Write your change
  4. Write tests for your change (if applicable)
  5. Run the tests, ensuring they all pass
  6. Submit a Pull Request using Github

License and Authors

Authors: Thijs Houtenbos thoutenbos@schubergphilis.com

Credits

Let’s Encrypt is a trademark of the Internet Security Research Group. All rights reserved.

Dependent cookbooks

This cookbook has no specified dependencies.

Contingent cookbooks

teleport-le Applicable Versions

ACME Cookbook Changelog

This file is used to list changes made in each version of the acme cookbook.

4.1.2

  • zedtux - upgrade acme-client version to 2.0.6

4.1.1

  • petracvv - lazy evaluation in resource attributes

4.1.0

  • hrak - Ease version constraints on supported platforms
  • zakame - Rename endpoint attribute to dir
  • zakame - Remove chain and fullchain properties
  • zakame - Switch to pebble for integration testing
  • zakame - Implement ACME v2 support
  • Dawnflash - Clean up token files after use
  • bby-bishopclark - Various trivial English fixes in README
  • rmoriz - bump acme-client gem to 2.0.3
  • SeanSith - Marked fullchain as a deprecated_property_alias
  • zakame - Fixes for the Travis and kitchen tests

4.0.0

The TLS-SNI-01 validation method has been removed as it is no longer supported by Let's Encrypt.

  • borgified - Documentation fix
  • ibaum - Override endpoint from provider
  • jeffbyrnes - Removed support for TLS-SNI-01 validation
  • jeffbyrnes - Refactor LWRPs into Custom Resources
  • jeffbyrnes - Foodcritic, cookstyle and build improvements
  • thoutenbos - Upgrade acme-client gem to v0.6.2

3.1.0

  • axos88 - Add ssl validation method
  • notapatch - Update README
  • funzoneq - Extra validation server IP
  • faucct - Remove unknown attribute validation 'min'
  • faucct - Make sure nginx reloads
  • wndhydrnt - Update certificate when common name / alternate names change

3.0.0

By changes in Chef 13, the unused property method has been removed from the certificate provider.

  • mattrobenolt - Do not allow a crt without an accompanying chain
  • alex-tan - Improve README
  • rmoriz - Allow setting custom key size
  • szymonpk - Add missing matchers
  • rmoriz - Chef 13 compatibility
  • rmoriz - Multiple CI build improvements

2.0.0

  • thoutenbos - Rename from letsencrypt to acme to comply with the ISRG trademark policy
  • arr-dev - Add ChefSpec matchers

1.0.3

  • chr4 - Bump versions of json-jwt and acme-client
  • thoutenbos - Upgrade acme-client to drop dependencies

1.0.2

  • miguelaferreira - Wrap test cookbooks in :integration group

1.0.1

  • thoutenbos - Work around gem dependency problems
  • thoutenbos - Rubocop fixes
  • thoutenbos - Improve the example

1.0.0

  • seccubus - Make production the default end-point
  • seccubus - Add apache2 example
  • thoutenbos - Fix for chef-client v11 compatibility
  • thoutenbos - Fix integration tests

0.1.7

  • glaszig - Use chef api inside ruby_block
  • arr-dev - Document node['letsencrypt']['private_key']

0.1.6

  • funzoneq - Add verification IP for firewalling purposes
  • acoulton - fail chef run if certificate not issued, unless ignore_failure resource attribute set

0.1.5

  • thoutenbos - fix selfsigned chain

0.1.4

  • patcon - spin-off the boulder test cookbook
  • patcon - add Ubuntu support
  • thoutenbos - various improvements

0.1.3

  • sawanoboly - Add SAN support

0.1.2

  • obazoud - Improved logging
  • thoutenbos - Add Kitchen CI
  • thoutenbos - Fix key/cert creation order issue

0.1.1

  • Thijs Houtenbos - Added chain and fullchain properties

0.1.0

  • Thijs Houtenbos - Initial release

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Collaborator Number Metric
            

4.1.2 failed this metric

Failure: Cookbook has 0 collaborators. A cookbook must have at least 2 collaborators to pass this metric.

Contributing File Metric
            

4.1.2 failed this metric

Failure: To pass this metric, your cookbook metadata must include a source url, the source url must be in the form of https://github.com/user/repo, and your repo must contain a CONTRIBUTING.md file

Foodcritic Metric
            

4.1.2 passed this metric

No Binaries Metric
            

4.1.2 passed this metric

Testing File Metric
            

4.1.2 failed this metric

Failure: To pass this metric, your cookbook metadata must include a source url, the source url must be in the form of https://github.com/user/repo, and your repo must contain a TESTING.md file

Version Tag Metric
            

4.1.2 failed this metric

Failure: To pass this metric, your cookbook metadata must include a source url, the source url must be in the form of https://github.com/user/repo, and your repo must include a tag that matches this cookbook version number