cookbook 'ssh_known_hosts', '= 3.0.0'
ssh_known_hosts
(35) Versions
3.0.0
-
Follow66
Dyanmically generates /etc/ssh/ssh_known_hosts based on search indexes
cookbook 'ssh_known_hosts', '= 3.0.0', :supermarket
knife supermarket install ssh_known_hosts
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ssh_known_hosts Cookbook
The Chef ssh_known_hosts cookbook exposes resource and default recipe for adding hosts and keys to the /etc/ssh/ssh_known_hosts file.
- The default recipe builds
/etc/ssh/ssh_known_hostsbased either on search indexes usingrsa,dsakey types and ohai data or, when['ssh_known_hosts']['use_data_bag_cache']istrue, on the contents of a data bag that is maintained by thecacherrecipe running on a worker node. - The cacher recipe builds and maintains a data bag based on search indexes using
rsa,dsakey types and ohai data. - The LWRP provides a way to add custom entries in your own recipes.
You can also optionally put other host keys in a data bag called "ssh_known_hosts". See below for details.
Requirements
Platforms
Should work on any operating system that supports /etc/ssh/ssh_known_hosts.
Chef
As of version 3.0.0 this cookbook is Chef 12.0+ as we have eliminated the use of the now deprecated partial_search cookbook. Filtered search is included as of chef-client 12.0.
Usage
Resources
Use the LWRP ssh_known_hosts_entry to append an entry for the specified host in /etc/ssh/ssh_known_hosts. For example:
ssh_known_hosts_entry 'github.com'
This will append an entry in /etc/ssh/ssh_known_hosts like this:
# github.com SSH-2.0-OpenSSH_5.5p1 Debian-6+squeeze1+github8 github.com ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAq2A7hRGmdnm9tUDbO9IDSwBK6TbQa+PXYPCPy6rbTrTtw7PHkccKrpp0yVhp5HdEIcKr6pLlVDBfOLX9QUsyCOV0wzfjIJNlGEYsdlLJizHhbn2mUjvSAHQqZETYP81eFzLQNnPHt4EVVUh7VfDESU84KezmD5QlWpXLmvU31/yMf+Se8xhHTvKSCZIFImWwoG6mbUoWf9nzpIoaSjB+weqqUUmpaaasXVal72J+UX2B+2RPW3RcT0eOzQgqlJL3RKrTJvdsjE3JEAvGq3lGHSZXy28G3skua2SmVi/w4yCE6gbODqnTWlg7+wC604ydGXA8VJiS5ap43JXiUFFAaQ==
You can optionally specify your own key, if you don't want to use ssh-keyscan:
ssh_known_hosts_entry 'github.com' do key 'node.example.com ssh-rsa ...' end
Cacher
Use the cacher recipe on a single "worker" node somewhere in your cluster to maintain a data bag (server_data/known_hosts by default) containing all of your nodes host keys. The advantage to this approach is that is much faster than running a search of all nodes, and substantially lightens the load on locally hosted Chef servers. The drawback is that the data is slightly delayed (because the cacher worker must converge first).
To use the cacher, simply include the ssh_known_hosts::cacher cookbook in a wrapper cookbook or run list on a designated worker node.
Attributes
The following attributes are set on a per-platform basis, see the attributes/default.rb.
-
node['ssh_known_hosts']['file']- Sets up the location of the ssh_known_hosts file for the system. Defaults to '/etc/ssh/ssh_known_hosts' -
node['ssh_known_hosts']['key_type']- Determines which key type ssh-keyscan will use to determine the host key, different systems will have different available key types, check your manpage for available key types for ssh-keyscan. Defaults to 'rsa,dsa' -
node['ssh_known_hosts']['use_data_bag_cache']- Use the data bag maintained by the cacher server to build/etc/ssh/ssh_known_hostsinstead of a direct search (requires that a node be set up to run the cacher recipe regularly). -
node['ssh_known_hosts']['cacher']['data_bag']/node['ssh_known_hosts']['cacher']['data_bag_item']- Data bag where cacher recipe should store its keys.
LWRP Attributes
<table>
<thead>
<tr>
<th>Attribute</th>
<th>Description</th>
<th>Example</th>
<th>Default</th>
</tr>
</thead>
<tbody>
<tr>
<td>host</td>
<td>the host to add</td>
<td><tt>github.com</tt></td>
<td></td>
</tr>
<tr>
<td>key</td>
<td>(optional) provide your own key</td>
<td><tt>ssh-rsa ...</tt></td>
<td><tt>ssh-keyscan -H #{host}</tt></td>
</tr>
<tr>
<td>port</td>
<td>(optional) the server port that ssh-keyscan will use to gather the public key</td>
<td><tt>2222</tt></td>
<td><tt>22</tt></td>
</tr>
</tbody>
</table>
Default Recipe
Searches the Chef Server for all hosts that have SSH host keys using rsa,dsa key types and generates an /etc/ssh/ssh_known_hosts.
Adding custom host keys
There are two ways to add custom host keys. You can either use the provided LWRP (see above), or by creating a data bag called "ssh_known_hosts" and adding an item for each host:
{
"id": "github",
"fqdn": "github.com",
"rsa": "github-rsa-host-key"
}
There are additional optional values you may use in the data bag:
<table>
<thead>
<tr>
<th>Attribute</th>
<th>Description</th>
<th>Example</th>
<th>Default</th>
</tr>
</thead>
<tbody>
<tr>
<td>id</td>
<td>a unique id for this data bag entry</td>
<td><tt>github</tt></td>
<td></td>
</tr>
<tr>
<td>fqdn</td>
<td>the fqdn of the host</td>
<td><tt>github.com</tt></td>
<td></td>
</tr>
<tr>
<td>rsa</td>
<td>the rsa key for this server</td>
<td><tt>ssh-rsa AAAAB3...</tt></td>
<td></td>
</tr>
<tr>
<td>ipaddress</td>
<td>the ipaddress of the node (if fqdn is missing)</td>
<td><tt>1.1.1.1</tt></td>
<td></td>
</tr>
<tr>
<td>hostname</td>
<td>local hostname of the server (if not a fqdn)</td>
<td><tt>myserver.local</tt></td>
<td></td>
</tr>
<tr>
<td>dsa</td>
<td>the dsa key for this server</td>
<td><tt>ssh-dsa ABAAC3...</tt></td>
<td></td>
</tr>
</tbody>
</table>
ChefSpec matchers
A custom matcher is available for you to use in recipe tests.
describe 'my_cookbook::my_recipe' do
let(:chef_run) { ChefSpec::Runner.new.converge(described_recipe) }
it { expect(chef_run).to append_to_ssh_known_hosts 'github.com' }
end
License & Authors
Author: Cookbook Engineering Team (cookbooks@chef.io)
Copyright: 2008-2016, Chef Software, Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Dependent cookbooks
This cookbook has no specified dependencies.
Contingent cookbooks
ssh_known_hosts CHANGELOG
This file is used to list changes made in each version of the ssh_known_hosts cookbook.
v3.0.0 (2016-07-14)
- [#55] Remove deprecated cookbook dependency on partial_search making cookbook Chef 12+ only
v2.1.0 (2016-07-13)
- [#51] Add support for ECDSA and ED25519 keys josacar
- [#42] Check for nil FQDN realloc
v2.0.0 (2014-12-02)
- [#36] Fix the way keys are rendered
- [#22] Update to README
- [#32] Clean up logging
- [#23] Do not hash public keys
- [#34] Serverspec updates
- [#28] Add data bag caching option
- [#20] Add checspec matchers
- [#33] Add test to verify chefspec matcher
v1.3.2 (2014-04-23)
- [COOK-4579] - Do not use ssh-keyscan stderr
v1.3.0 (2014-04-09)
- [COOK-4489] Updated ssh-keyscan to include -t type
v1.2.0 (2014-02-18)
Bug
- COOK-3453 - ssh_known_hosts cookbook ruby block executes on every chef run
v1.1.0
[COOK-3765] - support ssh-keyscan using an alternative port number
v1.0.2
Bug
-
COOK-3113 - Use empty string when result is
nil
v1.0.0
This is a major release because it requires a server that supports the partial search feature.
- Chef Software Hosted Chef
- Chef Software Private Chef
- Open Source Chef 11
Improvement
- [COOK-830]: uses an inordinate amount of RAM when running exception handlers
v0.7.4
- [COOK-2440] -
ssh_known_hostsfails to use data bag entries, doesn't grab items
v0.7.2
- [COOK-2364] - Wrong LWRP name used in recipe
v0.7.0
- [COOK-2320] - Merge
known_hostLWRP intossh_known_hosts
v0.6.0
- [COOK-2268] - Allow to run with chef-solo
v0.5.0
- [COOK-1077] - allow adding arbitrary host keys from a data bag
v0.4.0
- COOK-493: include fqdn
- COOK-721: corrected permissions
Collaborator Number Metric
3.0.0 passed this metric
Foodcritic Metric
3.0.0 failed this metric
FC003: Check whether you are running with chef server before using server-specific features: /tmp/450c241d6680317cc22eef8d/ssh_known_hosts/libraries/helpers.rb:18
3.0.0 passed this metric
3.0.0 failed this metric
FC003: Check whether you are running with chef server before using server-specific features: /tmp/450c241d6680317cc22eef8d/ssh_known_hosts/libraries/helpers.rb:18
