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authorSol Jerome <solj@ices.utexas.edu>2010-02-01 02:28:39 +0000
committerSol Jerome <solj@ices.utexas.edu>2010-02-01 02:28:39 +0000
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Signed-off-by: Sol Jerome <solj@ices.utexas.edu> git-svn-id: https://svn.mcs.anl.gov/repos/bcfg/trunk/bcfg2@5709 ce84e21b-d406-0410-9b95-82705330c041
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+.. -*- mode: rst -*-
+
+.. _server-plugins-generators-sshbase:
+
+=======
+SSHbase
+=======
+
+SSHbase is a purpose build bcfg2 plugin for managing ssh host keys. It is responsible for making ssh keys persist beyond a client rebuild and building a proper ssh_known_hosts file, including a correct localhost record for the current system.
+
+It has two functions:
+
+* Generating new ssh keys -- When a client requests a dsa, rsa, or v1 key, and there is no existing key in the repository, one is generated.
+* Maintaining the ssh_known_hosts file -- all current known public keys (and extra public key stores) are integrated into a single ssh_known_hosts file, and a localhost record for the current client is added. The ssh_known_hosts file data is updated whenever any keys change, are added, or deleted.
+
+Interacting with SSHbase
+========================
+
+* Pre-seeding with existing keys -- Currently existing keys will be overwritten by new, sshbase-managed ones by default. Pre-existing keys can be added to the repository by putting them in <repo>/SSHbase/<key filename>.H_<hostname>
+* Pre-seeding can also be performed using bcfg2-admin pull ConfigFile /name/of/ssh/key
+* Revoking existing keys -- deleting <repo>/SSHbase/\*.H_<hostname> will remove keys for an existing client.
+
+Aliases
+=======
+
+SSHbase has support for Aliases listed in clients.xml. The address for the entries are specified either through DNS (e.g. a CNAME), or via the address attribute to the Alias.
+
+Getting started
+===============
+
+#. Add SSHbase to the generators line (plugins line in 1.0 or greater) in /etc/bcfg2.conf and restart the server -- This enables the SSHbase plugin in the bcfg2 server.
+#. Add Path entries for /etc/ssh/ssh_known_hosts, and /etc/ssh/ssh_host_dsa_key, etc to a bundle or base.
+#. Enjoy.
+
+At this point, SSHbase will generate new keys for any client without a recorded key in the repository, and will generate an ssh_known_hosts file appropriately.
+
+Blog post
+=========
+
+http://www.ducea.com/2008/08/24/using-the-bcfg2-sshbase-plugin/