Changes between Version 6 and Version 7 of GENIExperimenter/Tutorials/GENIExperimentEngine/DesignSetup

Timestamp:

03/16/15 12:32:29 (9 years ago)

Author:

acb@cs.princeton.edu

Comment:

--

GENIExperimenter/Tutorials/GENIExperimentEngine/DesignSetup

@@ -46 +46 @@
 Two basic concepts in Ansible are ''inventories'' and ''modules''.  An inventory is a list of hosts to be managed by Ansible, organized into groups.  When you run Ansible commands, either from the command-line or in a playbook, you specify the host group that the command should operate on.  In this way Ansible commands can operate on many hosts in parallel.  Take a look at the Ansible inventory in your '''ansible-hosts''' file.  This is basically the equivalent of the '''ssh-config''' except its specialized for Ansible.
 
-A command consists of a module and some arguments for the module.  A module provides a declarative abstraction on top of standard shell commands.  So for example, in the shell on an Ubuntu machine you might install package “foo” like this:
+A ''task'' in Ansible consists of a module and some arguments for the module.  A module provides a declarative abstraction on top of standard shell commands.  So for example, in the shell on an Ubuntu machine you might install package “foo” like this:
 
 {{{
@@ -53 +53 @@
 }}}
 
-An equivalent Ansible command in a playbook would look like:
+An equivalent Ansible task in a playbook would look like:
 
 {{{
-apt: name=foo state=latest update_cache=yes 
+- apt: name=foo state=latest update_cache=yes 
 }}}
 
-Or the same Ansible command could be invoked directly on the command line like this:
+Or the same Ansible task could be invoked directly on the command line like this:
 
 {{{
@@ -65 +65 @@
 }}}
 
-The command uses the '''apt''' module, and tells Ansible: “Make sure the latest version of package foo is installed”.  There are many other modules which are well-documented at http://docs.ansible.com. 
+The task uses the '''apt''' module, and tells Ansible: “Make sure the latest version of package foo is installed”.  There are many other modules which are well-documented at http://docs.ansible.com. 
 
 == 4. Configure the Ansible controller for your slicelet ==