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README.txt
= Bring Your Own Nodes to the jclouds ComputeService =
The bring your own node provider (byon) allows you to specify a source which jclouds will read
nodes from. Using this, you can have jclouds control your standalone machines, or even cloud
hosts that are sitting idle.
== Constraints ==
The byon provider only supports the following functions of ComputeService:
* listNodes
* listNodesDetailsMatching
* getNodeMetadata
* runScriptOnNodesMatching
== How to use the byon provider ==
The byon provider requires you supply a list of nodes using a property. Here are
the valid properties you can use:
* byon.endpoint - url to access the list, can be http://, file://, classpath://
* byon.nodes - inline defined yaml in string form.
Note:
The identity and credential fields of the ComputeServiceContextFactory are ignored.
=== Java example ===
Properties props = new Properties();
// if you built the yaml string by hand
props.setProperty("byon.nodes", stringLiteral);
// or you can specify an external reference
props.setProperty("byon.endpoint", "file://path/to/byon.yaml");
// or you can specify a file in your classpath
props.setProperty("byon.endpoint", "classpath:///byon.yaml");
context = new ComputeServiceContextFactory().createContext("byon", "foo", "bar",
ImmutableSet.<Module> of(new JschSshClientModule()), props);
== File format ==
You must define your nodes in yaml, and they must be in a collection called nodes.
Here are the properties:
* id - opaque unique id
* name - optional; user specified name
* description - optional; long description of this node
* note this is not yet in jclouds NodeMetadata
* hostname - name or ip address to contact the node on
* location_id - optional; correlates to a ZONE-scoped Location
* note that if present for one node, must be present for all
* os_arch - ex. x86
* os_family - must conform to org.jclouds.compute.domain.OsFamily in lower-hyphen format
ex. rhel, ubuntu, centos, debian, amzn-linux
* os_description - long description of the os ex. Ubuntu with lamp stack
* os_version - normalized to numbers when possible. ex. for centos: 5.3, ubuntu: 10.10
* login_port - optional; alternate port for ssh access
* group - primary group of the machine. ex. hadoop
* tags - optional; list of arbitrary tags.
* note this list is not yet in jclouds NodeMetadata
* username - primary login user. ex. ubuntu, vcloud, toor, root
* sudo_password - optional; when a script is run with the "runAsRoot" option true, yet the
username is not root, a sudo command is invoked. If sudo_password
is set, the contents will be passed to sudo -S.
Ex. echo 'foobar'| sudo -S init 5
one of:
* credential - RSA private key or password
* credential_url - location of plain-text RSA private key or password.
ex. file:///home/me/.ssh/id_rsa
classpath:///id_rsa
Note that username and credentials are optional if a CredentialStoreModule is configured in
jclouds.
=== Example File ===
nodes:
- id: i-sdfkjh7
name: cluster-1
description: accounting analytics cluster
hostname: cluster-1.mydomain.com
location_id: virginia
os_arch: x86
os_family: rhel
os_description: redhat with CDH
os_version: 5.3
group: hadoop
tags:
- vanilla
username: myUser
credential: |
-----BEGIN RSA PRIVATE KEY-----
MIIEowIBAAKCAQEAuzaE6azgUxwESX1rCGdJ5xpdrc1XC311bOGZBCE8NA+CpFh2
u01Vfv68NC4u6LFgdXSY1vQt6hiA5TNqQk0TyVfFAunbXgTekF6XqDPQUf1nq9aZ
lMvo4vlaLDKBkhG5HJE/pIa0iB+RMZLS0GhxsIWerEDmYdHKM25o
-----END RSA PRIVATE KEY-----
sudo_password: go panthers!