coreos-cloudinit

command module
v1.7.0 Latest Latest
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Published: Oct 15, 2015 License: Apache-2.0 Imports: 24 Imported by: 0

README

coreos-cloudinit Build Status

coreos-cloudinit enables a user to customize CoreOS machines by providing either a cloud-config document or an executable script through user-data.

Configuration with cloud-config

A subset of the official cloud-config spec is implemented by coreos-cloudinit. Additionally, several CoreOS-specific options have been implemented to support interacting with unit files, bootstrapping etcd clusters, and more. All supported cloud-config parameters are documented here.

The following is an example cloud-config document:

#cloud-config

coreos:
    units:
      - name: etcd.service
        command: start

users:
  - name: core
    passwd: $1$allJZawX$00S5T756I5PGdQga5qhqv1

write_files:
  - path: /etc/resolv.conf
    content: |
        nameserver 192.0.2.2
        nameserver 192.0.2.3

Executing a Script

coreos-cloudinit supports executing user-data as a script instead of parsing it as a cloud-config document. Make sure the first line of your user-data is a shebang and coreos-cloudinit will attempt to execute it:

#!/bin/bash

echo 'Hello, world!'

user-data Field Substitution

coreos-cloudinit will replace the following set of tokens in your user-data with system-generated values.

Token Description
$public_ipv4 Public IPv4 address of machine
$private_ipv4 Private IPv4 address of machine

These values are determined by CoreOS based on the given provider on which your machine is running. Read more about provider-specific functionality in the CoreOS OEM documentation.

For example, submitting the following user-data...

#cloud-config
coreos:
    etcd:
        addr: $public_ipv4:4001
        peer-addr: $private_ipv4:7001

...will result in this cloud-config document being executed:

#cloud-config
coreos:
    etcd:
        addr: 203.0.113.29:4001
        peer-addr: 192.0.2.13:7001

Bugs

Please use the CoreOS issue tracker to report all bugs, issues, and feature requests.

Documentation

The Go Gopher

There is no documentation for this package.

Directories

Path Synopsis
Godeps
_workspace/src/github.com/cloudsigma/cepgo
Cepko implements easy-to-use communication with CloudSigma's VMs through a virtual serial port without bothering with formatting the messages properly nor parsing the output with the specific and sometimes confusing shell tools for that purpose.
Cepko implements easy-to-use communication with CloudSigma's VMs through a virtual serial port without bothering with formatting the messages properly nor parsing the output with the specific and sometimes confusing shell tools for that purpose.
_workspace/src/github.com/coreos/go-systemd/dbus
Integration with the systemd D-Bus API.
Integration with the systemd D-Bus API.
_workspace/src/github.com/coreos/yaml
Package yaml implements YAML support for the Go language.
Package yaml implements YAML support for the Go language.
_workspace/src/github.com/dotcloud/docker/pkg/netlink
Packet netlink provide access to low level Netlink sockets and messages.
Packet netlink provide access to low level Netlink sockets and messages.
_workspace/src/github.com/guelfey/go.dbus
Package dbus implements bindings to the D-Bus message bus system.
Package dbus implements bindings to the D-Bus message bus system.
_workspace/src/github.com/guelfey/go.dbus/introspect
Package introspect provides some utilities for dealing with the DBus introspection format.
Package introspect provides some utilities for dealing with the DBus introspection format.
_workspace/src/github.com/guelfey/go.dbus/prop
Package prop provides the Properties struct which can be used to implement org.freedesktop.DBus.Properties.
Package prop provides the Properties struct which can be used to implement org.freedesktop.DBus.Properties.
_workspace/src/github.com/tarm/goserial
Goserial is a simple go package to allow you to read and write from the serial port as a stream of bytes.
Goserial is a simple go package to allow you to read and write from the serial port as a stream of bytes.
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