cloudinit

package
v0.0.0-...-732aecd Latest Latest
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 Go to latest Published: Jun 10, 2014 License: AGPL-3.0 Imports: 6 Imported by: 0

Documentation

Overview

The cloudinit package implements a way of creating a cloud-init configuration file. See https://help.ubuntu.com/community/CloudInit.

Index

Examples

Constants

View Source 
const CloudToolsPrefsPath = "/etc/apt/preferences.d/50-cloud-tools"

CloudToolsPrefsPath defines the default location of apt_preferences(5) file for the cloud-tools pocket.

Variables

This section is empty.

Functions

func InitProgressCmd 

func InitProgressCmd() string

InitProgressCmd will return a command to initialise progress reporting, sending messages to stderr. If LogProgressCmd is used in a script, InitProgressCmd MUST be executed beforehand.

The returned command is idempotent; this is important, to allow a script to be embedded in another with stderr redirected, in which case InitProgressCmd must precede the redirection.

func LogProgressCmd 

func LogProgressCmd(format string, args ...interface{}) string

LogProgressCmd will return a command to log the specified progress message to stderr; the resultant command should be added to the configuration as a runcmd or bootcmd as appropriate.

If there are any uses of LogProgressCmd in a configuration, the configuration MUST precede the command with the result of InitProgressCmd.

Types

type AptPreferences 

type AptPreferences struct {
	Path        string
	Explanation string
	Package     string
	Pin         string
	PinPriority int
}

AptPreferences is a set of apt_preferences(5) compatible preferences for an apt source. It can be used to override the default priority for the source. Path where the file will be created (usually in /etc/apt/preferences.d/).

func (*AptPreferences) FileContents 

func (prefs *AptPreferences) FileContents() string

FileContents generates an apt_preferences(5) file from the fields in prefs.

type AptSource 

type AptSource struct {
	Source string          `yaml:"source"`
	Key    string          `yaml:"key,omitempty"`
	Prefs  *AptPreferences `yaml:"-"`
}

AptSource is an apt(8) source, comprising a source location, with an optional Key, and optional apt_preferences(5).

type Config 

type Config struct {
	// contains filtered or unexported fields
}

Config represents a set of cloud-init configuration options.

Example

#cloud-config packages: - juju - ubuntu 

package main

import (
	"fmt"

	"github.com/juju/juju/cloudinit"
)

func main() {
	cfg := cloudinit.New()
	cfg.AddPackage("juju")
	cfg.AddPackage("ubuntu")
	data, err := cfg.Render()
	if err != nil {
		fmt.Printf("render error: %v", err)
		return
	}
	fmt.Printf("%s", data)
}

Output:

func New 

func New() *Config

New returns a new Config with no options set.

func (*Config) AddAptSource 

func (cfg *Config) AddAptSource(name, key string, prefs *AptPreferences)

AddAptSource adds an apt source. The key holds the public key of the source, in the form expected by apt-key(8).

func (*Config) AddBootCmd 

func (cfg *Config) AddBootCmd(cmd string)

AddBootCmd is like AddRunCmd except that the command will run very early in the boot process, and it will run on every boot, not just the first time.

func (*Config) AddBootCmdArgs 

func (cfg *Config) AddBootCmdArgs(args ...string)

AddBootCmdArgs is like AddBootCmd except that the command will be executed with the given arguments properly quoted.

func (*Config) AddFile 

func (cfg *Config) AddFile(filename, data string, mode uint)

AddFile will add multiple run_cmd entries to safely set the contents of a specific file to the requested contents.

func (*Config) AddMount 

func (cfg *Config) AddMount(args ...string)

AddMount adds a mount point. The given arguments will be used as a line in /etc/fstab.

func (*Config) AddPackage 

func (cfg *Config) AddPackage(name string)

AddPackage adds a package to be installed on first boot. If any packages are specified, "apt-get update" will be called.

func (*Config) AddPackageFromTargetRelease 

func (cfg *Config) AddPackageFromTargetRelease(packageName, targetRelease string)

AddPackageFromTargetRelease adds a package to be installed using the given release, passed to apt-get with the --target-release argument.

func (*Config) AddRunCmd 

func (cfg *Config) AddRunCmd(cmd string)

AddRunCmd adds a command to be executed at first boot. The command will be run by the shell with any metacharacters retaining their special meaning (that is, no quoting takes place).

func (*Config) AddRunCmdArgs 

func (cfg *Config) AddRunCmdArgs(args ...string)

AddRunCmdArgs is like AddRunCmd except that the command will be executed with the given arguments properly quoted.

func (*Config) AddSSHAuthorizedKeys 

func (cfg *Config) AddSSHAuthorizedKeys(keyData string)

AddSSHAuthorizedKeys adds a set of keys in ssh authorized_keys format (see ssh(8) for details) that will be added to ~/.ssh/authorized_keys for the configured user (see SetUser).

func (*Config) AddSSHKey 

func (cfg *Config) AddSSHKey(keyType SSHKeyType, keyData string)

AddSSHKey adds a pre-generated ssh key to the server keyring. Keys that are added like this will be written to /etc/ssh and new random keys will not be generated.

func (*Config) AddScripts 

func (cfg *Config) AddScripts(scripts ...string)

AddScripts is a simple shorthand for calling AddRunCmd multiple times.

func (*Config) AptSources 

func (cfg *Config) AptSources() []*AptSource

AptSources returns the apt sources added with AddAptSource.

func (*Config) AptUpdate 

func (cfg *Config) AptUpdate() bool

AptUpdate returns the value set by SetAptUpdate, or false if no call to SetAptUpdate has been made.

func (*Config) AptUpgrade 

func (cfg *Config) AptUpgrade() bool

AptUpgrade returns the value set by SetAptUpgrade, or false if no call to SetAptUpgrade has been made.

func (*Config) BootCmds 

func (cfg *Config) BootCmds() []interface{}

BootCmds returns a list of commands added with AddBootCmd*.

Each element in the resultant slice is either a string or []string, corresponding to how the command was added.

func (*Config) Output 

func (cfg *Config) Output(kind OutputKind) (stdout, stderr string)

Output returns the output destination passed to SetOutput for the specified output kind.

func (*Config) Packages 

func (cfg *Config) Packages() []string

Packages returns a list of packages that will be installed on first boot.

func (*Config) Render 

func (cfg *Config) Render() ([]byte, error)

Render returns the cloud-init configuration as a YAML file.

func (*Config) RunCmds 

func (cfg *Config) RunCmds() []interface{}

RunCmds returns a list of commands that will be run at first boot.

Each element in the resultant slice is either a string or []string, corresponding to how the command was added.

func (*Config) SetAptMirror 

func (cfg *Config) SetAptMirror(url string)

SetAptMirror sets the URL to be used as the apt mirror site. If not set, the URL is selected based on cloud metadata in EC2 - <region>.archive.ubuntu.com

func (*Config) SetAptPreserveSourcesList 

func (cfg *Config) SetAptPreserveSourcesList(yes bool)

SetAptPreserveSourcesList sets whether /etc/apt/sources.list is overwritten by the mirror. If true, SetAptMirror above will have no effect.

func (*Config) SetAptProxy 

func (cfg *Config) SetAptProxy(url string)

SetAptProxy sets the URL to be used as the apt proxy.

func (*Config) SetAptUpdate 

func (cfg *Config) SetAptUpdate(yes bool)

SetAptUpdate sets whether cloud-init runs "apt-get update" on first boot.

func (*Config) SetAptUpgrade 

func (cfg *Config) SetAptUpgrade(yes bool)

SetAptUpgrade sets whether cloud-init runs "apt-get upgrade" on first boot.

func (*Config) SetAttr 

func (cfg *Config) SetAttr(name string, value interface{})

SetAttr sets an arbitrary attribute in the cloudinit config. If value is nil the attribute will be deleted; otherwise the value will be marshalled according to the rules of the goyaml Marshal function.

func (*Config) SetDebconfSelections 

func (cfg *Config) SetDebconfSelections(answers string)

SetDebconfSelections provides preseeded debconf answers for the boot process. The given answers will be used as input to debconf-set-selections(1).

func (*Config) SetDisableEC2Metadata 

func (cfg *Config) SetDisableEC2Metadata(yes bool)

SetDisableEC2Metadata sets whether access to the EC2 metadata service is disabled early in boot via a null route ( route del -host 169.254.169.254 reject).

func (*Config) SetDisableRoot 

func (cfg *Config) SetDisableRoot(disable bool)

SetDisableRoot sets whether ssh login is disabled to the root account via the ssh authorized key associated with the instance metadata. It is true by default.

func (*Config) SetFinalMessage 

func (cfg *Config) SetFinalMessage(msg string)

SetFinalMessage sets to message that will be written when the system has finished booting for the first time. By default, the message is: "cloud-init boot finished at $TIMESTAMP. Up $UPTIME seconds".

func (*Config) SetLocale 

func (cfg *Config) SetLocale(locale string)

SetLocale sets the locale; it defaults to en_US.UTF-8.

func (*Config) SetOutput 

func (cfg *Config) SetOutput(kind OutputKind, stdout, stderr string)

SetOutput specifies destination for command output. Valid values for the kind "init", "config", "final" and "all". Each of stdout and stderr can take one of the following forms: 

>>file
    appends to file
>file
    overwrites file
|command
    pipes to the given command.

func (*Config) SetUser 

func (cfg *Config) SetUser(user string)

SetUser sets the user name that will be used for some other options. The user will be assumed to already exist in the machine image. The default user is "ubuntu".

type OutputKind 

type OutputKind string

OutputKind represents a destination for command output. 

const (
	OutInit   OutputKind = "init"
	OutConfig OutputKind = "config"
	OutFinal  OutputKind = "final"
	OutAll    OutputKind = "all"
)

type SSHKeyType 

type SSHKeyType string
const (
	RSAPrivate SSHKeyType = "rsa_private"
	RSAPublic  SSHKeyType = "rsa_public"
	DSAPrivate SSHKeyType = "dsa_private"
	DSAPublic  SSHKeyType = "dsa_public"
)

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