agent

type APIHostPortsSetter struct {
	Agent
}

type Agent interface {

	// CurrentConfig returns a copy of the agent's configuration. No
	// guarantees regarding ongoing correctness are made.
	CurrentConfig() Config

	// ChangeConfig allows clients to change the agent's configuration
	// by supplying a callback that applies the changes.
	ChangeConfig(ConfigMutator) error
}

type AgentConfigParams struct {
	Paths             Paths
	Jobs              []multiwatcher.MachineJob
	UpgradedToVersion version.Number
	Tag               names.Tag
	Password          string
	Nonce             string
	Environment       names.EnvironTag
	StateAddresses    []string
	APIAddresses      []string
	CACert            string
	Values            map[string]string
	PreferIPv6        bool
}

type BootstrapMachineConfig struct {
	// Addresses holds the bootstrap machine's addresses.
	Addresses []network.Address

	// Constraints holds the bootstrap machine's constraints.
	// This value is also used for the environment-level constraints.
	Constraints constraints.Value

	// Jobs holds the jobs that the machine agent will run.
	Jobs []multiwatcher.MachineJob

	// InstanceId holds the instance id of the bootstrap machine.
	InstanceId instance.Id

	// Characteristics holds hardware information on the
	// bootstrap machine.
	Characteristics instance.HardwareCharacteristics

	// SharedSecret is the Mongo replica set shared secret (keyfile).
	SharedSecret string
}

type Config interface {
	// DataDir returns the data directory. Each agent has a subdirectory
	// containing the configuration files.
	DataDir() string

	// LogDir returns the log directory. All logs from all agents on
	// the machine are written to this directory.
	LogDir() string

	// SystemIdentityPath returns the path of the file where the environment
	// SSH key is kept.
	SystemIdentityPath() string

	// Jobs returns a list of MachineJobs that need to run.
	Jobs() []multiwatcher.MachineJob

	// Tag returns the tag of the entity on whose behalf the state connection
	// will be made.
	Tag() names.Tag

	// Dir returns the agent's directory.
	Dir() string

	// Nonce returns the nonce saved when the machine was provisioned
	// TODO: make this one of the key/value pairs.
	Nonce() string

	// CACert returns the CA certificate that is used to validate the state or
	// API server's certificate.
	CACert() string

	// APIAddresses returns the addresses needed to connect to the api server
	APIAddresses() ([]string, error)

	// WriteCommands returns shell commands to write the agent configuration.
	// It returns an error if the configuration does not have all the right
	// elements.
	WriteCommands(renderer shell.Renderer) ([]string, error)

	// StateServingInfo returns the details needed to run
	// a state server and reports whether those details
	// are available
	StateServingInfo() (params.StateServingInfo, bool)

	// APIInfo returns details for connecting to the API server.
	APIInfo() *api.Info

	// MongoInfo returns details for connecting to the state server's mongo
	// database and reports whether those details are available
	MongoInfo() (*mongo.MongoInfo, bool)

	// OldPassword returns the fallback password when connecting to the
	// API server.
	OldPassword() string

	// UpgradedToVersion returns the version for which all upgrade steps have been
	// successfully run, which is also the same as the initially deployed version.
	UpgradedToVersion() version.Number

	// Value returns the value associated with the key, or an empty string if
	// the key is not found.
	Value(key string) string

	// PreferIPv6 returns whether to prefer using IPv6 addresses (if
	// available) when connecting to the state or API server.
	PreferIPv6() bool

	// Environment returns the tag for the environment that the agent belongs
	// to.
	Environment() names.EnvironTag

	// MetricsSpoolDir returns the spool directory where workloads store
	// collected metrics.
	MetricsSpoolDir() string
}

type ConfigMutator func(ConfigSetter) error

type ConfigSetter interface {
	Config
	// contains filtered or unexported methods
}

type ConfigSetterWriter interface {
	Config

	ConfigWriter
	// contains filtered or unexported methods
}

type ConfigWriter interface {
	// Write writes the agent configuration.
	Write() error
}

type MigrateParams struct {
	Paths        Paths
	Jobs         []multiwatcher.MachineJob
	DeleteValues []string
	Values       map[string]string
	Environment  names.EnvironTag
}

type Paths struct {
	// DataDir is the data directory where each agent has a subdirectory
	// containing the configuration files.
	DataDir string
	// LogDir is the log directory where all logs from all agents on
	// the machine are written.
	LogDir string
	// MetricsSpoolDir is the spool directory where workloads store
	// collected metrics.
	MetricsSpoolDir string
	// ConfDir is the directory where all  config file for
	// Juju agents are stored.
	ConfDir string
}

type StateServingInfoSetter struct {
	Agent
}