func (c *SSHCommon) hostFromTarget(target string) (string, error) {
// If the target is neither a machine nor a unit,
// assume it's a hostname and try it directly.
if !names.IsMachine(target) && !names.IsUnit(target) {
return target, nil
}
// A target may not initially have an address (e.g. the
// address updater hasn't yet run), so we must do this in
// a loop.
if _, err := c.ensureAPIClient(); err != nil {
return "", err
}
var err error
for a := sshHostFromTargetAttemptStrategy.Start(); a.Next(); {
var addr string
if c.proxy {
addr, err = c.apiClient.PrivateAddress(target)
} else {
addr, err = c.apiClient.PublicAddress(target)
}
if err == nil {
return addr, nil
}
}
return "", err
}
// PrivateAddress implements the server side of Client.PrivateAddress.
func (c *Client) PrivateAddress(p params.PrivateAddress) (results params.PrivateAddressResults, err error) {
switch {
case names.IsMachine(p.Target):
machine, err := c.api.state.Machine(p.Target)
if err != nil {
return results, err
}
addr := instance.SelectInternalAddress(machine.Addresses(), false)
if addr == "" {
return results, fmt.Errorf("machine %q has no internal address", machine)
}
return params.PrivateAddressResults{PrivateAddress: addr}, nil
case names.IsUnit(p.Target):
unit, err := c.api.state.Unit(p.Target)
if err != nil {
return results, err
}
addr, ok := unit.PrivateAddress()
if !ok {
return results, fmt.Errorf("unit %q has no internal address", unit)
}
return params.PrivateAddressResults{PrivateAddress: addr}, nil
}
return results, fmt.Errorf("unknown unit or machine %q", p.Target)
}
func (s *serviceSuite) TestServiceNameFormats(c *gc.C) {
assertService := func(s string, expect bool) {
c.Assert(names.IsService(s), gc.Equals, expect)
// Check that anything that is considered a valid service name
// is also (in)valid if a(n) (in)valid unit designator is added
// to it.
c.Assert(names.IsUnit(s+"/0"), gc.Equals, expect)
c.Assert(names.IsUnit(s+"/99"), gc.Equals, expect)
c.Assert(names.IsUnit(s+"/-1"), gc.Equals, false)
c.Assert(names.IsUnit(s+"/blah"), gc.Equals, false)
c.Assert(names.IsUnit(s+"/"), gc.Equals, false)
}
for i, test := range serviceNameTests {
c.Logf("test %d: %q", i, test.pattern)
assertService(test.pattern, test.valid)
}
}
// Unit returns the service's unit with name.
func (s *Service) Unit(name string) (*Unit, error) {
if !names.IsUnit(name) {
return nil, fmt.Errorf("%q is not a valid unit name", name)
}
udoc := &unitDoc{}
sel := bson.D{{"_id", name}, {"service", s.doc.Name}}
if err := s.st.units.Find(sel).One(udoc); err != nil {
return nil, fmt.Errorf("cannot get unit %q from service %q: %v", name, s.doc.Name, err)
}
return newUnit(s.st, udoc), nil
}
// Init initializes the command for running.
func (a *UnitAgent) Init(args []string) error {
if a.UnitName == "" {
return requiredError("unit-name")
}
if !names.IsUnit(a.UnitName) {
return fmt.Errorf(`--unit-name option expects "<service>/<n>" argument`)
}
if err := a.AgentConf.CheckArgs(args); err != nil {
return err
}
a.runner = worker.NewRunner(isFatal, moreImportant)
return nil
}
// Unit returns a unit by name.
func (st *State) Unit(name string) (*Unit, error) {
if !names.IsUnit(name) {
return nil, fmt.Errorf("%q is not a valid unit name", name)
}
doc := unitDoc{}
err := st.units.FindId(name).One(&doc)
if err == mgo.ErrNotFound {
return nil, errors.NotFoundf("unit %q", name)
}
if err != nil {
return nil, fmt.Errorf("cannot get unit %q: %v", name, err)
}
return newUnit(st, &doc), nil
}
// ReadSettings returns a map holding the settings of the unit with the
// supplied name within this relation. An error will be returned if the
// relation no longer exists, or if the unit's service is not part of the
// relation, or the settings are invalid; but mere non-existence of the
// unit is not grounds for an error, because the unit settings are
// guaranteed to persist for the lifetime of the relation, regardless
// of the lifetime of the unit.
func (ru *RelationUnit) ReadSettings(uname string) (m map[string]interface{}, err error) {
defer errors.Maskf(&err, "cannot read settings for unit %q in relation %q", uname, ru.relation)
if !names.IsUnit(uname) {
return nil, fmt.Errorf("%q is not a valid unit name", uname)
}
key, err := ru.key(uname)
if err != nil {
return nil, err
}
node, err := readSettings(ru.st, key)
if err != nil {
return nil, err
}
return node.Map(), nil
}
func (c *DestroyUnitCommand) Init(args []string) error {
if err := c.EnsureEnvName(); err != nil {
return err
}
c.UnitNames = args
if len(c.UnitNames) == 0 {
return errors.New("no units specified")
}
for _, name := range c.UnitNames {
if !names.IsUnit(name) {
return fmt.Errorf("invalid unit name %q", name)
}
}
return nil
}
func (c *ResolvedCommand) Init(args []string) error {
if err := c.EnvCommandBase.EnsureEnvName(); err != nil {
return err
}
if len(args) > 0 {
c.UnitName = args[0]
if !names.IsUnit(c.UnitName) {
return fmt.Errorf("invalid unit name %q", c.UnitName)
}
args = args[1:]
} else {
return fmt.Errorf("no unit specified")
}
return cmd.CheckEmpty(args)
}
func (c *RunCommand) Init(args []string) error {
if err := c.EnvCommandBase.EnsureEnvName(); err != nil {
return err
}
if len(args) == 0 {
return errors.New("no commands specified")
}
c.commands, args = args[0], args[1:]
if c.all {
if len(c.machines) != 0 {
return fmt.Errorf("You cannot specify --all and individual machines")
}
if len(c.services) != 0 {
return fmt.Errorf("You cannot specify --all and individual services")
}
if len(c.units) != 0 {
return fmt.Errorf("You cannot specify --all and individual units")
}
} else {
if len(c.machines) == 0 && len(c.services) == 0 && len(c.units) == 0 {
return fmt.Errorf("You must specify a target, either through --all, --machine, --service or --unit")
}
}
var nameErrors []string
for _, machineId := range c.machines {
if !names.IsMachine(machineId) {
nameErrors = append(nameErrors, fmt.Sprintf(" %q is not a valid machine id", machineId))
}
}
for _, service := range c.services {
if !names.IsService(service) {
nameErrors = append(nameErrors, fmt.Sprintf(" %q is not a valid service name", service))
}
}
for _, unit := range c.units {
if !names.IsUnit(unit) {
nameErrors = append(nameErrors, fmt.Sprintf(" %q is not a valid unit name", unit))
}
}
if len(nameErrors) > 0 {
return fmt.Errorf("The following run targets are not valid:\n%s",
strings.Join(nameErrors, "\n"))
}
return cmd.CheckEmpty(args)
}
func (ctx *SimpleContext) deployedUnitsUpstartJobs() (map[string]string, error) {
fis, err := ioutil.ReadDir(ctx.initDir)
if err != nil {
return nil, err
}
installed := make(map[string]string)
for _, fi := range fis {
if groups := deployedRe.FindStringSubmatch(fi.Name()); len(groups) == 4 {
unitName := groups[2] + "/" + groups[3]
if !names.IsUnit(unitName) {
continue
}
installed[unitName] = groups[1]
}
}
return installed, nil
}
func (c *DebugHooksCommand) Init(args []string) error {
if len(args) < 1 {
return errors.New("no unit name specified")
}
c.Target = args[0]
if !names.IsUnit(c.Target) {
return fmt.Errorf("%q is not a valid unit name", c.Target)
}
// If any of the hooks is "*", then debug all hooks.
c.hooks = append([]string{}, args[1:]...)
for _, h := range c.hooks {
if h == "*" {
c.hooks = nil
break
}
}
return nil
}
func (c *RunCommand) Init(args []string) error {
// make sure we aren't in an existing hook context
if contextId, err := getenv("JUJU_CONTEXT_ID"); err == nil && contextId != "" {
return fmt.Errorf("juju-run cannot be called from within a hook, have context %q", contextId)
}
if !c.noContext {
if len(args) < 1 {
return fmt.Errorf("missing unit-name")
}
c.unit, args = args[0], args[1:]
// If the command line param is a unit id (like service/2) we need to
// change it to the unit tag as that is the format of the agent directory
// on disk (unit-service-2).
if names.IsUnit(c.unit) {
c.unit = names.UnitTag(c.unit)
}
}
if len(args) < 1 {
return fmt.Errorf("missing commands")
}
c.commands, args = args[0], args[1:]
return cmd.CheckEmpty(args)
}
func (s *unitSuite) TestUnitNameFormats(c *gc.C) {
for i, test := range unitNameTests {
c.Logf("test %d: %q", i, test.pattern)
c.Assert(names.IsUnit(test.pattern), gc.Equals, test.valid)
}
}