// Validate returns an error if the TargetInfo contains bad data. Nil
// is returned otherwise.
func (info *TargetInfo) Validate() error {
if !names.IsValidModel(info.ControllerTag.Id()) {
return errors.NotValidf("ControllerTag")
}
if len(info.Addrs) < 1 {
return errors.NotValidf("empty Addrs")
}
for _, addr := range info.Addrs {
_, err := network.ParseHostPort(addr)
if err != nil {
return errors.NotValidf("%q in Addrs", addr)
}
}
if info.CACert == "" {
return errors.NotValidf("empty CACert")
}
if info.AuthTag.Id() == "" {
return errors.NotValidf("empty AuthTag")
}
if info.Password == "" && len(info.Macaroons) == 0 {
return errors.NotValidf("missing Password & Macaroons")
}
return nil
}
// WaitForAgentInitialisation polls the bootstrapped controller with a read-only
// command which will fail until the controller is fully initialised.
// TODO(wallyworld) - add a bespoke command to maybe the admin facade for this purpose.
func WaitForAgentInitialisation(ctx *cmd.Context, c *modelcmd.ModelCommandBase, controllerName, hostedModelName string) error {
// TODO(katco): 2016-08-09: lp:1611427
attempts := utils.AttemptStrategy{
Min: bootstrapReadyPollCount,
Delay: bootstrapReadyPollDelay,
}
var (
apiAttempts int
err error
)
// Make a best effort to find the new controller address so we can print it.
addressInfo := ""
controller, err := c.ClientStore().ControllerByName(controllerName)
if err == nil && len(controller.APIEndpoints) > 0 {
addr, err := network.ParseHostPort(controller.APIEndpoints[0])
if err == nil {
addressInfo = fmt.Sprintf(" at %s", addr.Address.Value)
}
}
ctx.Infof("Contacting Juju controller%s to verify accessibility...", addressInfo)
apiAttempts = 1
for attempt := attempts.Start(); attempt.Next(); apiAttempts++ {
err = tryAPI(c)
if err == nil {
ctx.Infof("Bootstrap complete, %q controller now available.", controllerName)
ctx.Infof("Controller machines are in the %q model.", bootstrap.ControllerModelName)
ctx.Infof("Initial model %q added.", hostedModelName)
break
}
// As the API server is coming up, it goes through a number of steps.
// Initially the upgrade steps run, but the api server allows some
// calls to be processed during the upgrade, but not the list blocks.
// Logins are also blocked during space discovery.
// It is also possible that the underlying database causes connections
// to be dropped as it is initialising, or reconfiguring. These can
// lead to EOF or "connection is shut down" error messages. We skip
// these too, hoping that things come back up before the end of the
// retry poll count.
errorMessage := errors.Cause(err).Error()
switch {
case errors.Cause(err) == io.EOF,
strings.HasSuffix(errorMessage, "connection is shut down"),
strings.HasSuffix(errorMessage, "no api connection available"),
strings.Contains(errorMessage, "spaces are still being discovered"):
ctx.Verbosef("Still waiting for API to become available")
continue
case params.ErrCode(err) == params.CodeUpgradeInProgress:
ctx.Verbosef("Still waiting for API to become available: %v", err)
continue
}
break
}
return errors.Annotatef(err, "unable to contact api server after %d attempts", apiAttempts)
}