github.com/makyo/juju@v0.0.0-20160425123129-2608902037e9/provider/vsphere/environ_instance.go (about)

     1  // Copyright 2015 Canonical Ltd.
     2  // Licensed under the AGPLv3, see LICENCE file for details.
     3  
     4  // +build !gccgo
     5  
     6  package vsphere
     7  
     8  import (
     9  	"strings"
    10  
    11  	"github.com/juju/errors"
    12  
    13  	"github.com/juju/juju/environs"
    14  	"github.com/juju/juju/instance"
    15  	"github.com/juju/juju/provider/common"
    16  )
    17  
    18  // Instances returns the available instances in the environment that
    19  // match the provided instance IDs. For IDs that did not match any
    20  // instances, the result at the corresponding index will be nil. In that
    21  // case the error will be environs.ErrPartialInstances (or
    22  // ErrNoInstances if none of the IDs match an instance).
    23  func (env *environ) Instances(ids []instance.Id) ([]instance.Instance, error) {
    24  	if len(ids) == 0 {
    25  		return nil, environs.ErrNoInstances
    26  	}
    27  
    28  	instances, err := env.instances()
    29  	if err != nil {
    30  		// We don't return the error since we need to pack one instance
    31  		// for each ID into the result. If there is a problem then we
    32  		// will return either ErrPartialInstances or ErrNoInstances.
    33  		// TODO(ericsnow) Skip returning here only for certain errors?
    34  		logger.Errorf("failed to get instances from vmware: %v", err)
    35  		err = errors.Trace(err)
    36  	}
    37  
    38  	// Build the result, matching the provided instance IDs.
    39  	numFound := 0 // This will never be greater than len(ids).
    40  	results := make([]instance.Instance, len(ids))
    41  	for i, id := range ids {
    42  		inst := findInst(id, instances)
    43  		if inst != nil {
    44  			numFound++
    45  		}
    46  		results[i] = inst
    47  	}
    48  
    49  	if numFound == 0 {
    50  		if err == nil {
    51  			err = environs.ErrNoInstances
    52  		}
    53  	} else if numFound != len(ids) {
    54  		err = environs.ErrPartialInstances
    55  	}
    56  	return results, err
    57  }
    58  
    59  // instances returns a list of all "alive" instances in the environment.
    60  // This means only instances where the IDs match
    61  // "juju-<env name>-machine-*". This is important because otherwise juju
    62  // will see they are not tracked in state, assume they're stale/rogue,
    63  // and shut them down.
    64  func (env *environ) instances() ([]instance.Instance, error) {
    65  	prefix := common.MachineFullName(env.Config().UUID(), "")
    66  	instances, err := env.client.Instances(prefix)
    67  	err = errors.Trace(err)
    68  
    69  	// Turn mo.VirtualMachine values into *environInstance values,
    70  	// whether or not we got an error.
    71  	var results []instance.Instance
    72  	for _, base := range instances {
    73  		inst := newInstance(base, env)
    74  		results = append(results, inst)
    75  	}
    76  
    77  	return results, err
    78  }
    79  
    80  // ControllerInstances returns the IDs of the instances corresponding
    81  // to juju controllers.
    82  func (env *environ) ControllerInstances() ([]instance.Id, error) {
    83  	prefix := common.MachineFullName(env.Config().ControllerUUID(), "")
    84  	instances, err := env.client.Instances(prefix)
    85  	if err != nil {
    86  		return nil, errors.Trace(err)
    87  	}
    88  
    89  	var results []instance.Id
    90  	for _, inst := range instances {
    91  		metadata := inst.Config.ExtraConfig
    92  		for _, item := range metadata {
    93  			value := item.GetOptionValue()
    94  			if value.Key == metadataKeyIsState && value.Value == metadataValueIsState {
    95  				results = append(results, instance.Id(inst.Name))
    96  				break
    97  			}
    98  		}
    99  	}
   100  	if len(results) == 0 {
   101  		return nil, environs.ErrNotBootstrapped
   102  	}
   103  	return results, nil
   104  }
   105  
   106  // parsePlacement extracts the availability zone from the placement
   107  // string and returns it. If no zone is found there then an error is
   108  // returned.
   109  func (env *environ) parsePlacement(placement string) (*vmwareAvailZone, error) {
   110  	if placement == "" {
   111  		return nil, nil
   112  	}
   113  
   114  	pos := strings.IndexRune(placement, '=')
   115  	if pos == -1 {
   116  		return nil, errors.Errorf("unknown placement directive: %v", placement)
   117  	}
   118  
   119  	switch key, value := placement[:pos], placement[pos+1:]; key {
   120  	case "zone":
   121  		zone, err := env.availZone(value)
   122  		if err != nil {
   123  			return nil, errors.Trace(err)
   124  		}
   125  		return zone, nil
   126  	}
   127  	return nil, errors.Errorf("unknown placement directive: %v", placement)
   128  }