// instances returns a mapping from the specified instance IDs to ec2.Instance
// structures. If any of the specified IDs does not refer to a running instance,
// it will cause an error to be returned.
func (v *ebsVolumeSource) instances(instIds []string) (map[string]ec2.Instance, error) {
instances := make(map[string]ec2.Instance)
// Can only attach to running instances.
filter := ec2.NewFilter()
filter.Add("instance-state-name", "running")
resp, err := v.ec2.Instances(instIds, filter)
if err != nil {
return nil, err
}
for j := range resp.Reservations {
r := &resp.Reservations[j]
for _, inst := range r.Instances {
instances[inst.InstanceId] = inst
}
}
// TODO(wallyworld) - retry to allow instances to get to running state.
if len(instances) < len(instIds) {
notRunning := set.NewStrings(instIds...)
for id, _ := range instances {
notRunning.Remove(id)
}
return nil, errors.Errorf(
"volumes can only be attached to running instances, these instances are not running: %v",
strings.Join(notRunning.Values(), ","),
)
}
return instances, nil
}
func (s *stubVPCAPIClient) CheckSingleRouteTablesCall(c *gc.C, vpc *ec2.VPC) {
var nilIDs []string
filter := ec2.NewFilter()
filter.Add("vpc-id", vpc.Id)
s.Stub.CheckCallNames(c, "RouteTables")
s.Stub.CheckCall(c, 0, "RouteTables", nilIDs, filter)
s.Stub.ResetCalls()
}
func (s *stubVPCAPIClient) CheckSingleInternetGatewaysCall(c *gc.C, vpc *ec2.VPC) {
var nilIDs []string
filter := ec2.NewFilter()
filter.Add("attachment.vpc-id", vpc.Id)
s.Stub.CheckCallNames(c, "InternetGateways")
s.Stub.CheckCall(c, 0, "InternetGateways", nilIDs, filter)
s.Stub.ResetCalls()
}
// ListVolumes is specified on the storage.VolumeSource interface.
func (v *ebsVolumeSource) ListVolumes() ([]string, error) {
filter := ec2.NewFilter()
filter.Add("tag:"+tags.JujuModel, v.modelUUID)
resp, err := v.ec2.Volumes(nil, filter)
if err != nil {
return nil, err
}
volumeIds := make([]string, len(resp.Volumes))
for i, vol := range resp.Volumes {
volumeIds[i] = vol.Id
}
return volumeIds, nil
}
func getVPCSubnets(apiClient vpcAPIClient, vpc *ec2.VPC) ([]ec2.Subnet, error) {
filter := ec2.NewFilter()
filter.Add("vpc-id", vpc.Id)
response, err := apiClient.Subnets(nil, filter)
if err != nil {
return nil, errors.Annotatef(err, "unexpected AWS response getting subnets of VPC %q", vpc.Id)
}
if len(response.Subnets) == 0 {
return nil, vpcNotUsablef(nil, "no subnets found for VPC %q", vpc.Id)
}
return response.Subnets, nil
}
func getVPCRouteTables(apiClient vpcAPIClient, vpc *ec2.VPC) ([]ec2.RouteTable, error) {
filter := ec2.NewFilter()
filter.Add("vpc-id", vpc.Id)
response, err := apiClient.RouteTables(nil, filter)
if err != nil {
return nil, errors.Annotatef(err, "unexpected AWS response getting route tables of VPC %q", vpc.Id)
}
if len(response.Tables) == 0 {
return nil, vpcNotRecommendedf("VPC has no route tables")
}
logger.Tracef("RouteTables() returned %#v", response)
return response.Tables, nil
}
func getVPCInternetGateway(apiClient vpcAPIClient, vpc *ec2.VPC) (*ec2.InternetGateway, error) {
filter := ec2.NewFilter()
filter.Add("attachment.vpc-id", vpc.Id)
response, err := apiClient.InternetGateways(nil, filter)
if err != nil {
return nil, errors.Annotatef(err, "unexpected AWS response getting Internet Gateway of VPC %q", vpc.Id)
}
if numResults := len(response.InternetGateways); numResults == 0 {
return nil, vpcNotRecommendedf("VPC has no Internet Gateway attached")
} else if numResults > 1 {
logger.Debugf("InternetGateways() returned %#v", response)
return nil, errors.Errorf("expected 1 result from AWS, got %d", numResults)
}
gateway := response.InternetGateways[0]
return &gateway, nil
}
func (c instanceCache) update(ec2client *ec2.EC2, ids ...string) error {
if len(ids) == 1 {
if _, ok := c[ids[0]]; ok {
return nil
}
}
filter := ec2.NewFilter()
filter.Add("instance-state-name", "running")
resp, err := ec2client.Instances(ids, filter)
if err != nil {
return errors.Annotate(err, "querying instance details")
}
for j := range resp.Reservations {
r := &resp.Reservations[j]
for _, inst := range r.Instances {
c[inst.InstanceId] = inst
}
}
return nil
}
