// createInstance creates all of the Azure entities necessary for a
// new instance. This includes Cloud Service, Deployment and Role.
//
// If serviceName is non-empty, then createInstance will assign to
// the Cloud Service with that name. Otherwise, a new Cloud Service
// will be created.
func (env *azureEnviron) createInstance(azure *gwacl.ManagementAPI, role *gwacl.Role, serviceName string, stateServer bool) (resultInst instance.Instance, resultErr error) {
var inst instance.Instance
defer func() {
if inst != nil && resultErr != nil {
if err := env.StopInstances(inst.Id()); err != nil {
// Failure upon failure. Log it, but return the original error.
logger.Errorf("error releasing failed instance: %v", err)
}
}
}()
var err error
var service *gwacl.HostedService
if serviceName != "" {
logger.Debugf("creating instance in existing cloud service %q", serviceName)
service, err = azure.GetHostedServiceProperties(serviceName, true)
} else {
logger.Debugf("creating instance in new cloud service")
// If we're creating a cloud service for state servers,
// we will want to open additional ports. We need to
// record this against the cloud service, so we use a
// special label for the purpose.
var label string
if stateServer {
label = stateServerLabel
}
service, err = newHostedService(azure, env.getEnvPrefix(), env.getAffinityGroupName(), label)
}
if err != nil {
return nil, err
}
if len(service.Deployments) == 0 {
// This is a newly created cloud service, so we
// should destroy it if anything below fails.
defer func() {
if resultErr != nil {
azure.DeleteHostedService(service.ServiceName)
// Destroying the hosted service destroys the instance,
// so ensure StopInstances isn't called.
inst = nil
}
}()
// Create an initial deployment.
deployment := gwacl.NewDeploymentForCreateVMDeployment(
deploymentNameV2(service.ServiceName),
deploymentSlot,
deploymentNameV2(service.ServiceName),
[]gwacl.Role{*role},
env.getVirtualNetworkName(),
)
if err := azure.AddDeployment(deployment, service.ServiceName); err != nil {
return nil, errors.Annotate(err, "error creating VM deployment")
}
service.Deployments = append(service.Deployments, *deployment)
} else {
// Update the deployment.
deployment := &service.Deployments[0]
if err := azure.AddRole(&gwacl.AddRoleRequest{
ServiceName: service.ServiceName,
DeploymentName: deployment.Name,
PersistentVMRole: (*gwacl.PersistentVMRole)(role),
}); err != nil {
return nil, err
}
deployment.RoleList = append(deployment.RoleList, *role)
}
return env.getInstance(service, role.RoleName)
}
// newDeployment creates and returns a gwacl Deployment object.
func (env *azureEnviron) newDeployment(role *gwacl.Role, deploymentName string, deploymentLabel string, virtualNetworkName string) *gwacl.Deployment {
// Use the service name as the label for the deployment.
return gwacl.NewDeploymentForCreateVMDeployment(deploymentName, deploymentSlot, deploymentLabel, []gwacl.Role{*role}, virtualNetworkName)
}