// deleteInstances deletes a virtual machine and all of the resources that
// it owns, and any corresponding network security rules.
func deleteInstance(
inst *azureInstance,
computeClient compute.ManagementClient,
networkClient network.ManagementClient,
storageClient internalazurestorage.Client,
) error {
vmName := string(inst.Id())
vmClient := compute.VirtualMachinesClient{computeClient}
nicClient := network.InterfacesClient{networkClient}
nsgClient := network.SecurityGroupsClient{networkClient}
securityRuleClient := network.SecurityRulesClient{networkClient}
publicIPClient := network.PublicIPAddressesClient{networkClient}
logger.Debugf("deleting instance %q", vmName)
logger.Debugf("- deleting virtual machine")
deleteResult, err := vmClient.Delete(inst.env.resourceGroup, vmName)
if err != nil {
if deleteResult.Response == nil || deleteResult.StatusCode != http.StatusNotFound {
return errors.Annotate(err, "deleting virtual machine")
}
}
// Delete the VM's OS disk VHD.
logger.Debugf("- deleting OS VHD")
blobClient := storageClient.GetBlobService()
if _, err := blobClient.DeleteBlobIfExists(osDiskVHDContainer, vmName); err != nil {
return errors.Annotate(err, "deleting OS VHD")
}
// Delete network security rules that refer to the VM.
logger.Debugf("- deleting security rules")
if err := deleteInstanceNetworkSecurityRules(
inst.env.resourceGroup, inst.Id(), nsgClient, securityRuleClient,
); err != nil {
return errors.Annotate(err, "deleting network security rules")
}
// Detach public IPs from NICs. This must be done before public
// IPs can be deleted. In the future, VMs may not necessarily
// have a public IP, so we don't use the presence of a public
// IP to indicate the existence of an instance.
logger.Debugf("- detaching public IP addresses")
for _, nic := range inst.networkInterfaces {
if nic.Properties.IPConfigurations == nil {
continue
}
var detached bool
for i, ipConfiguration := range *nic.Properties.IPConfigurations {
if ipConfiguration.Properties.PublicIPAddress == nil {
continue
}
ipConfiguration.Properties.PublicIPAddress = nil
(*nic.Properties.IPConfigurations)[i] = ipConfiguration
detached = true
}
if detached {
if _, err := nicClient.CreateOrUpdate(
inst.env.resourceGroup, to.String(nic.Name), nic,
); err != nil {
return errors.Annotate(err, "detaching public IP addresses")
}
}
}
// Delete public IPs.
logger.Debugf("- deleting public IPs")
for _, pip := range inst.publicIPAddresses {
pipName := to.String(pip.Name)
logger.Tracef("deleting public IP %q", pipName)
result, err := publicIPClient.Delete(inst.env.resourceGroup, pipName)
if err != nil {
if result.Response == nil || result.StatusCode != http.StatusNotFound {
return errors.Annotate(err, "deleting public IP")
}
}
}
// Delete NICs.
//
// NOTE(axw) this *must* be deleted last, or we risk leaking resources.
logger.Debugf("- deleting network interfaces")
for _, nic := range inst.networkInterfaces {
nicName := to.String(nic.Name)
logger.Tracef("deleting NIC %q", nicName)
result, err := nicClient.Delete(inst.env.resourceGroup, nicName)
if err != nil {
if result.Response == nil || result.StatusCode != http.StatusNotFound {
return errors.Annotate(err, "deleting NIC")
}
}
}
return nil
}
