Avoid looking up instance id until we need it

currently kube-controller-manager cannot run outside of a vm started
by openstack (with --cloud-provider=openstack params). We try to read
the instance id from the metadata provider or the config drive or the
file location only when we really need it. In the normal scenario, the
controller-manager uses the node name to get the instance id.
41541910e1/pkg/volume/cinder/attacher.go (L149)

The localInstanceID is currently used only in the test case, so let
us not read it until it is really needed.
This commit is contained in:
Davanum Srinivas 2017-07-20 08:10:17 -04:00
parent 2853f46b02
commit 6139f9ab89
3 changed files with 19 additions and 13 deletions

View File

@ -280,18 +280,12 @@ func newOpenStack(cfg Config) (*OpenStack, error) {
return nil, err
}
id, err := readInstanceID()
if err != nil {
return nil, err
}
os := OpenStack{
provider: provider,
region: cfg.Global.Region,
lbOpts: cfg.LoadBalancer,
bsOpts: cfg.BlockStorage,
routeOpts: cfg.Route,
localInstanceID: id,
provider: provider,
region: cfg.Global.Region,
lbOpts: cfg.LoadBalancer,
bsOpts: cfg.BlockStorage,
routeOpts: cfg.Route,
}
err = checkOpenStackOpts(&os)

View File

@ -143,6 +143,13 @@ func (i *Instances) ExternalID(name types.NodeName) (string, error) {
// InstanceID returns the kubelet's cloud provider ID.
func (os *OpenStack) InstanceID() (string, error) {
if len(os.localInstanceID) == 0 {
id, err := readInstanceID()
if err != nil {
return "", err
}
os.localInstanceID = id
}
return os.localInstanceID, nil
}

View File

@ -473,7 +473,12 @@ func TestVolumes(t *testing.T) {
WaitForVolumeStatus(t, os, vol, volumeAvailableStatus)
diskId, err := os.AttachDisk(os.localInstanceID, vol)
id, err := os.InstanceID()
if err != nil {
t.Fatalf("Cannot find instance id: %v", err)
}
diskId, err := os.AttachDisk(id, vol)
if err != nil {
t.Fatalf("Cannot AttachDisk Cinder volume %s: %v", vol, err)
}
@ -487,7 +492,7 @@ func TestVolumes(t *testing.T) {
}
t.Logf("Volume (%s) found at path: %s\n", vol, devicePath)
err = os.DetachDisk(os.localInstanceID, vol)
err = os.DetachDisk(id, vol)
if err != nil {
t.Fatalf("Cannot DetachDisk Cinder volume %s: %v", vol, err)
}