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Remove logic to handle if UID is blank

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This should only have been triggered by tests, and those should now be fixed.
I tested by calling panic() if UID was blank in BuildDockerName() or if number
of fields was < 5 in ParseDockerName().  All errors were fixed.
This commit is contained in:
Tim Hockin
2015-01-09 17:19:31 -08:00
parent 905514a12b
commit 0d92da6b15
4 changed files with 87 additions and 88 deletions
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67
pkg/kubelet/dockertools/docker.go
View File

@@ -547,26 +547,17 @@ func HashContainer(container *api.Container) uint64 {
// Creates a name which can be reversed to identify both full pod name and container name.
func BuildDockerName(podUID, podFullName string, container *api.Container) string {
containerName := container.Name + "." + strconv.FormatUint(HashContainer(container), 16)
// Note, manifest.ID could be blank.
if len(podUID) == 0 {
return fmt.Sprintf("%s_%s_%s_%08x",
containerNamePrefix,
containerName,
podFullName,
rand.Uint32())
} else {
return fmt.Sprintf("%s_%s_%s_%s_%08x",
containerNamePrefix,
containerName,
podFullName,
podUID,
rand.Uint32())
}
return fmt.Sprintf("%s_%s_%s_%s_%08x",
containerNamePrefix,
containerName,
podFullName,
podUID,
rand.Uint32())
}
// Unpacks a container name, returning the pod full name and container name we would have used to
// construct the docker name. If the docker name isn't the one we created, we may return empty strings.
func ParseDockerName(name string) (podFullName, uuid, containerName string, hash uint64) {
func ParseDockerName(name string) (podFullName, podUID, containerName string, hash uint64) {
// For some reason docker appears to be appending '/' to names.
// If it's there, strip it.
if name[0] == '/' {
@@ -576,29 +567,31 @@ func ParseDockerName(name string) (podFullName, uuid, containerName string, hash
if len(parts) == 0 || parts[0] != containerNamePrefix {
return
}
if len(parts) > 1 {
pieces := strings.Split(parts[1], ".")
containerName = pieces[0]
if len(pieces) > 1 {
var err error
hash, err = strconv.ParseUint(pieces[1], 16, 32)
if err != nil {
glog.Warningf("invalid container hash: %s", pieces[1])
}
if len(parts) < 5 {
// We have at least 5 fields. We may have more in the future.
// Anything with less fields than this is not something we can
// manage.
glog.Warningf("found a container with the %q prefix, but too few fields (%d): ", containerNamePrefix, len(parts), name)
return
}
// Container name.
nameParts := strings.Split(parts[1], ".")
containerName = nameParts[0]
if len(nameParts) > 1 {
var err error
hash, err = strconv.ParseUint(nameParts[1], 16, 32)
if err != nil {
glog.Warningf("invalid container hash: %s", nameParts[1])
}
}
if len(parts) > 2 {
podFullName = parts[2]
}
// This is not an off-by-one. We check for > 4 here because (sadly) the
// format generated by BuildDockerName() has an optional field in the
// middle. If len(parts) > 3, parts[3] might be the optional field or
// the (poorly documented) random suffix. If len(parts) > 4, then we
// know [3] is the UUID and [4] is the suffix. Sort of pukey, should
// be fixed by making UID non-optional.
if len(parts) > 4 {
uuid = parts[3]
}
// Pod fullname.
podFullName = parts[2]
// Pod UID.
podUID = parts[3]
return
}

28
pkg/kubelet/dockertools/docker_test.go
View File

@@ -53,11 +53,11 @@ func TestGetContainerID(t *testing.T) {
fakeDocker.ContainerList = []docker.APIContainers{
{
ID: "foobar",
Names: []string{"/k8s_foo_qux_1234"},
Names: []string{"/k8s_foo_qux_1234_42"},
},
{
ID: "barbar",
Names: []string{"/k8s_bar_qux_2565"},
Names: []string{"/k8s_bar_qux_2565_42"},
},
}
fakeDocker.Container = &docker.Container{
@@ -99,27 +99,23 @@ func verifyPackUnpack(t *testing.T, podNamespace, podUID, podName, containerName
}
func TestContainerManifestNaming(t *testing.T) {
podUID := "d1b925c9-444a-11e4-a576-42010af0a203"
verifyPackUnpack(t, "file", podUID, "manifest1234", "container5678")
verifyPackUnpack(t, "file", podUID, "mani-fest-1234", "container5678")
podUID := "12345678"
verifyPackUnpack(t, "file", podUID, "name", "container")
verifyPackUnpack(t, "file", podUID, "name-with-dashes", "container")
// UID is same as pod name
verifyPackUnpack(t, "file", podUID, podUID, "container123")
// empty namespace
verifyPackUnpack(t, "", podUID, podUID, "container123")
// No UID
verifyPackUnpack(t, "other", "", podUID, "container456")
verifyPackUnpack(t, "file", podUID, podUID, "container")
// No Container name
verifyPackUnpack(t, "other", "", podUID, "")
verifyPackUnpack(t, "other", podUID, "name", "")
container := &api.Container{Name: "container"}
podName := "foo"
podNamespace := "test"
name := fmt.Sprintf("k8s_%s_%s.%s_12345", container.Name, podName, podNamespace)
name := fmt.Sprintf("k8s_%s_%s.%s_%s_42", container.Name, podName, podNamespace, podUID)
podFullName := fmt.Sprintf("%s.%s", podName, podNamespace)
returnedPodFullName, _, returnedContainerName, hash := ParseDockerName(name)
if returnedPodFullName != podFullName || returnedContainerName != container.Name || hash != 0 {
t.Errorf("unexpected parse: %s %s %d", returnedPodFullName, returnedContainerName, hash)
returnedPodFullName, returnedPodUID, returnedContainerName, hash := ParseDockerName(name)
if returnedPodFullName != podFullName || returnedPodUID != podUID || returnedContainerName != container.Name || hash != 0 {
t.Errorf("unexpected parse: %s %s %s %d", returnedPodFullName, returnedPodUID, returnedContainerName, hash)
}
}