// Index returns a list of items that match on the index function
// Index is thread-safe so long as you treat all items as immutable
func (c *threadSafeMap) Index(indexName string, obj interface{}) ([]interface{}, error) {
c.lock.RLock()
defer c.lock.RUnlock()
indexFunc := c.indexers[indexName]
if indexFunc == nil {
return nil, fmt.Errorf("Index with name %s does not exist", indexName)
}
indexKeys, err := indexFunc(obj)
if err != nil {
return nil, err
}
index := c.indices[indexName]
// need to de-dupe the return list. Since multiple keys are allowed, this can happen.
returnKeySet := sets.String{}
for _, indexKey := range indexKeys {
set := index[indexKey]
for _, key := range set.List() {
returnKeySet.Insert(key)
}
}
list := make([]interface{}, 0, returnKeySet.Len())
for absoluteKey := range returnKeySet {
list = append(list, c.items[absoluteKey])
}
return list, nil
}
func (t *tcShaper) nextClassID() (int, error) {
data, err := t.e.Command("tc", "class", "show", "dev", t.iface).CombinedOutput()
if err != nil {
return -1, err
}
scanner := bufio.NewScanner(bytes.NewBuffer(data))
classes := sets.String{}
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text())
// skip empty lines
if len(line) == 0 {
continue
}
parts := strings.Split(line, " ")
// expected tc line:
// class htb 1:1 root prio 0 rate 1000Kbit ceil 1000Kbit burst 1600b cburst 1600b
if len(parts) != 14 {
return -1, fmt.Errorf("unexpected output from tc: %s (%v)", scanner.Text(), parts)
}
classes.Insert(parts[2])
}
// Make sure it doesn't go forever
for nextClass := 1; nextClass < 10000; nextClass++ {
if !classes.Has(fmt.Sprintf("1:%d", nextClass)) {
return nextClass, nil
}
}
// This should really never happen
return -1, fmt.Errorf("exhausted class space, please try again")
}
// NegotiateVersion queries the server's supported api versions to find
// a version that both client and server support.
// - If no version is provided, try registered client versions in order of
// preference.
// - If version is provided, but not default config (explicitly requested via
// commandline flag), and is unsupported by the server, print a warning to
// stderr and try client's registered versions in order of preference.
// - If version is config default, and the server does not support it,
// return an error.
func NegotiateVersion(client *Client, c *Config, version string, clientRegisteredVersions []string) (string, error) {
var err error
if client == nil {
client, err = New(c)
if err != nil {
return "", err
}
}
clientVersions := sets.String{}
for _, v := range clientRegisteredVersions {
clientVersions.Insert(v)
}
apiVersions, err := client.ServerAPIVersions()
if err != nil {
return "", fmt.Errorf("couldn't read version from server: %v", err)
}
serverVersions := sets.String{}
for _, v := range apiVersions.Versions {
serverVersions.Insert(v)
}
// If no version requested, use config version (may also be empty).
if len(version) == 0 {
version = c.Version
}
// If version explicitly requested verify that both client and server support it.
// If server does not support warn, but try to negotiate a lower version.
if len(version) != 0 {
if !clientVersions.Has(version) {
return "", fmt.Errorf("Client does not support API version '%s'. Client supported API versions: %v", version, clientVersions)
}
if serverVersions.Has(version) {
return version, nil
}
// If we are using an explicit config version the server does not support, fail.
if version == c.Version {
return "", fmt.Errorf("Server does not support API version '%s'.", version)
}
}
for _, clientVersion := range clientRegisteredVersions {
if serverVersions.Has(clientVersion) {
// Version was not explicitly requested in command config (--api-version).
// Ok to fall back to a supported version with a warning.
// TODO: caesarxuchao: enable the warning message when we have
// proper fix. Please refer to issue #14895.
// if len(version) != 0 {
// glog.Warningf("Server does not support API version '%s'. Falling back to '%s'.", version, clientVersion)
// }
return clientVersion, nil
}
}
return "", fmt.Errorf("Failed to negotiate an api version. Server supports: %v. Client supports: %v.",
serverVersions, clientRegisteredVersions)
}
func ValidateThirdPartyResource(obj *extensions.ThirdPartyResource) errs.ValidationErrorList {
allErrs := errs.ValidationErrorList{}
if len(obj.Name) == 0 {
allErrs = append(allErrs, errs.NewFieldInvalid("name", obj.Name, "name must be non-empty"))
}
versions := sets.String{}
for ix := range obj.Versions {
version := &obj.Versions[ix]
if len(version.Name) == 0 {
allErrs = append(allErrs, errs.NewFieldInvalid("name", version, "name can not be empty"))
}
if versions.Has(version.Name) {
allErrs = append(allErrs, errs.NewFieldDuplicate("version", version))
}
versions.Insert(version.Name)
}
return allErrs
}