Dynamic Configuration Refactoring
This commit is contained in:
Ludovic Fernandez
Traefiker Bot
parent
d3ae88f108
commit
a09dfa3ce1
452 changed files with 21023 additions and 9419 deletions
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@ -1,212 +0,0 @@
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package label
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import (
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"fmt"
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"net/http"
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"regexp"
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"strconv"
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"strings"
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"github.com/containous/traefik/log"
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)
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const (
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mapEntrySeparator = "||"
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mapValueSeparator = ":"
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)
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// Default values
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const (
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DefaultWeight = 1
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DefaultProtocol = "http"
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DefaultPassHostHeader = true
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DefaultPassTLSCert = false
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DefaultFrontendPriority = 0
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DefaultCircuitBreakerExpression = "NetworkErrorRatio() > 1"
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DefaultBackendLoadBalancerMethod = "wrr"
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DefaultBackendMaxconnExtractorFunc = "request.host"
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DefaultBackendLoadbalancerStickinessCookieName = ""
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DefaultBackendHealthCheckPort = 0
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)
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var (
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// RegexpFrontendErrorPage used to extract error pages from label
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RegexpFrontendErrorPage = regexp.MustCompile(`^traefik\.frontend\.errors\.(?P<name>[^ .]+)\.(?P<field>[^ .]+)$`)
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// RegexpFrontendRateLimit used to extract rate limits from label
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RegexpFrontendRateLimit = regexp.MustCompile(`^traefik\.frontend\.rateLimit\.rateSet\.(?P<name>[^ .]+)\.(?P<field>[^ .]+)$`)
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)
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// GetStringValue get string value associated to a label
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func GetStringValue(labels map[string]string, labelName string, defaultValue string) string {
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if value, ok := labels[labelName]; ok && len(value) > 0 {
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return value
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}
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return defaultValue
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}
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// GetBoolValue get bool value associated to a label
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func GetBoolValue(labels map[string]string, labelName string, defaultValue bool) bool {
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rawValue, ok := labels[labelName]
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if ok {
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v, err := strconv.ParseBool(rawValue)
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if err == nil {
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return v
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}
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log.Errorf("Unable to parse %q: %q, falling back to %v. %v", labelName, rawValue, defaultValue, err)
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}
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return defaultValue
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}
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// GetIntValue get int value associated to a label
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func GetIntValue(labels map[string]string, labelName string, defaultValue int) int {
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if rawValue, ok := labels[labelName]; ok {
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value, err := strconv.Atoi(rawValue)
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if err == nil {
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return value
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}
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log.Errorf("Unable to parse %q: %q, falling back to %v. %v", labelName, rawValue, defaultValue, err)
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}
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return defaultValue
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}
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// GetInt64Value get int64 value associated to a label
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func GetInt64Value(labels map[string]string, labelName string, defaultValue int64) int64 {
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if rawValue, ok := labels[labelName]; ok {
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value, err := strconv.ParseInt(rawValue, 10, 64)
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if err == nil {
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return value
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}
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log.Errorf("Unable to parse %q: %q, falling back to %v. %v", labelName, rawValue, defaultValue, err)
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}
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return defaultValue
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}
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// GetSliceStringValue get a slice of string associated to a label
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func GetSliceStringValue(labels map[string]string, labelName string) []string {
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var value []string
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if values, ok := labels[labelName]; ok {
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value = SplitAndTrimString(values, ",")
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if len(value) == 0 {
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log.Debugf("Could not load %q.", labelName)
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}
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}
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return value
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}
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// ParseMapValue get Map value for a label value
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func ParseMapValue(labelName, values string) map[string]string {
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mapValue := make(map[string]string)
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for _, parts := range strings.Split(values, mapEntrySeparator) {
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pair := strings.SplitN(parts, mapValueSeparator, 2)
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if len(pair) != 2 {
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log.Warnf("Could not load %q: %q, skipping...", labelName, parts)
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} else {
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mapValue[http.CanonicalHeaderKey(strings.TrimSpace(pair[0]))] = strings.TrimSpace(pair[1])
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}
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}
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if len(mapValue) == 0 {
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log.Errorf("Could not load %q, skipping...", labelName)
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return nil
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}
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return mapValue
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}
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// GetMapValue get Map value associated to a label
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func GetMapValue(labels map[string]string, labelName string) map[string]string {
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if values, ok := labels[labelName]; ok {
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if len(values) == 0 {
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log.Errorf("Missing value for %q, skipping...", labelName)
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return nil
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}
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return ParseMapValue(labelName, values)
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}
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return nil
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}
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// GetStringMultipleStrict get multiple string values associated to several labels
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// Fail if one label is missing
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func GetStringMultipleStrict(labels map[string]string, labelNames ...string) (map[string]string, error) {
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foundLabels := map[string]string{}
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for _, name := range labelNames {
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value := GetStringValue(labels, name, "")
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// Error out only if one of them is not defined.
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if len(value) == 0 {
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return nil, fmt.Errorf("label not found: %s", name)
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}
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foundLabels[name] = value
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}
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return foundLabels, nil
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}
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// Has Check if a value is associated to a label
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func Has(labels map[string]string, labelName string) bool {
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value, ok := labels[labelName]
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return ok && len(value) > 0
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}
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// HasPrefix Check if a value is associated to a less one label with a prefix
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func HasPrefix(labels map[string]string, prefix string) bool {
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for name, value := range labels {
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if strings.HasPrefix(name, prefix) && len(value) > 0 {
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return true
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}
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}
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return false
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}
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// IsEnabled Check if a container is enabled in Traefik
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func IsEnabled(labels map[string]string, exposedByDefault bool) bool {
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return GetBoolValue(labels, TraefikEnable, exposedByDefault)
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}
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// SplitAndTrimString splits separatedString at the separator character and trims each
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// piece, filtering out empty pieces. Returns the list of pieces or nil if the input
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// did not contain a non-empty piece.
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func SplitAndTrimString(base string, sep string) []string {
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var trimmedStrings []string
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for _, s := range strings.Split(base, sep) {
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s = strings.TrimSpace(s)
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if len(s) > 0 {
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trimmedStrings = append(trimmedStrings, s)
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}
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}
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return trimmedStrings
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}
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// GetFuncString a func related to GetStringValue
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func GetFuncString(labelName string, defaultValue string) func(map[string]string) string {
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return func(labels map[string]string) string {
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return GetStringValue(labels, labelName, defaultValue)
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}
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}
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// GetFuncInt a func related to GetIntValue
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func GetFuncInt(labelName string, defaultValue int) func(map[string]string) int {
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return func(labels map[string]string) int {
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return GetIntValue(labels, labelName, defaultValue)
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}
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}
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// GetFuncBool a func related to GetBoolValue
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func GetFuncBool(labelName string, defaultValue bool) func(map[string]string) bool {
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return func(labels map[string]string) bool {
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return GetBoolValue(labels, labelName, defaultValue)
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}
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}
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// GetFuncSliceString a func related to GetSliceStringValue
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func GetFuncSliceString(labelName string) func(map[string]string) []string {
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return func(labels map[string]string) []string {
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return GetSliceStringValue(labels, labelName)
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}
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}
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