traefik/provider/ecs/config.go
2018-01-03 23:52:03 +01:00

377 lines
15 KiB
Go

package ecs
import (
"math"
"strconv"
"strings"
"text/template"
"github.com/BurntSushi/ty/fun"
"github.com/containous/traefik/log"
"github.com/containous/traefik/provider/label"
"github.com/containous/traefik/types"
)
// buildConfiguration fills the config template with the given instances
func (p *Provider) buildConfiguration(services map[string][]ecsInstance) (*types.Configuration, error) {
var ecsFuncMap = template.FuncMap{
// Backend functions
"getProtocol": getFuncStringValue(label.TraefikProtocol, label.DefaultProtocol),
"getHost": getHost,
"getPort": getPort,
"getWeight": getFuncStringValue(label.TraefikWeight, label.DefaultWeight),
"hasLoadBalancerLabel": hasLoadBalancerLabel,
"getLoadBalancerMethod": getFuncFirstStringValue(label.TraefikBackendLoadBalancerMethod, label.DefaultBackendLoadBalancerMethod),
"getSticky": getSticky,
"hasStickinessLabel": getFuncFirstBoolValue(label.TraefikBackendLoadBalancerStickiness, false),
"getStickinessCookieName": getFuncFirstStringValue(label.TraefikBackendLoadBalancerStickinessCookieName, label.DefaultBackendLoadbalancerStickinessCookieName),
"hasHealthCheckLabels": hasFuncFirst(label.TraefikBackendHealthCheckPath),
"getHealthCheckPath": getFuncFirstStringValue(label.TraefikBackendHealthCheckPath, ""),
"getHealthCheckPort": getFuncFirstIntValue(label.TraefikBackendHealthCheckPort, label.DefaultBackendHealthCheckPort),
"getHealthCheckInterval": getFuncFirstStringValue(label.TraefikBackendHealthCheckInterval, ""),
"hasCircuitBreakerLabel": hasFuncFirst(label.TraefikBackendCircuitBreakerExpression),
"getCircuitBreakerExpression": getFuncFirstStringValue(label.TraefikBackendCircuitBreakerExpression, label.DefaultCircuitBreakerExpression),
"hasMaxConnLabels": hasMaxConnLabels,
"getMaxConnAmount": getFuncFirstInt64Value(label.TraefikBackendMaxConnAmount, math.MaxInt64),
"getMaxConnExtractorFunc": getFuncFirstStringValue(label.TraefikBackendMaxConnExtractorFunc, label.DefaultBackendMaxconnExtractorFunc),
// Frontend functions
"filterFrontends": filterFrontends,
"getFrontendRule": p.getFrontendRule,
"getPassHostHeader": getFuncStringValue(label.TraefikFrontendPassHostHeader, label.DefaultPassHostHeader),
"getPassTLSCert": getFuncBoolValue(label.TraefikFrontendPassTLSCert, label.DefaultPassTLSCert),
"getPriority": getFuncStringValue(label.TraefikFrontendPriority, label.DefaultFrontendPriority),
"getBasicAuth": getFuncSliceString(label.TraefikFrontendAuthBasic),
"getEntryPoints": getFuncSliceString(label.TraefikFrontendEntryPoints),
"getWhitelistSourceRange": getFuncSliceString(label.TraefikFrontendWhitelistSourceRange),
"hasRedirect": hasRedirect,
"getRedirectEntryPoint": getFuncStringValue(label.TraefikFrontendRedirectEntryPoint, label.DefaultFrontendRedirectEntryPoint),
"getRedirectRegex": getFuncStringValue(label.TraefikFrontendRedirectRegex, ""),
"getRedirectReplacement": getFuncStringValue(label.TraefikFrontendRedirectReplacement, ""),
"hasErrorPages": hasPrefixFuncLabel(label.Prefix + label.BaseFrontendErrorPage),
"getErrorPages": getErrorPages,
"hasRateLimits": hasFuncLabel(label.TraefikFrontendRateLimitExtractorFunc),
"getRateLimitsExtractorFunc": getFuncStringValue(label.TraefikFrontendRateLimitExtractorFunc, ""),
"getRateLimits": getRateLimits,
// Headers
"hasRequestHeaders": hasFuncLabel(label.TraefikFrontendRequestHeaders),
"getRequestHeaders": getFuncMapValue(label.TraefikFrontendRequestHeaders),
"hasResponseHeaders": hasFuncLabel(label.TraefikFrontendResponseHeaders),
"getResponseHeaders": getFuncMapValue(label.TraefikFrontendResponseHeaders),
"hasAllowedHostsHeaders": hasFuncLabel(label.TraefikFrontendAllowedHosts),
"getAllowedHostsHeaders": getFuncSliceString(label.TraefikFrontendAllowedHosts),
"hasHostsProxyHeaders": hasFuncLabel(label.TraefikFrontendHostsProxyHeaders),
"getHostsProxyHeaders": getFuncSliceString(label.TraefikFrontendHostsProxyHeaders),
"hasSSLRedirectHeaders": hasFuncLabel(label.TraefikFrontendSSLRedirect),
"getSSLRedirectHeaders": getFuncBoolValue(label.TraefikFrontendSSLRedirect, false),
"hasSSLTemporaryRedirectHeaders": hasFuncLabel(label.TraefikFrontendSSLTemporaryRedirect),
"getSSLTemporaryRedirectHeaders": getFuncBoolValue(label.TraefikFrontendSSLTemporaryRedirect, false),
"hasSSLHostHeaders": hasFuncLabel(label.TraefikFrontendSSLHost),
"getSSLHostHeaders": getFuncStringValue(label.TraefikFrontendSSLHost, ""),
"hasSSLProxyHeaders": hasFuncLabel(label.TraefikFrontendSSLProxyHeaders),
"getSSLProxyHeaders": getFuncMapValue(label.TraefikFrontendSSLProxyHeaders),
"hasSTSSecondsHeaders": hasFuncLabel(label.TraefikFrontendSTSSeconds),
"getSTSSecondsHeaders": getFuncInt64Value(label.TraefikFrontendSTSSeconds, 0),
"hasSTSIncludeSubdomainsHeaders": hasFuncLabel(label.TraefikFrontendSTSIncludeSubdomains),
"getSTSIncludeSubdomainsHeaders": getFuncBoolValue(label.TraefikFrontendSTSIncludeSubdomains, false),
"hasSTSPreloadHeaders": hasFuncLabel(label.TraefikFrontendSTSPreload),
"getSTSPreloadHeaders": getFuncBoolValue(label.TraefikFrontendSTSPreload, false),
"hasForceSTSHeaderHeaders": hasFuncLabel(label.TraefikFrontendForceSTSHeader),
"getForceSTSHeaderHeaders": getFuncBoolValue(label.TraefikFrontendForceSTSHeader, false),
"hasFrameDenyHeaders": hasFuncLabel(label.TraefikFrontendFrameDeny),
"getFrameDenyHeaders": getFuncBoolValue(label.TraefikFrontendFrameDeny, false),
"hasCustomFrameOptionsValueHeaders": hasFuncLabel(label.TraefikFrontendCustomFrameOptionsValue),
"getCustomFrameOptionsValueHeaders": getFuncStringValue(label.TraefikFrontendCustomFrameOptionsValue, ""),
"hasContentTypeNosniffHeaders": hasFuncLabel(label.TraefikFrontendContentTypeNosniff),
"getContentTypeNosniffHeaders": getFuncBoolValue(label.TraefikFrontendContentTypeNosniff, false),
"hasBrowserXSSFilterHeaders": hasFuncLabel(label.TraefikFrontendBrowserXSSFilter),
"getBrowserXSSFilterHeaders": getFuncBoolValue(label.TraefikFrontendBrowserXSSFilter, false),
"hasContentSecurityPolicyHeaders": hasFuncLabel(label.TraefikFrontendContentSecurityPolicy),
"getContentSecurityPolicyHeaders": getFuncStringValue(label.TraefikFrontendContentSecurityPolicy, ""),
"hasPublicKeyHeaders": hasFuncLabel(label.TraefikFrontendPublicKey),
"getPublicKeyHeaders": getFuncStringValue(label.TraefikFrontendPublicKey, ""),
"hasReferrerPolicyHeaders": hasFuncLabel(label.TraefikFrontendReferrerPolicy),
"getReferrerPolicyHeaders": getFuncStringValue(label.TraefikFrontendReferrerPolicy, ""),
"hasIsDevelopmentHeaders": hasFuncLabel(label.TraefikFrontendIsDevelopment),
"getIsDevelopmentHeaders": getFuncBoolValue(label.TraefikFrontendIsDevelopment, false),
}
return p.GetConfiguration("templates/ecs.tmpl", ecsFuncMap, struct {
Services map[string][]ecsInstance
}{
services,
})
}
func (p *Provider) getFrontendRule(i ecsInstance) string {
defaultRule := "Host:" + strings.ToLower(strings.Replace(i.Name, "_", "-", -1)) + "." + p.Domain
return getStringValue(i, label.TraefikFrontendRule, defaultRule)
}
// TODO: Deprecated
// Deprecated replaced by Stickiness
func getSticky(instances []ecsInstance) string {
if hasFirst(instances, label.TraefikBackendLoadBalancerSticky) {
log.Warnf("Deprecated configuration found: %s. Please use %s.", label.TraefikBackendLoadBalancerSticky, label.TraefikBackendLoadBalancerStickiness)
}
return getFirstStringValue(instances, label.TraefikBackendLoadBalancerSticky, "false")
}
func getHost(i ecsInstance) string {
return *i.machine.PrivateIpAddress
}
func getPort(i ecsInstance) string {
if value := getStringValue(i, label.TraefikPort, ""); len(value) > 0 {
return value
}
return strconv.FormatInt(*i.container.NetworkBindings[0].HostPort, 10)
}
func filterFrontends(instances []ecsInstance) []ecsInstance {
byName := make(map[string]struct{})
return fun.Filter(func(i ecsInstance) bool {
_, found := byName[i.Name]
if !found {
byName[i.Name] = struct{}{}
}
return !found
}, instances).([]ecsInstance)
}
func hasLoadBalancerLabel(instances []ecsInstance) bool {
method := hasFirst(instances, label.TraefikBackendLoadBalancerMethod)
sticky := hasFirst(instances, label.TraefikBackendLoadBalancerSticky)
stickiness := hasFirst(instances, label.TraefikBackendLoadBalancerStickiness)
cookieName := hasFirst(instances, label.TraefikBackendLoadBalancerStickinessCookieName)
return method || sticky || stickiness || cookieName
}
func hasMaxConnLabels(instances []ecsInstance) bool {
mca := hasFirst(instances, label.TraefikBackendMaxConnAmount)
mcef := hasFirst(instances, label.TraefikBackendMaxConnExtractorFunc)
return mca && mcef
}
func hasRedirect(instance ecsInstance) bool {
return hasLabel(instance, label.TraefikFrontendRedirectEntryPoint) ||
hasLabel(instance, label.TraefikFrontendRedirectRegex) && hasLabel(instance, label.TraefikFrontendRedirectReplacement)
}
func getErrorPages(instance ecsInstance) map[string]*types.ErrorPage {
labels := mapPToMap(instance.containerDefinition.DockerLabels)
prefix := label.Prefix + label.BaseFrontendErrorPage
return label.ParseErrorPages(labels, prefix, label.RegexpFrontendErrorPage)
}
func getRateLimits(instance ecsInstance) map[string]*types.Rate {
labels := mapPToMap(instance.containerDefinition.DockerLabels)
prefix := label.Prefix + label.BaseFrontendRateLimit
return label.ParseRateSets(labels, prefix, label.RegexpFrontendRateLimit)
}
// Label functions
func hasFuncLabel(labelName string) func(i ecsInstance) bool {
return func(i ecsInstance) bool {
return hasLabel(i, labelName)
}
}
func hasPrefixFuncLabel(prefix string) func(i ecsInstance) bool {
return func(i ecsInstance) bool {
return hasPrefix(i, prefix)
}
}
func getFuncStringValue(labelName string, defaultValue string) func(i ecsInstance) string {
return func(i ecsInstance) string {
return getStringValue(i, labelName, defaultValue)
}
}
func getFuncBoolValue(labelName string, defaultValue bool) func(i ecsInstance) bool {
return func(i ecsInstance) bool {
return getBoolValue(i, labelName, defaultValue)
}
}
func getFuncInt64Value(labelName string, defaultValue int64) func(i ecsInstance) int64 {
return func(i ecsInstance) int64 {
return getInt64Value(i, labelName, defaultValue)
}
}
func getFuncSliceString(labelName string) func(i ecsInstance) []string {
return func(i ecsInstance) []string {
return getSliceString(i, labelName)
}
}
func getFuncMapValue(labelName string) func(i ecsInstance) map[string]string {
return func(i ecsInstance) map[string]string {
return getMapString(i, labelName)
}
}
func hasFuncFirst(labelName string) func(instances []ecsInstance) bool {
return func(instances []ecsInstance) bool {
return hasFirst(instances, labelName)
}
}
func getFuncFirstStringValue(labelName string, defaultValue string) func(instances []ecsInstance) string {
return func(instances []ecsInstance) string {
return getFirstStringValue(instances, labelName, defaultValue)
}
}
func getFuncFirstIntValue(labelName string, defaultValue int) func(instances []ecsInstance) int {
return func(instances []ecsInstance) int {
if len(instances) < 0 {
return defaultValue
}
return getIntValue(instances[0], labelName, defaultValue)
}
}
func getFuncFirstInt64Value(labelName string, defaultValue int64) func(instances []ecsInstance) int64 {
return func(instances []ecsInstance) int64 {
if len(instances) < 0 {
return defaultValue
}
return getInt64Value(instances[0], labelName, defaultValue)
}
}
func getFuncFirstBoolValue(labelName string, defaultValue bool) func(instances []ecsInstance) bool {
return func(instances []ecsInstance) bool {
if len(instances) < 0 {
return defaultValue
}
return getBoolValue(instances[0], labelName, defaultValue)
}
}
func hasLabel(i ecsInstance, labelName string) bool {
value, ok := i.containerDefinition.DockerLabels[labelName]
return ok && value != nil && len(*value) > 0
}
func hasPrefix(i ecsInstance, prefix string) bool {
for name, value := range i.containerDefinition.DockerLabels {
if strings.HasPrefix(name, prefix) && value != nil && len(*value) > 0 {
return true
}
}
return false
}
func getStringValue(i ecsInstance, labelName string, defaultValue string) string {
if v, ok := i.containerDefinition.DockerLabels[labelName]; ok {
if v == nil {
return defaultValue
}
if len(*v) == 0 {
return defaultValue
}
return *v
}
return defaultValue
}
func getBoolValue(i ecsInstance, labelName string, defaultValue bool) bool {
rawValue, ok := i.containerDefinition.DockerLabels[labelName]
if ok {
if rawValue != nil {
v, err := strconv.ParseBool(*rawValue)
if err == nil {
return v
}
}
}
return defaultValue
}
func getIntValue(i ecsInstance, labelName string, defaultValue int) int {
rawValue, ok := i.containerDefinition.DockerLabels[labelName]
if ok {
if rawValue != nil {
v, err := strconv.Atoi(*rawValue)
if err == nil {
return v
}
}
}
return defaultValue
}
func getInt64Value(i ecsInstance, labelName string, defaultValue int64) int64 {
rawValue, ok := i.containerDefinition.DockerLabels[labelName]
if ok {
if rawValue != nil {
v, err := strconv.ParseInt(*rawValue, 10, 64)
if err == nil {
return v
}
}
}
return defaultValue
}
func getSliceString(i ecsInstance, labelName string) []string {
if value, ok := i.containerDefinition.DockerLabels[labelName]; ok {
if value == nil {
return nil
}
if len(*value) == 0 {
return nil
}
return label.SplitAndTrimString(*value, ",")
}
return nil
}
func getMapString(i ecsInstance, labelName string) map[string]string {
if value, ok := i.containerDefinition.DockerLabels[labelName]; ok {
if value == nil {
return nil
}
if len(*value) == 0 {
return nil
}
return label.ParseMapValue(labelName, *value)
}
return nil
}
func hasFirst(instances []ecsInstance, labelName string) bool {
if len(instances) == 0 {
return false
}
return hasLabel(instances[0], labelName)
}
func getFirstStringValue(instances []ecsInstance, labelName string, defaultValue string) string {
if len(instances) == 0 {
return defaultValue
}
return getStringValue(instances[0], labelName, defaultValue)
}
func mapPToMap(src map[string]*string) map[string]string {
result := make(map[string]string)
for key, value := range src {
if value != nil && len(*value) > 0 {
result[key] = *value
}
}
return result
}
func isEnabled(i ecsInstance, exposedByDefault bool) bool {
return getBoolValue(i, label.TraefikEnable, exposedByDefault)
}