472 lines
16 KiB
Go
472 lines
16 KiB
Go
package ecs
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import (
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"fmt"
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"math"
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"strconv"
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"strings"
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"text/template"
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"github.com/BurntSushi/ty/fun"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/containous/traefik/log"
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"github.com/containous/traefik/provider"
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"github.com/containous/traefik/provider/label"
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"github.com/containous/traefik/types"
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)
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// buildConfiguration fills the config template with the given instances
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func (p *Provider) buildConfiguration(services map[string][]ecsInstance) (*types.Configuration, error) {
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var ecsFuncMap = template.FuncMap{
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// Backend functions
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"getHost": getHost,
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"getPort": getPort,
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"getCircuitBreaker": getCircuitBreaker,
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"getLoadBalancer": getLoadBalancer,
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"getMaxConn": getMaxConn,
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"getHealthCheck": getHealthCheck,
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"getBuffering": getBuffering,
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"getServers": getServers,
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// TODO Deprecated [breaking]
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"getProtocol": getFuncStringValue(label.TraefikProtocol, label.DefaultProtocol),
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// TODO Deprecated [breaking]
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"getWeight": getFuncIntValue(label.TraefikWeight, label.DefaultWeightInt),
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// TODO Deprecated [breaking]
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"getLoadBalancerMethod": getFuncFirstStringValue(label.TraefikBackendLoadBalancerMethod, label.DefaultBackendLoadBalancerMethod),
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// TODO Deprecated [breaking]
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"getSticky": getSticky,
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// TODO Deprecated [breaking]
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"hasStickinessLabel": getFuncFirstBoolValue(label.TraefikBackendLoadBalancerStickiness, false),
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// TODO Deprecated [breaking]
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"getStickinessCookieName": getFuncFirstStringValue(label.TraefikBackendLoadBalancerStickinessCookieName, label.DefaultBackendLoadbalancerStickinessCookieName),
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// TODO Deprecated [breaking]
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"hasHealthCheckLabels": hasFuncFirst(label.TraefikBackendHealthCheckPath),
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// TODO Deprecated [breaking]
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"getHealthCheckPath": getFuncFirstStringValue(label.TraefikBackendHealthCheckPath, ""),
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// TODO Deprecated [breaking]
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"getHealthCheckInterval": getFuncFirstStringValue(label.TraefikBackendHealthCheckInterval, ""),
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// Frontend functions
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"filterFrontends": filterFrontends,
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"getFrontendRule": p.getFrontendRule,
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"getPassHostHeader": getFuncBoolValue(label.TraefikFrontendPassHostHeader, label.DefaultPassHostHeaderBool),
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"getPassTLSCert": getFuncBoolValue(label.TraefikFrontendPassTLSCert, label.DefaultPassTLSCert),
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"getPriority": getFuncIntValue(label.TraefikFrontendPriority, label.DefaultFrontendPriorityInt),
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"getBasicAuth": getFuncSliceString(label.TraefikFrontendAuthBasic),
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"getEntryPoints": getFuncSliceString(label.TraefikFrontendEntryPoints),
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"getWhitelistSourceRange": getFuncSliceString(label.TraefikFrontendWhitelistSourceRange),
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"getRedirect": getRedirect,
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"getErrorPages": getErrorPages,
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"getRateLimit": getRateLimit,
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"getHeaders": getHeaders,
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}
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return p.GetConfiguration("templates/ecs.tmpl", ecsFuncMap, struct {
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Services map[string][]ecsInstance
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}{
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Services: services,
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})
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}
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func (p *Provider) getFrontendRule(i ecsInstance) string {
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defaultRule := "Host:" + strings.ToLower(strings.Replace(i.Name, "_", "-", -1)) + "." + p.Domain
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return getStringValue(i, label.TraefikFrontendRule, defaultRule)
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}
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// TODO: Deprecated
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// replaced by Stickiness
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// Deprecated
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func getSticky(instances []ecsInstance) bool {
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if hasFirst(instances, label.TraefikBackendLoadBalancerSticky) {
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log.Warnf("Deprecated configuration found: %s. Please use %s.", label.TraefikBackendLoadBalancerSticky, label.TraefikBackendLoadBalancerStickiness)
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}
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return getFirstBoolValue(instances, label.TraefikBackendLoadBalancerSticky, false)
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}
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// TODO: Deprecated
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// replaced by Stickiness
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// Deprecated
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func getStickyOne(instance ecsInstance) bool {
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if hasLabel(instance, label.TraefikBackendLoadBalancerSticky) {
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log.Warnf("Deprecated configuration found: %s. Please use %s.", label.TraefikBackendLoadBalancerSticky, label.TraefikBackendLoadBalancerStickiness)
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}
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return getBoolValue(instance, label.TraefikBackendLoadBalancerSticky, false)
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}
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func getHost(i ecsInstance) string {
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return aws.StringValue(i.machine.PrivateIpAddress)
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}
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func getPort(i ecsInstance) string {
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if value := getStringValue(i, label.TraefikPort, ""); len(value) > 0 {
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return value
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}
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return strconv.FormatInt(aws.Int64Value(i.container.NetworkBindings[0].HostPort), 10)
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}
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func filterFrontends(instances []ecsInstance) []ecsInstance {
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byName := make(map[string]struct{})
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return fun.Filter(func(i ecsInstance) bool {
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_, found := byName[i.Name]
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if !found {
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byName[i.Name] = struct{}{}
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}
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return !found
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}, instances).([]ecsInstance)
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}
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func getCircuitBreaker(instance ecsInstance) *types.CircuitBreaker {
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expression := getStringValue(instance, label.TraefikBackendCircuitBreakerExpression, "")
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if len(expression) == 0 {
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return nil
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}
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return &types.CircuitBreaker{Expression: expression}
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}
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func getLoadBalancer(instance ecsInstance) *types.LoadBalancer {
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if !hasPrefix(instance, label.TraefikBackendLoadBalancer) {
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return nil
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}
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method := getStringValue(instance, label.TraefikBackendLoadBalancerMethod, label.DefaultBackendLoadBalancerMethod)
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lb := &types.LoadBalancer{
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Method: method,
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Sticky: getStickyOne(instance),
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}
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if getBoolValue(instance, label.TraefikBackendLoadBalancerStickiness, false) {
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cookieName := getStringValue(instance, label.TraefikBackendLoadBalancerStickinessCookieName, label.DefaultBackendLoadbalancerStickinessCookieName)
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lb.Stickiness = &types.Stickiness{CookieName: cookieName}
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}
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return lb
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}
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func getMaxConn(instance ecsInstance) *types.MaxConn {
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amount := getInt64Value(instance, label.TraefikBackendMaxConnAmount, math.MinInt64)
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extractorFunc := getStringValue(instance, label.TraefikBackendMaxConnExtractorFunc, label.DefaultBackendMaxconnExtractorFunc)
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if amount == math.MinInt64 || len(extractorFunc) == 0 {
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return nil
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}
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return &types.MaxConn{
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Amount: amount,
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ExtractorFunc: extractorFunc,
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}
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}
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func getHealthCheck(instance ecsInstance) *types.HealthCheck {
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path := getStringValue(instance, label.TraefikBackendHealthCheckPath, "")
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if len(path) == 0 {
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return nil
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}
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port := getIntValue(instance, label.TraefikBackendHealthCheckPort, label.DefaultBackendHealthCheckPort)
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interval := getStringValue(instance, label.TraefikBackendHealthCheckInterval, "")
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return &types.HealthCheck{
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Path: path,
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Port: port,
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Interval: interval,
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}
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}
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func getBuffering(instance ecsInstance) *types.Buffering {
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if !hasPrefix(instance, label.TraefikBackendBuffering) {
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return nil
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}
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return &types.Buffering{
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MaxRequestBodyBytes: getInt64Value(instance, label.TraefikBackendBufferingMaxRequestBodyBytes, 0),
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MaxResponseBodyBytes: getInt64Value(instance, label.TraefikBackendBufferingMaxResponseBodyBytes, 0),
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MemRequestBodyBytes: getInt64Value(instance, label.TraefikBackendBufferingMemRequestBodyBytes, 0),
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MemResponseBodyBytes: getInt64Value(instance, label.TraefikBackendBufferingMemResponseBodyBytes, 0),
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RetryExpression: getStringValue(instance, label.TraefikBackendBufferingRetryExpression, ""),
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}
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}
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func getServers(instances []ecsInstance) map[string]types.Server {
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var servers map[string]types.Server
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for _, instance := range instances {
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if servers == nil {
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servers = make(map[string]types.Server)
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}
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protocol := getStringValue(instance, label.TraefikProtocol, label.DefaultProtocol)
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host := getHost(instance)
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port := getPort(instance)
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serverName := provider.Normalize(fmt.Sprintf("server-%s-%s", instance.Name, instance.ID))
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servers[serverName] = types.Server{
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URL: fmt.Sprintf("%s://%s:%s", protocol, host, port),
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Weight: getIntValue(instance, label.TraefikWeight, 0),
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}
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}
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return servers
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}
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func getRedirect(instance ecsInstance) *types.Redirect {
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permanent := getBoolValue(instance, label.TraefikFrontendRedirectPermanent, false)
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if hasLabel(instance, label.TraefikFrontendRedirectEntryPoint) {
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return &types.Redirect{
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EntryPoint: getStringValue(instance, label.TraefikFrontendRedirectEntryPoint, ""),
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Permanent: permanent,
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}
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}
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if hasLabel(instance, label.TraefikFrontendRedirectRegex) &&
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hasLabel(instance, label.TraefikFrontendRedirectReplacement) {
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return &types.Redirect{
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Regex: getStringValue(instance, label.TraefikFrontendRedirectRegex, ""),
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Replacement: getStringValue(instance, label.TraefikFrontendRedirectReplacement, ""),
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Permanent: permanent,
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}
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}
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return nil
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}
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func getErrorPages(instance ecsInstance) map[string]*types.ErrorPage {
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labels := mapPToMap(instance.containerDefinition.DockerLabels)
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if len(labels) == 0 {
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return nil
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}
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prefix := label.Prefix + label.BaseFrontendErrorPage
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return label.ParseErrorPages(labels, prefix, label.RegexpFrontendErrorPage)
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}
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func getRateLimit(instance ecsInstance) *types.RateLimit {
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extractorFunc := getStringValue(instance, label.TraefikFrontendRateLimitExtractorFunc, "")
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if len(extractorFunc) == 0 {
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return nil
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}
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labels := mapPToMap(instance.containerDefinition.DockerLabels)
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prefix := label.Prefix + label.BaseFrontendRateLimit
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limits := label.ParseRateSets(labels, prefix, label.RegexpFrontendRateLimit)
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return &types.RateLimit{
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ExtractorFunc: extractorFunc,
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RateSet: limits,
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}
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}
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func getHeaders(instance ecsInstance) *types.Headers {
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headers := &types.Headers{
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CustomRequestHeaders: getMapString(instance, label.TraefikFrontendRequestHeaders),
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CustomResponseHeaders: getMapString(instance, label.TraefikFrontendResponseHeaders),
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SSLProxyHeaders: getMapString(instance, label.TraefikFrontendSSLProxyHeaders),
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AllowedHosts: getSliceString(instance, label.TraefikFrontendAllowedHosts),
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HostsProxyHeaders: getSliceString(instance, label.TraefikFrontendHostsProxyHeaders),
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STSSeconds: getInt64Value(instance, label.TraefikFrontendSTSSeconds, 0),
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SSLRedirect: getBoolValue(instance, label.TraefikFrontendSSLRedirect, false),
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SSLTemporaryRedirect: getBoolValue(instance, label.TraefikFrontendSSLTemporaryRedirect, false),
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STSIncludeSubdomains: getBoolValue(instance, label.TraefikFrontendSTSIncludeSubdomains, false),
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STSPreload: getBoolValue(instance, label.TraefikFrontendSTSPreload, false),
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ForceSTSHeader: getBoolValue(instance, label.TraefikFrontendForceSTSHeader, false),
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FrameDeny: getBoolValue(instance, label.TraefikFrontendFrameDeny, false),
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ContentTypeNosniff: getBoolValue(instance, label.TraefikFrontendContentTypeNosniff, false),
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BrowserXSSFilter: getBoolValue(instance, label.TraefikFrontendBrowserXSSFilter, false),
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IsDevelopment: getBoolValue(instance, label.TraefikFrontendIsDevelopment, false),
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SSLHost: getStringValue(instance, label.TraefikFrontendSSLHost, ""),
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CustomFrameOptionsValue: getStringValue(instance, label.TraefikFrontendCustomFrameOptionsValue, ""),
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ContentSecurityPolicy: getStringValue(instance, label.TraefikFrontendContentSecurityPolicy, ""),
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PublicKey: getStringValue(instance, label.TraefikFrontendPublicKey, ""),
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ReferrerPolicy: getStringValue(instance, label.TraefikFrontendReferrerPolicy, ""),
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CustomBrowserXSSValue: getStringValue(instance, label.TraefikFrontendCustomBrowserXSSValue, ""),
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}
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if !headers.HasSecureHeadersDefined() && !headers.HasCustomHeadersDefined() {
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return nil
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}
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return headers
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}
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// Label functions
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func getFuncStringValue(labelName string, defaultValue string) func(i ecsInstance) string {
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return func(i ecsInstance) string {
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return getStringValue(i, labelName, defaultValue)
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}
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}
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func getFuncBoolValue(labelName string, defaultValue bool) func(i ecsInstance) bool {
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return func(i ecsInstance) bool {
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return getBoolValue(i, labelName, defaultValue)
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}
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}
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func getFuncIntValue(labelName string, defaultValue int) func(i ecsInstance) int {
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return func(i ecsInstance) int {
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return getIntValue(i, labelName, defaultValue)
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}
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}
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func getFuncSliceString(labelName string) func(i ecsInstance) []string {
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return func(i ecsInstance) []string {
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return getSliceString(i, labelName)
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}
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}
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// Deprecated
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func hasFuncFirst(labelName string) func(instances []ecsInstance) bool {
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return func(instances []ecsInstance) bool {
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return hasFirst(instances, labelName)
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}
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}
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// Deprecated
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func getFuncFirstStringValue(labelName string, defaultValue string) func(instances []ecsInstance) string {
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return func(instances []ecsInstance) string {
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return getFirstStringValue(instances, labelName, defaultValue)
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}
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}
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// Deprecated
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func getFuncFirstBoolValue(labelName string, defaultValue bool) func(instances []ecsInstance) bool {
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return func(instances []ecsInstance) bool {
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if len(instances) < 0 {
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return defaultValue
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}
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return getBoolValue(instances[0], labelName, defaultValue)
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}
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}
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func hasLabel(i ecsInstance, labelName string) bool {
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value, ok := i.containerDefinition.DockerLabels[labelName]
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return ok && value != nil && len(aws.StringValue(value)) > 0
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}
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func hasPrefix(i ecsInstance, prefix string) bool {
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for name, value := range i.containerDefinition.DockerLabels {
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if strings.HasPrefix(name, prefix) && value != nil && len(aws.StringValue(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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func getStringValue(i ecsInstance, labelName string, defaultValue string) string {
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if v, ok := i.containerDefinition.DockerLabels[labelName]; ok {
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if v == nil {
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return defaultValue
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}
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if len(aws.StringValue(v)) == 0 {
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return defaultValue
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}
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return aws.StringValue(v)
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}
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return defaultValue
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}
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func getBoolValue(i ecsInstance, labelName string, defaultValue bool) bool {
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rawValue, ok := i.containerDefinition.DockerLabels[labelName]
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if ok {
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if rawValue != nil {
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v, err := strconv.ParseBool(aws.StringValue(rawValue))
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if err == nil {
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return v
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}
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}
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}
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return defaultValue
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}
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func getIntValue(i ecsInstance, labelName string, defaultValue int) int {
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rawValue, ok := i.containerDefinition.DockerLabels[labelName]
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if ok {
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if rawValue != nil {
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v, err := strconv.Atoi(aws.StringValue(rawValue))
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if err == nil {
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return v
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}
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}
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}
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return defaultValue
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}
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func getInt64Value(i ecsInstance, labelName string, defaultValue int64) int64 {
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rawValue, ok := i.containerDefinition.DockerLabels[labelName]
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if ok {
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if rawValue != nil {
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v, err := strconv.ParseInt(aws.StringValue(rawValue), 10, 64)
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if err == nil {
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return v
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}
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}
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}
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return defaultValue
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}
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func getSliceString(i ecsInstance, labelName string) []string {
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if value, ok := i.containerDefinition.DockerLabels[labelName]; ok {
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if value == nil {
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return nil
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}
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if len(aws.StringValue(value)) == 0 {
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return nil
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}
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return label.SplitAndTrimString(aws.StringValue(value), ",")
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}
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return nil
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}
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func getMapString(i ecsInstance, labelName string) map[string]string {
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if value, ok := i.containerDefinition.DockerLabels[labelName]; ok {
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if value == nil {
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return nil
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}
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if len(aws.StringValue(value)) == 0 {
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return nil
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}
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return label.ParseMapValue(labelName, aws.StringValue(value))
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}
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return nil
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}
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// Deprecated
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func hasFirst(instances []ecsInstance, labelName string) bool {
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if len(instances) == 0 {
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return false
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}
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return hasLabel(instances[0], labelName)
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}
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// Deprecated
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func getFirstStringValue(instances []ecsInstance, labelName string, defaultValue string) string {
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if len(instances) == 0 {
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return defaultValue
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}
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return getStringValue(instances[0], labelName, defaultValue)
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}
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// Deprecated
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func getFirstBoolValue(instances []ecsInstance, labelName string, defaultValue bool) bool {
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if len(instances) == 0 {
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return defaultValue
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}
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return getBoolValue(instances[0], labelName, defaultValue)
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}
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func mapPToMap(src map[string]*string) map[string]string {
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result := make(map[string]string)
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for key, value := range src {
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if value != nil && len(aws.StringValue(value)) > 0 {
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result[key] = aws.StringValue(value)
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}
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}
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return result
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}
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func isEnabled(i ecsInstance, exposedByDefault bool) bool {
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return getBoolValue(i, label.TraefikEnable, exposedByDefault)
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}
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