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Add Service Fabric Provider

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Lawrence Gripper 2017-11-27 13:26:04 +00:00 • committed by Traefiker
parent 9f6f637527
commit 39c1cc1b3c
21 changed files with 1624 additions and 18 deletions
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358
vendor/github.com/containous/traefik-extra-service-fabric/servicefabric.go generated vendored Normal file
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package servicefabric
import (
"encoding/json"
"errors"
"net/http"
"strings"
"text/template"
"time"
"github.com/cenk/backoff"
"github.com/containous/traefik/job"
"github.com/containous/traefik/log"
"github.com/containous/traefik/provider"
"github.com/containous/traefik/safe"
"github.com/containous/traefik/types"
sf "github.com/jjcollinge/servicefabric"
)
var _ provider.Provider = (*Provider)(nil)
const traefikLabelPrefix = "traefik"
// Provider holds for configuration for the provider
type Provider struct {
provider.BaseProvider `mapstructure:",squash"`
ClusterManagementURL string `description:"Service Fabric API endpoint"`
APIVersion string `description:"Service Fabric API version" export:"true"`
RefreshSeconds int `description:"Polling interval (in seconds)" export:"true"`
TLS *types.ClientTLS `description:"Enable TLS support" export:"true"`
}
// Provide allows the ServiceFabric provider to provide configurations to traefik
// using the given configuration channel.
func (p *Provider) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, constraints types.Constraints) error {
if p.APIVersion == "" {
p.APIVersion = sf.DefaultAPIVersion
}
tlsConfig, err := p.TLS.CreateTLSConfig()
if err != nil {
return err
}
sfClient, err := sf.NewClient(http.DefaultClient, p.ClusterManagementURL, p.APIVersion, tlsConfig)
if err != nil {
return err
}
if p.RefreshSeconds <= 0 {
p.RefreshSeconds = 10
}
return p.updateConfig(configurationChan, pool, sfClient, time.Duration(p.RefreshSeconds)*time.Second)
}
func (p *Provider) updateConfig(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, sfClient sfClient, pollInterval time.Duration) error {
pool.Go(func(stop chan bool) {
operation := func() error {
ticker := time.NewTicker(pollInterval)
for range ticker.C {
select {
case shouldStop := <-stop:
if shouldStop {
ticker.Stop()
return nil
}
default:
log.Info("Checking service fabric config")
}
services, err := getClusterServices(sfClient)
if err != nil {
return err
}
templateObjects := struct {
Services []ServiceItemExtended
}{
services,
}
var sfFuncMap = template.FuncMap{
"isPrimary": isPrimary,
"getDefaultEndpoint": p.getDefaultEndpoint,
"getNamedEndpoint": p.getNamedEndpoint,
"getApplicationParameter": p.getApplicationParameter,
"doesAppParamContain": p.doesAppParamContain,
"hasServiceLabel": hasServiceLabel,
"getServiceLabelValue": getServiceLabelValue,
"getServiceLabelValueWithDefault": getServiceLabelValueWithDefault,
"getServiceLabelsWithPrefix": getServiceLabelsWithPrefix,
"getServicesWithLabelValueMap": getServicesWithLabelValueMap,
"getServicesWithLabelValue": getServicesWithLabelValue,
}
configuration, err := p.GetConfiguration(tmpl, sfFuncMap, templateObjects)
if err != nil {
return err
}
configurationChan <- types.ConfigMessage{
ProviderName: "servicefabric",
Configuration: configuration,
}
}
return nil
}
notify := func(err error, time time.Duration) {
log.Errorf("Provider connection error: %v; retrying in %s", err, time)
}
err := backoff.RetryNotify(safe.OperationWithRecover(operation), job.NewBackOff(backoff.NewExponentialBackOff()), notify)
if err != nil {
log.Errorf("Cannot connect to Provider: %v", err)
}
})
return nil
}
func (p Provider) doesAppParamContain(app sf.ApplicationItem, key, shouldContain string) bool {
value := p.getApplicationParameter(app, key)
return strings.Contains(value, shouldContain)
}
func (p Provider) getApplicationParameter(app sf.ApplicationItem, key string) string {
for _, param := range app.Parameters {
if param.Key == key {
return param.Value
}
}
log.Errorf("Parameter %s doesn't exist in app %s", key, app.Name)
return ""
}
func (p Provider) getDefaultEndpoint(instance replicaInstance) string {
id, data := instance.GetReplicaData()
endpoint, err := getDefaultEndpoint(data.Address)
if err != nil {
log.Warnf("No default endpoint for replica %s in service %s endpointData: %s", id, data.Address)
return ""
}
return endpoint
}
func (p Provider) getNamedEndpoint(instance replicaInstance, endpointName string) string {
id, data := instance.GetReplicaData()
endpoint, err := getNamedEndpoint(data.Address, endpointName)
if err != nil {
log.Warnf("No names endpoint of %s for replica %s in endpointData: %s", endpointName, id, data.Address)
return ""
}
return endpoint
}
func getClusterServices(sfClient sfClient) ([]ServiceItemExtended, error) {
apps, err := sfClient.GetApplications()
if err != nil {
return nil, err
}
var results []ServiceItemExtended
for _, app := range apps.Items {
services, err := sfClient.GetServices(app.ID)
if err != nil {
return nil, err
}
for _, service := range services.Items {
item := ServiceItemExtended{
ServiceItem: service,
Application: app,
}
if labels, err := sfClient.GetServiceLabels(&service, &app, traefikLabelPrefix); err != nil {
log.Error(err)
} else {
item.Labels = labels
}
if partitions, err := sfClient.GetPartitions(app.ID, service.ID); err != nil {
log.Error(err)
} else {
for _, partition := range partitions.Items {
partitionExt := PartitionItemExtended{PartitionItem: partition}
if partition.ServiceKind == "Stateful" {
partitionExt.Replicas = getValidReplicas(sfClient, app, service, partition)
} else if partition.ServiceKind == "Stateless" {
partitionExt.Instances = getValidInstances(sfClient, app, service, partition)
} else {
log.Errorf("Unsupported service kind %s in service %s", partition.ServiceKind, service.Name)
continue
}
item.Partitions = append(item.Partitions, partitionExt)
}
}
results = append(results, item)
}
}
return results, nil
}
func getValidReplicas(sfClient sfClient, app sf.ApplicationItem, service sf.ServiceItem, partition sf.PartitionItem) []sf.ReplicaItem {
var validReplicas []sf.ReplicaItem
if replicas, err := sfClient.GetReplicas(app.ID, service.ID, partition.PartitionInformation.ID); err != nil {
log.Error(err)
} else {
for _, instance := range replicas.Items {
if isHealthy(instance.ReplicaItemBase) && hasHTTPEndpoint(instance.ReplicaItemBase) {
validReplicas = append(validReplicas, instance)
}
}
}
return validReplicas
}
func getValidInstances(sfClient sfClient, app sf.ApplicationItem, service sf.ServiceItem, partition sf.PartitionItem) []sf.InstanceItem {
var validInstances []sf.InstanceItem
if instances, err := sfClient.GetInstances(app.ID, service.ID, partition.PartitionInformation.ID); err != nil {
log.Error(err)
} else {
for _, instance := range instances.Items {
if isHealthy(instance.ReplicaItemBase) && hasHTTPEndpoint(instance.ReplicaItemBase) {
validInstances = append(validInstances, instance)
}
}
}
return validInstances
}
func hasServiceLabel(service ServiceItemExtended, key string) bool {
_, exists := service.Labels[key]
return exists
}
func getServiceLabelValue(service ServiceItemExtended, key string) string {
return service.Labels[key]
}
func getServicesWithLabelValueMap(services []ServiceItemExtended, key string) map[string][]ServiceItemExtended {
result := map[string][]ServiceItemExtended{}
for _, service := range services {
if value, exists := service.Labels[key]; exists {
if matchingServices, hasKeyAlready := result[value]; hasKeyAlready {
result[value] = append(matchingServices, service)
} else {
result[value] = []ServiceItemExtended{service}
}
}
}
return result
}
func getServicesWithLabelValue(services []ServiceItemExtended, key, expectedValue string) []ServiceItemExtended {
var srvWithLabel []ServiceItemExtended
for _, service := range services {
value, exists := service.Labels[key]
if exists && value == expectedValue {
srvWithLabel = append(srvWithLabel, service)
}
}
return srvWithLabel
}
func getServiceLabelValueWithDefault(service ServiceItemExtended, key, defaultValue string) string {
value, exists := service.Labels[key]
if !exists {
return defaultValue
}
return value
}
func getServiceLabelsWithPrefix(service ServiceItemExtended, prefix string) map[string]string {
results := make(map[string]string)
for k, v := range service.Labels {
if strings.HasPrefix(k, prefix) {
results[k] = v
}
}
return results
}
func isPrimary(instance replicaInstance) bool {
_, data := instance.GetReplicaData()
return data.ReplicaRole == "Primary"
}
func isHealthy(instanceData *sf.ReplicaItemBase) bool {
return instanceData != nil && (instanceData.ReplicaStatus == "Ready" || instanceData.HealthState != "Error")
}
func hasHTTPEndpoint(instanceData *sf.ReplicaItemBase) bool {
_, err := getDefaultEndpoint(instanceData.Address)
return err == nil
}
func decodeEndpointData(endpointData string) (map[string]string, error) {
var endpointsMap map[string]map[string]string
if endpointData == "" {
return nil, errors.New("endpoint data is empty")
}
err := json.Unmarshal([]byte(endpointData), &endpointsMap)
if err != nil {
return nil, err
}
endpoints, endpointsExist := endpointsMap["Endpoints"]
if !endpointsExist {
return nil, errors.New("endpoint doesn't exist in endpoint data")
}
return endpoints, nil
}
func getDefaultEndpoint(endpointData string) (string, error) {
endpoints, err := decodeEndpointData(endpointData)
if err != nil {
return "", err
}
var defaultHTTPEndpointExists bool
var defaultHTTPEndpoint string
for _, v := range endpoints {
if strings.Contains(v, "http") {
defaultHTTPEndpoint = v
defaultHTTPEndpointExists = true
break
}
}
if !defaultHTTPEndpointExists {
return "", errors.New("no default endpoint found")
}
return defaultHTTPEndpoint, nil
}
func getNamedEndpoint(endpointData string, endpointName string) (string, error) {
endpoints, err := decodeEndpointData(endpointData)
if err != nil {
return "", err
}
endpoint, exists := endpoints[endpointName]
if !exists {
return "", errors.New("endpoint doesn't exist")
}
return endpoint, nil
}

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vendor/github.com/containous/traefik-extra-service-fabric/servicefabric_tmpl.go generated vendored Normal file
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package servicefabric
const tmpl = `
[backends]
{{$groupedServiceMap := getServicesWithLabelValueMap .Services "backend.group.name"}}
{{range $aggName, $aggServices := $groupedServiceMap }}
[backends."{{$aggName}}"]
{{range $service := $aggServices}}
{{range $partition := $service.Partitions}}
{{range $instance := $partition.Instances}}
[backends."{{$aggName}}".servers."{{$service.ID}}-{{$instance.ID}}"]
url = "{{getDefaultEndpoint $instance}}"
weight = {{getServiceLabelValueWithDefault $service "backend.group.weight" "1"}}
{{end}}
{{end}}
{{end}}
{{end}}
{{range $service := .Services}}
{{range $partition := $service.Partitions}}
{{if eq $partition.ServiceKind "Stateless"}}
[backends."{{$service.Name}}"]
[backends."{{$service.Name}}".LoadBalancer]
{{if hasServiceLabel $service "backend.loadbalancer.method"}}
method = "{{getServiceLabelValue $service "backend.loadbalancer.method" }}"
{{else}}
method = "drr"
{{end}}
{{if hasServiceLabel $service "backend.healthcheck"}}
[backends."{{$service.Name}}".healthcheck]
path = "{{getServiceLabelValue $service "backend.healthcheck"}}"
interval = "{{getServiceLabelValueWithDefault $service "backend.healthcheck.interval" "10s"}}"
{{end}}
{{if hasServiceLabel $service "backend.loadbalancer.stickiness"}}
[backends."{{$service.Name}}".LoadBalancer.stickiness]
{{end}}
{{if hasServiceLabel $service "backend.circuitbreaker"}}
[backends."{{$service.Name}}".circuitbreaker]
expression = "{{getServiceLabelValue $service "backend.circuitbreaker"}}"
{{end}}
{{if hasServiceLabel $service "backend.maxconn.amount"}}
[backends."{{$service.Name}}".maxconn]
amount = {{getServiceLabelValue $service "backend.maxconn.amount"}}
{{if hasServiceLabel $service "backend.maxconn.extractorfunc"}}
extractorfunc = "{{getServiceLabelValue $service "backend.maxconn.extractorfunc"}}"
{{end}}
{{end}}
{{range $instance := $partition.Instances}}
[backends."{{$service.Name}}".servers."{{$instance.ID}}"]
url = "{{getDefaultEndpoint $instance}}"
weight = {{getServiceLabelValueWithDefault $service "backend.weight" "1"}}
{{end}}
{{else if eq $partition.ServiceKind "Stateful"}}
{{range $replica := $partition.Replicas}}
{{if isPrimary $replica}}
{{$backendName := (print $service.Name $partition.PartitionInformation.ID)}}
[backends."{{$backendName}}".servers."{{$replica.ID}}"]
url = "{{getDefaultEndpoint $replica}}"
weight = 1
[backends."{{$backendName}}".LoadBalancer]
method = "drr"
[backends."{{$backendName}}".circuitbreaker]
expression = "NetworkErrorRatio() > 0.5"
{{end}}
{{end}}
{{end}}
{{end}}
{{end}}
[frontends]
{{range $groupName, $groupServices := $groupedServiceMap}}
{{$service := index $groupServices 0}}
[frontends."{{$groupName}}"]
backend = "{{$groupName}}"
{{if hasServiceLabel $service "frontend.priority"}}
priority = 100
{{end}}
{{range $key, $value := getServiceLabelsWithPrefix $service "frontend.rule"}}
[frontends."{{$groupName}}".routes."{{$key}}"]
rule = "{{$value}}"
{{end}}
{{end}}
{{range $service := .Services}}
{{if hasServiceLabel $service "expose"}}
{{if eq $service.ServiceKind "Stateless"}}
[frontends."{{$service.Name}}"]
backend = "{{$service.Name}}"
{{if hasServiceLabel $service "frontend.passHostHeader"}}
passHostHeader = {{getServiceLabelValue $service "frontend.passHostHeader" }}
{{end}}
{{if hasServiceLabel $service "frontend.whitelistSourceRange"}}
whitelistSourceRange = {{getServiceLabelValue $service "frontend.whitelistSourceRange" }}
{{end}}
{{if hasServiceLabel $service "frontend.priority"}}
priority = {{getServiceLabelValue $service "frontend.priority"}}
{{end}}
{{if hasServiceLabel $service "frontend.basicAuth"}}
basicAuth = {{getServiceLabelValue $service "frontend.basicAuth"}}
{{end}}
{{if hasServiceLabel $service "frontend.entryPoints"}}
entryPoints = {{getServiceLabelValue $service "frontend.entryPoints"}}
{{end}}
{{range $key, $value := getServiceLabelsWithPrefix $service "frontend.rule"}}
[frontends."{{$service.Name}}".routes."{{$key}}"]
rule = "{{$value}}"
{{end}}
{{else if eq $service.ServiceKind "Stateful"}}
{{range $partition := $service.Partitions}}
{{$partitionId := $partition.PartitionInformation.ID}}
{{if hasServiceLabel $service "frontend.rule"}}
[frontends."{{$service.Name}}/{{$partitionId}}"]
backend = "{{$service.Name}}/{{$partitionId}}"
[frontends."{{$service.Name}}/{{$partitionId}}".routes.default]
rule = {{getServiceLabelValue $service "frontend.rule.partition.$partitionId"}}
{{end}}
{{end}}
{{end}}
{{end}}
{{end}}
`

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vendor/github.com/containous/traefik-extra-service-fabric/types.go generated vendored Normal file
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package servicefabric
import (
sf "github.com/jjcollinge/servicefabric"
)
// ServiceItemExtended provides a flattened view
// of the service with details of the application
// it belongs too and the replicas/partitions
type ServiceItemExtended struct {
sf.ServiceItem
HasHTTPEndpoint bool
IsHealthy bool
Application sf.ApplicationItem
Partitions []PartitionItemExtended
Labels map[string]string
}
// PartitionItemExtended provides a flattened view
// of a services partitions
type PartitionItemExtended struct {
sf.PartitionItem
Replicas []sf.ReplicaItem
Instances []sf.InstanceItem
}
// sfClient is an interface for Service Fabric client's to implement.
// This is purposely a subset of the total Service Fabric API surface.
type sfClient interface {
GetApplications() (*sf.ApplicationItemsPage, error)
GetServices(appName string) (*sf.ServiceItemsPage, error)
GetPartitions(appName, serviceName string) (*sf.PartitionItemsPage, error)
GetReplicas(appName, serviceName, partitionName string) (*sf.ReplicaItemsPage, error)
GetInstances(appName, serviceName, partitionName string) (*sf.InstanceItemsPage, error)
GetServiceExtension(appType, applicationVersion, serviceTypeName, extensionKey string, response interface{}) error
GetServiceLabels(service *sf.ServiceItem, app *sf.ApplicationItem, prefix string) (map[string]string, error)
}
// replicaInstance interface provides a unified interface
// over replicas and instances
type replicaInstance interface {
GetReplicaData() (string, *sf.ReplicaItemBase)
}