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Support Nomad canary deployment

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Co-authored-by: Kevin Pollet <pollet.kevin@gmail.com>
Co-authored-by: Mathieu Lonjaret <mathieu.lonjaret@gmail.com>
This commit is contained in:
Romain 2022-08-01 17:52:08 +02:00 committed by GitHub
parent ab94bbaece
commit 2a2ea759d1
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GPG key ID: 4AEE18F83AFDEB23
10 changed files with 593 additions and 51 deletions
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14
docs/content/routing/providers/consul-catalog.md
View file

@ -470,6 +470,20 @@ You can tell Traefik to consider (or not) the service as a Connect capable one b
This option overrides the value of `connectByDefault`.
#### `traefik.consulcatalog.canary`
```yaml
traefik.consulcatalog.canary=true
```
When ConsulCatalog, in the context of a Nomad orchestrator,
is a provider (of service registration) for Traefik,
one might have the need to distinguish within Traefik between a [Canary](https://learn.hashicorp.com/tutorials/nomad/job-blue-green-and-canary-deployments#deploy-with-canaries) instance of a service, or a production one.
For example if one does not want them to be part of the same load-balancer.
Therefore, this option, which is meant to be provided as one of the values of the `canary_tags` field in the Nomad [service stanza](https://www.nomadproject.io/docs/job-specification/service#canary_tags),
allows Traefik to identify that the associated instance is a canary one.
#### Port Lookup
Traefik is capable of detecting the port to use, by following the default consul Catalog flow.

13
docs/content/routing/providers/nomad.md
View file

@ -460,6 +460,19 @@ You can tell Traefik to consider (or not) the service by setting `traefik.enable
This option overrides the value of `exposedByDefault`.
#### `traefik.nomad.canary`
```yaml
traefik.nomad.canary=true
```
When Nomad orchestrator is a provider (of service registration) for Traefik,
one might have the need to distinguish within Traefik between a [Canary](https://learn.hashicorp.com/tutorials/nomad/job-blue-green-and-canary-deployments#deploy-with-canaries) instance of a service, or a production one.
For example if one does not want them to be part of the same load-balancer.
Therefore, this option, which is meant to be provided as one of the values of the `canary_tags` field in the Nomad [service stanza](https://www.nomadproject.io/docs/job-specification/service#canary_tags),
allows Traefik to identify that the associated instance is a canary one.
#### Port Lookup
Traefik is capable of detecting the port to use, by following the default Nomad Service Discovery flow.

65
pkg/provider/consulcatalog/config.go
View file

@ -4,7 +4,10 @@ import (
"context"
"errors"
"fmt"
"hash/fnv"
"net"
"sort"
"strings"
"github.com/hashicorp/consul/api"
"github.com/traefik/traefik/v2/pkg/config/dynamic"
@ -37,8 +40,7 @@ func (p *Provider) buildConfiguration(ctx context.Context, items []itemData, cer
if len(confFromLabel.TCP.Routers) > 0 || len(confFromLabel.TCP.Services) > 0 {
tcpOrUDP = true
err := p.buildTCPServiceConfiguration(ctxSvc, item, confFromLabel.TCP)
if err != nil {
if err := p.buildTCPServiceConfiguration(item, confFromLabel.TCP); err != nil {
logger.Error(err)
continue
}
@ -49,8 +51,7 @@ func (p *Provider) buildConfiguration(ctx context.Context, items []itemData, cer
if len(confFromLabel.UDP.Routers) > 0 || len(confFromLabel.UDP.Services) > 0 {
tcpOrUDP = true
err := p.buildUDPServiceConfiguration(ctxSvc, item, confFromLabel.UDP)
if err != nil {
if err := p.buildUDPServiceConfiguration(item, confFromLabel.UDP); err != nil {
logger.Error(err)
continue
}
@ -75,8 +76,7 @@ func (p *Provider) buildConfiguration(ctx context.Context, items []itemData, cer
}
}
err = p.buildServiceConfiguration(ctxSvc, item, confFromLabel.HTTP)
if err != nil {
if err = p.buildServiceConfiguration(item, confFromLabel.HTTP); err != nil {
logger.Error(err)
continue
}
@ -89,7 +89,7 @@ func (p *Provider) buildConfiguration(ctx context.Context, items []itemData, cer
Labels: item.Labels,
}
provider.BuildRouterConfiguration(ctx, confFromLabel.HTTP, provider.Normalize(item.Name), p.defaultRuleTpl, model)
provider.BuildRouterConfiguration(ctx, confFromLabel.HTTP, getName(item), p.defaultRuleTpl, model)
configurations[svcName] = confFromLabel
}
@ -128,22 +128,20 @@ func (p *Provider) keepContainer(ctx context.Context, item itemData) bool {
return true
}
func (p *Provider) buildTCPServiceConfiguration(ctx context.Context, item itemData, configuration *dynamic.TCPConfiguration) error {
func (p *Provider) buildTCPServiceConfiguration(item itemData, configuration *dynamic.TCPConfiguration) error {
if len(configuration.Services) == 0 {
configuration.Services = make(map[string]*dynamic.TCPService)
lb := &dynamic.TCPServersLoadBalancer{}
lb.SetDefaults()
configuration.Services[provider.Normalize(item.Name)] = &dynamic.TCPService{
configuration.Services[getName(item)] = &dynamic.TCPService{
LoadBalancer: lb,
}
}
for name, service := range configuration.Services {
ctxSvc := log.With(ctx, log.Str(log.ServiceName, name))
err := p.addServerTCP(ctxSvc, item, service.LoadBalancer)
if err != nil {
for _, service := range configuration.Services {
if err := p.addServerTCP(item, service.LoadBalancer); err != nil {
return err
}
}
@ -151,21 +149,19 @@ func (p *Provider) buildTCPServiceConfiguration(ctx context.Context, item itemDa
return nil
}
func (p *Provider) buildUDPServiceConfiguration(ctx context.Context, item itemData, configuration *dynamic.UDPConfiguration) error {
func (p *Provider) buildUDPServiceConfiguration(item itemData, configuration *dynamic.UDPConfiguration) error {
if len(configuration.Services) == 0 {
configuration.Services = make(map[string]*dynamic.UDPService)
lb := &dynamic.UDPServersLoadBalancer{}
configuration.Services[provider.Normalize(item.Name)] = &dynamic.UDPService{
configuration.Services[getName(item)] = &dynamic.UDPService{
LoadBalancer: lb,
}
}
for name, service := range configuration.Services {
ctxSvc := log.With(ctx, log.Str(log.ServiceName, name))
err := p.addServerUDP(ctxSvc, item, service.LoadBalancer)
if err != nil {
for _, service := range configuration.Services {
if err := p.addServerUDP(item, service.LoadBalancer); err != nil {
return err
}
}
@ -173,22 +169,20 @@ func (p *Provider) buildUDPServiceConfiguration(ctx context.Context, item itemDa
return nil
}
func (p *Provider) buildServiceConfiguration(ctx context.Context, item itemData, configuration *dynamic.HTTPConfiguration) error {
func (p *Provider) buildServiceConfiguration(item itemData, configuration *dynamic.HTTPConfiguration) error {
if len(configuration.Services) == 0 {
configuration.Services = make(map[string]*dynamic.Service)
lb := &dynamic.ServersLoadBalancer{}
lb.SetDefaults()
configuration.Services[provider.Normalize(item.Name)] = &dynamic.Service{
configuration.Services[getName(item)] = &dynamic.Service{
LoadBalancer: lb,
}
}
for name, service := range configuration.Services {
ctxSvc := log.With(ctx, log.Str(log.ServiceName, name))
err := p.addServer(ctxSvc, item, service.LoadBalancer)
if err != nil {
for _, service := range configuration.Services {
if err := p.addServer(item, service.LoadBalancer); err != nil {
return err
}
}
@ -196,7 +190,7 @@ func (p *Provider) buildServiceConfiguration(ctx context.Context, item itemData,
return nil
}
func (p *Provider) addServerTCP(ctx context.Context, item itemData, loadBalancer *dynamic.TCPServersLoadBalancer) error {
func (p *Provider) addServerTCP(item itemData, loadBalancer *dynamic.TCPServersLoadBalancer) error {
if loadBalancer == nil {
return errors.New("load-balancer is not defined")
}
@ -227,7 +221,7 @@ func (p *Provider) addServerTCP(ctx context.Context, item itemData, loadBalancer
return nil
}
func (p *Provider) addServerUDP(ctx context.Context, item itemData, loadBalancer *dynamic.UDPServersLoadBalancer) error {
func (p *Provider) addServerUDP(item itemData, loadBalancer *dynamic.UDPServersLoadBalancer) error {
if loadBalancer == nil {
return errors.New("load-balancer is not defined")
}
@ -254,7 +248,7 @@ func (p *Provider) addServerUDP(ctx context.Context, item itemData, loadBalancer
return nil
}
func (p *Provider) addServer(ctx context.Context, item itemData, loadBalancer *dynamic.ServersLoadBalancer) error {
func (p *Provider) addServer(item itemData, loadBalancer *dynamic.ServersLoadBalancer) error {
if loadBalancer == nil {
return errors.New("load-balancer is not defined")
}
@ -300,3 +294,18 @@ func (p *Provider) addServer(ctx context.Context, item itemData, loadBalancer *d
func itemServersTransportKey(item itemData) string {
return provider.Normalize("tls-" + item.Namespace + "-" + item.Datacenter + "-" + item.Name)
}
func getName(i itemData) string {
if !i.ExtraConf.ConsulCatalog.Canary {
return provider.Normalize(i.Name)
}
tags := make([]string, len(i.Tags))
copy(tags, i.Tags)
sort.Strings(tags)
hasher := fnv.New64()
hasher.Write([]byte(strings.Join(tags, "")))
return provider.Normalize(fmt.Sprintf("%s-%d", i.Name, hasher.Sum64()))
}

251
pkg/provider/consulcatalog/config_test.go
View file

@ -273,7 +273,7 @@ func TestDefaultRule(t *testing.T) {
for i := 0; i < len(test.items); i++ {
var err error
test.items[i].ExtraConf, err = p.getConfiguration(test.items[i].Labels)
test.items[i].ExtraConf, err = p.getExtraConf(test.items[i].Labels)
require.NoError(t, err)
}
@ -2611,6 +2611,253 @@ func Test_buildConfiguration(t *testing.T) {
},
},
},
{
desc: "two HTTP service instances with one canary",
ConnectAware: true,
items: []itemData{
{
ID: "1",
Node: "Node1",
Datacenter: "dc1",
Name: "Test",
Namespace: "ns",
Labels: map[string]string{
"traefik.consulcatalog.connect": "true",
},
Address: "127.0.0.1",
Port: "80",
Status: api.HealthPassing,
},
{
ID: "2",
Node: "Node1",
Datacenter: "dc1",
Name: "Test",
Namespace: "ns",
Labels: map[string]string{
"traefik.consulcatalog.connect": "true",
"traefik.consulcatalog.canary": "true",
},
Address: "127.0.0.2",
Port: "80",
Status: api.HealthPassing,
},
},
expected: &dynamic.Configuration{
TCP: &dynamic.TCPConfiguration{
Routers: map[string]*dynamic.TCPRouter{},
Middlewares: map[string]*dynamic.TCPMiddleware{},
Services: map[string]*dynamic.TCPService{},
},
UDP: &dynamic.UDPConfiguration{
Routers: map[string]*dynamic.UDPRouter{},
Services: map[string]*dynamic.UDPService{},
},
HTTP: &dynamic.HTTPConfiguration{
Routers: map[string]*dynamic.Router{
"Test": {
Service: "Test",
Rule: "Host(`Test.traefik.wtf`)",
},
"Test-97077516270503695": {
Service: "Test-97077516270503695",
Rule: "Host(`Test.traefik.wtf`)",
},
},
Middlewares: map[string]*dynamic.Middleware{},
Services: map[string]*dynamic.Service{
"Test": {
LoadBalancer: &dynamic.ServersLoadBalancer{
Servers: []dynamic.Server{
{
URL: "https://127.0.0.1:80",
},
},
PassHostHeader: Bool(true),
ServersTransport: "tls-ns-dc1-Test",
},
},
"Test-97077516270503695": {
LoadBalancer: &dynamic.ServersLoadBalancer{
Servers: []dynamic.Server{
{
URL: "https://127.0.0.2:80",
},
},
PassHostHeader: Bool(true),
ServersTransport: "tls-ns-dc1-Test",
},
},
},
ServersTransports: map[string]*dynamic.ServersTransport{
"tls-ns-dc1-Test": {
ServerName: "ns-dc1-Test",
InsecureSkipVerify: true,
RootCAs: []tls.FileOrContent{
"root",
},
Certificates: []tls.Certificate{
{
CertFile: "cert",
KeyFile: "key",
},
},
PeerCertURI: "spiffe:///ns/ns/dc/dc1/svc/Test",
},
},
},
},
},
{
desc: "two TCP service instances with one canary",
ConnectAware: true,
items: []itemData{
{
ID: "1",
Node: "Node1",
Datacenter: "dc1",
Name: "Test",
Namespace: "ns",
Labels: map[string]string{
"traefik.tcp.routers.test.rule": "HostSNI(`foobar`)",
},
Address: "127.0.0.1",
Port: "80",
Status: api.HealthPassing,
},
{
ID: "2",
Node: "Node1",
Datacenter: "dc1",
Name: "Test",
Namespace: "ns",
Labels: map[string]string{
"traefik.consulcatalog.canary": "true",
"traefik.tcp.routers.test-canary.rule": "HostSNI(`canary.foobar`)",
},
Address: "127.0.0.2",
Port: "80",
Status: api.HealthPassing,
},
},
expected: &dynamic.Configuration{
TCP: &dynamic.TCPConfiguration{
Routers: map[string]*dynamic.TCPRouter{
"test": {
Service: "Test",
Rule: "HostSNI(`foobar`)",
},
"test-canary": {
Service: "Test-17573747155436217342",
Rule: "HostSNI(`canary.foobar`)",
},
},
Middlewares: map[string]*dynamic.TCPMiddleware{},
Services: map[string]*dynamic.TCPService{
"Test": {
LoadBalancer: &dynamic.TCPServersLoadBalancer{
Servers: []dynamic.TCPServer{
{Address: "127.0.0.1:80"},
},
TerminationDelay: Int(100),
},
},
"Test-17573747155436217342": {
LoadBalancer: &dynamic.TCPServersLoadBalancer{
Servers: []dynamic.TCPServer{
{Address: "127.0.0.2:80"},
},
TerminationDelay: Int(100),
},
},
},
},
UDP: &dynamic.UDPConfiguration{
Routers: map[string]*dynamic.UDPRouter{},
Services: map[string]*dynamic.UDPService{},
},
HTTP: &dynamic.HTTPConfiguration{
Routers: map[string]*dynamic.Router{},
Middlewares: map[string]*dynamic.Middleware{},
Services: map[string]*dynamic.Service{},
ServersTransports: map[string]*dynamic.ServersTransport{},
},
},
},
{
desc: "two UDP service instances with one canary",
ConnectAware: true,
items: []itemData{
{
ID: "1",
Node: "Node1",
Datacenter: "dc1",
Name: "Test",
Namespace: "ns",
Labels: map[string]string{
"traefik.udp.routers.test.entrypoints": "udp",
},
Address: "127.0.0.1",
Port: "80",
Status: api.HealthPassing,
},
{
ID: "2",
Node: "Node1",
Datacenter: "dc1",
Name: "Test",
Namespace: "ns",
Labels: map[string]string{
"traefik.consulcatalog.canary": "true",
"traefik.udp.routers.test-canary.entrypoints": "udp",
},
Address: "127.0.0.2",
Port: "80",
Status: api.HealthPassing,
},
},
expected: &dynamic.Configuration{
TCP: &dynamic.TCPConfiguration{
Routers: map[string]*dynamic.TCPRouter{},
Middlewares: map[string]*dynamic.TCPMiddleware{},
Services: map[string]*dynamic.TCPService{},
},
UDP: &dynamic.UDPConfiguration{
Routers: map[string]*dynamic.UDPRouter{
"test": {
EntryPoints: []string{"udp"},
Service: "Test",
},
"test-canary": {
EntryPoints: []string{"udp"},
Service: "Test-12825244908842506376",
},
},
Services: map[string]*dynamic.UDPService{
"Test": {
LoadBalancer: &dynamic.UDPServersLoadBalancer{
Servers: []dynamic.UDPServer{
{Address: "127.0.0.1:80"},
},
},
},
"Test-12825244908842506376": {
LoadBalancer: &dynamic.UDPServersLoadBalancer{
Servers: []dynamic.UDPServer{
{Address: "127.0.0.2:80"},
},
},
},
},
},
HTTP: &dynamic.HTTPConfiguration{
Routers: map[string]*dynamic.Router{},
Middlewares: map[string]*dynamic.Middleware{},
Services: map[string]*dynamic.Service{},
ServersTransports: map[string]*dynamic.ServersTransport{},
},
},
},
}
for _, test := range testCases {
@ -2633,7 +2880,7 @@ func Test_buildConfiguration(t *testing.T) {
for i := 0; i < len(test.items); i++ {
var err error
test.items[i].ExtraConf, err = p.getConfiguration(test.items[i].Labels)
test.items[i].ExtraConf, err = p.getExtraConf(test.items[i].Labels)
require.NoError(t, err)
var tags []string

10
pkg/provider/consulcatalog/consul_catalog.go
View file

@ -283,13 +283,13 @@ func (p *Provider) getConsulServicesData(ctx context.Context) ([]itemData, error
for name, tags := range serviceNames {
logger := log.FromContext(log.With(ctx, log.Str("serviceName", name)))
svcCfg, err := p.getConfiguration(tagsToNeutralLabels(tags, p.Prefix))
extraConf, err := p.getExtraConf(tagsToNeutralLabels(tags, p.Prefix))
if err != nil {
logger.Errorf("Skip service: %v", err)
continue
}
if !svcCfg.Enable {
if !extraConf.Enable {
logger.Debug("Filtering disabled item")
continue
}
@ -305,12 +305,12 @@ func (p *Provider) getConsulServicesData(ctx context.Context) ([]itemData, error
continue
}
if !p.ConnectAware && svcCfg.ConsulCatalog.Connect {
if !p.ConnectAware && extraConf.ConsulCatalog.Connect {
logger.Debugf("Filtering out Connect aware item, Connect support is not enabled")
continue
}
consulServices, statuses, err := p.fetchService(ctx, name, svcCfg.ConsulCatalog.Connect)
consulServices, statuses, err := p.fetchService(ctx, name, extraConf.ConsulCatalog.Connect)
if err != nil {
return nil, err
}
@ -344,7 +344,7 @@ func (p *Provider) getConsulServicesData(ctx context.Context) ([]itemData, error
Status: status,
}
extraConf, err := p.getConfiguration(item.Labels)
extraConf, err := p.getExtraConf(item.Labels)
if err != nil {
log.FromContext(ctx).Errorf("Skip item %s: %v", item.Name, err)
continue

8
pkg/provider/consulcatalog/label.go
View file

@ -4,17 +4,19 @@ import (
"github.com/traefik/traefik/v2/pkg/config/label"
)
// configuration Contains information from the labels that are globals (not related to the dynamic configuration) or specific to the provider.
// configuration contains information from the labels that are globals (not related to the dynamic configuration) or specific to the provider.
type configuration struct {
Enable bool
ConsulCatalog specificConfiguration
}
type specificConfiguration struct {
Connect bool
Connect bool // <prefix>.consulcatalog.connect is the corresponding label.
Canary bool // <prefix>.consulcatalog.canary is the corresponding label.
}
func (p *Provider) getConfiguration(labels map[string]string) (configuration, error) {
// getExtraConf returns a configuration with settings which are not part of the dynamic configuration (e.g. "<prefix>.enable").
func (p *Provider) getExtraConf(labels map[string]string) (configuration, error) {
conf := configuration{
Enable: p.ExposedByDefault,
ConsulCatalog: specificConfiguration{Connect: p.ConnectByDefault},

26
pkg/provider/nomad/config.go
View file

@ -4,8 +4,11 @@ import (
"context"
"errors"
"fmt"
"hash/fnv"
"net"
"sort"
"strconv"
"strings"
"github.com/traefik/traefik/v2/pkg/config/dynamic"
"github.com/traefik/traefik/v2/pkg/config/label"
@ -76,7 +79,7 @@ func (p *Provider) buildConfig(ctx context.Context, items []item) *dynamic.Confi
Labels: labels,
}
provider.BuildRouterConfiguration(ctx, config.HTTP, provider.Normalize(i.Name), p.defaultRuleTpl, model)
provider.BuildRouterConfiguration(ctx, config.HTTP, getName(i), p.defaultRuleTpl, model)
configurations[svcName] = config
}
@ -90,7 +93,7 @@ func (p *Provider) buildTCPConfig(i item, configuration *dynamic.TCPConfiguratio
lb := new(dynamic.TCPServersLoadBalancer)
lb.SetDefaults()
configuration.Services[provider.Normalize(i.Name)] = &dynamic.TCPService{
configuration.Services[getName(i)] = &dynamic.TCPService{
LoadBalancer: lb,
}
}
@ -108,7 +111,7 @@ func (p *Provider) buildUDPConfig(i item, configuration *dynamic.UDPConfiguratio
if len(configuration.Services) == 0 {
configuration.Services = make(map[string]*dynamic.UDPService)
configuration.Services[provider.Normalize(i.Name)] = &dynamic.UDPService{
configuration.Services[getName(i)] = &dynamic.UDPService{
LoadBalancer: new(dynamic.UDPServersLoadBalancer),
}
}
@ -129,7 +132,7 @@ func (p *Provider) buildServiceConfig(i item, configuration *dynamic.HTTPConfigu
lb := new(dynamic.ServersLoadBalancer)
lb.SetDefaults()
configuration.Services[provider.Normalize(i.Name)] = &dynamic.Service{
configuration.Services[getName(i)] = &dynamic.Service{
LoadBalancer: lb,
}
}
@ -265,3 +268,18 @@ func (p *Provider) addServer(i item, lb *dynamic.ServersLoadBalancer) error {
return nil
}
func getName(i item) string {
if !i.ExtraConf.Canary {
return provider.Normalize(i.Name)
}
tags := make([]string, len(i.Tags))
copy(tags, i.Tags)
sort.Strings(tags)
hasher := fnv.New64()
hasher.Write([]byte(strings.Join(tags, "")))
return provider.Normalize(fmt.Sprintf("%s-%d", i.Name, hasher.Sum64()))
}

233
pkg/provider/nomad/config_test.go
View file

@ -2209,6 +2209,239 @@ func Test_buildConfig(t *testing.T) {
},
},
},
{
desc: "two HTTP service instances with one canary",
items: []item{
{
ID: "1",
Node: "Node1",
Datacenter: "dc1",
Name: "Test",
Namespace: "ns",
Tags: []string{},
Address: "127.0.0.1",
Port: 80,
ExtraConf: configuration{Enable: true},
},
{
ID: "2",
Node: "Node1",
Datacenter: "dc1",
Name: "Test",
Namespace: "ns",
Tags: []string{
"traefik.nomad.canary = true",
},
Address: "127.0.0.2",
Port: 80,
ExtraConf: configuration{
Enable: true,
Canary: true,
},
},
},
expected: &dynamic.Configuration{
TCP: &dynamic.TCPConfiguration{
Routers: map[string]*dynamic.TCPRouter{},
Middlewares: map[string]*dynamic.TCPMiddleware{},
Services: map[string]*dynamic.TCPService{},
},
UDP: &dynamic.UDPConfiguration{
Routers: map[string]*dynamic.UDPRouter{},
Services: map[string]*dynamic.UDPService{},
},
HTTP: &dynamic.HTTPConfiguration{
Routers: map[string]*dynamic.Router{
"Test": {
Service: "Test",
Rule: "Host(`Test.traefik.test`)",
},
"Test-1234154071633021619": {
Service: "Test-1234154071633021619",
Rule: "Host(`Test.traefik.test`)",
},
},
Middlewares: map[string]*dynamic.Middleware{},
Services: map[string]*dynamic.Service{
"Test": {
LoadBalancer: &dynamic.ServersLoadBalancer{
Servers: []dynamic.Server{
{
URL: "http://127.0.0.1:80",
},
},
PassHostHeader: Bool(true),
},
},
"Test-1234154071633021619": {
LoadBalancer: &dynamic.ServersLoadBalancer{
Servers: []dynamic.Server{
{
URL: "http://127.0.0.2:80",
},
},
PassHostHeader: Bool(true),
},
},
},
ServersTransports: map[string]*dynamic.ServersTransport{},
},
},
},
{
desc: "two TCP service instances with one canary",
items: []item{
{
ID: "1",
Node: "Node1",
Datacenter: "dc1",
Name: "Test",
Namespace: "ns",
Tags: []string{
"traefik.tcp.routers.test.rule = HostSNI(`foobar`)",
},
Address: "127.0.0.1",
Port: 80,
ExtraConf: configuration{Enable: true},
},
{
ID: "2",
Node: "Node1",
Datacenter: "dc1",
Name: "Test",
Namespace: "ns",
Tags: []string{
"traefik.nomad.canary = true",
"traefik.tcp.routers.test-canary.rule = HostSNI(`canary.foobar`)",
},
Address: "127.0.0.2",
Port: 80,
ExtraConf: configuration{
Enable: true,
Canary: true,
},
},
},
expected: &dynamic.Configuration{
TCP: &dynamic.TCPConfiguration{
Routers: map[string]*dynamic.TCPRouter{
"test": {
Service: "Test",
Rule: "HostSNI(`foobar`)",
},
"test-canary": {
Service: "Test-8769860286750522282",
Rule: "HostSNI(`canary.foobar`)",
},
},
Middlewares: map[string]*dynamic.TCPMiddleware{},
Services: map[string]*dynamic.TCPService{
"Test": {
LoadBalancer: &dynamic.TCPServersLoadBalancer{
Servers: []dynamic.TCPServer{
{Address: "127.0.0.1:80"},
},
TerminationDelay: Int(100),
},
},
"Test-8769860286750522282": {
LoadBalancer: &dynamic.TCPServersLoadBalancer{
Servers: []dynamic.TCPServer{
{Address: "127.0.0.2:80"},
},
TerminationDelay: Int(100),
},
},
},
},
UDP: &dynamic.UDPConfiguration{
Routers: map[string]*dynamic.UDPRouter{},
Services: map[string]*dynamic.UDPService{},
},
HTTP: &dynamic.HTTPConfiguration{
Routers: map[string]*dynamic.Router{},
Middlewares: map[string]*dynamic.Middleware{},
Services: map[string]*dynamic.Service{},
ServersTransports: map[string]*dynamic.ServersTransport{},
},
},
},
{
desc: "two UDP service instances with one canary",
items: []item{
{
ID: "1",
Node: "Node1",
Datacenter: "dc1",
Name: "Test",
Namespace: "ns",
Tags: []string{
"traefik.udp.routers.test.entrypoints = udp",
},
Address: "127.0.0.1",
Port: 80,
ExtraConf: configuration{Enable: true},
},
{
ID: "2",
Node: "Node1",
Datacenter: "dc1",
Name: "Test",
Namespace: "ns",
Tags: []string{
"traefik.nomad.canary = true",
"traefik.udp.routers.test-canary.entrypoints = udp",
},
Address: "127.0.0.2",
Port: 80,
ExtraConf: configuration{
Enable: true,
Canary: true,
},
},
},
expected: &dynamic.Configuration{
TCP: &dynamic.TCPConfiguration{
Routers: map[string]*dynamic.TCPRouter{},
Middlewares: map[string]*dynamic.TCPMiddleware{},
Services: map[string]*dynamic.TCPService{},
},
UDP: &dynamic.UDPConfiguration{
Routers: map[string]*dynamic.UDPRouter{
"test": {
EntryPoints: []string{"udp"},
Service: "Test",
},
"test-canary": {
EntryPoints: []string{"udp"},
Service: "Test-1611429260986126224",
},
},
Services: map[string]*dynamic.UDPService{
"Test": {
LoadBalancer: &dynamic.UDPServersLoadBalancer{
Servers: []dynamic.UDPServer{
{Address: "127.0.0.1:80"},
},
},
},
"Test-1611429260986126224": {
LoadBalancer: &dynamic.UDPServersLoadBalancer{
Servers: []dynamic.UDPServer{
{Address: "127.0.0.2:80"},
},
},
},
},
},
HTTP: &dynamic.HTTPConfiguration{
Routers: map[string]*dynamic.Router{},
Middlewares: map[string]*dynamic.Middleware{},
Services: map[string]*dynamic.Service{},
ServersTransports: map[string]*dynamic.ServersTransport{},
},
},
},
}
for _, test := range testCases {

22
pkg/provider/nomad/nomad.go
View file

@ -185,19 +185,25 @@ func createClient(namespace string, endpoint *EndpointConfig) (*api.Client, erro
// configuration contains information from the service's tags that are globals
// (not specific to the dynamic configuration).
type configuration struct {
Enable bool // <prefix>.enable
Enable bool // <prefix>.enable is the corresponding label.
Canary bool // <prefix>.nomad.canary is the corresponding label.
}
// globalConfig returns a configuration with settings not specific to the dynamic configuration (i.e. "<prefix>.enable").
func (p *Provider) globalConfig(tags []string) configuration {
enabled := p.ExposedByDefault
// getExtraConf returns a configuration with settings which are not part of the dynamic configuration (e.g. "<prefix>.enable").
func (p *Provider) getExtraConf(tags []string) configuration {
labels := tagsToLabels(tags, p.Prefix)
enabled := p.ExposedByDefault
if v, exists := labels["traefik.enable"]; exists {
enabled = strings.EqualFold(v, "true")
}
return configuration{Enable: enabled}
var canary bool
if v, exists := labels["traefik.nomad.canary"]; exists {
canary = strings.EqualFold(v, "true")
}
return configuration{Enable: enabled, Canary: canary}
}
func (p *Provider) getNomadServiceData(ctx context.Context) ([]item, error) {
@ -216,8 +222,8 @@ func (p *Provider) getNomadServiceData(ctx context.Context) ([]item, error) {
for _, service := range stub.Services {
logger := log.FromContext(log.With(ctx, log.Str("serviceName", service.ServiceName)))
globalCfg := p.globalConfig(service.Tags)
if !globalCfg.Enable {
extraConf := p.getExtraConf(service.Tags)
if !extraConf.Enable {
logger.Debug("Filter Nomad service that is not enabled")
continue
}
@ -248,7 +254,7 @@ func (p *Provider) getNomadServiceData(ctx context.Context) ([]item, error) {
Address: i.Address,
Port: i.Port,
Tags: i.Tags,
ExtraConf: p.globalConfig(i.Tags),
ExtraConf: p.getExtraConf(i.Tags),
})
}
}

2
pkg/provider/nomad/nomad_test.go
View file

@ -65,7 +65,7 @@ func Test_globalConfig(t *testing.T) {
for _, test := range cases {
t.Run(test.Name, func(t *testing.T) {
p := Provider{ExposedByDefault: test.ExposedByDefault, Prefix: test.Prefix}
result := p.globalConfig(test.Tags)
result := p.getExtraConf(test.Tags)
require.Equal(t, test.exp, result)
})
}