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Support multiple namespaces for Consul and ConsulCatalog providers

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Co-authored-by: Kevin Pollet <pollet.kevin@gmail.com>
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Romain 2022-06-03 12:00:09 +02:00 • committed by GitHub
parent f352c34136
commit f90e3817e8
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28 changed files with 531 additions and 152 deletions
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60
pkg/provider/kv/consul/consul.go
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@ -4,30 +4,80 @@ import (
"errors"
"github.com/kvtools/valkeyrie/store"
"github.com/traefik/traefik/v2/pkg/log"
"github.com/traefik/traefik/v2/pkg/provider"
"github.com/traefik/traefik/v2/pkg/provider/kv"
)
// providerName is the Consul provider name.
const providerName = "consul"
var _ provider.Provider = (*Provider)(nil)
// Provider holds configurations of the provider.
type Provider struct {
// ProviderBuilder is responsible for constructing namespaced instances of the Consul provider.
type ProviderBuilder struct {
kv.Provider `export:"true"`
// Deprecated: use Namespaces instead.
Namespace string `description:"Sets the namespace used to discover the configuration (Consul Enterprise only)." json:"namespace,omitempty" toml:"namespace,omitempty" yaml:"namespace,omitempty"`
Namespaces []string `description:"Sets the namespaces used to discover the configuration (Consul Enterprise only)." json:"namespaces,omitempty" toml:"namespaces,omitempty" yaml:"namespaces,omitempty"`
}
// SetDefaults sets the default values.
func (p *Provider) SetDefaults() {
func (p *ProviderBuilder) SetDefaults() {
p.Provider.SetDefaults()
p.Endpoints = []string{"127.0.0.1:8500"}
}
// BuildProviders builds Consul provider instances for the given namespaces configuration.
func (p *ProviderBuilder) BuildProviders() []*Provider {
// We can warn about that, because we've already made sure before that
// Namespace and Namespaces are mutually exclusive.
if p.Namespace != "" {
log.WithoutContext().Warnf("Namespace option is deprecated, please use the Namespaces option instead.")
}
if len(p.Namespaces) == 0 {
return []*Provider{{
Provider: p.Provider,
name: providerName,
// p.Namespace could very well be empty.
namespace: p.Namespace,
}}
}
var providers []*Provider
for _, namespace := range p.Namespaces {
providers = append(providers, &Provider{
Provider: p.Provider,
name: providerName + "-" + namespace,
namespace: namespace,
})
}
return providers
}
// Provider holds configurations of the provider.
type Provider struct {
kv.Provider
name string
namespace string
}
// Init the provider.
func (p *Provider) Init() error {
// Wildcard namespace allows fetching KV values from any namespace for recursive requests (see https://www.consul.io/api/kv#ns).
// As we are not supporting multiple namespaces at the same time, wildcard namespace is not allowed.
if p.Namespace == "*" {
if p.namespace == "*" {
return errors.New("wildcard namespace is not supported")
}
return p.Provider.Init(store.CONSUL, "consul")
// In case they didn't initialize with BuildProviders.
if p.name == "" {
p.name = providerName
}
return p.Provider.Init(store.CONSUL, p.name, p.namespace)
}