83 lines
2.5 KiB
Go
83 lines
2.5 KiB
Go
package consul
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import (
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"errors"
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"github.com/kvtools/valkeyrie/store"
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"github.com/traefik/traefik/v2/pkg/log"
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"github.com/traefik/traefik/v2/pkg/provider"
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"github.com/traefik/traefik/v2/pkg/provider/kv"
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)
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// providerName is the Consul provider name.
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const providerName = "consul"
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var _ provider.Provider = (*Provider)(nil)
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// ProviderBuilder is responsible for constructing namespaced instances of the Consul provider.
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type ProviderBuilder struct {
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kv.Provider `export:"true"`
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// Deprecated: use Namespaces instead.
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Namespace string `description:"Sets the namespace used to discover the configuration (Consul Enterprise only)." json:"namespace,omitempty" toml:"namespace,omitempty" yaml:"namespace,omitempty"`
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Namespaces []string `description:"Sets the namespaces used to discover the configuration (Consul Enterprise only)." json:"namespaces,omitempty" toml:"namespaces,omitempty" yaml:"namespaces,omitempty"`
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}
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// SetDefaults sets the default values.
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func (p *ProviderBuilder) SetDefaults() {
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p.Provider.SetDefaults()
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p.Endpoints = []string{"127.0.0.1:8500"}
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}
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// BuildProviders builds Consul provider instances for the given namespaces configuration.
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func (p *ProviderBuilder) BuildProviders() []*Provider {
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// We can warn about that, because we've already made sure before that
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// Namespace and Namespaces are mutually exclusive.
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if p.Namespace != "" {
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log.WithoutContext().Warnf("Namespace option is deprecated, please use the Namespaces option instead.")
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}
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if len(p.Namespaces) == 0 {
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return []*Provider{{
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Provider: p.Provider,
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name: providerName,
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// p.Namespace could very well be empty.
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namespace: p.Namespace,
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}}
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}
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var providers []*Provider
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for _, namespace := range p.Namespaces {
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providers = append(providers, &Provider{
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Provider: p.Provider,
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name: providerName + "-" + namespace,
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namespace: namespace,
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})
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}
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return providers
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}
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// Provider holds configurations of the provider.
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type Provider struct {
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kv.Provider
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name string
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namespace string
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}
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// Init the provider.
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func (p *Provider) Init() error {
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// Wildcard namespace allows fetching KV values from any namespace for recursive requests (see https://www.consul.io/api/kv#ns).
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// As we are not supporting multiple namespaces at the same time, wildcard namespace is not allowed.
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if p.namespace == "*" {
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return errors.New("wildcard namespace is not supported")
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}
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// In case they didn't initialize with BuildProviders.
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if p.name == "" {
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p.name = providerName
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}
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return p.Provider.Init(store.CONSUL, p.name, p.namespace)
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}
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