consul

Documentation

Index

• Variables
• type Discovery
  • func NewDiscovery(conf *SDConfig, logger log.Logger) (*Discovery, error)
  • func (d *Discovery) Run(ctx context.Context, ch chan<- []*targetgroup.Group)
• type SDConfig
  • func (c *SDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error

Variables

var (

	// DefaultSDConfig is the default Consul SD configuration.
	DefaultSDConfig = SDConfig{
		TagSeparator:    ",",
		Scheme:          "http",
		Server:          "localhost:8500",
		AllowStale:      true,
		RefreshInterval: model.Duration(watchTimeout),
	}
)

Types

type Discovery

type Discovery struct {
	// contains filtered or unexported fields
}

Discovery retrieves target information from a Consul server and updates them via watches.

func NewDiscovery

func NewDiscovery(conf *SDConfig, logger log.Logger) (*Discovery, error)

NewDiscovery returns a new Discovery for the given config.

func (*Discovery) Run

func (d *Discovery) Run(ctx context.Context, ch chan<- []*targetgroup.Group)

Run implements the Discoverer interface.

type SDConfig

type SDConfig struct {
	Server       string             `yaml:"server,omitempty"`
	Token        config_util.Secret `yaml:"token,omitempty"`
	Datacenter   string             `yaml:"datacenter,omitempty"`
	TagSeparator string             `yaml:"tag_separator,omitempty"`
	Scheme       string             `yaml:"scheme,omitempty"`
	Username     string             `yaml:"username,omitempty"`
	Password     config_util.Secret `yaml:"password,omitempty"`

	// See https://www.consul.io/docs/internals/consensus.html#consistency-modes,
	// stale reads are a lot cheaper and are a necessity if you have >5k targets.
	AllowStale bool `yaml:"allow_stale"`
	// By default use blocking queries (https://www.consul.io/api/index.html#blocking-queries)
	// but allow users to throttle updates if necessary. This can be useful because of "bugs" like
	// https://github.com/hashicorp/consul/issues/3712 which cause an un-necessary
	// amount of requests on consul.
	RefreshInterval model.Duration `yaml:"refresh_interval,omitempty"`

	// See https://www.consul.io/api/catalog.html#list-services
	// The list of services for which targets are discovered.
	// Defaults to all services if empty.
	Services []string `yaml:"services"`
	// An optional tag used to filter instances inside a service. A single tag is supported
	// here to match the Consul API.
	ServiceTag string `yaml:"tag,omitempty"`
	// Desired node metadata.
	NodeMeta map[string]string `yaml:"node_meta,omitempty"`

	TLSConfig config_util.TLSConfig `yaml:"tls_config,omitempty"`
}

SDConfig is the configuration for Consul service discovery.

func (*SDConfig) UnmarshalYAML

func (c *SDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML implements the yaml.Unmarshaler interface.