consul

package
v0.10.3 Latest Latest
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 Go to latest Published: Jan 29, 2020 License: MPL-2.0 Imports: 20 Imported by: 0

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Index

Constants

View Source 
const (

	// DefaultQueryWaitDuration is the max duration the Consul Agent will
	// spend waiting for a response from a Consul Query.
	DefaultQueryWaitDuration = 2 * time.Second

	// ServiceTagHTTP is the tag assigned to HTTP services
	ServiceTagHTTP = "http"

	// ServiceTagRPC is the tag assigned to RPC services
	ServiceTagRPC = "rpc"

	// ServiceTagSerf is the tag assigned to Serf services
	ServiceTagSerf = "serf"
)

Variables

This section is empty.

Functions

func MakeAllocServiceID added in v0.10.2 

func MakeAllocServiceID(allocID, taskName string, service *structs.Service) string

MakeAllocServiceID creates a unique ID for identifying an alloc service in Consul. 

Example Service ID: _nomad-task-b4e61df9-b095-d64e-f241-23860da1375f-redis-http-http

func MakeCheckID added in v0.10.0 

func MakeCheckID(serviceID string, check *structs.ServiceCheck) string

MakeCheckID creates a unique ID for a check. 

Example Check ID: _nomad-check-434ae42f9a57c5705344974ac38de2aee0ee089d

Types

type AgentAPI added in v0.6.0 

type AgentAPI interface {
	Services() (map[string]*api.AgentService, error)
	Checks() (map[string]*api.AgentCheck, error)
	CheckRegister(check *api.AgentCheckRegistration) error
	CheckDeregister(checkID string) error
	Self() (map[string]map[string]interface{}, error)
	ServiceRegister(service *api.AgentServiceRegistration) error
	ServiceDeregister(serviceID string) error
	UpdateTTL(id, output, status string) error
}

AgentAPI is the consul/api.Agent API used by Nomad.

type AllocRegistration added in v0.6.1 

type AllocRegistration struct {
	// Tasks maps the name of a task to its registered services and checks
	Tasks map[string]*ServiceRegistrations
}

AllocRegistration holds the status of services registered for a particular allocations by task.

func (*AllocRegistration) NumChecks added in v0.6.1 

func (a *AllocRegistration) NumChecks() int

NumChecks returns the number of registered checks

func (*AllocRegistration) NumServices added in v0.6.1 

func (a *AllocRegistration) NumServices() int

NumServices returns the number of registered services

type CatalogAPI added in v0.6.0 

type CatalogAPI interface {
	Datacenters() ([]string, error)
	Service(service, tag string, q *api.QueryOptions) ([]*api.CatalogService, *api.QueryMeta, error)
}

CatalogAPI is the consul/api.Catalog API used by Nomad.

type ChecksAPI added in v0.7.0 

type ChecksAPI interface {
	// Checks returns a list of all checks.
	Checks() (map[string]*api.AgentCheck, error)
}

ChecksAPI is the part of the Consul API the checkWatcher requires.

type MockAgent added in v0.7.0 

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

MockAgent is a fake in-memory Consul backend for ServiceClient.

func NewMockAgent added in v0.7.0 

func NewMockAgent() *MockAgent

NewMockAgent that returns all checks as passing.

func (*MockAgent) CheckDeregister added in v0.7.0 

func (c *MockAgent) CheckDeregister(checkID string) error

func (*MockAgent) CheckRegister added in v0.7.0 

func (c *MockAgent) CheckRegister(check *api.AgentCheckRegistration) error

func (*MockAgent) CheckRegs added in v0.7.1 

func (c *MockAgent) CheckRegs() []*api.AgentCheckRegistration

CheckRegs returns the raw AgentCheckRegistrations registered with this mock agent.

func (*MockAgent) Checks added in v0.7.0 

func (c *MockAgent) Checks() (map[string]*api.AgentCheck, error)

Checks implements the Agent API Checks method.

func (*MockAgent) Self added in v0.8.0 

func (c *MockAgent) Self() (map[string]map[string]interface{}, error)

func (*MockAgent) ServiceDeregister added in v0.7.0 

func (c *MockAgent) ServiceDeregister(serviceID string) error

func (*MockAgent) ServiceRegister added in v0.7.0 

func (c *MockAgent) ServiceRegister(service *api.AgentServiceRegistration) error

func (*MockAgent) Services added in v0.7.0 

func (c *MockAgent) Services() (map[string]*api.AgentService, error)

func (*MockAgent) SetStatus added in v0.7.0 

func (c *MockAgent) SetStatus(s string) string

SetStatus that Checks() should return. Returns old status value.

func (*MockAgent) UpdateTTL added in v0.7.0 

func (c *MockAgent) UpdateTTL(id string, output string, status string) error

type MockCatalog added in v0.6.0 

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

MockCatalog can be used for testing where the CatalogAPI is needed.

func NewMockCatalog added in v0.6.0 

func NewMockCatalog(l log.Logger) *MockCatalog

func (*MockCatalog) Datacenters added in v0.6.0 

func (m *MockCatalog) Datacenters() ([]string, error)

func (*MockCatalog) Service added in v0.6.0 

func (m *MockCatalog) Service(service, tag string, q *api.QueryOptions) ([]*api.CatalogService, *api.QueryMeta, error)

type ServiceClient added in v0.6.0 

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

ServiceClient handles task and agent service registration with Consul.

func NewServiceClient added in v0.6.0 

func NewServiceClient(consulClient AgentAPI, logger log.Logger, isNomadClient bool) *ServiceClient

NewServiceClient creates a new Consul ServiceClient from an existing Consul API Client, logger and takes whether the client is being used by a Nomad Client agent. When being used by a Nomad client, this Consul client reconciles all services and checks created by Nomad on behalf of running tasks.

func (*ServiceClient) AllocRegistrations added in v0.6.1 

func (c *ServiceClient) AllocRegistrations(allocID string) (*AllocRegistration, error)

AllocRegistrations returns the registrations for the given allocation. If the allocation has no reservations, the response is a nil object.

func (*ServiceClient) RegisterAgent added in v0.6.0 

func (c *ServiceClient) RegisterAgent(role string, services []*structs.Service) error

RegisterAgent registers Nomad agents (client or server). The Service.PortLabel should be a literal port to be parsed with SplitHostPort. Script checks are not supported and will return an error. Registration is asynchronous.

Agents will be deregistered when Shutdown is called.

func (*ServiceClient) RegisterWorkload added in v0.10.2 

func (c *ServiceClient) RegisterWorkload(workload *WorkloadServices) error

RegisterWorkload with Consul. Adds all service entries and checks to Consul.

If the service IP is set it used as the address in the service registration. Checks will always use the IP from the Task struct (host's IP).

Actual communication with Consul is done asynchronously (see Run).

func (*ServiceClient) RemoveWorkload added in v0.10.2 

func (c *ServiceClient) RemoveWorkload(workload *WorkloadServices)

RemoveWorkload from Consul. Removes all service entries and checks.

Actual communication with Consul is done asynchronously (see Run).

func (*ServiceClient) Run added in v0.6.0 

func (c *ServiceClient) Run()

Run the Consul main loop which retries operations against Consul. It should be called exactly once.

func (*ServiceClient) Shutdown added in v0.6.0 

func (c *ServiceClient) Shutdown() error

Shutdown the Consul client. Update running task registrations and deregister agent from Consul. On first call blocks up to shutdownWait before giving up on syncing operations.

func (*ServiceClient) UpdateTTL added in v0.10.0 

func (c *ServiceClient) UpdateTTL(id, output, status string) error

UpdateTTL is used to update the TTL of a check. Typically this will only be called to heartbeat script checks.

func (*ServiceClient) UpdateWorkload added in v0.10.2 

func (c *ServiceClient) UpdateWorkload(old, newWorkload *WorkloadServices) error

UpdateWorkload in Consul. Does not alter the service if only checks have changed.

DriverNetwork must not change between invocations for the same allocation.

type ServiceRegistration added in v0.6.1 

type ServiceRegistration struct {

	// Service is the AgentService registered in Consul.
	Service *api.AgentService

	// Checks is the status of the registered checks.
	Checks []*api.AgentCheck
	// contains filtered or unexported fields
}

ServiceRegistration holds the status of a registered Consul Service and its Checks.

type ServiceRegistrations added in v0.10.2 

type ServiceRegistrations struct {
	Services map[string]*ServiceRegistration
}

ServiceRegistrations holds the status of services registered for a particular task or task group.

type WorkloadRestarter added in v0.10.2 

type WorkloadRestarter interface {
	Restart(ctx context.Context, event *structs.TaskEvent, failure bool) error
}

WorkloadRestarter allows the checkWatcher to restart tasks or entire task groups.

func NoopRestarter added in v0.10.2 

func NoopRestarter() WorkloadRestarter

type WorkloadServices added in v0.10.2 

type WorkloadServices struct {
	AllocID string

	// Name of the task and task group the services are defined for. For
	// group based services, Task will be empty
	Task  string
	Group string

	// Canary indicates whether or not the allocation is a canary
	Canary bool

	// Restarter allows restarting the task or task group depending on the
	// check_restart stanzas.
	Restarter WorkloadRestarter

	// Services and checks to register for the task.
	Services []*structs.Service

	// Networks from the task's resources stanza.
	Networks structs.Networks

	// DriverExec is the script executor for the task's driver.
	// For group services this is nil and script execution is managed by
	// a tasklet in the taskrunner script_check_hook
	DriverExec interfaces.ScriptExecutor

	// DriverNetwork is the network specified by the driver and may be nil.
	DriverNetwork *drivers.DriverNetwork
}

WorkloadServices describes services defined in either a Task or TaskGroup that need to be syncronized with Consul

func BuildAllocServices added in v0.10.2 

func BuildAllocServices(node *structs.Node, alloc *structs.Allocation, restarter WorkloadRestarter) *WorkloadServices

func (*WorkloadServices) Copy added in v0.10.2 

func (t *WorkloadServices) Copy() *WorkloadServices

Copy method for easing tests

func (*WorkloadServices) Name added in v0.10.2 

func (w *WorkloadServices) Name() string

Source Files

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