apiserver

package
Version: v0.0.0-...-8ff1004 Latest Latest
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Published: Feb 15, 2019 License: AGPL-3.0 Imports: 181 Imported by: 0

Documentation

Index

Constants

View Source
const MetricLabelEndpoint = "endpoint"

MetricLabelEndpoint defines a constant for the APIConnections abd PingFailureCount Labels

View Source
const MetricLabelModelUUID = "model_uuid"

MetricLabelModelUUID defines a constant for the PingFailureCount and LogWriteCount Labels Note: prometheus doesn't allow hyphens only underscores

View Source
const MetricLabelState = "state"

MetricLabelState defines a constant for the LogWriteCount Label

Variables

View Source
var MaintenanceNoLoginError = errors.New("login failed - maintenance in progress")
View Source
var MetricAPIConnectionsLabelNames = []string{
	MetricLabelEndpoint,
}

MetricAPIConnectionsLabelNames defines a series of labels for the APIConnections metric.

View Source
var MetricLogLabelNames = []string{
	MetricLabelModelUUID,
	MetricLabelState,
}

MetricLogLabelNames defines a series of labels for the LogWrite and LogRead metric

View Source
var MetricPingFailureLabelNames = []string{
	MetricLabelModelUUID,
	MetricLabelEndpoint,
}

MetricPingFailureLabelNames defines a series of labels for the PingFailure metric.

Functions

func AdminFacadeDetails

func AdminFacadeDetails() []facade.Details

AdminFacadeDetails returns information on the Admin facade provided at login time. The Facade field of the returned slice elements will be nil.

func AllFacades

func AllFacades() *facade.Registry

AllFacades returns a registry containing all known API facades.

This will panic if facade registration fails, but there is a unit test to guard against that.

func DescribeFacades

func DescribeFacades(registry *facade.Registry) []params.FacadeVersions

DescribeFacades returns the list of available Facades and their Versions

func IsAnonymousFacade

func IsAnonymousFacade(facadeName string) bool

IsAnonymousFacade reports whether the given facade name can be accessed using an anonymous connection.

func IsControllerFacade

func IsControllerFacade(facadeName string) bool

IsControllerFacade reports whether the given facade name can be accessed using a controller connection.

func IsMethodAllowedDuringMigration

func IsMethodAllowedDuringMigration(facadeName, methodName string) bool

func IsMethodAllowedDuringUpgrade

func IsMethodAllowedDuringUpgrade(facadeName, methodName string) bool

func IsModelFacade

func IsModelFacade(facadeName string) bool

IsModelFacade reports whether the given facade name can be accessed using a model connection.

func NewAllWatcher

func NewAllWatcher(context facade.Context) (facade.Facade, error)

NewAllWatcher returns a new API server endpoint for interacting with a watcher created by the WatchAll and WatchAllModels API calls.

Types

type CharmsHTTPHandler

type CharmsHTTPHandler struct {
	PostHandler FailableHandlerFunc
	GetHandler  FailableHandlerFunc
}

CharmsHTTPHandler creates is a http.Handler which serves POST requests to a PostHandler and GET requests to a GetHandler.

TODO(katco): This is the beginning of inverting the dependencies in this callstack by splitting out the serving mechanism from the modules that are processing the requests. The next step is to publically expose construction of a suitable PostHandler and GetHandler whose goals should be clearly called out in their names, (e.g. charmPersitAPI for POSTs).

To accomplish this, we'll have to make the httpContext type public so that we can pass it into these public functions.

After we do this, we can then test the individual funcs/structs without standing up an entire HTTP server. I.e. actual unit tests. If you're in this area and can, please chissle away at this problem and update this TODO as needed! Many thanks, hacker!

func (*CharmsHTTPHandler) ServeHTTP

func (h *CharmsHTTPHandler) ServeHTTP(w http.ResponseWriter, r *http.Request)

type Collector

type Collector struct {
	TotalConnections   prometheus.Counter
	LoginAttempts      prometheus.Gauge
	APIConnections     *prometheus.GaugeVec
	APIRequestDuration *prometheus.SummaryVec
	PingFailureCount   *prometheus.CounterVec
	LogWriteCount      *prometheus.CounterVec
	LogReadCount       *prometheus.CounterVec

	DeprecatedAPIConnections     prometheus.Gauge
	DeprecatedAPIRequestsTotal   *prometheus.CounterVec
	DeprecatedAPIRequestDuration *prometheus.SummaryVec
}

Collector is a prometheus.Collector that collects metrics based on apiserver status.

func NewMetricsCollector

func NewMetricsCollector() *Collector

NewMetricsCollector returns a new Collector.

func (*Collector) Collect

func (c *Collector) Collect(ch chan<- prometheus.Metric)

Collect is part of the prometheus.Collector interface.

func (*Collector) Describe

func (c *Collector) Describe(ch chan<- *prometheus.Desc)

Describe is part of the prometheus.Collector interface.

type EntitiesWatcher

type EntitiesWatcher interface {
	state.StringsWatcher

	// MapChanges maps the received strings to their according tag strings.
	// The EntityFinder interface representing state or a mock has to be
	// upcasted into the needed sub-interface of state for the real mapping.
	MapChanges(in []string) ([]string, error)
}

EntitiesWatcher defines an interface based on the StringsWatcher but also providing a method for the mapping of the received strings to the tags of the according entities.

type FailableHandlerFunc

type FailableHandlerFunc func(http.ResponseWriter, *http.Request) error

type Hub

type Hub interface {
	Publish(string, interface{}) (<-chan struct{}, error)
}

Hub defines the publish method that the handler uses to publish messages on the centralhub of the apiserver.

type LogSinkConfig

type LogSinkConfig struct {
	// DBLoggerBufferSize is the capacity of the database logger's buffer.
	DBLoggerBufferSize int

	// DBLoggerFlushInterval is the amount of time to allow a log record
	// to sit in the buffer before being flushed to the database.
	DBLoggerFlushInterval time.Duration

	// RateLimitBurst defines the number of log messages that will be let
	// through before we start rate limiting.
	RateLimitBurst int64

	// RateLimitRefill defines the rate at which log messages will be let
	// through once the initial burst amount has been depleted.
	RateLimitRefill time.Duration
}

LogSinkConfig holds parameters to control the API server's logsink endpoint behaviour.

func DefaultLogSinkConfig

func DefaultLogSinkConfig() LogSinkConfig

DefaultLogSinkConfig returns a LogSinkConfig with default values.

func (LogSinkConfig) Validate

func (cfg LogSinkConfig) Validate() error

Validate validates the logsink endpoint configuration.

type Pinger

type Pinger interface {
	Ping()
	Stop() error
}

pinger describes a resource that can be pinged and stopped.

func NewPinger

func NewPinger(st *state.State, resources facade.Resources, authorizer facade.Authorizer) (Pinger, error)

NewPinger returns an object that can be pinged by calling its Ping method. If this method is not called frequently enough, the connection will be dropped.

type RateLimitConfig

type RateLimitConfig struct {
	LoginRateLimit     int
	LoginMinPause      time.Duration
	LoginMaxPause      time.Duration
	LoginRetryPause    time.Duration
	ConnMinPause       time.Duration
	ConnMaxPause       time.Duration
	ConnLookbackWindow time.Duration
	ConnLowerThreshold int
	ConnUpperThreshold int
}

RateLimitConfig holds parameters to control aspects of rate limiting connections and logins.

func DefaultRateLimitConfig

func DefaultRateLimitConfig() RateLimitConfig

DefaultRateLimitConfig returns a RateLimtConfig struct with all attributes set to their default values.

func (RateLimitConfig) Validate

func (c RateLimitConfig) Validate() error

Validate validates the rate limit configuration. We apply arbitrary but sensible upper limits to prevent typos from introducing obviously bad config.

type ResourcesBackend

type ResourcesBackend interface {
	// OpenResource returns the identified resource and its content.
	OpenResource(applicationID, name string) (resource.Resource, io.ReadCloser, error)

	// GetResource returns the identified resource.
	GetResource(applicationID, name string) (resource.Resource, error)

	// GetPendingResource returns the identified resource.
	GetPendingResource(applicationID, name, pendingID string) (resource.Resource, error)

	// SetResource adds the resource to blob storage and updates the metadata.
	SetResource(applicationID, userID string, res charmresource.Resource, r io.Reader) (resource.Resource, error)

	// UpdatePendingResource adds the resource to blob storage and updates the metadata.
	UpdatePendingResource(applicationID, pendingID, userID string, res charmresource.Resource, r io.Reader) (resource.Resource, error)
}

ResourcesBackend is the functionality of Juju's state needed for the resources API.

type ResourcesHandler

type ResourcesHandler struct {
	StateAuthFunc func(*http.Request, ...string) (ResourcesBackend, state.PoolHelper, names.Tag, error)
}

ResourcesHandler is the HTTP handler for client downloads and uploads of resources.

func (*ResourcesHandler) ServeHTTP

func (h *ResourcesHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request)

ServeHTTP implements http.Handler.

type RestHTTPHandler

type RestHTTPHandler struct {
	GetHandler FailableHandlerFunc
}

RestHTTPHandler creates is a http.Handler which serves ReST requests.

func (*RestHTTPHandler) ServeHTTP

func (h *RestHTTPHandler) ServeHTTP(w http.ResponseWriter, r *http.Request)

ServeHTTP is defined on handler.Handler.

type Server

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

Server holds the server side of the API.

func NewServer

func NewServer(cfg ServerConfig) (*Server, error)

NewServer serves API requests using the given configuration.

func (*Server) Dead

func (srv *Server) Dead() <-chan struct{}

Dead returns a channel that signals when the server has exited.

func (*Server) GetAuditConfig

func (srv *Server) GetAuditConfig() auditlog.Config

GetAuditConfig returns a copy of the current audit logging configuration.

func (*Server) Kill

func (srv *Server) Kill()

Kill implements worker.Worker.Kill.

func (*Server) Stop

func (srv *Server) Stop() error

Stop stops the server and returns when all running requests have completed.

func (*Server) Wait

func (srv *Server) Wait() error

Wait implements worker.Worker.Wait.

type ServerConfig

type ServerConfig struct {
	Clock         clock.Clock
	PingClock     clock.Clock
	Tag           names.Tag
	DataDir       string
	LogDir        string
	Hub           *pubsub.StructuredHub
	Presence      presence.Recorder
	Mux           *apiserverhttp.Mux
	Authenticator httpcontext.LocalMacaroonAuthenticator

	// StatePool is the StatePool used for looking up State
	// to pass to facades. StatePool will not be closed by the
	// server; it is the callers responsibility to close it
	// after the apiserver has exited.
	StatePool *state.StatePool

	// Controller is the in-memory representation of the models
	// in the controller. It is kept up to date with an all model
	// watcher and the modelcache worker.
	Controller *cache.Controller

	// UpgradeComplete is a function that reports whether or not
	// the if the agent running the API server has completed
	// running upgrade steps. This is used by the API server to
	// limit logins during upgrades.
	UpgradeComplete func() bool

	// RestoreStatus is a function that reports the restore
	// status most recently observed by the agent running the
	// API server. This is used by the API server to limit logins
	// during a restore.
	RestoreStatus func() state.RestoreStatus

	// PublicDNSName is reported to the API clients who connect.
	PublicDNSName string

	// AllowModelAccess holds whether users will be allowed to
	// access models that they have access rights to even when
	// they don't have access to the controller.
	AllowModelAccess bool

	// NewObserver is a function which will return an observer. This
	// is used per-connection to instantiate a new observer to be
	// notified of key events during API requests.
	NewObserver observer.ObserverFactory

	// RegisterIntrospectionHandlers is a function that will
	// call a function with (path, http.Handler) tuples. This
	// is to support registering the handlers underneath the
	// "/introspection" prefix.
	RegisterIntrospectionHandlers func(func(string, http.Handler))

	// RateLimitConfig holds parameters to control
	// aspects of rate limiting connections and logins.
	RateLimitConfig RateLimitConfig

	// LogSinkConfig holds parameters to control the API server's
	// logsink endpoint behaviour. If this is nil, the values from
	// DefaultLogSinkConfig() will be used.
	LogSinkConfig *LogSinkConfig

	// GetAuditConfig holds a function that returns the current audit
	// logging config. The function may return updated values, so
	// should be called every time a new login is handled.
	GetAuditConfig func() auditlog.Config

	// LeaseManager gives access to leadership and singular claimers
	// and checkers for use in API facades.
	LeaseManager lease.Manager

	// MetricsCollector defines all the metrics to be collected for the
	// apiserver
	MetricsCollector *Collector
}

ServerConfig holds parameters required to set up an API server.

func (ServerConfig) Validate

func (c ServerConfig) Validate() error

Validate validates the API server configuration.

type SharedHub

type SharedHub interface {
	Publish(topic string, data interface{}) (<-chan struct{}, error)
	Subscribe(topic string, handler interface{}) (func(), error)
}

SharedHub represents the methods of the pubsub.StructuredHub that are used. The context uses an interface to allow mocking of the hub.

type SrvAllWatcher

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

SrvAllWatcher defines the API methods on a state.Multiwatcher. which watches any changes to the state. Each client has its own current set of watchers, stored in resources. It is used by both the AllWatcher and AllModelWatcher facades.

func (*SrvAllWatcher) Next

func (*SrvAllWatcher) Stop

func (w *SrvAllWatcher) Stop() error

Stop stops the watcher.

type UnitResourcesHandler

type UnitResourcesHandler struct {
	NewOpener func(*http.Request, ...string) (resource.Opener, state.PoolHelper, error)
}

UnitResourcesHandler is the HTTP handler for unit agent downloads of resources.

func (*UnitResourcesHandler) ServeHTTP

func (h *UnitResourcesHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request)

ServeHTTP implements http.Handler.

Directories

Path Synopsis
mocks
Package mocks is a generated GoMock package.
Package mocks is a generated GoMock package.
storagecommon
Package storagecommon provides common storage-related services for API server facades.
Package storagecommon provides common storage-related services for API server facades.
mocks
Package mocks is a generated GoMock package.
Package mocks is a generated GoMock package.
facades
agent/hostkeyreporter
Package hostkeyreporter implements the API facade used by the hostkeyreporter worker.
Package hostkeyreporter implements the API facade used by the hostkeyreporter worker.
agent/machine
The machiner package implements the API interface used by the machiner worker.
The machiner package implements the API interface used by the machiner worker.
agent/machineactions
machineactions implements the the apiserver side of running actions on machines
machineactions implements the the apiserver side of running actions on machines
agent/meterstatus
Package meterstatus provides the meter status API facade.
Package meterstatus provides the meter status API facade.
agent/meterstatus/mocks
Package mocks is a generated GoMock package.
Package mocks is a generated GoMock package.
agent/metricsender
Package metricsender contains functions for sending metrics from a controller to a remote metric collector.
Package metricsender contains functions for sending metrics from a controller to a remote metric collector.
agent/migrationminion
Package migrationminion defines the API facade for use by the migration minion worker to monitor the progress of, and interact with, model migrations.
Package migrationminion defines the API facade for use by the migration minion worker to monitor the progress of, and interact with, model migrations.
agent/provisioner/mocks
Package mocks is a generated GoMock package.
Package mocks is a generated GoMock package.
agent/uniter
Package uniter implements the API interface used by the uniter worker.
Package uniter implements the API interface used by the uniter worker.
agent/uniter/mocks
Package mocks is a generated GoMock package.
Package mocks is a generated GoMock package.
client/application
Package application contains api calls for functionality related to deploying and managing applications and their related charms.
Package application contains api calls for functionality related to deploying and managing applications and their related charms.
client/application/mocks
Package mocks is a generated GoMock package.
Package mocks is a generated GoMock package.
client/bundle
Package bundle defines an API endpoint for functions dealing with bundles.
Package bundle defines an API endpoint for functions dealing with bundles.
client/cloud
Package cloud defines an API end point for functions dealing with the controller's cloud definition, and cloud credentials.
Package cloud defines an API end point for functions dealing with the controller's cloud definition, and cloud credentials.
client/controller
The controller package defines an API end point for functions dealing with controllers as a whole.
The controller package defines an API end point for functions dealing with controllers as a whole.
client/metricsdebug
Package metricsdebug contains the implementation of an api endpoint for metrics debug functionality.
Package metricsdebug contains the implementation of an api endpoint for metrics debug functionality.
client/modelgeneration/mocks
Package mocks is a generated GoMock package.
Package mocks is a generated GoMock package.
client/modelmanager
Package modelmanager defines an API end point for functions dealing with models.
Package modelmanager defines an API end point for functions dealing with models.
client/sshclient
Package sshclient implements the API endpoint required for Juju clients that wish to make SSH connections to Juju managed machines.
Package sshclient implements the API endpoint required for Juju clients that wish to make SSH connections to Juju managed machines.
client/storage
Package storage provides an API server facade for managing storage entities.
Package storage provides an API server facade for managing storage entities.
controller/metricsmanager
Package metricsmanager contains the implementation of an api endpoint for calling metrics functions in state.
Package metricsmanager contains the implementation of an api endpoint for calling metrics functions in state.
controller/migrationmaster
This package defines the API facade for use by the migration master worker when communicating to it's own controller.
This package defines the API facade for use by the migration master worker when communicating to it's own controller.
controller/migrationtarget
This package defines the API facade for use by the migration master worker when interacting with the target controller during a migration.
This package defines the API facade for use by the migration master worker when interacting with the target controller during a migration.
controller/resumer
The resumer package implements the API interface used by the resumer worker.
The resumer package implements the API interface used by the resumer worker.
Package httpattachment provides facilities for attaching a streaming blob of data and associated metadata to an HTTP API request, and for reading that blob on the server side.
Package httpattachment provides facilities for attaching a streaming blob of data and associated metadata to an HTTP API request, and for reading that blob on the server side.
mocks
Package mocks is a generated GoMock package.
Package mocks is a generated GoMock package.
metricobserver
Package metricobserver provides an implementation of apiserver/observer.ObserverFactory that maintains Prometheus metrics.
Package metricobserver provides an implementation of apiserver/observer.ObserverFactory that maintains Prometheus metrics.
metricobserver/mocks
Package mocks is a generated GoMock package.
Package mocks is a generated GoMock package.

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