mirror of
https://github.com/prometheus/alertmanager
synced 2024-12-14 02:15:27 +00:00
013177e2d0
Update membership Update common (support HTTP/2 client) Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
350 lines
9.1 KiB
Go
350 lines
9.1 KiB
Go
// Copyright 2018 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package client
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"net/http"
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"net/url"
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"time"
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"github.com/prometheus/client_golang/api"
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"github.com/prometheus/alertmanager/config"
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"github.com/prometheus/alertmanager/types"
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)
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const (
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apiPrefix = "/api/v1"
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epStatus = apiPrefix + "/status"
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epSilence = apiPrefix + "/silence/:id"
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epSilences = apiPrefix + "/silences"
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epAlerts = apiPrefix + "/alerts"
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statusSuccess = "success"
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statusError = "error"
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)
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// ServerStatus represents the status of the AlertManager endpoint.
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type ServerStatus struct {
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ConfigYAML string `json:"configYAML"`
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ConfigJSON *config.Config `json:"configJSON"`
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VersionInfo map[string]string `json:"versionInfo"`
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Uptime time.Time `json:"uptime"`
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ClusterStatus *ClusterStatus `json:"clusterStatus"`
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}
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// PeerStatus represents the status of a peer in the cluster.
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type PeerStatus struct {
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Name string `json:"name"`
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Address string `json:"address"`
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}
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// ClusterStatus represents the status of the cluster.
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type ClusterStatus struct {
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Name string `json:"name"`
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Status string `json:"status"`
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Peers []PeerStatus `json:"peers"`
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}
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// apiClient wraps a regular client and processes successful API responses.
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// Successful also includes responses that errored at the API level.
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type apiClient struct {
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api.Client
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}
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type apiResponse struct {
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Status string `json:"status"`
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Data json.RawMessage `json:"data,omitempty"`
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ErrorType string `json:"errorType,omitempty"`
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Error string `json:"error,omitempty"`
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}
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type clientError struct {
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code int
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msg string
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}
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func (e *clientError) Error() string {
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return fmt.Sprintf("%s (code: %d)", e.msg, e.code)
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}
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func (c apiClient) Do(ctx context.Context, req *http.Request) (*http.Response, []byte, error) {
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resp, body, err := c.Client.Do(ctx, req)
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if err != nil {
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return resp, body, err
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}
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code := resp.StatusCode
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var result apiResponse
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if err = json.Unmarshal(body, &result); err != nil {
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// Pass the returned body rather than the JSON error because some API
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// endpoints return plain text instead of JSON payload.
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return resp, body, &clientError{
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code: code,
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msg: string(body),
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}
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}
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if (code/100 == 2) && (result.Status != statusSuccess) {
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return resp, body, &clientError{
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code: code,
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msg: "inconsistent body for response code",
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}
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}
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if result.Status == statusError {
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err = &clientError{
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code: code,
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msg: result.Error,
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}
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}
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return resp, []byte(result.Data), err
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}
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// StatusAPI provides bindings for the Alertmanager's status API.
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type StatusAPI interface {
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// Get returns the server's configuration, version, uptime and cluster information.
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Get(ctx context.Context) (*ServerStatus, error)
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}
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// NewStatusAPI returns a status API client.
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func NewStatusAPI(c api.Client) StatusAPI {
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return &httpStatusAPI{client: apiClient{c}}
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}
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type httpStatusAPI struct {
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client api.Client
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}
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func (h *httpStatusAPI) Get(ctx context.Context) (*ServerStatus, error) {
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u := h.client.URL(epStatus, nil)
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req, err := http.NewRequest(http.MethodGet, u.String(), nil)
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if err != nil {
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return nil, fmt.Errorf("error creating request: %v", err)
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}
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_, body, err := h.client.Do(ctx, req)
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if err != nil {
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return nil, err
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}
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var ss *ServerStatus
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err = json.Unmarshal(body, &ss)
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return ss, err
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}
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// AlertAPI provides bindings for the Alertmanager's alert API.
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type AlertAPI interface {
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// List returns all the active alerts.
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List(ctx context.Context, filter, receiver string, silenced, inhibited, active, unprocessed bool) ([]*ExtendedAlert, error)
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// Push sends a list of alerts to the Alertmanager.
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Push(ctx context.Context, alerts ...Alert) error
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}
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// Alert represents an alert as expected by the AlertManager's push alert API.
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type Alert struct {
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Labels LabelSet `json:"labels"`
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Annotations LabelSet `json:"annotations"`
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StartsAt time.Time `json:"startsAt,omitempty"`
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EndsAt time.Time `json:"endsAt,omitempty"`
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GeneratorURL string `json:"generatorURL"`
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}
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// ExtendedAlert represents an alert as returned by the AlertManager's list alert API.
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type ExtendedAlert struct {
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Alert
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Status types.AlertStatus `json:"status"`
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Receivers []string `json:"receivers"`
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Fingerprint string `json:"fingerprint"`
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}
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// LabelSet represents a collection of label names and values as a map.
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type LabelSet map[LabelName]LabelValue
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// LabelName represents the name of a label.
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type LabelName string
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// LabelValue represents the value of a label.
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type LabelValue string
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// NewAlertAPI returns a new AlertAPI for the client.
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func NewAlertAPI(c api.Client) AlertAPI {
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return &httpAlertAPI{client: apiClient{c}}
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}
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type httpAlertAPI struct {
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client api.Client
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}
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func (h *httpAlertAPI) List(ctx context.Context, filter, receiver string, silenced, inhibited, active, unprocessed bool) ([]*ExtendedAlert, error) {
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u := h.client.URL(epAlerts, nil)
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params := url.Values{}
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if filter != "" {
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params.Add("filter", filter)
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}
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params.Add("silenced", fmt.Sprintf("%t", silenced))
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params.Add("inhibited", fmt.Sprintf("%t", inhibited))
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params.Add("active", fmt.Sprintf("%t", active))
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params.Add("unprocessed", fmt.Sprintf("%t", unprocessed))
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params.Add("receiver", receiver)
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u.RawQuery = params.Encode()
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req, err := http.NewRequest(http.MethodGet, u.String(), nil)
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if err != nil {
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return nil, fmt.Errorf("error creating request: %v", err)
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}
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_, body, err := h.client.Do(ctx, req) // ignoring warnings.
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if err != nil {
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return nil, err
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}
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var alts []*ExtendedAlert
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err = json.Unmarshal(body, &alts)
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return alts, err
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}
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func (h *httpAlertAPI) Push(ctx context.Context, alerts ...Alert) error {
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u := h.client.URL(epAlerts, nil)
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var buf bytes.Buffer
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if err := json.NewEncoder(&buf).Encode(&alerts); err != nil {
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return err
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}
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req, err := http.NewRequest(http.MethodPost, u.String(), &buf)
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if err != nil {
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return fmt.Errorf("error creating request: %v", err)
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}
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_, _, err = h.client.Do(ctx, req)
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return err
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}
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// SilenceAPI provides bindings for the Alertmanager's silence API.
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type SilenceAPI interface {
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// Get returns the silence associated with the given ID.
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Get(ctx context.Context, id string) (*types.Silence, error)
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// Set updates or creates the given silence and returns its ID.
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Set(ctx context.Context, sil types.Silence) (string, error)
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// Expire expires the silence with the given ID.
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Expire(ctx context.Context, id string) error
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// List returns silences matching the given filter.
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List(ctx context.Context, filter string) ([]*types.Silence, error)
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}
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// NewSilenceAPI returns a new SilenceAPI for the client.
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func NewSilenceAPI(c api.Client) SilenceAPI {
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return &httpSilenceAPI{client: apiClient{c}}
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}
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type httpSilenceAPI struct {
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client api.Client
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}
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func (h *httpSilenceAPI) Get(ctx context.Context, id string) (*types.Silence, error) {
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u := h.client.URL(epSilence, map[string]string{
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"id": id,
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})
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req, err := http.NewRequest(http.MethodGet, u.String(), nil)
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if err != nil {
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return nil, fmt.Errorf("error creating request: %v", err)
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}
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_, body, err := h.client.Do(ctx, req)
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if err != nil {
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return nil, err
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}
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var sil types.Silence
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err = json.Unmarshal(body, &sil)
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return &sil, err
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}
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func (h *httpSilenceAPI) Expire(ctx context.Context, id string) error {
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u := h.client.URL(epSilence, map[string]string{
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"id": id,
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})
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req, err := http.NewRequest(http.MethodDelete, u.String(), nil)
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if err != nil {
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return fmt.Errorf("error creating request: %v", err)
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}
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_, _, err = h.client.Do(ctx, req)
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return err
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}
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func (h *httpSilenceAPI) Set(ctx context.Context, sil types.Silence) (string, error) {
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u := h.client.URL(epSilences, nil)
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var buf bytes.Buffer
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if err := json.NewEncoder(&buf).Encode(&sil); err != nil {
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return "", err
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}
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req, err := http.NewRequest(http.MethodPost, u.String(), &buf)
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if err != nil {
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return "", fmt.Errorf("error creating request: %v", err)
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}
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_, body, err := h.client.Do(ctx, req)
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if err != nil {
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return "", err
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}
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var res struct {
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SilenceID string `json:"silenceId"`
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}
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err = json.Unmarshal(body, &res)
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return res.SilenceID, err
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}
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func (h *httpSilenceAPI) List(ctx context.Context, filter string) ([]*types.Silence, error) {
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u := h.client.URL(epSilences, nil)
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params := url.Values{}
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if filter != "" {
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params.Add("filter", filter)
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}
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u.RawQuery = params.Encode()
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req, err := http.NewRequest(http.MethodGet, u.String(), nil)
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if err != nil {
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return nil, fmt.Errorf("error creating request: %v", err)
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}
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_, body, err := h.client.Do(ctx, req)
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if err != nil {
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return nil, err
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}
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var sils []*types.Silence
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err = json.Unmarshal(body, &sils)
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return sils, err
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}
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