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manager.go
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manager.go
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package manager
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"regexp"
"strconv"
"time"
"github.com/prometheus/common/model"
alertconfig "github.com/rancher/rancher/pkg/controllers/user/alert/config"
"github.com/rancher/types/apis/core/v1"
"github.com/rancher/types/config"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/selection"
)
type AlertState string
const (
AlertStateUnprocessed AlertState = "unprocessed"
AlertStateActive = "active"
AlertStateSuppressed = "suppressed"
)
type AlertStatus struct {
State AlertState `json:"state"`
SilencedBy []string `json:"silencedBy"`
InhibitedBy []string `json:"inhibitedBy"`
}
type APIAlert struct {
*model.Alert
Status AlertStatus `json:"status"`
Receivers []string `json:"receivers"`
Fingerprint string `json:"fingerprint"`
}
type Matchers []*Matcher
type Matcher struct {
Name string `json:"name"`
Value string `json:"value"`
IsRegex bool `json:"isRegex"`
regex *regexp.Regexp
}
type Silence struct {
ID string `json:"id"`
Matchers Matchers `json:"matchers"`
StartsAt time.Time `json:"startsAt"`
EndsAt time.Time `json:"endsAt"`
UpdatedAt time.Time `json:"updatedAt"`
CreatedBy string `json:"createdBy"`
Comment string `json:"comment,omitempty"`
now func() time.Time
Status SilenceStatus `json:"status"`
}
type SilenceStatus struct {
State SilenceState `json:"state"`
}
type SilenceState string
const (
SilenceStateExpired SilenceState = "expired"
SilenceStateActive SilenceState = "active"
SilenceStatePending SilenceState = "pending"
)
type Manager struct {
nodeLister v1.NodeLister
svcLister v1.ServiceLister
podLister v1.PodLister
IsDeploy bool
}
func NewManager(cluster *config.UserContext) *Manager {
return &Manager{
nodeLister: cluster.Core.Nodes("").Controller().Lister(),
svcLister: cluster.Core.Services("").Controller().Lister(),
podLister: cluster.Core.Pods("").Controller().Lister(),
IsDeploy: false,
}
}
//TODO: optimized this
func (m *Manager) getAlertManagerEndpoint() (string, error) {
selector := labels.NewSelector()
r, _ := labels.NewRequirement("app", selection.Equals, []string{"alertmanager"})
selector = selector.Add(*r)
pods, err := m.podLister.List("cattle-alerting", selector)
if err != nil {
return "", err
}
if len(pods) == 0 {
return "", fmt.Errorf("the alert manager pod does not exist yet")
}
node, err := m.nodeLister.Get("", pods[0].Spec.NodeName)
if err != nil {
return "", err
}
//TODO: check correct way to make call to alertManager
if len(node.Status.Addresses) == 0 {
return "", err
}
ip := node.Status.Addresses[0].Address
svc, err := m.svcLister.Get("cattle-alerting", "alertmanager-svc")
if err != nil {
return "", fmt.Errorf("Failed to get service for alertmanager")
}
port := svc.Spec.Ports[0].NodePort
url := "http://" + ip + ":" + strconv.Itoa(int(port))
return url, nil
}
func (m *Manager) GetDefaultConfig() *alertconfig.Config {
config := alertconfig.Config{}
resolveTimeout, _ := model.ParseDuration("5m")
config.Global = &alertconfig.GlobalConfig{
SlackAPIURL: "slack_api_url",
ResolveTimeout: resolveTimeout,
SMTPRequireTLS: false,
}
slackConfigs := []*alertconfig.SlackConfig{}
initSlackConfig := &alertconfig.SlackConfig{
Channel: "#alert",
}
slackConfigs = append(slackConfigs, initSlackConfig)
receivers := []*alertconfig.Receiver{}
initReceiver := &alertconfig.Receiver{
Name: "rancherlabs",
SlackConfigs: slackConfigs,
}
receivers = append(receivers, initReceiver)
config.Receivers = receivers
groupWait, _ := model.ParseDuration("1m")
groupInterval, _ := model.ParseDuration("10s")
repeatInterval, _ := model.ParseDuration("1h")
config.Route = &alertconfig.Route{
Receiver: "rancherlabs",
GroupWait: &groupWait,
GroupInterval: &groupInterval,
RepeatInterval: &repeatInterval,
}
config.Templates = []string{"/etc/alertmanager/email.tmpl"}
return &config
}
func (m *Manager) GetAlertList() ([]*APIAlert, error) {
url, err := m.getAlertManagerEndpoint()
if err != nil {
return nil, err
}
res := struct {
Data []*APIAlert `json:"data"`
Status string `json:"status"`
}{}
req, err := http.NewRequest(http.MethodGet, url+"/api/v1/alerts", nil)
if err != nil {
return nil, err
}
//q := req.URL.Query()
//q.Add("filter", fmt.Sprintf("{%s}", filter))
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
requestBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
if err := json.Unmarshal(requestBytes, &res); err != nil {
return nil, err
}
return res.Data, nil
}
func (m *Manager) GetState(alertID string, apiAlerts []*APIAlert) string {
for _, a := range apiAlerts {
if string(a.Labels["alert_id"]) == alertID {
if a.Status.State == "suppressed" {
return "muted"
}
return "alerting"
}
}
return "active"
}
func (m *Manager) AddSilenceRule(alertID string) error {
url, err := m.getAlertManagerEndpoint()
if err != nil {
return err
}
matchers := []*model.Matcher{}
m1 := &model.Matcher{
Name: "alert_id",
Value: alertID,
IsRegex: false,
}
matchers = append(matchers, m1)
now := time.Now()
endsAt := now.AddDate(100, 0, 0)
silence := model.Silence{
Matchers: matchers,
StartsAt: now,
EndsAt: endsAt,
CreatedAt: now,
CreatedBy: "rancherlabs",
Comment: "silence",
}
silenceData, err := json.Marshal(silence)
if err != nil {
return err
}
resp, err := http.Post(url+"/api/v1/silences", "application/json", bytes.NewBuffer(silenceData))
if err != nil {
return err
}
defer resp.Body.Close()
_, err = ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
return nil
}
func (m *Manager) RemoveSilenceRule(alertID string) error {
url, err := m.getAlertManagerEndpoint()
if err != nil {
return err
}
res := struct {
Data []*Silence `json:"data"`
Status string `json:"status"`
}{}
req, err := http.NewRequest(http.MethodGet, url+"/api/v1/silences", nil)
if err != nil {
return err
}
q := req.URL.Query()
q.Add("filter", fmt.Sprintf("{%s}", "alert_id="+alertID))
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
requestBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
if err := json.Unmarshal(requestBytes, &res); err != nil {
return err
}
if res.Status != "success" {
return fmt.Errorf("Failed to get silence rules for alert")
}
for _, s := range res.Data {
if s.Status.State == SilenceStateActive {
delReq, err := http.NewRequest(http.MethodDelete, url+"/api/v1/silence/"+s.ID, nil)
if err != nil {
return err
}
delResp, err := client.Do(delReq)
if err != nil {
return err
}
defer delResp.Body.Close()
_, err = ioutil.ReadAll(delResp.Body)
if err != nil {
return err
}
}
}
return nil
}
func (m *Manager) SendAlert(alertID, text, title, severity string) error {
url, err := m.getAlertManagerEndpoint()
if err != nil {
return err
}
alertList := model.Alerts{}
a := &model.Alert{}
a.Labels = map[model.LabelName]model.LabelValue{}
a.Labels[model.LabelName("alert_id")] = model.LabelValue(alertID)
a.Labels[model.LabelName("text")] = model.LabelValue(text)
a.Labels[model.LabelName("title")] = model.LabelValue(title)
a.Labels[model.LabelName("severity")] = model.LabelValue(severity)
alertList = append(alertList, a)
alertData, err := json.Marshal(alertList)
if err != nil {
return err
}
resp, err := http.Post(url+"/api/alerts", "application/json", bytes.NewBuffer(alertData))
if err != nil {
return err
}
defer resp.Body.Close()
_, err = ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
return nil
}