Split the notifier package into smaller source files. Signed-off-by: Siavash Safi <siavash@cloudflare.com>pull/16398/head
Siavash Safi
3 months ago
parent
8ad21d0659
commit
ef48e4cb9f
@ -0,0 +1,91 @@ |
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// Copyright 2013 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 notifier |
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import ( |
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"fmt" |
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"time" |
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"github.com/prometheus/prometheus/model/labels" |
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"github.com/prometheus/prometheus/model/relabel" |
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) |
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// Alert is a generic representation of an alert in the Prometheus eco-system.
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type Alert struct { |
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// Label value pairs for purpose of aggregation, matching, and disposition
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// dispatching. This must minimally include an "alertname" label.
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Labels labels.Labels `json:"labels"` |
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// Extra key/value information which does not define alert identity.
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Annotations labels.Labels `json:"annotations"` |
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// The known time range for this alert. Both ends are optional.
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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,omitempty"` |
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} |
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// Name returns the name of the alert. It is equivalent to the "alertname" label.
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func (a *Alert) Name() string { |
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return a.Labels.Get(labels.AlertName) |
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} |
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// Hash returns a hash over the alert. It is equivalent to the alert labels hash.
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func (a *Alert) Hash() uint64 { |
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return a.Labels.Hash() |
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} |
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func (a *Alert) String() string { |
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s := fmt.Sprintf("%s[%s]", a.Name(), fmt.Sprintf("%016x", a.Hash())[:7]) |
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if a.Resolved() { |
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return s + "[resolved]" |
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} |
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return s + "[active]" |
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} |
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// Resolved returns true iff the activity interval ended in the past.
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func (a *Alert) Resolved() bool { |
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return a.ResolvedAt(time.Now()) |
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} |
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// ResolvedAt returns true iff the activity interval ended before
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// the given timestamp.
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func (a *Alert) ResolvedAt(ts time.Time) bool { |
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if a.EndsAt.IsZero() { |
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return false |
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} |
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return !a.EndsAt.After(ts) |
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} |
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func relabelAlerts(relabelConfigs []*relabel.Config, externalLabels labels.Labels, alerts []*Alert) []*Alert { |
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lb := labels.NewBuilder(labels.EmptyLabels()) |
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var relabeledAlerts []*Alert |
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for _, a := range alerts { |
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lb.Reset(a.Labels) |
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externalLabels.Range(func(l labels.Label) { |
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if a.Labels.Get(l.Name) == "" { |
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lb.Set(l.Name, l.Value) |
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} |
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}) |
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keep := relabel.ProcessBuilder(lb, relabelConfigs...) |
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if !keep { |
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continue |
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} |
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a.Labels = lb.Labels() |
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relabeledAlerts = append(relabeledAlerts, a) |
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} |
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return relabeledAlerts |
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} |
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@ -0,0 +1,90 @@ |
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// Copyright 2013 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 notifier |
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import ( |
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"fmt" |
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"net/url" |
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"path" |
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"github.com/prometheus/common/model" |
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"github.com/prometheus/prometheus/config" |
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"github.com/prometheus/prometheus/discovery/targetgroup" |
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"github.com/prometheus/prometheus/model/labels" |
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"github.com/prometheus/prometheus/model/relabel" |
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) |
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// Alertmanager holds Alertmanager endpoint information.
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type alertmanager interface { |
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url() *url.URL |
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} |
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type alertmanagerLabels struct{ labels.Labels } |
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const pathLabel = "__alerts_path__" |
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func (a alertmanagerLabels) url() *url.URL { |
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return &url.URL{ |
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Scheme: a.Get(model.SchemeLabel), |
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Host: a.Get(model.AddressLabel), |
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Path: a.Get(pathLabel), |
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} |
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} |
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// AlertmanagerFromGroup extracts a list of alertmanagers from a target group
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// and an associated AlertmanagerConfig.
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func AlertmanagerFromGroup(tg *targetgroup.Group, cfg *config.AlertmanagerConfig) ([]alertmanager, []alertmanager, error) { |
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var res []alertmanager |
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var droppedAlertManagers []alertmanager |
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lb := labels.NewBuilder(labels.EmptyLabels()) |
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for _, tlset := range tg.Targets { |
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lb.Reset(labels.EmptyLabels()) |
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for ln, lv := range tlset { |
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lb.Set(string(ln), string(lv)) |
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} |
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// Set configured scheme as the initial scheme label for overwrite.
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lb.Set(model.SchemeLabel, cfg.Scheme) |
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lb.Set(pathLabel, postPath(cfg.PathPrefix, cfg.APIVersion)) |
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// Combine target labels with target group labels.
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for ln, lv := range tg.Labels { |
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if _, ok := tlset[ln]; !ok { |
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lb.Set(string(ln), string(lv)) |
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} |
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} |
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preRelabel := lb.Labels() |
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keep := relabel.ProcessBuilder(lb, cfg.RelabelConfigs...) |
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if !keep { |
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droppedAlertManagers = append(droppedAlertManagers, alertmanagerLabels{preRelabel}) |
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continue |
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} |
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addr := lb.Get(model.AddressLabel) |
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if err := config.CheckTargetAddress(model.LabelValue(addr)); err != nil { |
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return nil, nil, err |
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} |
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res = append(res, alertmanagerLabels{lb.Labels()}) |
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} |
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return res, droppedAlertManagers, nil |
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} |
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func postPath(pre string, v config.AlertmanagerAPIVersion) string { |
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alertPushEndpoint := fmt.Sprintf("/api/%v/alerts", string(v)) |
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return path.Join("/", pre, alertPushEndpoint) |
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} |
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@ -0,0 +1,62 @@ |
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// Copyright 2013 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 notifier |
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import ( |
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"testing" |
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"github.com/stretchr/testify/require" |
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"github.com/prometheus/prometheus/config" |
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) |
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func TestPostPath(t *testing.T) { |
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cases := []struct { |
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in, out string |
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}{ |
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{ |
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in: "", |
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out: "/api/v2/alerts", |
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}, |
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{ |
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in: "/", |
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out: "/api/v2/alerts", |
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}, |
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{ |
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in: "/prefix", |
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out: "/prefix/api/v2/alerts", |
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}, |
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{ |
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in: "/prefix//", |
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out: "/prefix/api/v2/alerts", |
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}, |
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{ |
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in: "prefix//", |
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out: "/prefix/api/v2/alerts", |
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}, |
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} |
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for _, c := range cases { |
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require.Equal(t, c.out, postPath(c.in, config.AlertmanagerAPIVersionV2)) |
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} |
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} |
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func TestLabelSetNotReused(t *testing.T) { |
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tg := makeInputTargetGroup() |
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_, _, err := AlertmanagerFromGroup(tg, &config.AlertmanagerConfig{}) |
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require.NoError(t, err) |
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// Target modified during alertmanager extraction
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require.Equal(t, tg, makeInputTargetGroup()) |
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} |
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@ -0,0 +1,128 @@ |
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// Copyright 2013 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 notifier |
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import ( |
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"crypto/md5" |
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"encoding/hex" |
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"log/slog" |
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"net/http" |
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"sync" |
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config_util "github.com/prometheus/common/config" |
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"github.com/prometheus/sigv4" |
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"gopkg.in/yaml.v2" |
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"github.com/prometheus/prometheus/config" |
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"github.com/prometheus/prometheus/discovery/targetgroup" |
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) |
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// alertmanagerSet contains a set of Alertmanagers discovered via a group of service
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// discovery definitions that have a common configuration on how alerts should be sent.
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type alertmanagerSet struct { |
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cfg *config.AlertmanagerConfig |
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client *http.Client |
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metrics *alertMetrics |
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mtx sync.RWMutex |
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ams []alertmanager |
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droppedAms []alertmanager |
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logger *slog.Logger |
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} |
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func newAlertmanagerSet(cfg *config.AlertmanagerConfig, logger *slog.Logger, metrics *alertMetrics) (*alertmanagerSet, error) { |
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client, err := config_util.NewClientFromConfig(cfg.HTTPClientConfig, "alertmanager") |
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if err != nil { |
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return nil, err |
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} |
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t := client.Transport |
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if cfg.SigV4Config != nil { |
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t, err = sigv4.NewSigV4RoundTripper(cfg.SigV4Config, client.Transport) |
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if err != nil { |
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return nil, err |
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} |
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} |
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client.Transport = t |
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s := &alertmanagerSet{ |
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client: client, |
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cfg: cfg, |
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logger: logger, |
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metrics: metrics, |
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} |
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return s, nil |
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} |
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// sync extracts a deduplicated set of Alertmanager endpoints from a list
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// of target groups definitions.
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func (s *alertmanagerSet) sync(tgs []*targetgroup.Group) { |
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allAms := []alertmanager{} |
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allDroppedAms := []alertmanager{} |
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for _, tg := range tgs { |
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ams, droppedAms, err := AlertmanagerFromGroup(tg, s.cfg) |
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if err != nil { |
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s.logger.Error("Creating discovered Alertmanagers failed", "err", err) |
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continue |
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} |
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allAms = append(allAms, ams...) |
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allDroppedAms = append(allDroppedAms, droppedAms...) |
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} |
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s.mtx.Lock() |
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defer s.mtx.Unlock() |
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previousAms := s.ams |
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// Set new Alertmanagers and deduplicate them along their unique URL.
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s.ams = []alertmanager{} |
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s.droppedAms = []alertmanager{} |
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s.droppedAms = append(s.droppedAms, allDroppedAms...) |
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seen := map[string]struct{}{} |
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for _, am := range allAms { |
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us := am.url().String() |
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if _, ok := seen[us]; ok { |
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continue |
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} |
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// This will initialize the Counters for the AM to 0.
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s.metrics.sent.WithLabelValues(us) |
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s.metrics.errors.WithLabelValues(us) |
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seen[us] = struct{}{} |
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s.ams = append(s.ams, am) |
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} |
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// Now remove counters for any removed Alertmanagers.
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for _, am := range previousAms { |
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us := am.url().String() |
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if _, ok := seen[us]; ok { |
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continue |
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} |
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s.metrics.latency.DeleteLabelValues(us) |
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s.metrics.sent.DeleteLabelValues(us) |
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s.metrics.errors.DeleteLabelValues(us) |
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seen[us] = struct{}{} |
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} |
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} |
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func (s *alertmanagerSet) configHash() (string, error) { |
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b, err := yaml.Marshal(s.cfg) |
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if err != nil { |
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return "", err |
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} |
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hash := md5.Sum(b) |
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return hex.EncodeToString(hash[:]), nil |
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} |
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@ -0,0 +1,94 @@ |
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// Copyright 2013 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 notifier |
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import "github.com/prometheus/client_golang/prometheus" |
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type alertMetrics struct { |
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latency *prometheus.SummaryVec |
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errors *prometheus.CounterVec |
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sent *prometheus.CounterVec |
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dropped prometheus.Counter |
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queueLength prometheus.GaugeFunc |
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queueCapacity prometheus.Gauge |
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alertmanagersDiscovered prometheus.GaugeFunc |
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} |
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func newAlertMetrics(r prometheus.Registerer, queueCap int, queueLen, alertmanagersDiscovered func() float64) *alertMetrics { |
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m := &alertMetrics{ |
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latency: prometheus.NewSummaryVec(prometheus.SummaryOpts{ |
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Namespace: namespace, |
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Subsystem: subsystem, |
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Name: "latency_seconds", |
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Help: "Latency quantiles for sending alert notifications.", |
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Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001}, |
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}, |
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[]string{alertmanagerLabel}, |
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), |
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errors: prometheus.NewCounterVec(prometheus.CounterOpts{ |
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Namespace: namespace, |
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Subsystem: subsystem, |
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Name: "errors_total", |
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Help: "Total number of sent alerts affected by errors.", |
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}, |
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[]string{alertmanagerLabel}, |
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), |
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sent: prometheus.NewCounterVec(prometheus.CounterOpts{ |
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Namespace: namespace, |
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Subsystem: subsystem, |
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Name: "sent_total", |
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Help: "Total number of alerts sent.", |
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}, |
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[]string{alertmanagerLabel}, |
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), |
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dropped: prometheus.NewCounter(prometheus.CounterOpts{ |
||||||
|
Namespace: namespace, |
||||||
|
Subsystem: subsystem, |
||||||
|
Name: "dropped_total", |
||||||
|
Help: "Total number of alerts dropped due to errors when sending to Alertmanager.", |
||||||
|
}), |
||||||
|
queueLength: prometheus.NewGaugeFunc(prometheus.GaugeOpts{ |
||||||
|
Namespace: namespace, |
||||||
|
Subsystem: subsystem, |
||||||
|
Name: "queue_length", |
||||||
|
Help: "The number of alert notifications in the queue.", |
||||||
|
}, queueLen), |
||||||
|
queueCapacity: prometheus.NewGauge(prometheus.GaugeOpts{ |
||||||
|
Namespace: namespace, |
||||||
|
Subsystem: subsystem, |
||||||
|
Name: "queue_capacity", |
||||||
|
Help: "The capacity of the alert notifications queue.", |
||||||
|
}), |
||||||
|
alertmanagersDiscovered: prometheus.NewGaugeFunc(prometheus.GaugeOpts{ |
||||||
|
Name: "prometheus_notifications_alertmanagers_discovered", |
||||||
|
Help: "The number of alertmanagers discovered and active.", |
||||||
|
}, alertmanagersDiscovered), |
||||||
|
} |
||||||
|
|
||||||
|
m.queueCapacity.Set(float64(queueCap)) |
||||||
|
|
||||||
|
if r != nil { |
||||||
|
r.MustRegister( |
||||||
|
m.latency, |
||||||
|
m.errors, |
||||||
|
m.sent, |
||||||
|
m.dropped, |
||||||
|
m.queueLength, |
||||||
|
m.queueCapacity, |
||||||
|
m.alertmanagersDiscovered, |
||||||
|
) |
||||||
|
} |
||||||
|
|
||||||
|
return m |
||||||
|
} |
||||||
@ -0,0 +1,49 @@ |
|||||||
|
// Copyright 2013 The Prometheus Authors
|
||||||
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||||||
|
// you may not use this file except in compliance with the License.
|
||||||
|
// You may obtain a copy of the License at
|
||||||
|
//
|
||||||
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||||||
|
//
|
||||||
|
// Unless required by applicable law or agreed to in writing, software
|
||||||
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||||||
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
|
// See the License for the specific language governing permissions and
|
||||||
|
// limitations under the License.
|
||||||
|
|
||||||
|
package notifier |
||||||
|
|
||||||
|
import ( |
||||||
|
"github.com/go-openapi/strfmt" |
||||||
|
"github.com/prometheus/alertmanager/api/v2/models" |
||||||
|
|
||||||
|
"github.com/prometheus/prometheus/model/labels" |
||||||
|
) |
||||||
|
|
||||||
|
func alertsToOpenAPIAlerts(alerts []*Alert) models.PostableAlerts { |
||||||
|
openAPIAlerts := models.PostableAlerts{} |
||||||
|
for _, a := range alerts { |
||||||
|
start := strfmt.DateTime(a.StartsAt) |
||||||
|
end := strfmt.DateTime(a.EndsAt) |
||||||
|
openAPIAlerts = append(openAPIAlerts, &models.PostableAlert{ |
||||||
|
Annotations: labelsToOpenAPILabelSet(a.Annotations), |
||||||
|
EndsAt: end, |
||||||
|
StartsAt: start, |
||||||
|
Alert: models.Alert{ |
||||||
|
GeneratorURL: strfmt.URI(a.GeneratorURL), |
||||||
|
Labels: labelsToOpenAPILabelSet(a.Labels), |
||||||
|
}, |
||||||
|
}) |
||||||
|
} |
||||||
|
|
||||||
|
return openAPIAlerts |
||||||
|
} |
||||||
|
|
||||||
|
func labelsToOpenAPILabelSet(modelLabelSet labels.Labels) models.LabelSet { |
||||||
|
apiLabelSet := models.LabelSet{} |
||||||
|
modelLabelSet.Range(func(label labels.Label) { |
||||||
|
apiLabelSet[label.Name] = label.Value |
||||||
|
}) |
||||||
|
|
||||||
|
return apiLabelSet |
||||||
|
} |
||||||
@ -0,0 +1,27 @@ |
|||||||
|
// Copyright 2013 The Prometheus Authors
|
||||||
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||||||
|
// you may not use this file except in compliance with the License.
|
||||||
|
// You may obtain a copy of the License at
|
||||||
|
//
|
||||||
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||||||
|
//
|
||||||
|
// Unless required by applicable law or agreed to in writing, software
|
||||||
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||||||
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
|
// See the License for the specific language governing permissions and
|
||||||
|
// limitations under the License.
|
||||||
|
|
||||||
|
package notifier |
||||||
|
|
||||||
|
import ( |
||||||
|
"testing" |
||||||
|
|
||||||
|
"github.com/prometheus/alertmanager/api/v2/models" |
||||||
|
"github.com/stretchr/testify/require" |
||||||
|
|
||||||
|
"github.com/prometheus/prometheus/model/labels" |
||||||
|
) |
||||||
|
|
||||||
|
func TestLabelsToOpenAPILabelSet(t *testing.T) { |
||||||
|
require.Equal(t, models.LabelSet{"aaa": "111", "bbb": "222"}, labelsToOpenAPILabelSet(labels.FromStrings("aaa", "111", "bbb", "222"))) |
||||||
|
} |
||||||
Loading…
Reference in new issue