prometheus/discovery/targetgroup/targetgroup.go

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Refactor SD configuration to remove `config` dependency (#3629) * refactor: move targetGroup struct and CheckOverflow() to their own package * refactor: move auth and security related structs to a utility package, fix import error in utility package * refactor: Azure SD, remove SD struct from config * refactor: DNS SD, remove SD struct from config into dns package * refactor: ec2 SD, move SD struct from config into the ec2 package * refactor: file SD, move SD struct from config to file discovery package * refactor: gce, move SD struct from config to gce discovery package * refactor: move HTTPClientConfig and URL into util/config, fix import error in httputil * refactor: consul, move SD struct from config into consul discovery package * refactor: marathon, move SD struct from config into marathon discovery package * refactor: triton, move SD struct from config to triton discovery package, fix test * refactor: zookeeper, move SD structs from config to zookeeper discovery package * refactor: openstack, remove SD struct from config, move into openstack discovery package * refactor: kubernetes, move SD struct from config into kubernetes discovery package * refactor: notifier, use targetgroup package instead of config * refactor: tests for file, marathon, triton SD - use targetgroup package instead of config.TargetGroup * refactor: retrieval, use targetgroup package instead of config.TargetGroup * refactor: storage, use config util package * refactor: discovery manager, use targetgroup package instead of config.TargetGroup * refactor: use HTTPClient and TLS config from configUtil instead of config * refactor: tests, use targetgroup package instead of config.TargetGroup * refactor: fix tagetgroup.Group pointers that were removed by mistake * refactor: openstack, kubernetes: drop prefixes * refactor: remove import aliases forced due to vscode bug * refactor: move main SD struct out of config into discovery/config * refactor: rename configUtil to config_util * refactor: rename yamlUtil to yaml_config * refactor: kubernetes, remove prefixes * refactor: move the TargetGroup package to discovery/ * refactor: fix order of imports
2017-12-29 12:01:34 -08:00
// 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 targetgroup
import (
"encoding/json"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/util/yaml"
)
// Group is a set of targets with a common label set(production , test, staging etc.).
type Group struct {
// Targets is a list of targets identified by a label set. Each target is
// uniquely identifiable in the group by its address label.
Targets []model.LabelSet
// Labels is a set of labels that is common across all targets in the group.
Labels model.LabelSet
// Source is an identifier that describes a group of targets.
Source string
}
func (tg Group) String() string {
return tg.Source
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (tg *Group) UnmarshalYAML(unmarshal func(interface{}) error) error {
g := struct {
Targets []string `yaml:"targets"`
Labels model.LabelSet `yaml:"labels"`
XXX map[string]interface{} `yaml:",inline"`
}{}
if err := unmarshal(&g); err != nil {
return err
}
tg.Targets = make([]model.LabelSet, 0, len(g.Targets))
for _, t := range g.Targets {
tg.Targets = append(tg.Targets, model.LabelSet{
model.AddressLabel: model.LabelValue(t),
})
}
tg.Labels = g.Labels
return yaml.CheckOverflow(g.XXX, "static_config")
}
// MarshalYAML implements the yaml.Marshaler interface.
func (tg Group) MarshalYAML() (interface{}, error) {
g := &struct {
Targets []string `yaml:"targets"`
Labels model.LabelSet `yaml:"labels,omitempty"`
}{
Targets: make([]string, 0, len(tg.Targets)),
Labels: tg.Labels,
}
for _, t := range tg.Targets {
g.Targets = append(g.Targets, string(t[model.AddressLabel]))
}
return g, nil
}
// UnmarshalJSON implements the json.Unmarshaler interface.
func (tg *Group) UnmarshalJSON(b []byte) error {
g := struct {
Targets []string `json:"targets"`
Labels model.LabelSet `json:"labels"`
}{}
if err := json.Unmarshal(b, &g); err != nil {
return err
}
tg.Targets = make([]model.LabelSet, 0, len(g.Targets))
for _, t := range g.Targets {
tg.Targets = append(tg.Targets, model.LabelSet{
model.AddressLabel: model.LabelValue(t),
})
}
tg.Labels = g.Labels
return nil
}