prometheus/discovery/ionos/ionos.go
Felix Ehrenpfort ce3bc818a8
Add service discovery for IONOS Cloud (#10514)
* Add service discovery for IONOS Cloud

Signed-off-by: Felix Ehrenpfort <felix@ehrenpfort.de>
2022-05-20 14:57:23 +02:00

112 lines
3.1 KiB
Go

// Copyright 2022 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 ionos
import (
"time"
"github.com/go-kit/log"
"github.com/pkg/errors"
"github.com/prometheus/common/config"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/discovery"
"github.com/prometheus/prometheus/discovery/refresh"
)
const (
// metaLabelPrefix is the meta prefix used for all meta labels in this
// discovery.
metaLabelPrefix = model.MetaLabelPrefix + "ionos_"
metaLabelSeparator = ","
)
func init() {
discovery.RegisterConfig(&SDConfig{})
}
// Discovery periodically performs IONOS Cloud target discovery. It implements
// the Discoverer interface.
type Discovery struct{}
// NewDiscovery returns a new refresh.Discovery for IONOS Cloud.
func NewDiscovery(conf *SDConfig, logger log.Logger) (*refresh.Discovery, error) {
if conf.ionosEndpoint == "" {
conf.ionosEndpoint = "https://api.ionos.com"
}
d, err := newServerDiscovery(conf, logger)
if err != nil {
return nil, err
}
return refresh.NewDiscovery(
logger,
"ionos",
time.Duration(conf.RefreshInterval),
d.refresh,
), nil
}
// DefaultSDConfig is the default IONOS Cloud service discovery configuration.
var DefaultSDConfig = SDConfig{
HTTPClientConfig: config.DefaultHTTPClientConfig,
RefreshInterval: model.Duration(60 * time.Second),
Port: 80,
}
// SDConfig configuration to use for IONOS Cloud Discovery.
type SDConfig struct {
// DatacenterID: IONOS Cloud data center ID used to discover targets.
DatacenterID string `yaml:"datacenter_id"`
HTTPClientConfig config.HTTPClientConfig `yaml:",inline"`
RefreshInterval model.Duration `yaml:"refresh_interval"`
Port int `yaml:"port"`
ionosEndpoint string // For tests only.
}
// Name returns the name of the IONOS Cloud service discovery.
func (c SDConfig) Name() string {
return "ionos"
}
// NewDiscoverer returns a new discovery.Discoverer for IONOS Cloud.
func (c SDConfig) NewDiscoverer(options discovery.DiscovererOptions) (discovery.Discoverer, error) {
return NewDiscovery(&c, options.Logger)
}
// UnmarshalYAML implements the yaml.Unmarshaler interface.
func (c *SDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
*c = DefaultSDConfig
type plain SDConfig
err := unmarshal((*plain)(c))
if err != nil {
return err
}
if c.DatacenterID == "" {
return errors.New("datacenter id can't be empty")
}
return c.HTTPClientConfig.Validate()
}
// SetDirectory joins any relative file paths with dir.
func (c *SDConfig) SetDirectory(dir string) {
c.HTTPClientConfig.SetDirectory(dir)
}