The Prometheus monitoring system and time series database.
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// Copyright 2021 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 ovhcloud
import (
"context"
"errors"
"fmt"
"net/netip"
"time"
"github.com/go-kit/log"
"github.com/ovh/go-ovh/ovh"
"github.com/prometheus/common/config"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/discovery"
"github.com/prometheus/prometheus/discovery/refresh"
"github.com/prometheus/prometheus/discovery/targetgroup"
)
// metaLabelPrefix is the meta prefix used for all meta labels in this discovery.
const metaLabelPrefix = model.MetaLabelPrefix + "ovhcloud_"
type refresher interface {
refresh(context.Context) ([]*targetgroup.Group, error)
}
var DefaultSDConfig = SDConfig{
Endpoint: "ovh-eu",
RefreshInterval: model.Duration(60 * time.Second),
}
// SDConfig defines the Service Discovery struct used for configuration.
type SDConfig struct {
Endpoint string `yaml:"endpoint"`
ApplicationKey string `yaml:"application_key"`
ApplicationSecret config.Secret `yaml:"application_secret"`
ConsumerKey config.Secret `yaml:"consumer_key"`
RefreshInterval model.Duration `yaml:"refresh_interval"`
Service string `yaml:"service"`
}
// Name implements the Discoverer interface.
func (c SDConfig) Name() string {
return "ovhcloud"
}
// 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.Endpoint == "" {
return errors.New("endpoint can not be empty")
}
if c.ApplicationKey == "" {
return errors.New("application key can not be empty")
}
if c.ApplicationSecret == "" {
return errors.New("application secret can not be empty")
}
if c.ConsumerKey == "" {
return errors.New("consumer key can not be empty")
}
switch c.Service {
case "dedicated_server", "vps":
return nil
default:
return fmt.Errorf("unknown service: %v", c.Service)
}
}
// CreateClient creates a new ovh client configured with given credentials.
func createClient(config *SDConfig) (*ovh.Client, error) {
return ovh.NewClient(config.Endpoint, config.ApplicationKey, string(config.ApplicationSecret), string(config.ConsumerKey))
}
// NewDiscoverer returns a Discoverer for the Config.
func (c *SDConfig) NewDiscoverer(options discovery.DiscovererOptions) (discovery.Discoverer, error) {
return NewDiscovery(c, options.Logger)
}
func init() {
discovery.RegisterConfig(&SDConfig{})
}
// ParseIPList parses ip list as they can have different formats.
func parseIPList(ipList []string) ([]netip.Addr, error) {
var ipAddresses []netip.Addr
for _, ip := range ipList {
ipAddr, err := netip.ParseAddr(ip)
if err != nil {
ipPrefix, err := netip.ParsePrefix(ip)
if err != nil {
return nil, errors.New("could not parse IP addresses from list")
}
if ipPrefix.IsValid() {
netmask := ipPrefix.Bits()
if netmask != 32 {
continue
}
ipAddr = ipPrefix.Addr()
}
}
if ipAddr.IsValid() && !ipAddr.IsUnspecified() {
ipAddresses = append(ipAddresses, ipAddr)
}
}
if len(ipAddresses) == 0 {
return nil, errors.New("could not parse IP addresses from list")
}
return ipAddresses, nil
}
func newRefresher(conf *SDConfig, logger log.Logger) (refresher, error) {
switch conf.Service {
case "vps":
return newVpsDiscovery(conf, logger), nil
case "dedicated_server":
return newDedicatedServerDiscovery(conf, logger), nil
}
return nil, fmt.Errorf("unknown OVHcloud discovery service '%s'", conf.Service)
}
// NewDiscovery returns a new OVHcloud Discoverer which periodically refreshes its targets.
func NewDiscovery(conf *SDConfig, logger log.Logger) (*refresh.Discovery, error) {
r, err := newRefresher(conf, logger)
if err != nil {
return nil, err
}
return refresh.NewDiscovery(
logger,
"ovhcloud",
time.Duration(conf.RefreshInterval),
r.refresh,
), nil
}