mirror of
https://github.com/prometheus/prometheus.git
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af1a19fc78
Signed-off-by: Matthieu MOREL <matthieu.morel35@gmail.com>
172 lines
5 KiB
Go
172 lines
5 KiB
Go
// Copyright 2021 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 ovhcloud
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import (
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"context"
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"errors"
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"fmt"
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"log/slog"
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"net/netip"
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"time"
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"github.com/ovh/go-ovh/ovh"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/common/config"
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"github.com/prometheus/common/model"
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"github.com/prometheus/prometheus/discovery"
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"github.com/prometheus/prometheus/discovery/refresh"
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"github.com/prometheus/prometheus/discovery/targetgroup"
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)
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// metaLabelPrefix is the meta prefix used for all meta labels in this discovery.
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const metaLabelPrefix = model.MetaLabelPrefix + "ovhcloud_"
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type refresher interface {
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refresh(context.Context) ([]*targetgroup.Group, error)
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}
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var DefaultSDConfig = SDConfig{
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Endpoint: "ovh-eu",
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RefreshInterval: model.Duration(60 * time.Second),
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}
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// SDConfig defines the Service Discovery struct used for configuration.
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type SDConfig struct {
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Endpoint string `yaml:"endpoint"`
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ApplicationKey string `yaml:"application_key"`
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ApplicationSecret config.Secret `yaml:"application_secret"`
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ConsumerKey config.Secret `yaml:"consumer_key"`
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RefreshInterval model.Duration `yaml:"refresh_interval"`
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Service string `yaml:"service"`
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}
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// NewDiscovererMetrics implements discovery.Config.
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func (*SDConfig) NewDiscovererMetrics(reg prometheus.Registerer, rmi discovery.RefreshMetricsInstantiator) discovery.DiscovererMetrics {
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return &ovhcloudMetrics{
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refreshMetrics: rmi,
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}
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}
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// Name implements the Discoverer interface.
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func (c SDConfig) Name() string {
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return "ovhcloud"
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}
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// UnmarshalYAML implements the yaml.Unmarshaler interface.
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func (c *SDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
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*c = DefaultSDConfig
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type plain SDConfig
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err := unmarshal((*plain)(c))
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if err != nil {
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return err
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}
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if c.Endpoint == "" {
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return errors.New("endpoint can not be empty")
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}
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if c.ApplicationKey == "" {
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return errors.New("application key can not be empty")
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}
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if c.ApplicationSecret == "" {
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return errors.New("application secret can not be empty")
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}
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if c.ConsumerKey == "" {
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return errors.New("consumer key can not be empty")
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}
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switch c.Service {
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case "dedicated_server", "vps":
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return nil
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default:
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return fmt.Errorf("unknown service: %v", c.Service)
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}
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}
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// CreateClient creates a new ovh client configured with given credentials.
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func createClient(config *SDConfig) (*ovh.Client, error) {
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return ovh.NewClient(config.Endpoint, config.ApplicationKey, string(config.ApplicationSecret), string(config.ConsumerKey))
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}
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// NewDiscoverer returns a Discoverer for the Config.
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func (c *SDConfig) NewDiscoverer(options discovery.DiscovererOptions) (discovery.Discoverer, error) {
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return NewDiscovery(c, options.Logger, options.Metrics)
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}
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func init() {
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discovery.RegisterConfig(&SDConfig{})
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}
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// ParseIPList parses ip list as they can have different formats.
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func parseIPList(ipList []string) ([]netip.Addr, error) {
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var ipAddresses []netip.Addr
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for _, ip := range ipList {
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ipAddr, err := netip.ParseAddr(ip)
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if err != nil {
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ipPrefix, err := netip.ParsePrefix(ip)
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if err != nil {
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return nil, errors.New("could not parse IP addresses from list")
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}
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if ipPrefix.IsValid() {
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netmask := ipPrefix.Bits()
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if netmask != 32 {
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continue
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}
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ipAddr = ipPrefix.Addr()
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}
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}
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if ipAddr.IsValid() && !ipAddr.IsUnspecified() {
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ipAddresses = append(ipAddresses, ipAddr)
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}
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}
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if len(ipAddresses) == 0 {
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return nil, errors.New("could not parse IP addresses from list")
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}
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return ipAddresses, nil
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}
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func newRefresher(conf *SDConfig, logger *slog.Logger) (refresher, error) {
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switch conf.Service {
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case "vps":
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return newVpsDiscovery(conf, logger), nil
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case "dedicated_server":
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return newDedicatedServerDiscovery(conf, logger), nil
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}
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return nil, fmt.Errorf("unknown OVHcloud discovery service '%s'", conf.Service)
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}
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// NewDiscovery returns a new OVHcloud Discoverer which periodically refreshes its targets.
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func NewDiscovery(conf *SDConfig, logger *slog.Logger, metrics discovery.DiscovererMetrics) (*refresh.Discovery, error) {
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m, ok := metrics.(*ovhcloudMetrics)
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if !ok {
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return nil, errors.New("invalid discovery metrics type")
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}
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r, err := newRefresher(conf, logger)
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if err != nil {
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return nil, err
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}
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return refresh.NewDiscovery(
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refresh.Options{
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Logger: logger,
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Mech: "ovhcloud",
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Interval: time.Duration(conf.RefreshInterval),
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RefreshF: r.refresh,
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MetricsInstantiator: m.refreshMetrics,
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},
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), nil
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}
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