164 lines
4.6 KiB
Go
164 lines
4.6 KiB
Go
// Package scaleway implements a DNS provider for solving the DNS-01 challenge using Scaleway Domains API.
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// Token: https://www.scaleway.com/en/docs/generate-an-api-token/
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package scaleway
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import (
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"errors"
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"fmt"
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"time"
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"github.com/go-acme/lego/v4/challenge/dns01"
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"github.com/go-acme/lego/v4/platform/config/env"
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scwdomain "github.com/scaleway/scaleway-sdk-go/api/domain/v2beta1"
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"github.com/scaleway/scaleway-sdk-go/scw"
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)
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const (
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minTTL = 60
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defaultPollingInterval = 10 * time.Second
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defaultPropagationTimeout = 120 * time.Second
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)
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// Environment variables names.
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const (
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envNamespace = "SCALEWAY_"
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EnvAPIToken = envNamespace + "API_TOKEN"
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EnvProjectID = envNamespace + "PROJECT_ID"
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EnvTTL = envNamespace + "TTL"
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EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
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EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
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)
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// Config is used to configure the creation of the DNSProvider.
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type Config struct {
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ProjectID string
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Token string
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PropagationTimeout time.Duration
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PollingInterval time.Duration
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TTL int
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}
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// NewDefaultConfig returns a default configuration for the DNSProvider.
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func NewDefaultConfig() *Config {
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return &Config{
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TTL: env.GetOrDefaultInt(EnvTTL, minTTL),
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PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, defaultPropagationTimeout),
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PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, defaultPollingInterval),
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}
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}
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// DNSProvider implements the challenge.Provider interface.
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type DNSProvider struct {
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config *Config
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client *scwdomain.API
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}
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// NewDNSProvider returns a DNSProvider instance configured for Scaleway Domains API.
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// Credentials must be passed in the environment variables:
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// SCALEWAY_API_TOKEN, SCALEWAY_PROJECT_ID.
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func NewDNSProvider() (*DNSProvider, error) {
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values, err := env.Get(EnvAPIToken)
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if err != nil {
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return nil, fmt.Errorf("scaleway: %w", err)
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}
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config := NewDefaultConfig()
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config.Token = values[EnvAPIToken]
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config.ProjectID = env.GetOrFile(EnvProjectID)
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return NewDNSProviderConfig(config)
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}
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// NewDNSProviderConfig return a DNSProvider instance configured for scaleway.
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func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
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if config == nil {
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return nil, errors.New("scaleway: the configuration of the DNS provider is nil")
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}
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if config.Token == "" {
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return nil, errors.New("scaleway: credentials missing")
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}
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if config.TTL < minTTL {
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config.TTL = minTTL
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}
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configuration := []scw.ClientOption{
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scw.WithAuth("SCWXXXXXXXXXXXXXXXXX", config.Token),
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scw.WithUserAgent("Scaleway Lego's provider"),
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}
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if config.ProjectID != "" {
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configuration = append(configuration, scw.WithDefaultProjectID(config.ProjectID))
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}
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// Create a Scaleway client
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clientScw, err := scw.NewClient(configuration...)
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if err != nil {
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return nil, fmt.Errorf("scaleway: %w", err)
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}
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return &DNSProvider{config: config, client: scwdomain.NewAPI(clientScw)}, nil
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}
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// Timeout returns the Timeout and interval to use when checking for DNS propagation.
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// Adjusting here to cope with spikes in propagation times.
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func (d *DNSProvider) Timeout() (timeout, interval time.Duration) {
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return d.config.PropagationTimeout, d.config.PollingInterval
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}
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// Present creates a TXT record to fulfill DNS-01 challenge.
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func (d *DNSProvider) Present(domain, token, keyAuth string) error {
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fqdn, value := dns01.GetRecord(domain, keyAuth)
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records := []*scwdomain.Record{{
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Data: fmt.Sprintf(`%q`, value),
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Name: fqdn,
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TTL: uint32(d.config.TTL),
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Type: scwdomain.RecordTypeTXT,
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Comment: scw.StringPtr("used by lego"),
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}}
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req := &scwdomain.UpdateDNSZoneRecordsRequest{
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DNSZone: domain,
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Changes: []*scwdomain.RecordChange{{
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Add: &scwdomain.RecordChangeAdd{Records: records},
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}},
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ReturnAllRecords: scw.BoolPtr(false),
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}
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_, err := d.client.UpdateDNSZoneRecords(req)
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if err != nil {
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return fmt.Errorf("scaleway: %w", err)
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}
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return nil
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}
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// CleanUp removes a TXT record used for DNS-01 challenge.
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func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
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fqdn, value := dns01.GetRecord(domain, keyAuth)
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recordIdentifier := &scwdomain.RecordIdentifier{
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Name: fqdn,
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Type: scwdomain.RecordTypeTXT,
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Data: scw.StringPtr(fmt.Sprintf(`%q`, value)),
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}
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req := &scwdomain.UpdateDNSZoneRecordsRequest{
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DNSZone: domain,
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Changes: []*scwdomain.RecordChange{{
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Delete: &scwdomain.RecordChangeDelete{IDFields: recordIdentifier},
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}},
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ReturnAllRecords: scw.BoolPtr(false),
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}
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_, err := d.client.UpdateDNSZoneRecords(req)
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if err != nil {
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return fmt.Errorf("scaleway: %w", err)
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}
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return nil
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}
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