Add DNS provider for VK Cloud (#1706)

Co-authored-by: Fernandez Ludovic <ldez@users.noreply.github.com>

.golangci.toml

@@ -1,5 +1,5 @@
 [run]
-  timeout = "5m"
+  timeout = "7m"
   skip-files = []
 
 [linters-settings]

README.md

@@ -73,9 +73,9 @@ Detailed documentation is available [here](https://go-acme.github.io/lego/dns).
 | [Sakura Cloud](https://go-acme.github.io/lego/dns/sakuracloud/)                 | [Scaleway](https://go-acme.github.io/lego/dns/scaleway/)                        | [Selectel](https://go-acme.github.io/lego/dns/selectel/)                        | [Servercow](https://go-acme.github.io/lego/dns/servercow/)                      |
 | [Simply.com](https://go-acme.github.io/lego/dns/simply/)                        | [Sonic](https://go-acme.github.io/lego/dns/sonic/)                              | [Stackpath](https://go-acme.github.io/lego/dns/stackpath/)                      | [Tencent Cloud DNS](https://go-acme.github.io/lego/dns/tencentcloud/)           |
 | [TransIP](https://go-acme.github.io/lego/dns/transip/)                          | [UKFast SafeDNS](https://go-acme.github.io/lego/dns/safedns/)                   | [Variomedia](https://go-acme.github.io/lego/dns/variomedia/)                    | [VegaDNS](https://go-acme.github.io/lego/dns/vegadns/)                          |
-| [Vercel](https://go-acme.github.io/lego/dns/vercel/)                            | [Versio.[nl/eu/uk]](https://go-acme.github.io/lego/dns/versio/)                 | [VinylDNS](https://go-acme.github.io/lego/dns/vinyldns/)                        | [Vscale](https://go-acme.github.io/lego/dns/vscale/)                            |
-| [Vultr](https://go-acme.github.io/lego/dns/vultr/)                              | [WEDOS](https://go-acme.github.io/lego/dns/wedos/)                              | [Yandex Cloud](https://go-acme.github.io/lego/dns/yandexcloud/)                 | [Yandex](https://go-acme.github.io/lego/dns/yandex/)                            |
-| [Zone.ee](https://go-acme.github.io/lego/dns/zoneee/)                           | [Zonomi](https://go-acme.github.io/lego/dns/zonomi/)                            |                                                                                 |                                                                                 |
+| [Vercel](https://go-acme.github.io/lego/dns/vercel/)                            | [Versio.[nl/eu/uk]](https://go-acme.github.io/lego/dns/versio/)                 | [VinylDNS](https://go-acme.github.io/lego/dns/vinyldns/)                        | [VK Cloud](https://go-acme.github.io/lego/dns/vkcloud/)                         |
+| [Vscale](https://go-acme.github.io/lego/dns/vscale/)                            | [Vultr](https://go-acme.github.io/lego/dns/vultr/)                              | [WEDOS](https://go-acme.github.io/lego/dns/wedos/)                              | [Yandex Cloud](https://go-acme.github.io/lego/dns/yandexcloud/)                 |
+| [Yandex](https://go-acme.github.io/lego/dns/yandex/)                            | [Zone.ee](https://go-acme.github.io/lego/dns/zoneee/)                           | [Zonomi](https://go-acme.github.io/lego/dns/zonomi/)                            |                                                                                 |
 
 <!-- END DNS PROVIDERS LIST -->
 

cmd/account.go

@@ -29,5 +29,3 @@ func (a *Account) GetPrivateKey() crypto.PrivateKey {
 func (a *Account) GetRegistration() *registration.Resource {
 	return a.Registration
 }
-
-/** End **/

cmd/zz_gen_cmd_dnshelp.go

@@ -112,6 +112,7 @@ func allDNSCodes() string {
 		"vercel",
 		"versio",
 		"vinyldns",
+		"vkcloud",
 		"vscale",
 		"vultr",
 		"wedos",
@@ -2222,6 +2223,30 @@ func displayDNSHelp(name string) error {
 		ew.writeln()
 		ew.writeln(`More information: https://go-acme.github.io/lego/dns/vinyldns`)
 
+	case "vkcloud":
+		// generated from: providers/dns/vkcloud/vkcloud.toml
+		ew.writeln(`Configuration for VK Cloud.`)
+		ew.writeln(`Code:	'vkcloud'`)
+		ew.writeln(`Since:	'v4.9.0'`)
+		ew.writeln()
+
+		ew.writeln(`Credentials:`)
+		ew.writeln(`	- "VK_CLOUD_PASSWORD":	Password for VK Cloud account`)
+		ew.writeln(`	- "VK_CLOUD_PROJECT_ID":	String ID of project in VK Cloud`)
+		ew.writeln(`	- "VK_CLOUD_USERNAME":	Email of VK Cloud account`)
+		ew.writeln()
+
+		ew.writeln(`Additional Configuration:`)
+		ew.writeln(`	- "VK_CLOUD_DNS_ENDPOINT":	URL of DNS API. Defaults to https://mcs.mail.ru/public-dns but can be changed for usage with private clouds`)
+		ew.writeln(`	- "VK_CLOUD_DOMAIN_NAME":	Openstack users domain name. Defaults to 'users' but can be changed for usage with private clouds`)
+		ew.writeln(`	- "VK_CLOUD_IDENTITY_ENDPOINT":	URL of OpenStack Auth API, Defaults to https://infra.mail.ru:35357/v3/ but can be changed for usage with private clouds`)
+		ew.writeln(`	- "VK_CLOUD_POLLING_INTERVAL":	Time between DNS propagation check`)
+		ew.writeln(`	- "VK_CLOUD_PROPAGATION_TIMEOUT":	Maximum waiting time for DNS propagation`)
+		ew.writeln(`	- "VK_CLOUD_TTL":	The TTL of the TXT record used for the DNS challenge`)
+
+		ew.writeln()
+		ew.writeln(`More information: https://go-acme.github.io/lego/dns/vkcloud`)
+
 	case "vscale":
 		// generated from: providers/dns/vscale/vscale.toml
 		ew.writeln(`Configuration for Vscale.`)

docs/content/dns/zz_gen_vkcloud.md

@@ -0,0 +1,83 @@
+---
+title: "VK Cloud"
+date: 2019-03-03T16:39:46+01:00
+draft: false
+slug: vkcloud
+dnsprovider:
+  since:    "v4.9.0"
+  code:     "vkcloud"
+  url:      "https://mcs.mail.ru/"
+---
+
+<!-- THIS DOCUMENTATION IS AUTO-GENERATED. PLEASE DO NOT EDIT. -->
+<!-- providers/dns/vkcloud/vkcloud.toml -->
+<!-- THIS DOCUMENTATION IS AUTO-GENERATED. PLEASE DO NOT EDIT. -->
+
+
+Configuration for [VK Cloud](https://mcs.mail.ru/).
+
+
+<!--more-->
+
+- Code: `vkcloud`
+- Since: v4.9.0
+
+
+Here is an example bash command using the VK Cloud provider:
+
+```bash
+VK_CLOUD_PROJECT_ID="<your_project_id>" \
+VK_CLOUD_USERNAME="<your_email>" \
+VK_CLOUD_PASSWORD="<your_password>" \
+lego --email you@example.com --dns vkcloud --domains "example.org" --domains "*.example.org" run
+```
+
+
+
+
+## Credentials
+
+| Environment Variable Name | Description |
+|-----------------------|-------------|
+| `VK_CLOUD_PASSWORD` | Password for VK Cloud account |
+| `VK_CLOUD_PROJECT_ID` | String ID of project in VK Cloud |
+| `VK_CLOUD_USERNAME` | Email of VK Cloud account |
+
+The environment variable names can be suffixed by `_FILE` to reference a file instead of a value.
+More information [here]({{< ref "dns#configuration-and-credentials" >}}).
+
+
+## Additional Configuration
+
+| Environment Variable Name | Description |
+|--------------------------------|-------------|
+| `VK_CLOUD_DNS_ENDPOINT` | URL of DNS API. Defaults to https://mcs.mail.ru/public-dns but can be changed for usage with private clouds |
+| `VK_CLOUD_DOMAIN_NAME` | Openstack users domain name. Defaults to `users` but can be changed for usage with private clouds |
+| `VK_CLOUD_IDENTITY_ENDPOINT` | URL of OpenStack Auth API, Defaults to https://infra.mail.ru:35357/v3/ but can be changed for usage with private clouds |
+| `VK_CLOUD_POLLING_INTERVAL` | Time between DNS propagation check |
+| `VK_CLOUD_PROPAGATION_TIMEOUT` | Maximum waiting time for DNS propagation |
+| `VK_CLOUD_TTL` | The TTL of the TXT record used for the DNS challenge |
+
+The environment variable names can be suffixed by `_FILE` to reference a file instead of a value.
+More information [here]({{< ref "dns#configuration-and-credentials" >}}).
+
+## Credential inforamtion
+
+You can find all required and additional information on ["Project/Keys" page](https://mcs.mail.ru/app/en/project/keys) of your cloud.
+
+| ENV Variable               | Parameter from page |
+|----------------------------|---------------------|
+| VK_CLOUD_PROJECT_ID        | Project ID          |
+| VK_CLOUD_USERNAME          | Username            |
+| VK_CLOUD_DOMAIN_NAME       | User Domain Name    |
+| VK_CLOUD_IDENTITY_ENDPOINT | Identity endpoint   |
+
+
+
+## More information
+
+- [API documentation](https://mcs.mail.ru/docs/networks/vnet/networks/publicdns/api)
+
+<!-- THIS DOCUMENTATION IS AUTO-GENERATED. PLEASE DO NOT EDIT. -->
+<!-- providers/dns/vkcloud/vkcloud.toml -->
+<!-- THIS DOCUMENTATION IS AUTO-GENERATED. PLEASE DO NOT EDIT. -->

providers/dns/dns_providers.go

@@ -103,6 +103,7 @@ import (
 	"github.com/go-acme/lego/v4/providers/dns/vercel"
 	"github.com/go-acme/lego/v4/providers/dns/versio"
 	"github.com/go-acme/lego/v4/providers/dns/vinyldns"
+	"github.com/go-acme/lego/v4/providers/dns/vkcloud"
 	"github.com/go-acme/lego/v4/providers/dns/vscale"
 	"github.com/go-acme/lego/v4/providers/dns/vultr"
 	"github.com/go-acme/lego/v4/providers/dns/wedos"
@@ -313,6 +314,8 @@ func NewDNSChallengeProviderByName(name string) (challenge.Provider, error) {
 		return versio.NewDNSProvider()
 	case "vinyldns":
 		return vinyldns.NewDNSProvider()
+	case "vkcloud":
+		return vkcloud.NewDNSProvider()
 	case "vultr":
 		return vultr.NewDNSProvider()
 	case "vscale":

providers/dns/vkcloud/internal/client.go

@@ -0,0 +1,160 @@
+package internal
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"net/url"
+	"path"
+	"strings"
+
+	"github.com/gophercloud/gophercloud"
+	"github.com/gophercloud/gophercloud/openstack"
+)
+
+// Client VK client.
+type Client struct {
+	baseURL       *url.URL
+	openstack     *gophercloud.ProviderClient
+	authOpts      gophercloud.AuthOptions
+	authenticated bool
+}
+
+// NewClient creates a Client.
+func NewClient(endpoint string, authOpts gophercloud.AuthOptions) (*Client, error) {
+	err := validateAuthOptions(authOpts)
+	if err != nil {
+		return nil, err
+	}
+
+	openstackClient, err := openstack.NewClient(authOpts.IdentityEndpoint)
+	if err != nil {
+		return nil, fmt.Errorf("new client: %w", err)
+	}
+
+	baseURL, err := url.Parse(endpoint)
+	if err != nil {
+		return nil, fmt.Errorf("parse URL: %w", err)
+	}
+
+	return &Client{
+		baseURL:   baseURL,
+		openstack: openstackClient,
+		authOpts:  authOpts,
+	}, nil
+}
+
+func (c *Client) ListZones() ([]DNSZone, error) {
+	var zones []DNSZone
+	opts := &gophercloud.RequestOpts{JSONResponse: &zones}
+
+	// TODO(ldez): go1.19 => c.baseURL.JoinPath("/")
+	endpoint := joinPath(c.baseURL, "/")
+
+	err := c.request(http.MethodGet, endpoint, opts)
+	if err != nil {
+		return nil, err
+	}
+
+	return zones, nil
+}
+
+func (c *Client) ListTXTRecords(zoneUUID string) ([]DNSTXTRecord, error) {
+	var records []DNSTXTRecord
+	opts := &gophercloud.RequestOpts{JSONResponse: &records}
+
+	// TODO(ldez): go1.19 => c.baseURL.JoinPath(zoneUUID, "txt", "/")
+	endpoint := joinPath(c.baseURL, zoneUUID, "txt", "/")
+
+	err := c.request(http.MethodGet, endpoint, opts)
+	if err != nil {
+		return nil, err
+	}
+
+	return records, nil
+}
+
+func (c *Client) CreateTXTRecord(zoneUUID string, record *DNSTXTRecord) error {
+	opts := &gophercloud.RequestOpts{
+		JSONBody:     record,
+		JSONResponse: record,
+	}
+
+	// TODO(ldez): go1.19 => c.baseURL.JoinPath(zoneUUID, "txt", "/")
+	endpoint := joinPath(c.baseURL, zoneUUID, "txt", "/")
+
+	return c.request(http.MethodPost, endpoint, opts)
+}
+
+func (c *Client) DeleteTXTRecord(zoneUUID, recordUUID string) error {
+	// TODO(ldez): go1.19 => c.baseURL.JoinPath(zoneUUID, "txt", recordUUID)
+	endpoint := joinPath(c.baseURL, zoneUUID, "txt", recordUUID)
+
+	return c.request(http.MethodDelete, endpoint, &gophercloud.RequestOpts{})
+}
+
+func (c *Client) request(method string, endpoint *url.URL, options *gophercloud.RequestOpts) error {
+	if err := c.lazyAuth(); err != nil {
+		return fmt.Errorf("auth: %w", err)
+	}
+
+	_, err := c.openstack.Request(method, endpoint.String(), options)
+	if err != nil {
+		return fmt.Errorf("request: %w", err)
+	}
+
+	return nil
+}
+
+func (c *Client) lazyAuth() error {
+	if c.authenticated {
+		return nil
+	}
+
+	err := openstack.Authenticate(c.openstack, c.authOpts)
+	if err != nil {
+		return err
+	}
+
+	c.authenticated = true
+
+	return nil
+}
+
+func validateAuthOptions(opts gophercloud.AuthOptions) error {
+	if opts.TenantID == "" {
+		return errors.New("project id is missing in credentials information")
+	}
+
+	if opts.Username == "" {
+		return errors.New("username is missing in credentials information")
+	}
+
+	if opts.Password == "" {
+		return errors.New("password is missing in credentials information")
+	}
+
+	if opts.IdentityEndpoint == "" {
+		return errors.New("identity endpoint is missing in config")
+	}
+
+	if opts.DomainName == "" {
+		return errors.New("domain name is missing in config")
+	}
+
+	return nil
+}
+
+// light version of go1.19 url.URL.JoinPath.
+// TODO(ldez): must be remove when we will update to go1.19.
+func joinPath(uri *url.URL, elem ...string) *url.URL {
+	result := path.Join(elem...)
+	result = path.Join(uri.Path, result)
+	if len(elem) > 0 && strings.HasSuffix(elem[len(elem)-1], "/") {
+		result += "/"
+	}
+
+	parse, _ := uri.Parse(result)
+
+	return parse
+}

providers/dns/vkcloud/internal/types.go

@@ -0,0 +1,23 @@
+package internal
+
+type DNSZone struct {
+	UUID          string `json:"uuid,omitempty"`
+	Tenant        string `json:"tenant,omitempty"`
+	SoaPrimaryDNS string `json:"soa_primary_dns,omitempty"`
+	SoaAdminEmail string `json:"soa_admin_email,omitempty"`
+	SoaSerial     int    `json:"soa_serial,omitempty"`
+	SoaRefresh    int    `json:"soa_refresh,omitempty"`
+	SoaRetry      int    `json:"soa_retry,omitempty"`
+	SoaExpire     int    `json:"soa_expire,omitempty"`
+	SoaTTL        int    `json:"soa_ttl,omitempty"`
+	Zone          string `json:"zone,omitempty"`
+	Status        string `json:"status,omitempty"`
+}
+
+type DNSTXTRecord struct {
+	UUID    string `json:"uuid,omitempty"`
+	Name    string `json:"name,omitempty"`
+	DNS     string `json:"dns,omitempty"`
+	Content string `json:"content,omitempty"`
+	TTL     int    `json:"ttl,omitempty"`
+}

providers/dns/vkcloud/vkcloud.go

@@ -0,0 +1,236 @@
+// Package vkcloud implements a DNS provider for solving the DNS-01 challenge using VK Cloud.
+package vkcloud
+
+import (
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/go-acme/lego/v4/challenge/dns01"
+	"github.com/go-acme/lego/v4/platform/config/env"
+	"github.com/go-acme/lego/v4/providers/dns/vkcloud/internal"
+	"github.com/gophercloud/gophercloud"
+)
+
+const (
+	defaultIdentityEndpoint = "https://infra.mail.ru/identity/v3/"
+	defaultDNSEndpoint      = "https://mcs.mail.ru/public-dns/v2/dns"
+)
+
+const defaultTTL = 60
+
+const defaultDomainName = "users"
+
+// Environment variables names.
+const (
+	envNamespace = "VK_CLOUD_"
+
+	EnvDNSEndpoint = envNamespace + "DNS_ENDPOINT"
+
+	EnvIdentityEndpoint = envNamespace + "IDENTITY_ENDPOINT"
+	EnvDomainName       = envNamespace + "DOMAIN_NAME"
+
+	EnvProjectID = envNamespace + "PROJECT_ID"
+	EnvUsername  = envNamespace + "USERNAME"
+	EnvPassword  = envNamespace + "PASSWORD"
+
+	EnvTTL                = envNamespace + "TTL"
+	EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
+	EnvPollingInterval    = envNamespace + "POLLING_INTERVAL"
+)
+
+// Config is used to configure the creation of the DNSProvider.
+type Config struct {
+	ProjectID string
+	Username  string
+	Password  string
+
+	DNSEndpoint string
+
+	IdentityEndpoint string
+	DomainName       string
+
+	PropagationTimeout time.Duration
+	PollingInterval    time.Duration
+	TTL                int
+}
+
+// NewDefaultConfig returns a default configuration for the DNSProvider.
+func NewDefaultConfig() *Config {
+	return &Config{
+		TTL:                env.GetOrDefaultInt(EnvTTL, defaultTTL),
+		PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, dns01.DefaultPropagationTimeout),
+		PollingInterval:    env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
+	}
+}
+
+// DNSProvider implements the challenge.Provider interface.
+type DNSProvider struct {
+	client *internal.Client
+	config *Config
+}
+
+// NewDNSProvider returns a DNSProvider instance configured for VK Cloud.
+func NewDNSProvider() (*DNSProvider, error) {
+	values, err := env.Get(EnvProjectID, EnvUsername, EnvPassword)
+	if err != nil {
+		return nil, fmt.Errorf("vkcloud: %w", err)
+	}
+
+	config := NewDefaultConfig()
+	config.ProjectID = values[EnvProjectID]
+	config.Username = values[EnvUsername]
+	config.Password = values[EnvPassword]
+	config.IdentityEndpoint = env.GetOrDefaultString(EnvIdentityEndpoint, defaultIdentityEndpoint)
+	config.DomainName = env.GetOrDefaultString(EnvDomainName, defaultDomainName)
+	config.DNSEndpoint = env.GetOrDefaultString(EnvDNSEndpoint, defaultDNSEndpoint)
+
+	return NewDNSProviderConfig(config)
+}
+
+// NewDNSProviderConfig return a DNSProvider instance configured for VK Cloud.
+func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
+	if config == nil {
+		return nil, errors.New("vkcloud: the configuration of the DNS provider is nil")
+	}
+
+	if config.DNSEndpoint == "" {
+		return nil, fmt.Errorf("vkcloud: DNS endpoint is missing in config")
+	}
+
+	authOpts := gophercloud.AuthOptions{
+		IdentityEndpoint: config.IdentityEndpoint,
+		Username:         config.Username,
+		Password:         config.Password,
+		DomainName:       config.DomainName,
+		TenantID:         config.ProjectID,
+	}
+
+	client, err := internal.NewClient(config.DNSEndpoint, authOpts)
+	if err != nil {
+		return nil, fmt.Errorf("vkcloud: unable to build VK Cloud client: %w", err)
+	}
+
+	return &DNSProvider{
+		client: client,
+		config: config,
+	}, nil
+}
+
+// Present creates a TXT record to fulfill the dns-01 challenge.
+func (r *DNSProvider) Present(domain, _, keyAuth string) error {
+	fqdn, value := dns01.GetRecord(domain, keyAuth)
+
+	authZone, err := dns01.FindZoneByFqdn(fqdn)
+	if err != nil {
+		return fmt.Errorf("vkcloud: %w", err)
+	}
+
+	authZone = dns01.UnFqdn(authZone)
+
+	zones, err := r.client.ListZones()
+	if err != nil {
+		return fmt.Errorf("vkcloud: unable to fetch dns zones: %w", err)
+	}
+
+	var zoneUUID string
+	for _, zone := range zones {
+		if zone.Zone == authZone {
+			zoneUUID = zone.UUID
+		}
+	}
+
+	if zoneUUID == "" {
+		return fmt.Errorf("vkcloud: cant find dns zone %s in VK Cloud", authZone)
+	}
+
+	name := fqdn[:len(fqdn)-len(authZone)-1]
+
+	err = r.upsertTXTRecord(zoneUUID, name, value)
+	if err != nil {
+		return fmt.Errorf("vkcloud: %w", err)
+	}
+
+	return nil
+}
+
+// CleanUp removes the TXT record matching the specified parameters.
+func (r *DNSProvider) CleanUp(domain, _, keyAuth string) error {
+	fqdn, value := dns01.GetRecord(domain, keyAuth)
+
+	authZone, err := dns01.FindZoneByFqdn(fqdn)
+	if err != nil {
+		return fmt.Errorf("vkcloud: %w", err)
+	}
+
+	authZone = dns01.UnFqdn(authZone)
+
+	zones, err := r.client.ListZones()
+	if err != nil {
+		return fmt.Errorf("vkcloud: unable to fetch dns zones: %w", err)
+	}
+
+	var zoneUUID string
+
+	for _, zone := range zones {
+		if zone.Zone == authZone {
+			zoneUUID = zone.UUID
+		}
+	}
+
+	if zoneUUID == "" {
+		return nil
+	}
+
+	name := fqdn[:len(fqdn)-len(authZone)-1]
+
+	err = r.removeTXTRecord(zoneUUID, name, value)
+	if err != nil {
+		return fmt.Errorf("vkcloud: %w", err)
+	}
+
+	return nil
+}
+
+// Timeout returns the timeout and interval to use when checking for DNS propagation.
+// Adjusting here to cope with spikes in propagation times.
+func (r *DNSProvider) Timeout() (timeout, interval time.Duration) {
+	return r.config.PropagationTimeout, r.config.PollingInterval
+}
+
+func (r *DNSProvider) upsertTXTRecord(zoneUUID, name, value string) error {
+	records, err := r.client.ListTXTRecords(zoneUUID)
+	if err != nil {
+		return err
+	}
+
+	for _, record := range records {
+		if record.Name == name && record.Content == value {
+			// The DNSRecord is already present, nothing to do
+			return nil
+		}
+	}
+
+	return r.client.CreateTXTRecord(zoneUUID, &internal.DNSTXTRecord{
+		Name:    name,
+		Content: value,
+		TTL:     r.config.TTL,
+	})
+}
+
+func (r *DNSProvider) removeTXTRecord(zoneUUID, name, value string) error {
+	records, err := r.client.ListTXTRecords(zoneUUID)
+	if err != nil {
+		return err
+	}
+
+	name = dns01.UnFqdn(name)
+	for _, record := range records {
+		if record.Name == name && record.Content == value {
+			return r.client.DeleteTXTRecord(zoneUUID, record.UUID)
+		}
+	}
+
+	// The DNSRecord is not present, nothing to do
+	return nil
+}

providers/dns/vkcloud/vkcloud.toml

@@ -0,0 +1,41 @@
+Name = "VK Cloud"
+Description = ''''''
+URL = "https://mcs.mail.ru/"
+Code = "vkcloud"
+Since = "v4.9.0"
+
+Example = '''
+VK_CLOUD_PROJECT_ID="<your_project_id>" \
+VK_CLOUD_USERNAME="<your_email>" \
+VK_CLOUD_PASSWORD="<your_password>" \
+lego --email you@example.com --dns vkcloud --domains "example.org" --domains "*.example.org" run
+'''
+
+Additional = '''
+## Credential inforamtion
+
+You can find all required and additional information on ["Project/Keys" page](https://mcs.mail.ru/app/en/project/keys) of your cloud.
+
+| ENV Variable               | Parameter from page |
+|----------------------------|---------------------|
+| VK_CLOUD_PROJECT_ID        | Project ID          |
+| VK_CLOUD_USERNAME          | Username            |
+| VK_CLOUD_DOMAIN_NAME       | User Domain Name    |
+| VK_CLOUD_IDENTITY_ENDPOINT | Identity endpoint   |
+'''
+
+[Configuration]
+  [Configuration.Credentials]
+    VK_CLOUD_PROJECT_ID = "String ID of project in VK Cloud"
+    VK_CLOUD_USERNAME = "Email of VK Cloud account"
+    VK_CLOUD_PASSWORD = "Password for VK Cloud account"
+  [Configuration.Additional]
+    VK_CLOUD_DNS_ENDPOINT="URL of DNS API. Defaults to https://mcs.mail.ru/public-dns but can be changed for usage with private clouds"
+    VK_CLOUD_IDENTITY_ENDPOINT="URL of OpenStack Auth API, Defaults to https://infra.mail.ru:35357/v3/ but can be changed for usage with private clouds"
+    VK_CLOUD_DOMAIN_NAME="Openstack users domain name. Defaults to `users` but can be changed for usage with private clouds"
+    VK_CLOUD_POLLING_INTERVAL = "Time between DNS propagation check"
+    VK_CLOUD_PROPAGATION_TIMEOUT = "Maximum waiting time for DNS propagation"
+    VK_CLOUD_TTL = "The TTL of the TXT record used for the DNS challenge"
+
+[Links]
+  API = "https://mcs.mail.ru/docs/networks/vnet/networks/publicdns/api"

providers/dns/vkcloud/vkcloud_test.go

@@ -0,0 +1,209 @@
+package vkcloud
+
+import (
+	"testing"
+
+	"github.com/go-acme/lego/v4/platform/tester"
+	"github.com/stretchr/testify/require"
+)
+
+const envDomain = envNamespace + "DOMAIN"
+
+const (
+	fakeProjectID = "an_project_id_from_vk_cloud_ui"
+	fakeUsername  = "vkclouduser@email.address"
+	fakePasswd    = "vkcloudpasswd"
+)
+
+var envTest = tester.NewEnvTest(EnvProjectID, EnvUsername, EnvPassword).WithDomain(envDomain)
+
+func TestNewDNSProvider(t *testing.T) {
+	testCases := []struct {
+		desc     string
+		envVars  map[string]string
+		expected string
+	}{
+		{
+			desc: "success",
+			envVars: map[string]string{
+				EnvProjectID: fakeProjectID,
+				EnvUsername:  fakeUsername,
+				EnvPassword:  fakePasswd,
+			},
+		},
+		{
+			desc: "missing project id",
+			envVars: map[string]string{
+				EnvUsername: fakeUsername,
+				EnvPassword: fakePasswd,
+			},
+			expected: "vkcloud: some credentials information are missing: VK_CLOUD_PROJECT_ID",
+		},
+		{
+			desc: "missing username",
+			envVars: map[string]string{
+				EnvProjectID: fakeProjectID,
+				EnvPassword:  fakePasswd,
+			},
+			expected: "vkcloud: some credentials information are missing: VK_CLOUD_USERNAME",
+		},
+		{
+			desc: "missing password",
+			envVars: map[string]string{
+				EnvProjectID: fakeProjectID,
+				EnvUsername:  fakeUsername,
+			},
+			expected: "vkcloud: some credentials information are missing: VK_CLOUD_PASSWORD",
+		},
+	}
+
+	for _, test := range testCases {
+		t.Run(test.desc, func(t *testing.T) {
+			defer envTest.RestoreEnv()
+			envTest.ClearEnv()
+
+			envTest.Apply(test.envVars)
+
+			p, err := NewDNSProvider()
+
+			if test.expected == "" {
+				require.NoError(t, err)
+				require.NotNil(t, p)
+				require.NotNil(t, p.config)
+			} else {
+				require.EqualError(t, err, test.expected)
+			}
+		})
+	}
+}
+
+func TestNewDNSProviderConfig(t *testing.T) {
+	testCases := []struct {
+		desc     string
+		config   *Config
+		expected string
+	}{
+		{
+			desc: "success",
+			config: &Config{
+				ProjectID:        fakeProjectID,
+				Username:         fakeUsername,
+				Password:         fakePasswd,
+				DNSEndpoint:      defaultDNSEndpoint,
+				IdentityEndpoint: defaultIdentityEndpoint,
+				DomainName:       defaultDomainName,
+			},
+		},
+		{
+			desc:     "nil config",
+			config:   nil,
+			expected: "vkcloud: the configuration of the DNS provider is nil",
+		},
+		{
+			desc: "missing project id",
+			config: &Config{
+				Username:         fakeUsername,
+				Password:         fakePasswd,
+				DNSEndpoint:      defaultDNSEndpoint,
+				IdentityEndpoint: defaultIdentityEndpoint,
+				DomainName:       defaultDomainName,
+			},
+			expected: "vkcloud: unable to build VK Cloud client: project id is missing in credentials information",
+		},
+		{
+			desc: "missing username",
+			config: &Config{
+				ProjectID:        fakeProjectID,
+				Password:         fakePasswd,
+				DNSEndpoint:      defaultDNSEndpoint,
+				IdentityEndpoint: defaultIdentityEndpoint,
+				DomainName:       defaultDomainName,
+			},
+			expected: "vkcloud: unable to build VK Cloud client: username is missing in credentials information",
+		},
+		{
+			desc: "missing password",
+			config: &Config{
+				ProjectID:        fakeProjectID,
+				Username:         fakeUsername,
+				DNSEndpoint:      defaultDNSEndpoint,
+				IdentityEndpoint: defaultIdentityEndpoint,
+				DomainName:       defaultDomainName,
+			},
+			expected: "vkcloud: unable to build VK Cloud client: password is missing in credentials information",
+		},
+		{
+			desc: "missing dns endpoint",
+			config: &Config{
+				ProjectID:        fakeProjectID,
+				Username:         fakeUsername,
+				Password:         fakePasswd,
+				IdentityEndpoint: defaultIdentityEndpoint,
+				DomainName:       defaultDomainName,
+			},
+			expected: "vkcloud: DNS endpoint is missing in config",
+		},
+		{
+			desc: "missing identity endpoint",
+			config: &Config{
+				ProjectID:   fakeProjectID,
+				Username:    fakeUsername,
+				Password:    fakePasswd,
+				DNSEndpoint: defaultDNSEndpoint,
+				DomainName:  defaultDomainName,
+			},
+			expected: "vkcloud: unable to build VK Cloud client: identity endpoint is missing in config",
+		},
+		{
+			desc: "missing domain name",
+			config: &Config{
+				ProjectID:        fakeProjectID,
+				Username:         fakeUsername,
+				Password:         fakePasswd,
+				DNSEndpoint:      defaultDNSEndpoint,
+				IdentityEndpoint: defaultIdentityEndpoint,
+			},
+			expected: "vkcloud: unable to build VK Cloud client: domain name is missing in config",
+		},
+	}
+
+	for _, test := range testCases {
+		t.Run(test.desc, func(t *testing.T) {
+			p, err := NewDNSProviderConfig(test.config)
+
+			if test.expected == "" {
+				require.NoError(t, err)
+				require.NotNil(t, p)
+				require.NotNil(t, p.config)
+			} else {
+				require.EqualError(t, err, test.expected)
+			}
+		})
+	}
+}
+
+func TestLivePresent(t *testing.T) {
+	if !envTest.IsLiveTest() {
+		t.Skip("skipping live test")
+	}
+
+	envTest.RestoreEnv()
+	provider, err := NewDNSProvider()
+	require.NoError(t, err)
+
+	err = provider.Present(envTest.GetDomain(), "", "123d==")
+	require.NoError(t, err)
+}
+
+func TestLiveCleanUp(t *testing.T) {
+	if !envTest.IsLiveTest() {
+		t.Skip("skipping live test")
+	}
+
+	envTest.RestoreEnv()
+	provider, err := NewDNSProvider()
+	require.NoError(t, err)
+
+	err = provider.CleanUp(envTest.GetDomain(), "", "123d==")
+	require.NoError(t, err)
+}