Add plugin for Azure DNS (#2945)

* Add plugin for Azure DNS Signed-off-by: darshanime <deathbullet@gmail.com> * Rename AzureDNS plugin to Azure Signed-off-by: darshanime <deathbullet@gmail.com> * remove upstream from azure syntax Signed-off-by: darshanime <deathbullet@gmail.com> * Rename azure plugin block keynames Signed-off-by: darshanime <deathbullet@gmail.com> * Normalize zone name before lookup in zones Signed-off-by: darshanime <deathbullet@gmail.com> * Update import path for caddy Signed-off-by: darshanime <deathbullet@gmail.com> * normalize azure zone name only if required Signed-off-by: darshanime <deathbullet@gmail.com> * Add support for MX, SRV, TXT, records Signed-off-by: darshanime <deathbullet@gmail.com> * Add specs for new record types Signed-off-by: darshanime <deathbullet@gmail.com> * Use sequential updates for zones Signed-off-by: darshanime <deathbullet@gmail.com> * Add OWNERS file for azure plugin Signed-off-by: darshanime <deathbullet@gmail.com> * Rename imports for third party packages Signed-off-by: darshanime <deathbullet@gmail.com> * Capitalize values in README Signed-off-by: darshanime <deathbullet@gmail.com> * Shorten keys for azure plugin config Signed-off-by: darshanime <deathbullet@gmail.com> * Fixup readme for azure plugin Signed-off-by: darshanime <deathbullet@gmail.com>
2025-10-27 08:14:18 -04:00 · 2019-08-09 12:40:28 +05:30
parent 5b74d0f957
commit 879466b028
11 changed files with 825 additions and 61 deletions
--- a/plugin/azure/setup.go
+++ b/plugin/azure/setup.go
@@ -0,0 +1,123 @@
+package azure
+
+import (
+	"context"
+	"strings"
+
+	"github.com/coredns/coredns/core/dnsserver"
+	"github.com/coredns/coredns/plugin"
+	"github.com/coredns/coredns/plugin/pkg/fall"
+	clog "github.com/coredns/coredns/plugin/pkg/log"
+	"github.com/coredns/coredns/plugin/pkg/upstream"
+
+	azuredns "github.com/Azure/azure-sdk-for-go/profiles/latest/dns/mgmt/dns"
+	azurerest "github.com/Azure/go-autorest/autorest/azure"
+	"github.com/Azure/go-autorest/autorest/azure/auth"
+	"github.com/caddyserver/caddy"
+)
+
+var log = clog.NewWithPlugin("azure")
+
+func init() {
+	caddy.RegisterPlugin("azure", caddy.Plugin{
+		ServerType: "dns",
+		Action:     setup,
+	})
+}
+
+func setup(c *caddy.Controller) error {
+	env, keys, fall, err := parse(c)
+	if err != nil {
+		return plugin.Error("azure", err)
+	}
+	ctx := context.Background()
+	dnsClient := azuredns.NewRecordSetsClient(env.Values[auth.SubscriptionID])
+	dnsClient.Authorizer, err = env.GetAuthorizer()
+	if err != nil {
+		return c.Errf("failed to create azure plugin: %v", err)
+	}
+	h, err := New(ctx, dnsClient, keys, upstream.New())
+	if err != nil {
+		return c.Errf("failed to initialize azure plugin: %v", err)
+	}
+	h.Fall = fall
+	if err := h.Run(ctx); err != nil {
+		return c.Errf("failed to run azure plugin: %v", err)
+	}
+	dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
+		h.Next = next
+		return h
+	})
+	return nil
+}
+
+func parse(c *caddy.Controller) (auth.EnvironmentSettings, map[string][]string, fall.F, error) {
+	resourceGroupMapping := map[string][]string{}
+	resourceGroupSet := map[string]struct{}{}
+	var err error
+	var fall fall.F
+
+	azureEnv := azurerest.PublicCloud
+	env := auth.EnvironmentSettings{Values: map[string]string{}}
+
+	for c.Next() {
+		args := c.RemainingArgs()
+
+		for i := 0; i < len(args); i++ {
+			parts := strings.SplitN(args[i], ":", 2)
+			if len(parts) != 2 {
+				return env, resourceGroupMapping, fall, c.Errf("invalid resource group / zone '%s'", args[i])
+			}
+			resourceGroup, zoneName := parts[0], parts[1]
+			if resourceGroup == "" || zoneName == "" {
+				return env, resourceGroupMapping, fall, c.Errf("invalid resource group / zone '%s'", args[i])
+			}
+			if _, ok := resourceGroupSet[args[i]]; ok {
+				return env, resourceGroupMapping, fall, c.Errf("conflict zone '%s'", args[i])
+			}
+
+			resourceGroupSet[args[i]] = struct{}{}
+			resourceGroupMapping[resourceGroup] = append(resourceGroupMapping[resourceGroup], zoneName)
+		}
+		for c.NextBlock() {
+			switch c.Val() {
+			case "subscription":
+				if !c.NextArg() {
+					return env, resourceGroupMapping, fall, c.ArgErr()
+				}
+				env.Values[auth.SubscriptionID] = c.Val()
+			case "tenant":
+				if !c.NextArg() {
+					return env, resourceGroupMapping, fall, c.ArgErr()
+				}
+				env.Values[auth.TenantID] = c.Val()
+			case "client":
+				if !c.NextArg() {
+					return env, resourceGroupMapping, fall, c.ArgErr()
+				}
+				env.Values[auth.ClientID] = c.Val()
+			case "secret":
+				if !c.NextArg() {
+					return env, resourceGroupMapping, fall, c.ArgErr()
+				}
+				env.Values[auth.ClientSecret] = c.Val()
+			case "environment":
+				if !c.NextArg() {
+					return env, resourceGroupMapping, fall, c.ArgErr()
+				}
+				env.Values[auth.ClientSecret] = c.Val()
+				azureEnv, err = azurerest.EnvironmentFromName(c.Val())
+				if err != nil {
+					return env, resourceGroupMapping, fall, c.Errf("cannot set azure environment: %s", err.Error())
+				}
+			case "fallthrough":
+				fall.SetZonesFromArgs(c.RemainingArgs())
+			default:
+				return env, resourceGroupMapping, fall, c.Errf("unknown property '%s'", c.Val())
+			}
+		}
+	}
+	env.Values[auth.Resource] = azureEnv.ResourceManagerEndpoint
+	env.Environment = azureEnv
+	return env, resourceGroupMapping, fall, nil
+}