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package clouddns
import (
"context"
"strings"
"github.com/coredns/caddy"
"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"
gcp "google.golang.org/api/dns/v1"
"google.golang.org/api/option"
)
var log = clog.NewWithPlugin("clouddns")
func init() { plugin.Register("clouddns", setup) }
// exposed for testing
var f = func(ctx context.Context, opt option.ClientOption) (gcpDNS, error) {
var err error
var client *gcp.Service
if opt != nil {
client, err = gcp.NewService(ctx, opt)
} else {
// if credentials file is not provided in the Corefile
// authenticate the client using env variables
client, err = gcp.NewService(ctx)
}
return gcpClient{client}, err
}
func setup(c *caddy.Controller) error {
for c.Next() {
keyPairs := map[string]struct{}{}
keys := map[string][]string{}
var fall fall.F
up := upstream.New()
args := c.RemainingArgs()
for i := 0; i < len(args); i++ {
parts := strings.SplitN(args[i], ":", 3)
if len(parts) != 3 {
return plugin.Error("clouddns", c.Errf("invalid zone %q", args[i]))
}
dnsName, projectName, hostedZone := parts[0], parts[1], parts[2]
if dnsName == "" || projectName == "" || hostedZone == "" {
return plugin.Error("clouddns", c.Errf("invalid zone %q", args[i]))
}
if _, ok := keyPairs[args[i]]; ok {
return plugin.Error("clouddns", c.Errf("conflict zone %q", args[i]))
}
keyPairs[args[i]] = struct{}{}
keys[dnsName] = append(keys[dnsName], projectName+":"+hostedZone)
}
var opt option.ClientOption
for c.NextBlock() {
switch c.Val() {
case "upstream":
c.RemainingArgs()
case "credentials":
if c.NextArg() {
opt = option.WithCredentialsFile(c.Val())
} else {
return plugin.Error("clouddns", c.ArgErr())
}
case "fallthrough":
fall.SetZonesFromArgs(c.RemainingArgs())
default:
return plugin.Error("clouddns", c.Errf("unknown property %q", c.Val()))
}
}
ctx, cancel := context.WithCancel(context.Background())
client, err := f(ctx, opt)
if err != nil {
return err
}
h, err := New(ctx, client, keys, up)
if err != nil {
return plugin.Error("clouddns", c.Errf("failed to create plugin: %v", err))
}
h.Fall = fall
if err := h.Run(ctx); err != nil {
return plugin.Error("clouddns", c.Errf("failed to initialize plugin: %v", err))
}
dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
h.Next = next
return h
})
c.OnShutdown(func() error { cancel(); return nil })
}
return nil
}
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