22c6e3e179
`upstream` is not needed as a setting; just set if unconditionally and remove all documentation and tests for it. At some point we want remove the hanlding for `upstream` as well and error out on seeing it. Signed-off-by: Miek Gieben <miek@miek.nl>
94 lines
1.8 KiB
Go
94 lines
1.8 KiB
Go
package federation
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import (
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"fmt"
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"github.com/coredns/coredns/core/dnsserver"
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"github.com/coredns/coredns/plugin"
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"github.com/coredns/coredns/plugin/kubernetes"
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"github.com/coredns/coredns/plugin/pkg/upstream"
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"github.com/miekg/dns"
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"github.com/mholt/caddy"
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)
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func init() {
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caddy.RegisterPlugin("federation", caddy.Plugin{
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ServerType: "dns",
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Action: setup,
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})
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}
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func setup(c *caddy.Controller) error {
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fed, err := federationParse(c)
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if err != nil {
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return plugin.Error("federation", err)
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}
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// Do this in OnStartup, so all plugin has been initialized.
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c.OnStartup(func() error {
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m := dnsserver.GetConfig(c).Handler("kubernetes")
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if m == nil {
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return nil
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}
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if x, ok := m.(*kubernetes.Kubernetes); ok {
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fed.Federations = x.Federations
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}
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return nil
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})
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dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
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fed.Next = next
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return fed
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})
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return nil
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}
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func federationParse(c *caddy.Controller) (*Federation, error) {
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fed := New()
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fed.Upstream = upstream.New()
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for c.Next() {
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// federation [zones..]
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zones := c.RemainingArgs()
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var origins []string
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if len(zones) > 0 {
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origins = make([]string, len(zones))
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copy(origins, zones)
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} else {
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origins = make([]string, len(c.ServerBlockKeys))
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copy(origins, c.ServerBlockKeys)
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}
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for c.NextBlock() {
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x := c.Val()
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switch x {
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case "upstream":
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// remove soon
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c.RemainingArgs()
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default:
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args := c.RemainingArgs()
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if x := len(args); x != 1 {
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return fed, fmt.Errorf("need two arguments for federation, got %d", x)
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}
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fed.f[x] = dns.Fqdn(args[0])
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}
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}
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for i := range origins {
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origins[i] = plugin.Host(origins[i]).Normalize()
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}
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fed.zones = origins
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if len(fed.f) == 0 {
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return fed, fmt.Errorf("at least one name to zone federation expected")
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}
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return fed, nil
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}
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return fed, nil
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}
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