004c5fca9d
Abstract the caddy call and make it simpler. See #3261 for some part of the discussion. Go from: ~~~ go func init() { caddy.RegisterPlugin("any", caddy.Plugin{ ServerType: "dns", Action: setup, }) } ~~~ To: ~~~ go func init() { plugin.Register("any", setup) } ~~~ This requires some external documents in coredns.io to be updated as well; the old way still works, so it's backwards compatible. Signed-off-by: Miek Gieben <miek@miek.nl>
81 lines
1.6 KiB
Go
81 lines
1.6 KiB
Go
package external
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import (
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"strconv"
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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/caddyserver/caddy"
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)
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func init() { plugin.Register("k8s_external", setup) }
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func setup(c *caddy.Controller) error {
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e, err := parse(c)
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if err != nil {
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return plugin.Error("k8s_external", err)
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}
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// Do this in OnStartup, so all plugins have 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.(Externaler); ok {
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e.externalFunc = x.External
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e.externalAddrFunc = x.ExternalAddress
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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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e.Next = next
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return e
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})
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return nil
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}
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func parse(c *caddy.Controller) (*External, error) {
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e := New()
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for c.Next() { // external
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zones := c.RemainingArgs()
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e.Zones = zones
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if len(zones) == 0 {
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e.Zones = make([]string, len(c.ServerBlockKeys))
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copy(e.Zones, c.ServerBlockKeys)
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}
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for i, str := range e.Zones {
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e.Zones[i] = plugin.Host(str).Normalize()
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}
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for c.NextBlock() {
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switch c.Val() {
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case "ttl":
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args := c.RemainingArgs()
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if len(args) == 0 {
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return nil, c.ArgErr()
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}
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t, err := strconv.Atoi(args[0])
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if err != nil {
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return nil, err
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}
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if t < 0 || t > 3600 {
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return nil, c.Errf("ttl must be in range [0, 3600]: %d", t)
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}
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e.ttl = uint32(t)
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case "apex":
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args := c.RemainingArgs()
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if len(args) == 0 {
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return nil, c.ArgErr()
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}
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e.apex = args[0]
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default:
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return nil, c.Errf("unknown property '%s'", c.Val())
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}
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}
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}
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return e, nil
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}
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