9ac3cab1b7
* Make CoreDNS a server type plugin for Caddy Remove code we don't need and port all middleware over. Fix all tests and rework the documentation. Also make `go generate` build a caddy binary which we then copy into our directory. This means `go build`-builds remain working as-is. And new etc instances in each etcd test for better isolation. Fix more tests and rework test.Server with the newer support Caddy offers. Fix Makefile to support new mode of operation.
133 lines
2.4 KiB
Go
133 lines
2.4 KiB
Go
package errors
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import (
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"io"
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"log"
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"os"
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"github.com/miekg/coredns/core/dnsserver"
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"github.com/miekg/coredns/middleware"
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"github.com/hashicorp/go-syslog"
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"github.com/mholt/caddy"
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)
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func init() {
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caddy.RegisterPlugin("errors", 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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handler, err := errorsParse(c)
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if err != nil {
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return err
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}
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var writer io.Writer
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switch handler.LogFile {
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case "visible":
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handler.Debug = true
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case "stdout":
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writer = os.Stdout
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case "stderr":
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writer = os.Stderr
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case "syslog":
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writer, err = gsyslog.NewLogger(gsyslog.LOG_ERR, "LOCAL0", "coredns")
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if err != nil {
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return err
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}
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default:
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if handler.LogFile == "" {
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writer = os.Stderr // default
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break
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}
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var file *os.File
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file, err = os.OpenFile(handler.LogFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0644)
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if err != nil {
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return err
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}
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if handler.LogRoller != nil {
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file.Close()
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handler.LogRoller.Filename = handler.LogFile
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writer = handler.LogRoller.GetLogWriter()
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} else {
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writer = file
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}
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}
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handler.Log = log.New(writer, "", 0)
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dnsserver.GetConfig(c).AddMiddleware(func(next dnsserver.Handler) dnsserver.Handler {
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handler.Next = next
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return handler
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})
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return nil
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}
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func errorsParse(c *caddy.Controller) (ErrorHandler, error) {
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handler := ErrorHandler{}
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optionalBlock := func() (bool, error) {
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var hadBlock bool
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for c.NextBlock() {
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hadBlock = true
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what := c.Val()
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if !c.NextArg() {
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return hadBlock, c.ArgErr()
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}
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where := c.Val()
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if what == "log" {
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if where == "visible" {
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handler.Debug = true
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} else {
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handler.LogFile = where
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if c.NextArg() {
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if c.Val() == "{" {
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c.IncrNest()
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logRoller, err := middleware.ParseRoller(c)
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if err != nil {
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return hadBlock, err
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}
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handler.LogRoller = logRoller
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}
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}
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}
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}
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}
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return hadBlock, nil
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}
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for c.Next() {
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// weird hack to avoid having the handler values overwritten.
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if c.Val() == "}" {
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continue
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}
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// Configuration may be in a block
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hadBlock, err := optionalBlock()
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if err != nil {
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return handler, err
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}
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// Otherwise, the only argument would be an error log file name or 'visible'
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if !hadBlock {
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if c.NextArg() {
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if c.Val() == "visible" {
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handler.Debug = true
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} else {
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handler.LogFile = c.Val()
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}
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}
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}
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}
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return handler, nil
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}
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