coredns 编译模式添加插件

备注：

   coredns 默认已经安装了一些插件，比如大家用的多的kubernetes etcd ... 但是我们可以自己编译插件，构建我们自己的

coredns 版本，方便集成使用

1. 项目结构

├── Corefile

├── coredns.go

2. 参考代码

a. main.go

package main

import (

        _ "github.com/coredns/example"

        "github.com/coredns/coredns/coremain"

        _ "github.com/coredns/coredns/plugin/auto"

	_ "github.com/coredns/coredns/plugin/autopath"

	_ "github.com/coredns/coredns/plugin/bind"

	_ "github.com/coredns/coredns/plugin/cache"

	_ "github.com/coredns/coredns/plugin/chaos"

	_ "github.com/coredns/coredns/plugin/debug"

	_ "github.com/coredns/coredns/plugin/dnssec"

	_ "github.com/coredns/coredns/plugin/dnstap"

	_ "github.com/coredns/coredns/plugin/erratic"

	_ "github.com/coredns/coredns/plugin/errors"

	_ "github.com/coredns/coredns/plugin/etcd"

	_ "github.com/coredns/coredns/plugin/federation"

	_ "github.com/coredns/coredns/plugin/file"

	_ "github.com/coredns/coredns/plugin/health"

	_ "github.com/coredns/coredns/plugin/hosts"

	_ "github.com/coredns/coredns/plugin/kubernetes"

	_ "github.com/coredns/coredns/plugin/loadbalance"

	_ "github.com/coredns/coredns/plugin/log"

	_ "github.com/coredns/coredns/plugin/metrics"

	_ "github.com/coredns/coredns/plugin/nsid"

	_ "github.com/coredns/coredns/plugin/pprof"

	_ "github.com/coredns/coredns/plugin/proxy"

	_ "github.com/coredns/coredns/plugin/reload"

	_ "github.com/coredns/coredns/plugin/reverse"

	_ "github.com/coredns/coredns/plugin/rewrite"

	_ "github.com/coredns/coredns/plugin/root"

	_ "github.com/coredns/coredns/plugin/route53"

	_ "github.com/coredns/coredns/plugin/secondary"

	_ "github.com/coredns/coredns/plugin/template"

	_ "github.com/coredns/coredns/plugin/tls"

	_ "github.com/coredns/coredns/plugin/trace"

	_ "github.com/coredns/coredns/plugin/whoami"

	_ "github.com/coredns/example"

	_ "github.com/coredns/forward"

	_ "github.com/mholt/caddy/onevent"

        _ "github.com/mholt/caddy/startupshutdown"

        _ "github.com/arvancloud/redis"

        "github.com/coredns/coredns/core/dnsserver"

)

var directives = []string{

        "example",

        "tls",

	"reload",

	"nsid",

	"root",

	"bind",

	"debug",

	"trace",

	"health",

	"pprof",

	"prometheus",

	"errors",

	"log",

	"dnstap",

	"chaos",

	"loadbalance",

	"cache",

	"rewrite",

	"dnssec",

	"autopath",

	"reverse",

	"template",

	"hosts",

	"route53",

	"federation",

	"kubernetes",

	"file",

	"auto",

        "secondary",

        "etcd",

        "redis",

	"forward",

	"proxy",

	"erratic",

	"whoami",

	"on",

	"startup",

	"shutdown",

}

func init() {

        dnsserver.Directives = directives

}

func main() {

        coremain.Run()

}

b. Corefile

example.com {

  proxy . 8.8.8.8:53

  log

  example

}

3. 代码说明

a. main.go

为集成全部插件，我使用了 coredns 源码中的plugins 配置代码里面包含了默认的全部，同时我添加了

官方的example  以及一个redis 插件

b. Corefile

配置文件使用已有的插件  example

4. 构建

a. 依赖包安装

简答的方式是使用源码包中的make 脚本，对于没有的使用go get  进行安装

b. 构建

go build

c. 查看编译的插件

./main -plugins

Password:

Server types:

  dns

Caddyfile loaders:

  flag

  default

Other plugins:

  dns.auto

  dns.autopath

  dns.bind

  dns.cache

  dns.chaos

  dns.debug

  dns.dnssec

  dns.dnstap

  dns.erratic

  dns.errors

  dns.etcd

  dns.example

  dns.federation

  dns.file

  dns.forward

  dns.health

  dns.hosts

  dns.kubernetes

  dns.loadbalance

  dns.log

  dns.nsid

  dns.pprof

  dns.prometheus

  dns.proxy

  dns.redis

  dns.reload

  dns.reverse

  dns.rewrite

  dns.root

  dns.route53

  dns.secondary

  dns.template

  dns.tls

  dns.trace

  dns.whoami

  on

  shutdown

  startup

5. 运行

sudo ./main -conf Corefile

参考日志：

example.com.:53

2018/02/02 22:32:12 [INFO] CoreDNS-1.0.5

2018/02/02 22:32:12 [INFO] darwin/amd64, go1.9.3,

CoreDNS-1.0.5

darwin/amd64, go1.9.3,

2018/02/02 22:32:12 [INFO] "A IN connpm.gj.qq.com." - No such zone at dns://:53 (Remote: 192.168.31.161:59752)

2018/02/02 22:32:41 [INFO] "A IN www.thoughtworks.com." - No such zone at dns://:53 (Remote: 192.168.31.161:52965)

2018/02/02 22:32:45 [INFO] "A IN static.thoughtworks.com." - No such zone at dns://:53 (Remote: 192.168.31.161:54903)

2018/02/02 22:32:45 [INFO] "A IN s7.addthis.com." - No such zone at dns://:53 (Remote: 192.168.31.161:63212)

2018/02/02 22:32:45 [INFO] "A IN qzonestyle.gtimg.cn." - No such zone at dns://:53 (Remote: 192.168.31.161:54212)

2018/02/02 22:32:45 [INFO] "A IN app-e.marketo.com." - No such zone at dns://:53 (Remote: 192.168.31.161:62861)

2018/02/02 22:32:45 [INFO] "A IN dynamic.thoughtworks.com." - No such zone at dns://:53 (Remote: 192.168.31.161:54761)

2018/02/02 22:3

。。。。。

6. 参考资料

https://github.com/coredns/example

https://github.com/arvancloud/redis

https://github.com/coredns/coredns

https://coredns.io/2017/07/25/compile-time-enabling-or-disabling-plugins/