# 1、安装


```bash
wget https://github.com/coredns/coredns/releases/download/v1.4.0/coredns_1.4.0_linux_amd64.tgz
```
# 2、启动
```bash
touch Corefile
vi Corefile
```
```toml
# vi Corefile
. {
    proxy . 223.5.5.5:53 223.6.6.6:53 {
        protocol dns
        policy round_robin
    }
    #hosts
    reload 10s
    #loadbalance round_robin
    prometheus
    errors
    log
}
```
```bash
./coredns -conf Corefile -dns.port 1053
# http://127.0.0.1:9153/metrics
```
```bash
# 测试
dig +short -p 1053 @127.0.0.1 baidu.com
dig +noall +answer AAAA -p 1053 @127.0.0.1 youku.com
```

# 3、DNS记录类型

* A (Host address)
* AAAA (IPv6 host address)
* ALIAS (Auto resolved alias)
* CNAME (Canonical name for an alias)
* MX (Mail eXchange)
* NS (Name Server)
* PTR (Pointer)
* SOA (Start Of Authority)
* SRV (location of service)
* TXT (Descriptive text)

# 4、DNS SRV

# 5、参考

* [releases](https://github.com/coredns/coredns/releases)