refactor(dns): extrat dns server #2425

Job	Run time
x86_64-unknown-linux-gnu	15m 31s
i686-unknown-linux-gnu	15m 59s
x86_64-unknown-linux-musl	16m 10s
x86_64-unknown-linux-gnu-static-crt	16m 1s
i686-unknown-linux-gnu-static-crt	15m 56s
aarch64-unknown-linux-gnu	16m 20s
armv7-unknown-linux-gnueabi	15m 53s
armv7-unknown-linux-gnueabihf	16m 40s
aarch64-unknown-linux-musl	16m 16s
armv7-unknown-linux-musleabihf	16m 49s
aarch64-unknown-linux-gnu-static-crt	16m 18s
armv7-unknown-linux-gnueabi-static-crt	17m 1s
x86_64-pc-windows-msvc	25m 27s
i686-pc-windows-msvc	29m 38s
aarch64-pc-windows-msvc	14m 21s
x86_64-pc-windows-msvc-static-crt	25m 53s
i686-pc-windows-msvc-static-crt	27m 38s
aarch64-pc-windows-msvc-static-crt	13m 10s
x86_64-apple-darwin	18m 28s
aarch64-apple-darwin	12m 48s
x86_64-apple-darwin-static-crt	29m 43s
aarch64-apple-darwin-static-crt	15m 48s
Release	29s
Docker Image	0s
	6h 48m 17s

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