CoreDNS

Manajemen Layanan

Periksa status CoreDNS:

systemctl status coredns

Mulai ulang CoreDNS:

systemctl restart coredns

Muat ulang CoreDNS:

systemctl reload coredns

Hentikan CoreDNS:

systemctl stop coredns

Jalankan CoreDNS:

systemctl start coredns

Lihat log CoreDNS:

journalctl -u coredns -f

Konfigurasi DNS

Konfigurasi utama CoreDNS adalah:

/etc/coredns/Corefile

Konfigurasi bawaan meneruskan kueri DNS ke:

1.1.1.1 8.8.8.8

Konfigurasikan Corefile sesuai kebutuhan dan kasus penggunaan Anda.

Setelah mengubah Corefile, mulai ulang CoreDNS:

systemctl restart coredns

Endpoint DNS

• DNS: 53/tcp dan 53/udp
• Health: http://127.0.0.1:8080/health
• Ready: http://127.0.0.1:8181/ready
• Metrik: http://127.0.0.1:9153/metrics

File dan Direktori Penting

• Biner: /usr/bin/coredns
• Corefile: /etc/coredns/Corefile
• Layanan: /etc/systemd/system/coredns.service
• Sysusers: /usr/lib/sysusers.d/coredns.conf
• Tmpfiles: /usr/lib/tmpfiles.d/coredns.conf
• Logrotate: /etc/logrotate.d/coredns
• Direktori Data: /var/lib/coredns
• Berkas log: /var/log/coredns.log
• Log kesalahan: /var/log/coredns.err.log
• Override resolver: /etc/systemd/resolved.conf.d/99-coredns.conf

Menguji resolusi DNS

Kueri CoreDNS secara langsung:

dig @127.0.0.1 example.com

Atau kueri melalui alamat IP server:

dig @<SERVER-IP> example.com

The host's /etc/resolv.conf is configured to use:

nameserver 127.0.0.1

Catatan

• CoreDNS uses systemd-resolved perubahan konfigurasi untuk membebaskan port 53.
• The host resolver is pointed to 127.0.0.1.
• Kueri DNS diteruskan ke resolver upstream yang dikonfigurasi.
• CoreDNS runs under the dedicated coredns system user.