CoreDNS

Service-håndtering

Kontrollér status for CoreDNS:

systemctl status coredns

Genstart CoreDNS:

systemctl restart coredns

Genindlæs CoreDNS:

systemctl reload coredns

Stop CoreDNS:

systemctl stop coredns

Start CoreDNS:

systemctl start coredns

Se CoreDNS-logs:

journalctl -u coredns -f

DNS-konfiguration

CoreDNS' primære konfiguration er:

/etc/coredns/Corefile

Standardkonfigurationen videresender DNS-forespørgsler til:

1.1.1.1 8.8.8.8

Konfigurer Corefile efter dine specifikke behov og anvendelse.

Genstart CoreDNS efter ændring af Corefile:

systemctl restart coredns

DNS-endpoints

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

Vigtige filer og mapper

• Binærfil: /usr/bin/coredns
• Corefile: /etc/coredns/Corefile
• Tjeneste: /etc/systemd/system/coredns.service
• Sysusers: /usr/lib/sysusers.d/coredns.conf
• Tmpfiles: /usr/lib/tmpfiles.d/coredns.conf
• Logrotate: /etc/logrotate.d/coredns
• Datamappe: /var/lib/coredns
• Logfil: /var/log/coredns.log
• Fejllog: /var/log/coredns.err.log
• Resolver-tilsidesættelse: /etc/systemd/resolved.conf.d/99-coredns.conf

Test DNS-opløsning

Forespørg CoreDNS direkte:

dig @127.0.0.1 example.com

Eller forespørg den via serverens IP:

dig @<SERVER-IP> example.com

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

nameserver 127.0.0.1

Bemærkninger

• CoreDNS uses systemd-resolved konfigurationsændringer for at frigøre port 53.
• The host resolver is pointed to 127.0.0.1.
• DNS-forespørgsler videresendes til de konfigurerede upstream-resolvere.
• CoreDNS runs under the dedicated coredns system user.