Powerdns stop workin after update

adkomodir · June 30, 2025, 9:13am

hi. after i update cyberpanel to latest 2.4.2 version, i figured my powerdns service was stopped and can’t run again. can anyone help me?

# systemctl status pdns
● pdns.service - PowerDNS Authoritative Server
     Loaded: loaded (/lib/systemd/system/pdns.service; disabled; vendor preset: enabled)
     Active: activating (auto-restart) (Result: exit-code) since Mon 2025-06-30 12:37:41 +0330; 878ms ago
       Docs: man:pdns_server(1)
             man:pdns_control(1)
             https://doc.powerdns.com
    Process: 97586 ExecStart=/usr/sbin/pdns_server --guardian=no --daemon=no --disable-syslog --log-timestamp=no ->
   Main PID: 97586 (code=exited, status=1/FAILURE)
        CPU: 93ms

and my powerdns installed in this path:

ls /etc/powerdns/
named.conf  pdns.conf  pdns.d

thank’s

usmannasir · June 30, 2025, 4:26pm

Thanks for reporting this issue. After reviewing the upgrade code, I’ve identified the problem and have troubleshooting steps for you.

Root Cause: PowerDNS isn’t being restarted after package upgrades, and there may be a MySQL connection issue.

Troubleshooting Steps:

Check MySQL Connection on Port 3306:

Verify MySQL is listening on port 3306

netstat -tlnp | grep 3306

Test MySQL connection

mysql -h 127.0.0.1 -P 3306 -u cyberpanel -p cyberpanel

Verify PowerDNS Configuration:

Check config file permissions

ls -la /etc/powerdns/pdns.conf

Verify MySQL password in config matches actual password

grep gmysql-password /etc/powerdns/pdns.conf

Check PowerDNS Error Logs:

View detailed error

journalctl -u pdns -n 50

Check syslog for PowerDNS errors

grep pdns /var/log/syslog | tail -20

Manual Fix Steps:

Fix permissions if needed

sudo chown root:pdns /etc/powerdns/pdns.conf
sudo chmod 640 /etc/powerdns/pdns.conf

Try starting PowerDNS manually

sudo systemctl start pdns

If that fails, try running directly to see errors

sudo -u pdns /usr/sbin/pdns_server --daemon=no --guardian=no

If MySQL Password Mismatch:
- Get the correct password from /usr/local/CyberCP/CyberCP/settings.py
- Update it in /etc/powerdns/pdns.conf (gmysql-password line)

Permanent Fix: We’ll add PowerDNS restart to the upgrade script in the next release.

Let me know which error you see in the logs, and I can provide more specific guidance.

adkomodir · July 1, 2025, 7:37am

here is the results:

# netstat -tlnp | grep 3306
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      718329/mariadbd

# ls -la /etc/powerdns/pdns.conf
-rwxr-xr-x 1 root root 14644 Jun 29 10:26 /etc/powerdns/pdns.conf

# grep pdns /var/log/syslog | tail -20
Jul  1 10:46:02 srv5976184519 systemd[1]: pdns.service: Main process exited, code=exited, status=1/FAILURE
Jul  1 10:46:02 srv5976184519 systemd[1]: pdns.service: Failed with result 'exit-code'.
Jul  1 10:46:04 srv5976184519 systemd[1]: pdns.service: Scheduled restart job, restart counter is at 63674.
Jul  1 10:46:04 srv5976184519 pdns_server[729014]: Loading '/usr/lib/x86_64-linux-gnu/pdns/libgmysqlbackend.so'
Jul  1 10:46:04 srv5976184519 pdns_server[729014]: This is a standalone pdns
Jul  1 10:46:04 srv5976184519 pdns_server[729014]: Listening on controlsocket in '/run/pdns/pdns.controlsocket'
Jul  1 10:46:04 srv5976184519 pdns_server[729014]: WARNING: MYSQL_OPT_RECONNECT is deprecated and will be removed in a future version.
Jul  1 10:46:04 srv5976184519 pdns_server[729014]: Unable to bind UDP socket to '0.0.0.0:53': Address already in use
Jul  1 10:46:04 srv5976184519 pdns_server[729014]: Fatal error: Unable to bind to UDP socket
Jul  1 10:46:04 srv5976184519 systemd[1]: pdns.service: Main process exited, code=exited, status=1/FAILURE
Jul  1 10:46:04 srv5976184519 systemd[1]: pdns.service: Failed with result 'exit-code'.
Jul  1 10:46:05 srv5976184519 systemd[1]: pdns.service: Scheduled restart job, restart counter is at 63675.
Jul  1 10:46:05 srv5976184519 pdns_server[729022]: Loading '/usr/lib/x86_64-linux-gnu/pdns/libgmysqlbackend.so'
Jul  1 10:46:05 srv5976184519 pdns_server[729022]: This is a standalone pdns
Jul  1 10:46:05 srv5976184519 pdns_server[729022]: Listening on controlsocket in '/run/pdns/pdns.controlsocket'
Jul  1 10:46:05 srv5976184519 pdns_server[729022]: WARNING: MYSQL_OPT_RECONNECT is deprecated and will be removed in a future version.
Jul  1 10:46:05 srv5976184519 pdns_server[729022]: Unable to bind UDP socket to '0.0.0.0:53': Address already in use
Jul  1 10:46:05 srv5976184519 pdns_server[729022]: Fatal error: Unable to bind to UDP socket
Jul  1 10:46:05 srv5976184519 systemd[1]: pdns.service: Main process exited, code=exited, status=1/FAILURE
Jul  1 10:46:05 srv5976184519 systemd[1]: pdns.service: Failed with result 'exit-code'.

# sudo chown root:pdns /etc/powerdns/pdns.conf

# sudo chmod 640 /etc/powerdns/pdns.conf

# sudo systemctl start pdns
Job for pdns.service failed because the control process exited with error code.
See "systemctl status pdns.service" and "journalctl -xeu pdns.service" for details.

# sudo -u pdns /usr/sbin/pdns_server --daemon=no --guardian=no
Jul 01 10:47:16 Loading '/usr/lib/x86_64-linux-gnu/pdns/libgmysqlbackend.so'
Jul 01 10:47:16 This is a standalone pdns
Jul 01 10:47:16 Unable to create socket directory (/var/run/pdns/) and it does not exist yet

also the mysql password is correct.

i update to new release too but the problem still there.

# journalctl -u pdns -n 50
Jul 01 11:08:05 srv5976184519 systemd[1]: Stopped PowerDNS Authoritative Server.
Jul 01 11:08:05 srv5976184519 systemd[1]: Starting PowerDNS Authoritative Server...
Jul 01 11:08:05 srv5976184519 pdns_server[57186]: Loading '/usr/lib/x86_64-linux-gnu/pdns/libgmysqlbackend.so'
Jul 01 11:08:05 srv5976184519 pdns_server[57186]: This is a standalone pdns
Jul 01 11:08:05 srv5976184519 pdns_server[57186]: Listening on controlsocket in '/run/pdns/pdns.controlsocket'
Jul 01 11:08:05 srv5976184519 pdns_server[57186]: WARNING: MYSQL_OPT_RECONNECT is deprecated and will be removed i>
Jul 01 11:08:05 srv5976184519 pdns_server[57186]: Unable to bind UDP socket to '0.0.0.0:53': Address already in use
Jul 01 11:08:05 srv5976184519 pdns_server[57186]: Fatal error: Unable to bind to UDP socket
Jul 01 11:08:05 srv5976184519 systemd[1]: pdns.service: Main process exited, code=exited, status=1/FAILURE
Jul 01 11:08:05 srv5976184519 systemd[1]: pdns.service: Failed with result 'exit-code'.
Jul 01 11:08:05 srv5976184519 systemd[1]: Failed to start PowerDNS Authoritative Server.
Jul 01 11:08:06 srv5976184519 systemd[1]: pdns.service: Scheduled restart job, restart counter is at 443.
Jul 01 11:08:06 srv5976184519 systemd[1]: Stopped PowerDNS Authoritative Server.
Jul 01 11:08:06 srv5976184519 systemd[1]: Starting PowerDNS Authoritative Server...
Jul 01 11:08:06 srv5976184519 pdns_server[57189]: Loading '/usr/lib/x86_64-linux-gnu/pdns/libgmysqlbackend.so'
Jul 01 11:08:06 srv5976184519 pdns_server[57189]: This is a standalone pdns
Jul 01 11:08:06 srv5976184519 pdns_server[57189]: Listening on controlsocket in '/run/pdns/pdns.controlsocket'
Jul 01 11:08:06 srv5976184519 pdns_server[57189]: WARNING: MYSQL_OPT_RECONNECT is deprecated and will be removed i>
Jul 01 11:08:06 srv5976184519 pdns_server[57189]: Unable to bind UDP socket to '0.0.0.0:53': Address already in use
Jul 01 11:08:06 srv5976184519 pdns_server[57189]: Fatal error: Unable to bind to UDP socket
Jul 01 11:08:06 srv5976184519 systemd[1]: pdns.service: Main process exited, code=exited, status=1/FAILURE
Jul 01 11:08:06 srv5976184519 systemd[1]: pdns.service: Failed with result 'exit-code'.
Jul 01 11:08:06 srv5976184519 systemd[1]: Failed to start PowerDNS Authoritative Server.
Jul 01 11:08:07 srv5976184519 systemd[1]: pdns.service: Scheduled restart job, restart counter is at 444.
Jul 01 11:08:07 srv5976184519 systemd[1]: Stopped PowerDNS Authoritative Server.
Jul 01 11:08:07 srv5976184519 systemd[1]: Starting PowerDNS Authoritative Server...
Jul 01 11:08:08 srv5976184519 pdns_server[57192]: Loading '/usr/lib/x86_64-linux-gnu/pdns/libgmysqlbackend.so'
Jul 01 11:08:08 srv5976184519 pdns_server[57192]: This is a standalone pdns
Jul 01 11:08:08 srv5976184519 pdns_server[57192]: Listening on controlsocket in '/run/pdns/pdns.controlsocket'
Jul 01 11:08:08 srv5976184519 pdns_server[57192]: WARNING: MYSQL_OPT_RECONNECT is deprecated and will be removed i>
Jul 01 11:08:08 srv5976184519 pdns_server[57192]: Unable to bind UDP socket to '0.0.0.0:53': Address already in use
Jul 01 11:08:08 srv5976184519 pdns_server[57192]: Fatal error: Unable to bind to UDP socket
Jul 01 11:08:08 srv5976184519 systemd[1]: pdns.service: Main process exited, code=exited, status=1/FAILURE
Jul 01 11:08:08 srv5976184519 systemd[1]: pdns.service: Failed with result 'exit-code'.
lines 1-34

# sudo netstat -tuln | grep :53
tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN
udp        0      0 127.0.0.53:53           0.0.0.0:*

usmannasir · July 1, 2025, 8:27am

I see the issue now - port 53 is already in use by systemd-resolved (127.0.0.53). This is preventing PowerDNS from starting.

Quick Fix:

Disable systemd-resolved (Recommended for DNS servers)

Stop and disable systemd-resolved

sudo systemctl stop systemd-resolved
sudo systemctl disable systemd-resolved

Remove the symlink

sudo rm /etc/resolv.conf

Create a new resolv.conf

sudo echo “nameserver 8.8.8.8” > /etc/resolv.conf
sudo echo “nameserver 8.8.4.4” >> /etc/resolv.conf

Start PowerDNS

sudo systemctl start pdns

Verify the Fix

Check if port 53 is now free

sudo netstat -tlnp | grep :53

Check PowerDNS status

sudo systemctl status pdns

Test DNS resolution

dig @localhost example.com

Why This Happened After Update

Some system updates re-enable systemd-resolved, which conflicts with PowerDNS. CyberPanel’s installer usually disables it, but system updates can revert this change.

Permanent Solution

Add this to prevent systemd-resolved from starting:

Mask the service permanently

sudo systemctl mask systemd-resolved

Try the first solution - disabling systemd-resolved should immediately resolve your issue since PowerDNS needs port 53 to function as your DNS server.

adkomodir · July 1, 2025, 8:58am

yes. that was the problem and with your help it’s solved now. thank you so much.

and the new panel design is so beautiful. thank you again.

system · July 1, 2025, 11:58am

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