My Rpi4 running my home automation recently upgraded itself from mosquitto version 1.6.12 to 2.0.8 and as a consequence it was starting in local only mode.
Done some digging about but still can't get it all working again, mainly used this previous helpful question Mosquitto: Starting in local only mode but my devices still can't connect.
From my mosquiito log I see
1614386087: mosquitto version 2.0.8 starting
1614386087: Config loaded from /etc/mosquitto/mosquitto.conf.
1614386087: Opening ipv4 listen socket on port 1883.
1614386087: Opening ipv6 listen socket on port 1883.
1614386087: mosquitto version 2.0.8 running
The service shows this
:~$ sudo systemctl status mosquitto
* mosquitto.service - Mosquitto MQTT Broker
Loaded: loaded (/lib/systemd/system/mosquitto.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2021-02-27 00:34:47 GMT; 10h ago
Docs: man:mosquitto.conf(5)
man:mosquitto(8)
Process: 375 ExecStartPre=/bin/mkdir -m 740 -p /var/log/mosquitto (code=exited, status=0/SUCCESS)
Process: 398 ExecStartPre=/bin/chown mosquitto: /var/log/mosquitto (code=exited, status=0/SUCCESS)
Process: 404 ExecStartPre=/bin/mkdir -m 740 -p /var/run/mosquitto (code=exited, status=0/SUCCESS)
Process: 411 ExecStartPre=/bin/chown mosquitto: /var/run/mosquitto (code=exited, status=0/SUCCESS)
Main PID: 419 (mosquitto)
Memory: 1.5M
CGroup: /system.slice/mosquitto.service
`-419 /usr/sbin/mosquitto -c /etc/mosquitto/mosquitto.conf
Feb 27 00:34:47 Vero4K systemd[1]: Starting Mosquitto MQTT Broker...
Feb 27 00:34:47 Vero4K mosquitto[419]: 1614386087: Loading config file /etc/mosquitto/conf.d/calz.conf
Feb 27 00:34:47 Vero4K systemd[1]: Started Mosquitto MQTT Broker.
In my calz.conf file I have
listener 1883
allow_anonymous true
But my local version of Domoticz (runs on the same box) shows this in it's logs
Error: Plugin: Connection Exception: 'resolve: Host not found (authoritative)' connecting to '127.0.0.1:1883'
Error: (ShellyMQTT) Failed to connect to: 127.0.0.1:1883, Description: resolve: Host not found (authoritative)
And all my Tasmota devices now show
14:49:38 MQT: Attempting connection...
14:49:38 MQT: Connect failed to 192.168.1.19:1883, rc -2. Retry in 120 sec
I can see the port open as well
sudo netstat -tulpn | grep LISTEN
tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN 361/vsftpd
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 729/sshd
tcp 0 0 0.0.0.0:37015 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:36666 0.0.0.0:* LISTEN 608/kodi.bin
tcp 0 0 0.0.0.0:36667 0.0.0.0:* LISTEN 608/kodi.bin
tcp 0 0 0.0.0.0:1883 0.0.0.0:* LISTEN 375/mosquitto
tcp 0 0 0.0.0.0:49472 0.0.0.0:* LISTEN 763/rpc.statd
tcp 0 0 0.0.0.0:9090 0.0.0.0:* LISTEN 608/kodi.bin
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 1/init
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN 608/kodi.bin
tcp6 0 0 :::22 :::* LISTEN 729/sshd
tcp6 0 0 :::49079 :::* LISTEN 763/rpc.statd
tcp6 0 0 :::36666 :::* LISTEN 608/kodi.bin
tcp6 0 0 :::36667 :::* LISTEN 608/kodi.bin
tcp6 0 0 :::1883 :::* LISTEN 375/mosquitto
tcp6 0 0 :::49919 :::* LISTEN -
tcp6 0 0 :::9090 :::* LISTEN 608/kodi.bin
tcp6 0 0 :::111 :::* LISTEN 1/init
tcp6 0 0 :::8080 :::* LISTEN 608/kodi.bin
/etc/mosquitto/mosquitto.conf
# Place your local configuration in /etc/mosquitto/conf.d/
#
# A full description of the configuration file is at
# /usr/share/doc/mosquitto/examples/mosquitto.conf.example
pid_file /var/run/mosquitto/mosquitto.pid
persistence true
persistence_location /var/lib/mosquitto/
log_dest file /var/log/mosquitto/mosquitto.log
include_dir /etc/mosquitto/conf.d
Any ideas?
Think I sorted it in the end, bizarre combination of things...
Updating Mosquito required the listener port and anonymous part but for some reason my Raspberry Pi on reboot had switch across to an guest network and gained a new IP so nothing was ever going to get to it :(
I realised when the port was listening and couldn't get to it then the same for everything else like kodi, ssh etc. I happened to be on the console for it as it was more convenient at the time, If I had tried to SSH to it that would of failed too.