Re: [mosquitto-dev] Mosquitto persistence file didn't grows.

[Karl Palsson <karlp@xxxxxxxxxxxx>]

Are you actually sure you have any subscribers that will be
stored? remember, you need.

* clean session false
* stable client id
* subscribe with qos >= 1

Finally, and unrelated, but you almost definitely do _not_ want retry interval down at 20.  


Matteo Fracassetti <matteo.fracassetti@xxxxxxxxxx> wrote:
> Hi, all.
> 
>   I have a mosquitto server deployed in a Docker container. I mounted a 
> volume for logs and persistence file and everythings seems to
> work fine except for the persistence: The mosquitto.db files
> doesn't grows even if I stop any subscriptor which could empty
> queues.
>   Write permissions on db path are fine, if I delete the file 
> mosquitto.db, mosquitto creates it again when started. But
> nothing seems to be written into and when mosquitto logs to
> have written his in-memory database to the file, the
> mosquitto.db was touched and its "last time modified" updated
> accordingly.
>   Any suggestion is strongly appreciated.
> 
> 
> # cat /etc/redhat-release (both container and host)
> CentOS Linux release 7.4.1708 (Core)
> 
> # cat /etc/yum.repos.d/mosquitto.repo
> [home_oojah_mqtt]
> name=mqtt (CentOS_CentOS-7)
> type=rpm-md
> baseurl=http://download.opensuse.org/repositories/home:/oojah:/mqtt/CentOS_CentOS-7/
> gpgcheck=1
> gpgkey=http://download.opensuse.org/repositories/home:/oojah:/mqtt/CentOS_CentOS-7/repodata/repomd.xml.key
> enabled=1
> 
> mosquitto version 1.4.14 (build date 2017-09-14 18:40:30+0000)
> 
> mosquitto config file:
> 
> retry_interval 20
> user mosquitto
> port 1883
> protocol mqtt
> autosave_interval 180
> autosave_on_changes false
> persistence true
> persistence_file mosquitto.db
> persistence_location /var/lib/mosquitto/
> log_dest file /var/log/mosquitto/mosquitto.log
> log_type all
> connection_messages true
> log_timestamp true
> allow_anonymous true
> 
>  From Mosquitto log:
> 
> Fri Feb 9 17:50:41 2018: Saving in-memory database to
> /var/lib/mosquitto/mosquitto.db.
> 
> 
> Mosquitto db file (host side):
> 
> -rw------- 1 systemd-bus-proxy systemd-bus-proxy 39 Feb 9 17:56
> mosquitto-db/_data/mosquitto.db
> 
> Mosquitto db file (from the container):
> 
> # ll /var/lib/mosquitto/mosquitto.db
> 
> -rw------- 1 mosquitto mosquitto 39 Feb  9 16:56 
> /var/lib/mosquitto/mosquitto.db
> 
> 
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