Install Mosquitto MQTT on Synology NAS Server

Install Mosquitto MQTT on Synology NAS Server.txt

From https://synocommunity.com add http://packages.synocommunity.com to your NAS package sources.
For that, go to NAS->Package Cnter->Click Settings->Package Sources tab.
Then from the community, you can see Mosquitto. Install it. 
After installing, please stop the Mosquitto service before updating configuration. You can start service after changes.
Enable Admin login for Synology
Enable SSH in NAS
Download putty and connect to NAS Server
Login using admin 
Change to root user [sudo -i, {use admin password}]
Find mosquitto.conf file [find / -name mosquitto.conf]
Go to that path using cd [in my case cd /volume1/@appstore/mosquitto/var]
Edit mosquitto.conf [vi mosquitto.conf]
Might say it's used by another process. Force edit. 
Scroll down and find # allow_anonymous [around line 513]
Remove # and make [allow_anonymous false] [Use insert on keyboard to edit]
Scroll and find #password_file [around line 555]
Remove # and make password_file /volume1/@appstore/mosquitto/var/password_file [where 2nd password_file is the actual filename]
Save the file [Esc-> :wq to save]
Now create a file password_file in /volume1/@appstore/mosquitto/var/
Ensure your are still in same directory, type vi password_file 
This will create new file, press insert and type your username and password in below format
username:password [Username should not contain :]. You can add multiple users line by line 
Save file and clseo [Esc->:wq]
Find mosquitto_passwd [find / -name mosquitto_passwd]
Stay in the mosquitto.conf folder itself. Because we have password_file file here.
From mosquitto.conf folder, type mosquitto_passwd [along with path] -U password_file to encrypt password. 
In my case /volume1/@appstore/mosquitto/bin/mosquitto_passwd -U password_file
Start/restart Mosquitto Server
All done. Thank You.

Thank you,
very good description.

Hi do you know if this broker retains mqtt messages somewhere? The mosquitto base documentation points to a mosquitto.db file that would need to be deleted but this doesn't seem to exist on the synology package.
Thanks

It doesn't retain anything. Once the messages are delivered they are gone. send from mobile... On Sat, Aug 31, 2019 at 11:27 AM +0200, "ceraz68" <notifications@github.com> wrote: Hi do you know if this broker retains mqtt messages somewhere? The mosquitto base documentation points to a mosquitto.db file that would need to be deleted but this doesn't seem to exist on the synology package. Thanks — You are receiving this because you commented. Reply to this email directly, view it on GitHub, or mute the thread.

Hi do you know if this broker retains mqtt messages somewhere?

if the retain flag is set mqtt keeps the last message received, if there are subscribers to topic. see here
http://www.steves-internet-guide.com/mqtt-retained-messages-example/

mosquito.db is used only if you enabled persistence to preserve in-memory db state after restart

thank you so much!

hello. i have installed the eclipse-mosquitto image from within synology docker. image runs ok with no errors and i see the port in the details says 1883. however, when I went over to my NAS IP:1883, it does not show up the MQTT page. Any help?

Hi,
Thank you for the description!

In general mosquitto 1.4.14-9 is working on my DS218+, but I couldn't find a way to enable the logging. I added in mosquitto.conf:

log_type all
log_dest /volume1/public/mosquitto-log/running.log

I tried it with different locations for log_dest, but the result in moquitto.log is always

Starting mosquitto command /volume1/@appstore/mosquitto/sbin/mosquitto -d -c /volume1/@appstore/mosquitto/var/mosquitto.conf
Error: Invalid log_dest value (/volume1/public/mosquitto-log/running.log).
Error found at /volume1/@appstore/mosquitto/var/mosquitto.conf:465.
Error: Unable to open configuration file.

I assume mosquitto has no write permissions but I don't know how to solve it.
Do you have an idea?
Thank you.