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Re: [mosquitto-dev] Unable to start mosquitto - problem with password file
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Shan
Thanks. But the UID and GID values will differ between machines,
won't they? In my machine, mosquitto has a uid = 128 and gid =
139. So 'chown mosquitto:mosquitto -R /etc/mosquitto/' should work
across machines? (I was thinking the '1883' value might be
connected to the insecure MQTT port and some obscure use of chown
😕.)
Useful - see my slightly earlier post. I managed to get the
service to start by granting world read access to the passwd file.
Since the world will include the mosquitto user, I think I have
stumbled on the same solution via circuitous route. Running 'sudo
chown :mosquitto passwd' also works so it seems only group
access is required, not ownership of the file by the mosquitto
user?
I cannot find any mention of any of this stuff in the docs!
Best,
P.
On 31/10/2023 14:21, Shan D wrote:
Hi Peter,
In a nutshell, I updated my container to 2.0.18 and obtained
some warnings from the broker about file permissions and
ownerships. I took the warnings and adapted my existing
mosquitto configuration accordingly.
Hope this helps
Shan
Shan
Thanks for this.
What issues do these commands actually fix?
(My /etc/mosquitto/passwd file, as generated by
mosquitto_password, currently has owner read & write
access.)
Unclear about the form of the chown command. What is the
"1883" value? My reading of the man page is that these
values should either be UID and GID values, or user names
as aliases for these. My /etc/mosquitto/passwd file is
currently owned by root, which seems right to me for a
file that will be accessed by a process executed by
systemd. Or maybe I am misunderstanding?
Some problem with file access rights (as opposed to
existence) seems a good call. But I cannot see anywhere in
the docs what these need to be.
Best,
P.
On 30/10/2023 19:54, Shan D wrote:
Hi Peter,
yes the forwards compatibility from
2.0.18 is not very intuitive. I suggest trying to do:
```
sudo chmod 0400 -R /etc/mosquitto/
&& sudo chown 1883:1883 -R /etc/mosquitto/
```
I faced the same issue when setting up
my mosquitto container.
regards,
shan
Having
successfully used mosquitto a few years ago, I am
trying to
install it on a couple of new machines. I have
downloaded the latest
version from the PPA. All works fine on install.
My problems come when I try to modify the default conf
file. Mosquitto
fails to (re)start with an exit code of 13, which I
have run down to the
mosquitto log file entries of:
mosquitto version 2.0.18 starting
Config loaded from /etc/mosquitto/mosquitto.conf.
Error: Unable to open pwfile "/etc/mosquitto/passwd".
Error opening password file "/etc/mosquitto/passwd".
I am generating the password file using the
mosquitto_password utility,
which exits with a zero error code; in fact, I am
using the example in
the docs. The password file looks sensible with the
contents of:
username + ":" + a hashed password. I have even
checked the file has
root R/W access.
Convinced I have not made a dumb mistake in mistyping
the pathname - I
have cut-and-pasted the results of "ls
/etc/mosquitto/passwd" directly
into the conf file. Also run it past colleagues who
can't seen any typos.
The actual conf file I am using is:
persistence true
persistence_location /var/lib/mosquitto/
log_dest file /var/log/mosquitto/mosquitto.log
connection_messages true
allow_anonymous false
password_file /etc/mosquitto/passwd
listener 1883 localhost
Using Mosquitto 2.0.18 on Linux Mint v21.2
Any ideas? This all worked beautifully for me a few
years ago... 🙁
P.
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