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Re: [monit] M/Monit can't connect to host

From: Martin Pala
Subject: Re: [monit] M/Monit can't connect to host
Date: Wed, 23 Jun 2010 15:44:42 +0200

Hello Kristian,

M/Monit caches the whole host entry including credentials to offload the 
database - it is possible to set the credentials using SQL directly, but it 
should be done this way to keep the cache consistent:

1.) stop M/Monit
2.) run sql statements
3.) start M/Monit

Note: on stop M/Monit syncs the cache content to database so if you did the sql 
statement before stopping M/Monit, it will overwrite the entries back to 
correspond to cache content

Best regards,

On Jun 23, 2010, at 3:05 PM, Kristian Van Der Vliet wrote:

> Hi,
> I've recently re-installed our M/Monit instance on a new host and after our 
> approximately 250 host re-registered with M/Monit I've found that M/Monit 
> insists it can not connect to the host: if I select a host on the Status page 
> I get
> "Cannot connect to Monit -- Invalid username or password
> Please check latest events for the host and host configuration."
> O.K, fine, when the host registered itself it naturally left the username & 
> password blank. Given that I have ~250 hosts and don't fancy configuring the 
> passwords via. my web browser for each one, I thought it'd be a nice and easy 
> job to run a quick MySQL query to set the passwords:
> UPDATE `hosts` SET uname="admin",password="<password>";
> except this didn't work. The correct username and password are now set in the 
> database, but M/Monit insists it can't connect to the host. If I bite the 
> bullet and go to the "Edit Host" page, and set the same username and password 
> there, it'll work. However I can't see what M/Monit does that I haven't 
> already done via. the SQL query!
> I'm sure I'm missing something here. Are there any additional fields I need 
> to change or add in the database? Is there some magic incantation I have to 
> perform to get M/Monit to read the username & password that's already in the 
> database?
> Yes I could set the username & password manually, but not for ~250 hosts...
> Any help or suggestions would be appreciated. Thanks in advance.
> -- 
> Kristian Van Der Vliet
> --
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