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Re: What happens when PostgreSQL fails to log to SYSLOG

From: "Arnold, Sandra" <ArnoldS(at)osti(dot)gov>
To: "'Joshua D(dot) Drake'" <jd(at)commandprompt(dot)com>
Cc: "pgsql-admin(at)postgresql(dot)org" <pgsql-admin(at)postgresql(dot)org>
Subject: Re: What happens when PostgreSQL fails to log to SYSLOG
Date: 2012-07-11 17:47:56
Message-ID: 54E5385D47A89542BC678F5426799F3905261D4259@OSTIEX01.osti.gov (view raw or flat)
Thread:
Lists: pgsql-admin
Tablelog would be ok for keeping up with transactions for tables.  However, we also need to audit who connects successfully and unsuccessfully.  As far as I am aware, if a user fails to log in successfully, say three times, PostgreSQL is not able to lock the account for 9.0.  Is this the case for 9.1 as well?  This is the version that I will be installing that I am writing the Security controls for.  There are several events that I have to Audit and table transactions are just a small part of it.  The events I need to audit are listed below:

- Unauthorized User Access
- Changes to User Privileges
- Changes to Audit Policy
- Reset User Password
- New User created in Database
- Users dropped from Database
- Invalid Login Attempts

Sandra Arnold
Senior Database Administrator
Contractor to DOE/OSTI
Information International Associates (IIA)



-----Original Message-----
From: Joshua D. Drake [mailto:jd(at)commandprompt(dot)com] 
Sent: Tuesday, July 10, 2012 4:31 PM
To: Arnold, Sandra
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: [ADMIN] What happens when PostgreSQL fails to log to SYSLOG


On 07/10/2012 01:08 PM, Arnold, Sandra wrote:
> I am trying to find out what PostgreSQL does when it cannot write to 
> its SYSLOG file, whether it is permissions or the file system where 
> the log resides is full is the problem.

PostgreSQL doesn't write to a SYSLOG file. It sends it to the syslog daemon. (if you are indeed using syslog)

> Does PostgreSQL stall, does it rollback the transaction it cannot log 
> to the SYSLOG, or does it continue on as if there is not an issue?

This is a non-issue in terms of transactions and operations.


> I am writing Security controls and since I am using the SYSLOG for 
> auditing purposes and I need to document what happens in case there 
> was a failure in writing to the SYSLOG.  For instance, Oracle 
> rollbacks any transactions that are being audited it cannot write to 
> its audit logs.  Just want to know what PostgreSQL does.
>

You should probably look at tablelog for auditing. It automates it. 
Syslog is not really a good way to handle that.

Sincerely,

Joshua D. Drake


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Subject: Re: What happens when PostgreSQL fails to log to SYSLOG
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