§2024-06-05

¶ ask chatGPT

my /etc/haproxy/haproxy.cfg has

global
	log /dev/log	local0
	log /dev/log	local1 notice
	...

How to setup using syslog-ng???

To set up HAProxy logging using syslog-ng, you need to configure both the haproxy.cfg file and the syslog-ng configuration file. Below are the steps to achieve this:

Step 1: Configure HAProxy

Ensure your /etc/haproxy/haproxy.cfg has the correct log directives. It looks like you already have the following configuration in place:

global
	log /dev/log local0
	log /dev/log local1 notice
	...

Step 2: Install syslog-ng

If syslog-ng is not already installed on your system, you can install it using your package manager. For example, on a Debian-based system, you can use:

sudo apt-get update
sudo apt-get install syslog-ng

Step 3: Configure syslog-ng

Edit the syslog-ng configuration file (usually located at /etc/syslog-ng/syslog-ng.conf or /etc/syslog-ng/conf.d/haproxy.conf). Below is an example configuration for syslog-ng to handle HAProxy logs:

Source Configuration: Define a source to listen for log messages from /dev/log.

source s_local {
    unix-stream("/dev/log");
};

Destination Configuration: Define destinations for the log messages. For example, you can separate logs based on their facility (local0 and local1 in this case).

plaintext
Copy code
destination d_haproxy_local0 {
    file("/var/log/haproxy-local0.log");
};

destination d_haproxy_local1 {
    file("/var/log/haproxy-local1.log");
};
Log Configuration: Define log paths to connect sources to destinations based on the log facility.

plaintext
Copy code
log {
    source(s_local);
    filter(f_local0);
    destination(d_haproxy_local0);
};

log {
    source(s_local);
    filter(f_local1);
    destination(d_haproxy_local1);
};
Filter Configuration: Define filters to match specific log facilities.

plaintext
Copy code
filter f_local0 {
    facility(local0);
};

filter f_local1 {
    facility(local1);
};
Step 4: Restart syslog-ng and HAProxy
After updating the syslog-ng configuration file, restart syslog-ng to apply the changes:

bash
Copy code
sudo systemctl restart syslog-ng
Also, restart HAProxy to ensure it is sending logs to syslog:

bash
Copy code
sudo systemctl restart haproxy
Step 5: Verify Log Files
Check the log files to ensure they are being populated correctly. For example:

bash
Copy code
tail -f /var/log/haproxy-local0.log
tail -f /var/log/haproxy-local1.log
This setup ensures that HAProxy logs are directed to the appropriate log files via syslog-ng. Adjust the file paths and facilities as needed for your specific requirements.