Configuring Munin To Monitor Nginx Ubuntu LTS

Munin forum
1

Hi,

I’m having 2 servers:

Server1: Munin running on Apache.
Server2: Nginx, Varnish and Apache.

I would like Munin (server1) to monitor Apache and Nginx. I have the node installed and Munin is reading some default graphs from server2. I just had no luck installing Nginx plugin. Any detailed help please?

2

What kind of problem(s) are you having with the nginx plugin. Which of the plugins are you using?

3

Thanks for the response Evert! I have been struggling a lot!

NginX graphs are not showing at all. On that server, I have Varnish on port 80, then traffic is going to NginX on port 81, then traffic goes to Apache on port 8080. Only Varnish graphs are displayed on Munin. I guess I should update Munin to monitor ports 8080 and 81?

4

If you’re running nginx on a non-standard port, you do have to pass that port on to munin. The recommended way is via /etc/munin/munin-node.conf , but I usually just ‘hack’ the plugins.

Find occurances of

and replace them with

5

Maybe this is why graphs are not showing any data?

6

So you have graphs, but they flatline? Yup, this could be the reason.

7

Which plugin are you using? nginx_combined ? nginx_status? some other plugin?

8

Here is the list of plugins in the /etc/munin/plugins folder:
cpu | iostat_ios | threads | df | irqstats | uptime | df_inode | load | varnish_backend_traffic | diskstats
memory | varnish_expunge | entropy | nginx_memory | varnish_hit_rate | forks | nginx_request
varnish_memory_usage | fw_conntrack | nginx_status | varnish_objects | fw_forwarded_local | nginx_traffic
varnish_request_rate | fw_packets | open_files | varnish_threads | if_err_eth0 | open_inodes | varnish_transfer_rates
if_eth0 | processes | varnish_uptime | interrupts | proc_pri | vmstat | iostat | swap

Attached is how the graph looking like.

9

It is working now. Only the plugin nginx_traffic is not working. The graph does not show on Munin monitoring page.

10

The recommended way is via /etc/munin/munin-node.conf , but I usually just ‘hack’ the plugins.

11

Instead of “hack”, just add on /etc/munin/plugin-conf.d/munin-node

[nginx*]
env.url http://localhost:81/nginx_status

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