I wanted a simple way to have a dashboard to show if hosts and services are alive & didn’t want to write much code and/or run up a nagios instance (or anything like that). All I care is whether it’s green or red.
I’d already been setting up HAProxy for a proxy forwarder, so I got the idea to turn on the stats page and just have a set of backends which HAProxy would check.
Sample config follows:
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global daemon defaults maxconn 250 timeout connect 5s timeout client 5s timeout server 5s listen stats 0.0.0.0:2001 mode http log global timeout client 50s timeout connect 50s timeout server 50s stats enable stats hide-version stats refresh 30s stats show-node stats uri / stats auth admin:admin backend CheckMe mode tcp server s1 xxx.xxx.xxx.xxx:yy check server s2 xxx.xxx.xxx.xxx:zz check |
Make the file, then if you don’t even feel like installing haproxy, you could do a:
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docker run -d --restart=always -d -p 2001:2001 --name stupid-simple-mon \ -v `pwd`/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro \ haproxy:1.5 |
Point your browser to http://localhost:2001/ and enter user/pass as admin and you’re good to go. It even refreshes every 30 seconds.
