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HAProxy Maintenance Page
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| # | |
| # Proof of concept for a HAProxy maintenance mode | |
| # | |
| # | |
| # Control the maintenance page during runtime using the stats socket: | |
| # | |
| # To put the whole site in maintenance mode (for all IPs): | |
| # > add acl #0 0.0.0.0/0 | |
| # | |
| # To exclude your own ip, so you are able to test things out: | |
| # > add acl #1 8.8.8.8 | |
| # | |
| # To exit maintenance mode again simply remove the mask from #0 again: | |
| # > del acl #0 0.0.0.0/0 | |
| # | |
| frontend web | |
| bind 0.0.0.0:80 | |
| mode http | |
| default_backend web_backend | |
| # use this in case of real errors | |
| errorfile 503 /etc/haproxy/errors/maintenance.http | |
| # maintenance mode - disabled by default | |
| acl web_maintenance src -- | |
| acl web_maintenence_ex src -- | |
| use_backend web_maintenance if web_maintenance !web_maintenence_ex | |
| backend web | |
| mode http | |
| balance roundrobin | |
| server web01 127.0.0.1:8080 inter 500 rise 3 fall 1 weight 100 slowstart 30s | |
| backend web_maintenence | |
| mode http | |
| errorfile 503 /etc/haproxy/errors/maintenance.http | |
Hi How should I use this?
The idea behind is completing the acl in runtime, so web_maintenance is mapped to ACL #0 and web_maintenence_ex to #1. Given so, once running, by executing the lines shown, you can control the behavior of the acl, thus changing the way haproxy process requests.
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Just saying, there is a typo here, the backend is called "web_maintenEnce", but the use_backend directive references "web_maintenAnce".