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cheatsheet-tldr/tldr/haproxy
2026-03-20 00:28:18 +00:00

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---
syntax: markdown
tags: [tldr, common]
source: https://github.com/tldr-pages/tldr.git
---
# haproxy
> Fast and reliable HTTP reverse proxy and load balancer.
> More information: <https://manned.org/haproxy>.
- Check configuration file for validity:
`haproxy -c -f {{path/to/haproxy.cfg}}`
- Start HAProxy with a configuration file:
`haproxy -f {{path/to/haproxy.cfg}}`
- Start in daemon mode:
`haproxy -D -f {{path/to/haproxy.cfg}}`
- Start in master-worker mode:
`haproxy -W -f {{path/to/haproxy.cfg}}`
- Start with debugging mode enabled (foreground, verbose output):
`haproxy -d -f {{path/to/haproxy.cfg}}`
- Reload configuration with graceful shutdown of old process:
`haproxy -f {{path/to/haproxy.cfg}} -sf {{pid}}`
- Set maximum number of simultaneous connections:
`haproxy -f {{path/to/haproxy.cfg}} -n {{maxconn}}`
- Reload with zero downtime by reusing sockets from old process:
`haproxy -f {{path/to/haproxy.cfg}} -x {{path/to/haproxy.sock}} -sf {{pid}}`