Master Load Balancing with HAProxy

Bring up a HAProxy environment using a vagrant file to spin up a proxy and two Apache backends, with provisioning scripts to configure the VMs.

Configure HAProxy with a frontend and backend, set the listen IP and port, and use round-robin to balance traffic between two servers.

Learn how default backend and use backend work, how access lists create catch-all rules to forward traffic to web servers, and when to reload versus restart HAProxy.

Explore when to use tcp mode versus http mode in HAProxy, with a hands-on demo configuring frontends and backends, port choices, and a round-robin test.

Explore advanced HAProxy logging, including front-end and backend logs with local0, sampling, and silent options, plus capturing headers and user agents.

Explore axis list based access control in HAProxy. Learn to set path and query string, rewrite requests, and route to backends based on path, domain, and query parameters.

Learn to configure a simple HAProxy with two back-end servers, route traffic on port 80, and diagnose data isolation and login issues caused by separate databases.

Practice acl concepts in lab 1 by replicating example files to configure access lists, path matching, and backends, then test deny and permit rules with a proxy and logs.

Explore how HAProxy performs tcp-based and http-based health checks, tune fall and rise thresholds, and manage backends with track, primary, and backup servers.

Learn to manage ssl re-encryption between express and a proxy by handling private keys, passphrases, and certificates, including creating csrs, removing passphrases, and configuring ssl verify in proxy.

Configure HAProxy to use ssl passthrough, forwarding encrypted traffic to backends without terminating ssl, and require ssl on backend servers using tcp rather than http.