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HAProxy - Load balancer
250c19032f
Since their first implementation, dynamic servers are created into maintenance state. This has been done purposely to avoid immediate activation of a newly inserted server. However, this principle is incompatible if "enabled" keyword is used on "add server". The newly created instance will be unreacheable as proxy load-balancing algorithm is not informed of its presence via srv_lb_propagate(). The new server could be unblocked by toggling its state with "disable server" / "enable server" commands, which will trigger srv_lb_propagate() invocation. To avoid this unexpected state, simply forbid "enabled" keyword for dynamic servers. In the long-term, it could be possible to re authorize it but at least this requires to call srv_lb_propagate() on dynamic server creation. This should fix github issue #2497. This patch should not be backported as-is, to avoid breaking dynamic servers API on stable versions. "enabled" should instead be ignored for them. This will be implemented in a dedicated patch on top of 2.9. |
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The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)