About reloading and old connections (before 1.8 and after 1.8)

@dmdevito wrote:

Hi,

Before HAProxy 1.8, I understood the reloading sequence as follows:

• A new HAP instance is launched with new config
• The old HAP instance still runs until long-standing, old connections are closed (+/- when the traffic ends).

OK, it works, but old connections could still be there for a long time. So, during that time, 2 HAP instances are running.

HAProxy 1.8 introduces a new reloading mechanism described in : Truly Seamless Reloads with HAProxy – No More Hacks!

With HAProxy 1.8, I understand the following (after having read the article):

• A new HAP instance is launched with new config
• This new instance gets all sockets and then, all connections from the old instance, while accepting new connections too
• The old HAP instance is able, then, to die quickly (as it has NO need to keep alive for holding old connections).

Is my understanding correct for HAProxy 1.8+ reloading mechanism ?

Thanks.

Dominique

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