Falling back to a disabled pool member, if all others are down?

Hi,

here is an generic iRule approach. Source address persistence is used. Other persistence methods not tested yet:

when LB_FAILED {
    foreach pool_member [members -list [LB::server pool]] {
        if { [LB::status pool [LB::server pool] member [getfield $pool_member " " 1] [getfield $pool_member " " 2]] ne "down" } {
            LB::reselect pool [LB::server pool] member [getfield $pool_member " " 1] [getfield $pool_member " " 2]
        }
    }
}

when PERSIST_DOWN {
    foreach pool_member [members -list [LB::server pool]] {
        if { [LB::status pool [LB::server pool] member [getfield $pool_member " " 1] [getfield $pool_member " " 2]] ne "down" } {
            LB::reselect pool [LB::server pool] member [getfield $pool_member " " 1] [getfield $pool_member " " 2]
        }
    }
}

when LB_SELECTED {
    persist add source_addr [IP::client_addr]
}

Thanks, Stephan