hash with sick backends

varnishtest "hash director with sick backend"

server s1 -repeat 2 {
        rxreq
        expect req.url == "/s1"
        expect req.http.Host == "host2"
        txresp -hdr "Server: s1" -body "server1"
} -start

server s2  {
        rxreq
        expect req.url == "/s1"
        expect req.http.Host == "host1"
        txresp -hdr "Server: s2" -body "server2"
} -start

varnish v1 -vcl+backend {
        import directors;

        sub vcl_init {
                new vd = directors.hash();
                vd.add_backend(s1,1);
                vd.add_backend(s2,1);
        }

        sub vcl_recv {
                set req.backend_hint = vd.backend(client.ip);
        }

} -start

varnish v1 -cliok "backend.set_health s1 sick"

client c1 {
        txreq -url /s1 -hdr "Host: host1"
        rxresp
        # il server 1 è sick perciò il response deve arrivare dal server 2
        expect resp.body == "server2"
} -run

varnish v1 -cliok "backend.set_health s1 healthy"

client c2 {
        txreq -url /s1 -hdr "Host: host2"
        rxresp
        # il server 1 è tornato healthy ed ora il response arriva da s1
        expect resp.body == "server1"
} -run