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MINOR: server: add the srv_queue() sample fetch method

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srv_queue([<backend>/]<server>) : integer
  Returns an integer value corresponding to the number of connections currently
  pending in the designated server's queue. If <backend> is omitted, then the
  server is looked up in the current backend. It can sometimes be used together
  with the "use-server" directive to force to use a known faster server when it
  is not much loaded. See also the "srv_conn", "avg_queue" and "queue" sample
  fetch methods.
This commit is contained in:
Willy Tarreau 2017-10-13 11:46:26 +02:00
parent dce734e10f
commit ff2b7afe0b
2 changed files with 22 additions and 0 deletions
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8
doc/configuration.txt
View File

@ -13373,6 +13373,14 @@ srv_is_up([<backend>/]<server>) : boolean
using dummy servers as boolean variables that can be enabled or disabled from
the CLI, so that rules depending on those ACLs can be tweaked in realtime.
srv_queue([<backend>/]<server>) : integer
Returns an integer value corresponding to the number of connections currently
pending in the designated server's queue. If <backend> is omitted, then the
server is looked up in the current backend. It can sometimes be used together
with the "use-server" directive to force to use a known faster server when it
is not much loaded. See also the "srv_conn", "avg_queue" and "queue" sample
fetch methods.
srv_sess_rate([<backend>/]<server>) : integer
Returns an integer corresponding to the sessions creation rate on the
designated server, in number of new sessions per second. If <backend> is

14
src/backend.c
View File

@ -1798,6 +1798,19 @@ smp_fetch_srv_conn(const struct arg *args, struct sample *smp, const char *kw, v
return 1;
}
/* set temp integer to the number of connections pending in the server's queue.
* Accepts exactly 1 argument. Argument is a server, other types will lead to
* undefined behaviour.
*/
static int
smp_fetch_srv_queue(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
smp->flags = SMP_F_VOL_TEST;
smp->data.type = SMP_T_SINT;
smp->data.u.sint = args->data.srv->nbpend;
return 1;
}
/* set temp integer to the number of enabled servers on the proxy.
* Accepts exactly 1 argument. Argument is a server, other types will lead to
* undefined behaviour.
@ -1845,6 +1858,7 @@ static struct sample_fetch_kw_list smp_kws = {ILH, {
{ "srv_conn", smp_fetch_srv_conn, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
{ "srv_id", smp_fetch_srv_id, 0, NULL, SMP_T_SINT, SMP_USE_SERVR, },
{ "srv_is_up", smp_fetch_srv_is_up, ARG1(1,SRV), NULL, SMP_T_BOOL, SMP_USE_INTRN, },
{ "srv_queue", smp_fetch_srv_queue, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
{ "srv_sess_rate", smp_fetch_srv_sess_rate, ARG1(1,SRV), NULL, SMP_T_SINT, SMP_USE_INTRN, },
{ /* END */ },
}};