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MINOR: mux-h2: count open connections/streams on stats

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Implement as a gauge h2 counters for currently open connections and
streams. The counters are decremented when closing the stream or the
connection.
This commit is contained in:
Amaury Denoyelle 2020-10-27 17:16:04 +01:00 committed by Christopher Faulet
parent a8879238ce
commit 66942c1d4d
1 changed files with 22 additions and 0 deletions
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22
src/mux_h2.c
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@ -391,6 +391,9 @@ enum {
H2_ST_RST_STREAM_RESP,
H2_ST_GOAWAY_RESP,
H2_ST_OPEN_CONN,
H2_ST_OPEN_STREAM,
H2_STATS_COUNT /* must be the last member of the enum */
};
@ -414,6 +417,11 @@ static struct name_desc h2_stats[] = {
.desc = "Total number of rst_stream sent on detected error" },
[H2_ST_GOAWAY_RESP] = { .name = "h2_goaway_resp",
.desc = "Total number of goaway sent on detected error" },
[H2_ST_OPEN_CONN] = { .name = "h2_open_connections",
.desc = "Count of currently open connections" },
[H2_ST_OPEN_STREAM] = { .name = "h2_backend_open_streams",
.desc = "Count of currently open streams" },
};
static struct h2_counters {
@ -427,6 +435,9 @@ static struct h2_counters {
long long strm_proto_err; /* total number of protocol errors detected */
long long rst_stream_resp; /* total number of rst_stream frame sent on error */
long long goaway_resp; /* total number of goaway frame sent on error */
long long open_conns; /* count of currently open connections */
long long open_streams; /* count of currently open streams */
} h2_counters;
static void h2_fill_stats(void *data, struct field *stats)
@ -443,6 +454,9 @@ static void h2_fill_stats(void *data, struct field *stats)
stats[H2_ST_STRM_PROTO_ERR] = mkf_u64(FN_COUNTER, counters->strm_proto_err);
stats[H2_ST_RST_STREAM_RESP] = mkf_u64(FN_COUNTER, counters->rst_stream_resp);
stats[H2_ST_GOAWAY_RESP] = mkf_u64(FN_COUNTER, counters->goaway_resp);
stats[H2_ST_OPEN_CONN] = mkf_u64(FN_GAUGE, counters->open_conns);
stats[H2_ST_OPEN_STREAM] = mkf_u64(FN_GAUGE, counters->open_streams);
}
static struct stats_module h2_stats_module = {
@ -974,6 +988,8 @@ static int h2_init(struct connection *conn, struct proxy *prx, struct session *s
goto fail_stream;
}
HA_ATOMIC_ADD(&h2c->px_counters->open_conns, 1);
/* prepare to read something */
h2c_restart_reading(h2c, 1);
TRACE_LEAVE(H2_EV_H2C_NEW, conn);
@ -1055,6 +1071,8 @@ static void h2_release(struct h2c *h2c)
conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events,
&h2c->wait_event);
HA_ATOMIC_SUB(&h2c->px_counters->open_conns, 1);
pool_free(pool_head_h2c, h2c);
}
@ -1333,6 +1351,8 @@ static inline void h2s_close(struct h2s *h2s)
if (!(h2s->cs->flags & CS_FL_EOS) && !b_data(&h2s->rxbuf))
h2s_notify_recv(h2s);
}
HA_ATOMIC_SUB(&h2s->h2c->px_counters->open_streams, 1);
TRACE_LEAVE(H2_EV_H2S_END, h2s->h2c->conn, h2s);
}
h2s->st = H2_SS_CLOSED;
@ -1427,6 +1447,8 @@ static struct h2s *h2s_new(struct h2c *h2c, int id)
h2c->nb_streams++;
h2c->stream_cnt++;
HA_ATOMIC_ADD(&h2c->px_counters->open_streams, 1);
TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
return h2s;
out: