MINOR: stats: report the boot time in "show info"

Just like we have the uptime in "show info", let's add the boot time.
It's trivial to collect as it's just the difference between the ready
date and the start date, and will allow users to monitor this element
in order to take action before it starts becoming problematic. Here
the boot time is reported in milliseconds, so this allows to even
observe sub-second anomalies in startup delays.

diff --git a/include/haproxy/stats-t.h b/include/haproxy/stats-t.h
index 663641615b6aaf9d04f85916fd7ffe44254d3cfe..07eaf6d5027b3e7bee5faf7a91921789b6596f29 100644 (file)
--- a/include/haproxy/stats-t.h
+++ b/include/haproxy/stats-t.h
@@ -345,6 +345,7 @@ enum info_field {
        INF_TAINTED,
        INF_WARNINGS,
        INF_MAXCONN_REACHED,
+       INF_BOOTTIME_MS,
 
        /* must always be the last one */
        INF_TOTAL_FIELDS

diff --git a/src/stats.c b/src/stats.c
index 48eb532e09d1bd84d1cb922dd652f2dbb581d921..68adde6c5810e1019e13554b0ab39cfc68335a76 100644 (file)
--- a/src/stats.c
+++ b/src/stats.c
@@ -158,6 +158,7 @@ const struct name_desc info_fields[INF_TOTAL_FIELDS] = {
        [INF_TAINTED]                        = { .name = "Tainted",                     .desc = "Experimental features used" },
        [INF_WARNINGS]                       = { .name = "TotalWarnings",               .desc = "Total warnings issued" },
        [INF_MAXCONN_REACHED]                = { .name = "MaxconnReached",              .desc = "Number of times an accepted connection resulted in Maxconn being reached" },
+       [INF_BOOTTIME_MS]                    = { .name = "BootTime_ms",                 .desc = "How long ago it took to parse and process the config before being ready (milliseconds)" },
 };
 
 const struct name_desc stat_fields[ST_F_TOTAL_FIELDS] = {
@@ -4630,6 +4631,7 @@ int stats_fill_info(struct field *info, int len, uint flags)
        uint64_t glob_out_bytes, glob_spl_bytes, glob_out_b32;
        uint up_sec, up_usec;
        ullong up;
+       ulong boot;
        int thr;
 
 #ifdef USE_OPENSSL
@@ -4654,6 +4656,8 @@ int stats_fill_info(struct field *info, int len, uint flags)
        up_sec = ns_to_sec(up);
        up_usec = (up / 1000U) % 1000000U;
 
+       boot = tv_ms_remain(&start_date, &ready_date);
+
        if (len < INF_TOTAL_FIELDS)
                return 0;
 
@@ -4748,6 +4752,7 @@ int stats_fill_info(struct field *info, int len, uint flags)
        chunk_appendf(out, "%#x", get_tainted());
        info[INF_WARNINGS]                       = mkf_u32(FN_COUNTER, HA_ATOMIC_LOAD(&tot_warnings));
        info[INF_MAXCONN_REACHED]                = mkf_u32(FN_COUNTER, HA_ATOMIC_LOAD(&maxconn_reached));
+       info[INF_BOOTTIME_MS]                    = mkf_u32(FN_DURATION, boot);
 
        return 1;
 }