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MINOR: stats: support an optional "float" option to "show info" 

This will allow some fields to be produced with a higher accuracy when
the requester indicates being able to parse floats. Rates and times are
among the elements which can make sense.
This commit is contained in:
Willy Tarreau 2021-05-08 07:54:24 +02:00
parent 0b26b3866c
commit 2745620240
3 changed files with 10 additions and 3 deletions
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8
doc/management.txt
View File

@ -2295,7 +2295,7 @@ show fd [<fd>]
suffixed with an exclamation mark ('!'). This may help find a starting point
when trying to diagnose an incident.
show info [typed|json] [desc]
show info [typed|json] [desc] [float]
Dump info about haproxy status on current process. If "typed" is passed as an
optional argument, field numbers, names and types are emitted as well so that
external monitoring products can easily retrieve, possibly aggregate, then
@ -2306,7 +2306,11 @@ show info [typed|json] [desc]
delimited by a colon (':'). The left one is the field name and the right
one is the value. It is very important to note that in typed output
format, the dump for a single object is contiguous so that there is no
need for a consumer to store everything at once.
need for a consumer to store everything at once. If "float" is passed as an
optional argument, some fields usually emitted as integers may switch to
floats for higher accuracy. It is purposely unspecified which ones are
concerned as this might evolve over time. Using this option implies that the
consumer is able to process floats. The output format used is sprintf("%f").
When using the typed output format, each line is made of 4 columns delimited
by colons (':'). The first column is a dot-delimited series of 3 elements. The

1
include/haproxy/stats-t.h
View File

@ -42,6 +42,7 @@
#define STAT_SHMODULES 0x00002000 /* conf: show modules */
#define STAT_HIDE_MAINT 0x00004000 /* hide maint/disabled servers */
#define STAT_CONVDONE 0x00008000 /* conf: rules conversion done */
#define STAT_USE_FLOAT 0x00010000 /* use floats where possible in the outputs */
#define STAT_BOUND 0x00800000 /* bound statistics to selected proxies/types/services */
#define STAT_STARTED 0x01000000 /* some output has occurred */

4
src/stats.c
View File

@ -4788,6 +4788,8 @@ static int cli_parse_show_info(char **args, char *payload, struct appctx *appctx
appctx->ctx.stats.flags = (appctx->ctx.stats.flags & ~STAT_FMT_MASK) | STAT_FMT_JSON;
else if (strcmp(args[arg], "desc") == 0)
appctx->ctx.stats.flags |= STAT_SHOW_FDESC;
else if (strcmp(args[arg], "float") == 0)
appctx->ctx.stats.flags |= STAT_USE_FLOAT;
arg++;
}
return 0;
@ -5111,7 +5113,7 @@ REGISTER_PER_THREAD_FREE(free_trash_counters);
/* register cli keywords */
static struct cli_kw_list cli_kws = {{ },{
{ { "clear", "counters", NULL }, "clear counters [all] : clear max statistics counters (or all counters)", cli_parse_clear_counters, NULL, NULL },
{ { "show", "info", NULL }, "show info [desc|json|typed]* : report information about the running process", cli_parse_show_info, cli_io_handler_dump_info, NULL },
{ { "show", "info", NULL }, "show info [desc|json|typed|float]* : report information about the running process", cli_parse_show_info, cli_io_handler_dump_info, NULL },
{ { "show", "stat", NULL }, "show stat [desc|json|no-maint|typed|up]*: report counters for each proxy and server", cli_parse_show_stat, cli_io_handler_dump_stat, NULL },
{ { "show", "schema", "json", NULL }, "show schema json : report schema used for stats", NULL, cli_io_handler_dump_json_schema, NULL },
{{},}