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BUG/MEDIUM: stats: show backend may show an empty or incomplete result 

This is the same issue as "show servers state", where the result is incorrect
it the data can't fit in one buffer. The similar fix is applied, to restart
the data processing where it stopped as buffers are sent to the client.

This fix should be backported to haproxy 1.6
This commit is contained in:
Cyril Bont 2016-05-06 12:18:49 +02:00 committed by Willy Tarreau
parent 76a99784f4
commit 6ca9e01ab2
2 changed files with 21 additions and 7 deletions
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3
include/types/applet.h
View File

@ -135,6 +135,9 @@ struct appctx {
struct proxy *px; /* current proxy being dumped, NULL = not started yet. */
struct server *sv; /* current server being dumped, NULL = not started yet. */
} server_state;
struct {
struct proxy *px; /* current proxy being dumped, NULL = not started yet. */
} be; /* used by "show backends" command */
struct {
char **var;
} env;

25
src/dumpstats.c
View File

@ -1304,6 +1304,7 @@ static int stats_sock_parse_request(struct stream_interface *si, char *line)
appctx->ctx.stats.flags = 0;
if (strcmp(args[0], "show") == 0) {
if (strcmp(args[1], "backend") == 0) {
appctx->ctx.be.px = NULL;
appctx->st2 = STAT_ST_INIT;
appctx->st0 = STAT_CLI_O_BACKEND;
}
@ -3117,13 +3118,24 @@ static int dump_servers_state(struct stream_interface *si, struct chunk *buf)
/* Parses backend list and simply report backend names */
static int stats_dump_backend_to_buffer(struct stream_interface *si)
{
struct appctx *appctx = __objt_appctx(si->end);
extern struct proxy *proxy;
struct proxy *curproxy;
chunk_reset(&trash);
chunk_printf(&trash, "# name\n");
for (curproxy = proxy; curproxy != NULL; curproxy = curproxy->next) {
if (!appctx->ctx.be.px) {
chunk_printf(&trash, "# name\n");
if (bi_putchk(si_ic(si), &trash) == -1) {
si_applet_cant_put(si);
return 0;
}
appctx->ctx.be.px = proxy;
}
for (; appctx->ctx.be.px != NULL; appctx->ctx.be.px = curproxy->next) {
curproxy = appctx->ctx.be.px;
/* looking for backends only */
if (!(curproxy->cap & PR_CAP_BE))
continue;
@ -3133,11 +3145,10 @@ static int stats_dump_backend_to_buffer(struct stream_interface *si)
continue;
chunk_appendf(&trash, "%s\n", curproxy->id);
}
if (bi_putchk(si_ic(si), &trash) == -1) {
si_applet_cant_put(si);
return 0;
if (bi_putchk(si_ic(si), &trash) == -1) {
si_applet_cant_put(si);
return 0;
}
}
return 1;