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BUG/MINOR: check: Don't perform any check on servers defined in a frontend

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If a server is defined in a frontend, thus a proxy without the backend
capability, the 'check' and 'agent-check' keywords are ignored. This way, no
check is performed on an ignored server. This avoids a segfault because some
part of the tcpchecks are not fully initialized (or released for frontends
during the post-check).

In addition, an test on the server's proxy capabilities is performed when
checks or agent-checks are initialized and nothing is performed for servers
attached to a non-backend proxy.

This patch should fix the issue #1043. It must be backported as far as 2.2.
This commit is contained in:
Christopher Faulet 2021-01-12 17:29:45 +01:00
parent 22e0d9b39c
commit 6ecd59326f
1 changed files with 14 additions and 2 deletions
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16
src/check.c
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@ -1272,7 +1272,7 @@ static int init_srv_check(struct server *srv)
int ret = ERR_NONE;
int check_type;
if (!srv->do_check)
if (!srv->do_check || !(srv->proxy->cap & PR_CAP_BE))
goto out;
check_type = srv->check.tcpcheck_rules->flags & TCPCHK_RULES_PROTO_CHK;
@ -1397,7 +1397,7 @@ static int init_srv_agent_check(struct server *srv)
const char *err;
int ret = ERR_NONE;
if (!srv->do_agent)
if (!srv->do_agent || !(srv->proxy->cap & PR_CAP_BE))
goto out;
/* If there is no connect rule preceding all send / expect rules, an
@ -1551,6 +1551,12 @@ static int srv_parse_agent_check(char **args, int *cur_arg, struct proxy *curpx,
if (srv->do_agent)
goto out;
if (!(curpx->cap & PR_CAP_BE)) {
memprintf(errmsg, "'%s' ignored because %s '%s' has no backend capability",
args[*cur_arg], proxy_type_str(curpx), curpx->id);
return ERR_WARN;
}
if (!rules) {
rules = calloc(1, sizeof(*rules));
if (!rules) {
@ -1750,6 +1756,12 @@ static int srv_parse_no_agent_check(char **args, int *cur_arg, struct proxy *cur
static int srv_parse_check(char **args, int *cur_arg, struct proxy *curpx, struct server *srv,
char **errmsg)
{
if (!(curpx->cap & PR_CAP_BE)) {
memprintf(errmsg, "'%s' ignored because %s '%s' has no backend capability",
args[*cur_arg], proxy_type_str(curpx), curpx->id);
return ERR_WARN;
}
srv->do_check = 1;
return 0;
}