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[MINOR] Capture & display more data from health checks, v2

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Capture & display more data from health checks, like
strerror(errno) for L4 failed checks or a first line
from a response for L7 successes/failed checks.

Non ascii or control characters are masked with
chunk_htmlencode() (html stats) or chunk_asciiencode() (logs).
This commit is contained in:
Krzysztof Piotr Oledzki 2009-10-10 21:06:49 +02:00 committed by Willy Tarreau
parent ba8d7d3916
commit f7089f5852
4 changed files with 80 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/common/defaults.h
View File

@ -174,4 +174,9 @@
#define MAX_HOSTNAME_LEN 32
#endif
/* Maximum health check description length */
#ifndef HCHK_DESC_LEN
#define HCHK_DESC_LEN 128
#endif
#endif /* _COMMON_DEFAULTS_H */

1
include/types/server.h
View File

@ -139,6 +139,7 @@ struct server {
struct timeval check_start; /* last health check start time */
unsigned long check_duration; /* time in ms took to finish last health check */
short check_status, check_code; /* check result, check code */
char check_desc[HCHK_DESC_LEN]; /* healt check descritpion */
struct freq_ctr sess_per_sec; /* sessions per second on this server */
int puid; /* proxy-unique server ID, used for SNMP */

86
src/checks.c
View File

@ -125,6 +125,17 @@ static void server_status_printf(struct chunk *msg, struct server *s, unsigned o
if (s->check_status >= HCHK_STATUS_L57DATA)
chunk_printf(msg, ", code: %d", s->check_code);
if (*s->check_desc) {
struct chunk src;
chunk_printf(msg, ", info: \"");
chunk_initlen(&src, s->check_desc, 0, strlen(s->check_desc));
chunk_asciiencode(msg, &src, '"');
chunk_printf(msg, "\"");
}
chunk_printf(msg, ", check duration: %lums", s->check_duration);
}
@ -151,12 +162,13 @@ static void server_status_printf(struct chunk *msg, struct server *s, unsigned o
* Show information in logs about failed health check if server is UP
* or succeeded health checks if server is DOWN.
*/
static void set_server_check_status(struct server *s, short status) {
static void set_server_check_status(struct server *s, short status, char *desc) {
struct chunk msg;
if (status == HCHK_STATUS_START) {
s->result = SRV_CHK_UNKNOWN; /* no result yet */
s->check_desc[0] = '\0';
s->check_start = now;
return;
}
@ -164,6 +176,12 @@ static void set_server_check_status(struct server *s, short status) {
if (!s->check_status)
return;
if (desc && *desc) {
strncpy(s->check_desc, desc, HCHK_DESC_LEN-1);
s->check_desc[HCHK_DESC_LEN-1] = '\0';
} else
s->check_desc[0] = '\0';
s->check_status = status;
if (check_statuses[status].result)
s->result |= check_statuses[status].result;
@ -503,7 +521,7 @@ static int event_srv_chk_w(int fd)
//fprintf(stderr, "event_srv_chk_w, state=%ld\n", unlikely(fdtab[fd].state));
if (unlikely(fdtab[fd].state == FD_STERROR || (fdtab[fd].ev & FD_POLL_ERR))) {
set_server_check_status(s, HCHK_STATUS_L4CON);
set_server_check_status(s, HCHK_STATUS_L4CON, strerror(errno));
goto out_error;
}
@ -539,11 +557,11 @@ static int event_srv_chk_w(int fd)
switch (errno) {
case ECONNREFUSED:
case ENETUNREACH:
set_server_check_status(s, HCHK_STATUS_L4CON);
set_server_check_status(s, HCHK_STATUS_L4CON, strerror(errno));
break;
default:
set_server_check_status(s, HCHK_STATUS_SOCKERR);
set_server_check_status(s, HCHK_STATUS_SOCKERR, strerror(errno));
}
goto out_error;
@ -572,12 +590,12 @@ static int event_srv_chk_w(int fd)
goto out_poll;
if (errno && errno != EISCONN) {
set_server_check_status(s, HCHK_STATUS_L4CON);
set_server_check_status(s, HCHK_STATUS_L4CON, strerror(errno));
goto out_error;
}
/* good TCP connection is enough */
set_server_check_status(s, HCHK_STATUS_L4OK);
set_server_check_status(s, HCHK_STATUS_L4OK, NULL);
goto out_wakeup;
}
}
@ -621,6 +639,7 @@ static int event_srv_chk_r(int fd)
struct task *t = fdtab[fd].owner;
struct server *s = t->context;
int skerr;
char *desc;
socklen_t lskerr = sizeof(skerr);
len = -1;
@ -633,7 +652,7 @@ static int event_srv_chk_r(int fd)
/* in case of TCP only, this tells us if the connection failed */
if (!(s->result & SRV_CHK_ERROR))
set_server_check_status(s, HCHK_STATUS_SOCKERR);
set_server_check_status(s, HCHK_STATUS_SOCKERR, NULL);
goto out_wakeup;
}
@ -649,6 +668,11 @@ static int event_srv_chk_r(int fd)
return 0;
}
if (len < sizeof(trash))
trash[len] = '\0';
else
trash[len-1] = '\0';
/* Note: the response will only be accepted if read at once */
if (s->proxy->options & PR_O_HTTP_CHK) {
/* Check if the server speaks HTTP 1.X */
@ -656,50 +680,62 @@ static int event_srv_chk_r(int fd)
(memcmp(trash, "HTTP/1.", 7) != 0 ||
(trash[12] != ' ' && trash[12] != '\r')) ||
!isdigit(trash[9]) || !isdigit(trash[10]) || !isdigit(trash[11])) {
set_server_check_status(s, HCHK_STATUS_L7RSP);
cut_crlf(trash);
set_server_check_status(s, HCHK_STATUS_L7RSP, trash);
goto out_wakeup;
}
s->check_code = str2uic(&trash[9]);
desc = ltrim(&trash[12], ' ');
cut_crlf(desc);
/* check the reply : HTTP/1.X 2xx and 3xx are OK */
if (trash[9] == '2' || trash[9] == '3')
set_server_check_status(s, HCHK_STATUS_L7OKD);
set_server_check_status(s, HCHK_STATUS_L7OKD, desc);
else if ((s->proxy->options & PR_O_DISABLE404) &&
(s->state & SRV_RUNNING) &&
(s->check_code == 404))
/* 404 may be accepted as "stopping" only if the server was up */
set_server_check_status(s, HCHK_STATUS_L7OKCD);
set_server_check_status(s, HCHK_STATUS_L7OKCD, desc);
else
set_server_check_status(s, HCHK_STATUS_L7STS);
set_server_check_status(s, HCHK_STATUS_L7STS, desc);
}
else if (s->proxy->options & PR_O_SSL3_CHK) {
/* Check for SSLv3 alert or handshake */
if ((len >= 5) && (trash[0] == 0x15 || trash[0] == 0x16))
set_server_check_status(s, HCHK_STATUS_L6OK);
set_server_check_status(s, HCHK_STATUS_L6OK, NULL);
else
set_server_check_status(s, HCHK_STATUS_L6RSP);
set_server_check_status(s, HCHK_STATUS_L6RSP, NULL);
}
else if (s->proxy->options & PR_O_SMTP_CHK) {
/* Check if the server speaks SMTP */
if ((len < strlen("000\r")) ||
(trash[3] != ' ' && trash[3] != '\r') ||
!isdigit(trash[0]) || !isdigit(trash[1]) || !isdigit(trash[2])) {
set_server_check_status(s, HCHK_STATUS_L7RSP);
cut_crlf(trash);
set_server_check_status(s, HCHK_STATUS_L7RSP, trash);
goto out_wakeup;
}
s->check_code = str2uic(&trash[0]);
desc = ltrim(&trash[3], ' ');
cut_crlf(desc);
/* Check for SMTP code 2xx (should be 250) */
if (trash[0] == '2')
set_server_check_status(s, HCHK_STATUS_L7OKD);
set_server_check_status(s, HCHK_STATUS_L7OKD, desc);
else
set_server_check_status(s, HCHK_STATUS_L7STS);
set_server_check_status(s, HCHK_STATUS_L7STS, desc);
}
else {
/* other checks are valid if the connection succeeded anyway */
set_server_check_status(s, HCHK_STATUS_L4OK);
set_server_check_status(s, HCHK_STATUS_L4OK, NULL);
}
out_wakeup:
@ -749,7 +785,7 @@ struct task *process_chk(struct task *t)
}
/* we'll initiate a new check */
set_server_check_status(s, HCHK_STATUS_START);
set_server_check_status(s, HCHK_STATUS_START, NULL);
if ((fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) != -1) {
if ((fd < global.maxsock) &&
(fcntl(fd, F_SETFL, O_NONBLOCK) != -1) &&
@ -824,7 +860,7 @@ struct task *process_chk(struct task *t)
}
if (ret) {
set_server_check_status(s, HCHK_STATUS_SOCKERR);
set_server_check_status(s, HCHK_STATUS_SOCKERR, NULL);
switch (ret) {
case 1:
Alert("Cannot bind to source address before connect() for server %s/%s. Aborting.\n",
@ -855,7 +891,7 @@ struct task *process_chk(struct task *t)
#endif
ret = tcpv4_bind_socket(fd, flags, &s->proxy->source_addr, remote);
if (ret) {
set_server_check_status(s, HCHK_STATUS_SOCKERR);
set_server_check_status(s, HCHK_STATUS_SOCKERR, NULL);
switch (ret) {
case 1:
Alert("Cannot bind to source address before connect() for %s '%s'. Aborting.\n",
@ -918,11 +954,11 @@ struct task *process_chk(struct task *t)
/* FIXME: is it possible to get ECONNREFUSED/ENETUNREACH with O_NONBLOCK? */
case ECONNREFUSED:
case ENETUNREACH:
set_server_check_status(s, HCHK_STATUS_L4CON);
set_server_check_status(s, HCHK_STATUS_L4CON, strerror(errno));
break;
default:
set_server_check_status(s, HCHK_STATUS_SOCKERR);
set_server_check_status(s, HCHK_STATUS_SOCKERR, strerror(errno));
}
}
}
@ -1020,12 +1056,12 @@ struct task *process_chk(struct task *t)
else if ((s->result & SRV_CHK_ERROR) || tick_is_expired(t->expire, now_ms)) {
if (!(s->result & SRV_CHK_ERROR)) {
if (!EV_FD_ISSET(fd, DIR_RD)) {
set_server_check_status(s, HCHK_STATUS_L4TOUT);
set_server_check_status(s, HCHK_STATUS_L4TOUT, NULL);
} else {
if (s->proxy->options & PR_O_SSL3_CHK)
set_server_check_status(s, HCHK_STATUS_L6TOUT);
set_server_check_status(s, HCHK_STATUS_L6TOUT, NULL);
else /* HTTP, SMTP */
set_server_check_status(s, HCHK_STATUS_L7TOUT);
set_server_check_status(s, HCHK_STATUS_L7TOUT, NULL);
}
}

15
src/dumpstats.c
View File

@ -1500,9 +1500,20 @@ int stats_dump_proxy(struct session *s, struct proxy *px, struct uri_auth *uri)
srv_hlt_st[sv_state],
(svs->state & SRV_RUNNING) ? (svs->health - svs->rise + 1) : (svs->health),
(svs->state & SRV_RUNNING) ? (svs->fall) : (svs->rise));
chunk_printf(&msg, "</td><td title=\"%s",
get_check_status_description(sv->check_status));
if (*sv->check_desc) {
struct chunk src;
chunk_printf(&msg, ": ");
chunk_initlen(&src, sv->check_desc, 0, strlen(sv->check_desc));
chunk_htmlencode(&msg, &src);
}
chunk_printf(&msg, "</td><td title=\"%s\" nowrap> %s%s",
get_check_status_description(sv->check_status),
chunk_printf(&msg, "\" nowrap> %s%s",
tv_iszero(&sv->check_start)?"":"* ",
get_check_status_info(sv->check_status));