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upstream_check-tengine-2.0.3.patch
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upstream_check-tengine-2.0.3.patch
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diff --git a/src/http/ngx_http_upstream.h b/src/http/ngx_http_upstream.h
index 3102271..4a5ea83 100644
--- a/src/http/ngx_http_upstream.h
+++ b/src/http/ngx_http_upstream.h
@@ -1,4 +1,3 @@
-
/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
@@ -430,6 +429,11 @@ ngx_uint_t ngx_http_upstream_check_peer_down(ngx_uint_t index);
void ngx_http_upstream_check_get_peer(ngx_uint_t index);
void ngx_http_upstream_check_free_peer(ngx_uint_t index);
+ngx_uint_t ngx_http_upstream_check_add_dynamic_peer(ngx_pool_t *pool,
+ ngx_http_upstream_srv_conf_t *us, ngx_addr_t *peer);
+void ngx_http_upstream_check_delete_dynamic_peer(ngx_str_t *name,
+ ngx_addr_t *peer_addr);
+
#endif
extern ngx_module_t ngx_http_upstream_module;
diff --git a/src/http/ngx_http_upstream_check_module.c b/src/http/ngx_http_upstream_check_module.c
index c436b00..3d74759 100644
--- a/src/http/ngx_http_upstream_check_module.c
+++ b/src/http/ngx_http_upstream_check_module.c
@@ -98,6 +98,9 @@ typedef struct {
struct sockaddr *sockaddr;
socklen_t socklen;
+ ngx_int_t ref;
+ ngx_uint_t delete;
+
ngx_atomic_t down;
u_char padding[64];
@@ -108,6 +111,7 @@ typedef struct {
ngx_uint_t generation;
ngx_uint_t checksum;
ngx_uint_t number;
+ ngx_uint_t max_number;
/* ngx_http_upstream_check_status_peer_t */
ngx_http_upstream_check_peer_shm_t peers[1];
@@ -149,6 +153,8 @@ struct ngx_http_upstream_check_peer_s {
ngx_http_upstream_check_peer_shm_t *shm;
ngx_http_upstream_check_srv_conf_t *conf;
+
+ unsigned delete;
};
@@ -156,6 +162,7 @@ typedef struct {
ngx_str_t check_shm_name;
ngx_uint_t checksum;
ngx_array_t peers;
+ ngx_slab_pool_t *shpool;
ngx_http_upstream_check_peers_shm_t *peers_shm;
} ngx_http_upstream_check_peers_t;
@@ -249,6 +256,7 @@ struct ngx_http_upstream_check_srv_conf_s {
ngx_array_t *fastcgi_params;
ngx_uint_t default_down;
+ ngx_uint_t unique;
};
@@ -343,7 +351,27 @@ static ngx_http_fastcgi_request_start_t ngx_http_fastcgi_request_start = {
};
+#define upstream_check_index_invalid(check_ctx, index) \
+ (check_ctx == NULL \
+ || index >= check_ctx->peers_shm->number \
+ || index >= check_ctx->peers_shm->max_number)
+
+
+#define PEER_NORMAL 0x00
+#define PEER_DELETING 0x01
+#define PEER_DELETED 0x02
+
+
+static ngx_uint_t ngx_http_upstream_check_add_dynamic_peer_shm(
+ ngx_pool_t *pool, ngx_http_upstream_check_srv_conf_t *ucscf,
+ ngx_addr_t *peer_addr);
+static void ngx_http_upstream_check_clear_dynamic_peer_shm(
+ ngx_http_upstream_check_peer_shm_t *peer_shm);
+
static ngx_int_t ngx_http_upstream_check_add_timers(ngx_cycle_t *cycle);
+static ngx_int_t ngx_http_upstream_check_add_timer(
+ ngx_http_upstream_check_peer_t *peer, ngx_check_conf_t *check_conf,
+ ngx_msec_t timer, ngx_log_t *log);
static ngx_int_t ngx_http_upstream_check_peek_one_byte(ngx_connection_t *c);
@@ -413,6 +441,8 @@ static void ngx_http_upstream_check_finish_handler(ngx_event_t *event);
static ngx_int_t ngx_http_upstream_check_need_exit();
static void ngx_http_upstream_check_clear_all_events();
+static void ngx_http_upstream_check_clear_peer(
+ ngx_http_upstream_check_peer_t *peer);
static ngx_int_t ngx_http_upstream_check_status_handler(
ngx_http_request_t *r);
@@ -464,11 +494,16 @@ static char *ngx_http_upstream_check_init_main_conf(ngx_conf_t *cf,
static void *ngx_http_upstream_check_create_srv_conf(ngx_conf_t *cf);
static char *ngx_http_upstream_check_init_srv_conf(ngx_conf_t *cf, void *conf);
+static ngx_uint_t ngx_http_upstream_check_unique_peer(
+ ngx_http_upstream_check_peers_t *peers, ngx_addr_t *peer_addr,
+ ngx_http_upstream_check_srv_conf_t *peer_conf);
+
static void *ngx_http_upstream_check_create_loc_conf(ngx_conf_t *cf);
static char * ngx_http_upstream_check_merge_loc_conf(ngx_conf_t *cf,
void *parent, void *child);
-#define SHM_NAME_LEN 256
+#define MAX_DYNAMIC_PEER 4096
+#define SHM_NAME_LEN 256
static char *ngx_http_upstream_check_init_shm(ngx_conf_t *cf, void *conf);
@@ -772,6 +807,7 @@ ngx_uint_t
ngx_http_upstream_check_add_peer(ngx_conf_t *cf,
ngx_http_upstream_srv_conf_t *us, ngx_addr_t *peer_addr)
{
+ ngx_uint_t index;
ngx_http_upstream_check_peer_t *peer;
ngx_http_upstream_check_peers_t *peers;
ngx_http_upstream_check_srv_conf_t *ucscf;
@@ -787,10 +823,25 @@ ngx_http_upstream_check_add_peer(ngx_conf_t *cf,
return NGX_ERROR;
}
+ ngx_log_debug1(NGX_LOG_DEBUG_HTTP, cf->log, 0,
+ "http upstream check add upstream process: %ui",
+ ngx_process);
+
+ if (ngx_process == NGX_PROCESS_WORKER) {
+ return ngx_http_upstream_check_add_dynamic_peer(cf->pool, us, peer_addr);
+ }
+
ucmcf = ngx_http_conf_get_module_main_conf(cf,
ngx_http_upstream_check_module);
peers = ucmcf->peers;
+ if (ucscf->unique) {
+ index = ngx_http_upstream_check_unique_peer(peers, peer_addr, ucscf);
+ if (index != (ngx_uint_t) NGX_ERROR) {
+ return index;
+ }
+ }
+
peer = ngx_array_push(&peers->peers);
if (peer == NULL) {
return NGX_ERROR;
@@ -885,17 +936,380 @@ ngx_http_upstream_check_addr_change_port(ngx_pool_t *pool, ngx_addr_t *dst,
ngx_uint_t
+ngx_http_upstream_check_add_dynamic_peer(ngx_pool_t *pool,
+ ngx_http_upstream_srv_conf_t *us, ngx_addr_t *peer_addr)
+{
+ void *elts;
+ ngx_uint_t i, index;
+ ngx_http_upstream_check_peer_t *peer, *p, *np;
+ ngx_http_upstream_check_peers_t *peers;
+ ngx_http_upstream_check_srv_conf_t *ucscf;
+ ngx_http_upstream_check_main_conf_t *ucmcf;
+ ngx_http_upstream_check_peer_shm_t *peer_shm;
+ ngx_http_upstream_check_peers_shm_t *peers_shm;
+
+ if (check_peers_ctx == NULL || us->srv_conf == NULL) {
+ return NGX_ERROR;
+ }
+
+ ucscf = ngx_http_conf_upstream_srv_conf(us, ngx_http_upstream_check_module);
+
+ if(ucscf->check_interval == 0) {
+ return NGX_ERROR;
+ }
+
+ index = ngx_http_upstream_check_add_dynamic_peer_shm(pool,
+ ucscf, peer_addr);
+ if (index == (ngx_uint_t) NGX_ERROR) {
+ return index;
+ }
+
+ peers_shm = check_peers_ctx->peers_shm;
+ peer_shm = peers_shm->peers;
+
+ ucmcf = ngx_http_cycle_get_module_main_conf(ngx_cycle,
+ ngx_http_upstream_check_module);
+ peers = ucmcf->peers;
+ peer = NULL;
+
+ p = peers->peers.elts;
+
+ ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pool->log, 0,
+ "http upstream check add dynamic upstream: %p, n: %ui",
+ p, peers->peers.nelts);
+
+ for (i = 0; i < peers->peers.nelts; i++) {
+
+ ngx_log_debug3(NGX_LOG_DEBUG_HTTP, pool->log, 0,
+ "http upstream check add [%ui], index=%ui, delete:%ud",
+ i, p[i].index, p[i].delete);
+
+ if (p[i].delete) {
+ p[i].delete = 0;
+ peer = &p[i];
+ break;
+ }
+ }
+
+ if (peer == NULL) {
+
+ elts = peers->peers.elts;
+
+ peer = ngx_array_push(&peers->peers);
+ if (peer == NULL) {
+ return NGX_ERROR;
+ }
+
+ if (elts != peers->peers.elts) {
+
+ ngx_log_error(NGX_LOG_INFO, pool->log, 0,
+ "http upstream check add peer realloc memory");
+
+ /* reset all upstream peers' timers */
+ p = elts;
+ np = peers->peers.elts;
+
+ for (i = 0; i < peers->peers.nelts - 1; i++) {
+
+ if (p[i].delete) {
+ continue;
+ }
+ ngx_log_error(NGX_LOG_INFO, pool->log, 0,
+ "http upstream %V old peer: %p, new peer: %p,"
+ "old timer: %p, new timer: %p",
+ np[i].upstream_name,
+ np[i].check_ev.data, &np[i],
+ &p[i].check_ev, &np[i].check_ev);
+
+ ngx_http_upstream_check_clear_peer(&p[i]);
+
+ ngx_memzero(&np[i].pc, sizeof(ngx_peer_connection_t));
+ np[i].check_data = NULL;
+ np[i].pool = NULL;
+
+ ngx_http_upstream_check_add_timer(&np[i],
+ np[i].conf->check_type_conf,
+ 0, pool->log);
+ }
+ }
+ }
+
+ ngx_memzero(peer, sizeof(ngx_http_upstream_check_peer_t));
+
+ peer->conf = ucscf;
+ peer->index = index;
+ peer->upstream_name = &us->host;
+ peer->peer_addr = peer_addr;
+
+ ngx_log_debug3(NGX_LOG_DEBUG_HTTP, pool->log, 0,
+ "http upstream check add dynamic upstream: %V, "
+ "peer: %V, index: %ui",
+ &us->host, &peer_addr->name, index);
+
+ if (ucscf->port) {
+ peer->check_peer_addr = ngx_pcalloc(pool, sizeof(ngx_addr_t));
+ if (peer->check_peer_addr == NULL) {
+ return NGX_ERROR;
+ }
+
+ if (ngx_http_upstream_check_addr_change_port(pool,
+ peer->check_peer_addr, peer_addr, ucscf->port)
+ != NGX_OK) {
+
+ return NGX_ERROR;
+ }
+
+ } else {
+ peer->check_peer_addr = peer->peer_addr;
+ }
+
+ peer->shm = &peer_shm[index];
+
+ ngx_http_upstream_check_add_timer(peer, ucscf->check_type_conf,
+ 0, pool->log);
+
+ ngx_log_debug3(NGX_LOG_DEBUG_HTTP, pool->log, 0,
+ "http upstream check add peer: %p, index: %ui, shm->ref: %i",
+ peer, peer->index, peer->shm->ref);
+
+ peers->checksum +=
+ ngx_murmur_hash2(peer_addr->name.data, peer_addr->name.len);
+
+ return peer->index;
+}
+
+
+void
+ngx_http_upstream_check_delete_dynamic_peer(ngx_str_t *name,
+ ngx_addr_t *peer_addr)
+{
+ ngx_uint_t i;
+ ngx_http_upstream_check_peer_t *peer, *chosen;
+ ngx_http_upstream_check_peers_t *peers;
+
+ chosen = NULL;
+ peers = check_peers_ctx;
+ peer = peers->peers.elts;
+
+ ngx_log_debug2(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
+ "http upstream check delete dynamic upstream: %p, n: %ui",
+ peer, peers->peers.nelts);
+
+ ngx_log_debug2(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
+ "http upstream check delete dynamic upstream: %V, "
+ "peer: %V", name, &peer_addr->name);
+
+ for (i = 0; i < peers->peers.nelts; i++) {
+ if (peer[i].delete) {
+ continue;
+ }
+
+ ngx_log_debug3(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
+ "http upstream check delete [%ui], index=%ui, addr:%V",
+ i, peer[i].index, &peer[i].peer_addr->name);
+
+ if (peer[i].upstream_name->len != name->len
+ || ngx_strncmp(peer[i].upstream_name->data,
+ name->data, name->len) != 0) {
+ continue;
+ }
+
+ if (peer[i].peer_addr->socklen != peer_addr->socklen
+ || ngx_memcmp(peer[i].peer_addr->sockaddr, peer_addr->sockaddr,
+ peer_addr->socklen) != 0) {
+ continue;
+ }
+
+ chosen = &peer[i];
+ break;
+ }
+
+ if (chosen == NULL) {
+ return;
+ }
+
+ ngx_log_debug3(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
+ "http upstream check delete peer: %p, index: %ui, "
+ "shm->ref: %i",
+ chosen, chosen->index, chosen->shm->ref);
+
+ ngx_shmtx_lock(&chosen->shm->mutex);
+
+ if (chosen->shm->owner == ngx_pid) {
+ chosen->shm->owner = NGX_INVALID_PID;
+ }
+
+ chosen->shm->ref--;
+ if (chosen->shm->ref <= 0 && chosen->shm->delete != PEER_DELETED) {
+ ngx_http_upstream_check_clear_dynamic_peer_shm(chosen->shm);
+ chosen->shm->delete = PEER_DELETED;
+ }
+ ngx_shmtx_unlock(&chosen->shm->mutex);
+
+ ngx_http_upstream_check_clear_peer(chosen);
+}
+
+
+static ngx_uint_t
+ngx_http_upstream_check_add_dynamic_peer_shm(ngx_pool_t *pool,
+ ngx_http_upstream_check_srv_conf_t *ucscf, ngx_addr_t *peer_addr)
+{
+ ngx_int_t rc;
+ ngx_uint_t i, index;
+ ngx_slab_pool_t *shpool;
+ ngx_http_upstream_check_peer_shm_t *peer_shm;
+ ngx_http_upstream_check_peers_shm_t *peers_shm;
+
+ if (check_peers_ctx == NULL) {
+ return NGX_ERROR;
+ }
+
+ shpool = check_peers_ctx->shpool;
+ peers_shm = check_peers_ctx->peers_shm;
+ peer_shm = peers_shm->peers;
+ index = NGX_ERROR;
+
+ ngx_shmtx_lock(&shpool->mutex);
+
+ for (i = 0; i < peers_shm->number; i++) {
+
+ /* TODO: lock the peer mutex */
+ if (peer_shm[i].delete == PEER_DELETED) {
+ continue;
+ }
+
+ /* TODO: check the peer configure */
+ /* Merge the duplicate peer */
+ if (peer_addr->socklen == peer_shm[i].socklen &&
+ ngx_memcmp(peer_addr->sockaddr, peer_shm[i].sockaddr,
+ peer_addr->socklen) == 0) {
+
+ ngx_shmtx_unlock(&shpool->mutex);
+ return i;
+ }
+ }
+
+ for (i = 0; i < peers_shm->number; i++) {
+
+ if (peer_shm[i].delete == PEER_DELETED) {
+ peer_shm[i].delete = PEER_NORMAL;
+ index = i;
+ break;
+ }
+ }
+
+ if (index == (ngx_uint_t) NGX_ERROR) {
+ if (peers_shm->number >= peers_shm->max_number) {
+ goto fail;
+ }
+
+ index = peers_shm->number++;
+ }
+
+ ngx_memzero(&peer_shm[index], sizeof(ngx_http_upstream_check_peer_shm_t));
+
+ peer_shm[index].socklen = peer_addr->socklen;
+ peer_shm[index].sockaddr = ngx_slab_alloc_locked(shpool,
+ peer_shm->socklen);
+ if (peer_shm[index].sockaddr == NULL) {
+ goto fail;
+ }
+
+ ngx_memcpy(peer_shm[index].sockaddr, peer_addr->sockaddr,
+ peer_addr->socklen);
+
+ rc = ngx_http_upstream_check_init_shm_peer(&peer_shm[index], NULL,
+ ucscf->default_down, pool,
+ &peer_addr->name);
+ if (rc != NGX_OK) {
+ goto fail;
+ }
+
+ ngx_shmtx_unlock(&shpool->mutex);
+ return index;
+
+fail:
+
+ ngx_shmtx_unlock(&shpool->mutex);
+ return NGX_ERROR;
+}
+
+
+static void
+ngx_http_upstream_check_clear_dynamic_peer_shm(
+ ngx_http_upstream_check_peer_shm_t *peer_shm)
+{
+ if (check_peers_ctx == NULL) {
+ return;
+ }
+
+ ngx_slab_free_locked(check_peers_ctx->shpool, peer_shm->sockaddr);
+}
+
+
+
+static ngx_uint_t
+ngx_http_upstream_check_unique_peer(ngx_http_upstream_check_peers_t *peers,
+ ngx_addr_t *peer_addr, ngx_http_upstream_check_srv_conf_t *peer_conf)
+{
+ ngx_uint_t i;
+ ngx_http_upstream_check_peer_t *peer;
+ ngx_http_upstream_check_srv_conf_t *opeer_conf;
+
+ peer = peers->peers.elts;
+ for (i = 0; i < peers->peers.nelts; i++) {
+
+ if (peer[i].delete) {
+ continue;
+ }
+
+ if (peer[i].peer_addr->socklen != peer_addr->socklen) {
+ continue;
+ }
+
+ if (ngx_memcmp(peer[i].peer_addr->sockaddr,
+ peer_addr->sockaddr, peer_addr->socklen) != 0) {
+ continue;
+ }
+
+ opeer_conf = peer[i].conf;
+
+ if (opeer_conf->check_type_conf != peer_conf->check_type_conf) {
+ continue;
+ }
+
+ if (opeer_conf->send.len != peer_conf->send.len) {
+ continue;
+ }
+
+ if (ngx_strncmp(opeer_conf->send.data,
+ peer_conf->send.data, peer_conf->send.len) != 0) {
+ continue;
+ }
+
+ if (opeer_conf->code.status_alive != peer_conf->code.status_alive) {
+ continue;
+ }
+
+ return i;
+ }
+
+ return NGX_ERROR;
+}
+
+
+ngx_uint_t
ngx_http_upstream_check_peer_down(ngx_uint_t index)
{
- ngx_http_upstream_check_peer_t *peer;
+ ngx_http_upstream_check_peer_shm_t *peer_shm;
- if (check_peers_ctx == NULL || index >= check_peers_ctx->peers.nelts) {
+ if (upstream_check_index_invalid(check_peers_ctx, index)) {
return 0;
}
- peer = check_peers_ctx->peers.elts;
+ peer_shm = check_peers_ctx->peers_shm->peers;
- return (peer[index].shm->down);
+ return (peer_shm[index].down);
}
@@ -905,7 +1319,7 @@ ngx_http_upstream_check_get_peer(ngx_uint_t index)
{
ngx_http_upstream_check_peer_t *peer;
- if (check_peers_ctx == NULL || index >= check_peers_ctx->peers.nelts) {
+ if (upstream_check_index_invalid(check_peers_ctx, index)) {
return;
}
@@ -925,7 +1339,7 @@ ngx_http_upstream_check_free_peer(ngx_uint_t index)
{
ngx_http_upstream_check_peer_t *peer;
- if (check_peers_ctx == NULL || index >= check_peers_ctx->peers.nelts) {
+ if (upstream_check_index_invalid(check_peers_ctx, index)) {
return;
}
@@ -946,7 +1360,6 @@ ngx_http_upstream_check_add_timers(ngx_cycle_t *cycle)
{
ngx_uint_t i;
ngx_msec_t t, delay;
- ngx_check_conf_t *cf;
ngx_http_upstream_check_peer_t *peer;
ngx_http_upstream_check_peers_t *peers;
ngx_http_upstream_check_srv_conf_t *ucscf;
@@ -975,35 +1388,8 @@ ngx_http_upstream_check_add_timers(ngx_cycle_t *cycle)
peer_shm = peers_shm->peers;
for (i = 0; i < peers->peers.nelts; i++) {
- peer[i].shm = &peer_shm[i];
-
- peer[i].check_ev.handler = ngx_http_upstream_check_begin_handler;
- peer[i].check_ev.log = cycle->log;
- peer[i].check_ev.data = &peer[i];
- peer[i].check_ev.timer_set = 0;
-
- peer[i].check_timeout_ev.handler =
- ngx_http_upstream_check_timeout_handler;
- peer[i].check_timeout_ev.log = cycle->log;
- peer[i].check_timeout_ev.data = &peer[i];
- peer[i].check_timeout_ev.timer_set = 0;
ucscf = peer[i].conf;
- cf = ucscf->check_type_conf;
-
- if (cf->need_pool) {
- peer[i].pool = ngx_create_pool(ngx_pagesize, cycle->log);
- if (peer[i].pool == NULL) {
- return NGX_ERROR;
- }
- }
-
- peer[i].send_handler = cf->send_handler;
- peer[i].recv_handler = cf->recv_handler;
-
- peer[i].init = cf->init;
- peer[i].parse = cf->parse;
- peer[i].reinit = cf->reinit;
/*
* We add a random start time here, since we don't want to trigger
@@ -1012,19 +1398,59 @@ ngx_http_upstream_check_add_timers(ngx_cycle_t *cycle)
delay = ucscf->check_interval > 1000 ? ucscf->check_interval : 1000;
t = ngx_random() % delay;
- ngx_add_timer(&peer[i].check_ev, t);
+ peer[i].shm = &peer_shm[i];
+
+ ngx_http_upstream_check_add_timer(&peer[i], ucscf->check_type_conf, t, cycle->log);
+
}
return NGX_OK;
}
+static ngx_int_t
+ngx_http_upstream_check_add_timer(ngx_http_upstream_check_peer_t *peer,
+ ngx_check_conf_t *check_conf, ngx_msec_t timer, ngx_log_t *log)
+{
+ peer->check_ev.handler = ngx_http_upstream_check_begin_handler;
+ peer->check_ev.log = log;
+ peer->check_ev.data = peer;
+ peer->check_ev.timer_set = 0;
+
+ peer->check_timeout_ev.handler =
+ ngx_http_upstream_check_timeout_handler;
+ peer->check_timeout_ev.log = log;
+ peer->check_timeout_ev.data = peer;
+ peer->check_timeout_ev.timer_set = 0;
+
+ if (check_conf->need_pool) {
+ peer->pool = ngx_create_pool(ngx_pagesize, log);
+ if (peer->pool == NULL) {
+ return NGX_ERROR;
+ }
+ }
+
+ peer->send_handler = check_conf->send_handler;
+ peer->recv_handler = check_conf->recv_handler;
+
+ peer->init = check_conf->init;
+ peer->parse = check_conf->parse;
+ peer->reinit = check_conf->reinit;
+
+ ngx_add_timer(&peer->check_ev, timer);
+
+ /* TODO: lock */
+ peer->shm->ref++;
+
+ return NGX_OK;
+}
+
+
static void
ngx_http_upstream_check_begin_handler(ngx_event_t *event)
{
ngx_msec_t interval;
ngx_http_upstream_check_peer_t *peer;
- ngx_http_upstream_check_peers_t *peers;
ngx_http_upstream_check_srv_conf_t *ucscf;
ngx_http_upstream_check_peers_shm_t *peers_shm;
@@ -1032,16 +1458,11 @@ ngx_http_upstream_check_begin_handler(ngx_event_t *event)
return;
}
- peers = check_peers_ctx;
- if (peers == NULL) {
- return;
- }
-
- peers_shm = peers->peers_shm;
- if (peers_shm == NULL) {
+ if (check_peers_ctx == NULL) {
return;
}
+ peers_shm = check_peers_ctx->peers_shm;
peer = event->data;
ucscf = peer->conf;
@@ -1069,8 +1490,8 @@ ngx_http_upstream_check_begin_handler(ngx_event_t *event)
}
if ((interval >= ucscf->check_interval)
- && (peer->shm->owner == NGX_INVALID_PID))
- {
+ && (peer->shm->owner == NGX_INVALID_PID)) {
+
peer->shm->owner = ngx_pid;
} else if (interval >= (ucscf->check_interval << 4)) {
@@ -1079,8 +1500,8 @@ ngx_http_upstream_check_begin_handler(ngx_event_t *event)
* If the check peer has been untouched for 2^4 times of
* the check interval, activate the current timer.
* Sometimes, the checking process may disappear
- * in some circumstances, and the clean event will never
- * be triggered.
+ * under some abnormal circumstances, and the clean event
+ * will never be triggered.
*/
peer->shm->owner = ngx_pid;
peer->shm->access_time = ngx_current_msec;
@@ -1324,6 +1745,10 @@ ngx_http_upstream_check_send_handler(ngx_event_t *event)
ctx = peer->check_data;
+ ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
+ "http check send total: %z",
+ ctx->send.last - ctx->send.pos);
+
while (ctx->send.pos < ctx->send.last) {
size = c->send(c, ctx->send.pos, ctx->send.last - ctx->send.pos);
@@ -1339,9 +1764,9 @@ ngx_http_upstream_check_send_handler(ngx_event_t *event)
}
#endif
- if (size > 0) {
+ if (size >= 0) {
ctx->send.pos += size;
- } else if (size == 0 || size == NGX_AGAIN) {
+ } else if (size == NGX_AGAIN) {
return;
} else {
c->error = 1;
@@ -1392,7 +1817,7 @@ ngx_http_upstream_check_recv_handler(ngx_event_t *event)
ctx = peer->check_data;
if (ctx->recv.start == NULL) {
- /* 1/2 of the page_size, is it enough? */
+ /* half of the page_size, is it enough? */
ctx->recv.start = ngx_palloc(c->pool, ngx_pagesize / 2);
if (ctx->recv.start == NULL) {
goto check_recv_fail;
@@ -1456,12 +1881,6 @@ ngx_http_upstream_check_recv_handler(ngx_event_t *event)
case NGX_AGAIN:
/* The peer has closed its half side of the connection. */
- if (size == 0) {
- ngx_http_upstream_check_status_update(peer, 0);
- c->error = 1;
- break;
- }
-
return;
case NGX_ERROR:
@@ -1486,6 +1905,7 @@ ngx_http_upstream_check_recv_handler(ngx_event_t *event)
return;
check_recv_fail:
+
ngx_http_upstream_check_status_update(peer, 0);
ngx_http_upstream_check_clean_event(peer);
}
@@ -2513,6 +2933,14 @@ ngx_http_upstream_check_status_update(ngx_http_upstream_check_peer_t *peer,
ucscf = peer->conf;
+ ngx_shmtx_lock(&peer->shm->mutex);
+
+ if (peer->shm->delete == PEER_DELETED) {
+
+ ngx_shmtx_unlock(&peer->shm->mutex);
+ return;
+ }
+
if (result) {
peer->shm->rise_count++;
peer->shm->fall_count = 0;
@@ -2534,6 +2962,8 @@ ngx_http_upstream_check_status_update(ngx_http_upstream_check_peer_t *peer,
}
peer->shm->access_time = ngx_current_msec;
+
+ ngx_shmtx_unlock(&peer->shm->mutex);
}
@@ -2624,7 +3054,6 @@ static void
ngx_http_upstream_check_clear_all_events()
{
ngx_uint_t i;
- ngx_connection_t *c;
ngx_http_upstream_check_peer_t *peer;
ngx_http_upstream_check_peers_t *peers;
@@ -2643,26 +3072,45 @@ ngx_http_upstream_check_clear_all_events()
peer = peers->peers.elts;
for (i = 0; i < peers->peers.nelts; i++) {
-
- if (peer[i].check_ev.timer_set) {
- ngx_del_timer(&peer[i].check_ev);
+ if (peer[i].delete) {
+ continue;
}
- if (peer[i].check_timeout_ev.timer_set) {
- ngx_del_timer(&peer[i].check_timeout_ev);
- }
+ ngx_http_upstream_check_clear_peer(&peer[i]);
+ }
+}
- c = peer[i].pc.connection;
- if (c) {
- ngx_close_connection(c);
- peer[i].pc.connection = NULL;
- }
- if (peer[i].pool != NULL) {
- ngx_destroy_pool(peer[i].pool);
- peer[i].pool = NULL;
- }
+static void
+ngx_http_upstream_check_clear_peer(ngx_http_upstream_check_peer_t *peer)
+{
+ if (peer != peer->check_ev.data) {
+ ngx_log_error(NGX_LOG_CRIT, ngx_cycle->log, 0,
+ "different peer: %p, data: %p, timer: %p",
+ peer, peer->check_ev.data, &peer->check_ev);
+ }
+
+ if (peer->pc.connection) {
+ ngx_close_connection(peer->pc.connection);
+ peer->pc.connection = NULL;
}
+
+ if (peer->check_ev.timer_set) {
+ ngx_del_timer(&peer->check_ev);
+ }
+
+ if (peer->check_timeout_ev.timer_set) {
+ ngx_del_timer(&peer->check_timeout_ev);
+ }
+
+ if (peer->pool != NULL) {
+ ngx_destroy_pool(peer->pool);
+ peer->pool = NULL;
+ }
+
+ ngx_memzero(peer, sizeof(ngx_http_upstream_check_peer_t));
+
+ peer->delete = 1;
}
@@ -2814,7 +3262,7 @@ ngx_http_upstream_check_status_command_status(
} else if (value->len == (sizeof("up") - 1)
&& ngx_strncasecmp(value->data, (u_char *) "up", value->len)
- == 0) {
+ == 0) {
ctx->flag |= NGX_CHECK_STATUS_UP;
@@ -2837,8 +3285,13 @@ ngx_http_upstream_check_status_html_format(ngx_buf_t *b,
count = 0;
+ /* TODO: two locks */
for (i = 0; i < peers->peers.nelts; i++) {
+ if (peer[i].delete) {
+ continue;
+ }
+
if (flag & NGX_CHECK_STATUS_DOWN) {
if (!peer[i].shm->down) {
@@ -2881,6 +3334,10 @@ ngx_http_upstream_check_status_html_format(ngx_buf_t *b,
for (i = 0; i < peers->peers.nelts; i++) {
+ if (peer[i].delete) {
+ continue;
+ }
+
if (flag & NGX_CHECK_STATUS_DOWN) {
if (!peer[i].shm->down) {
@@ -2933,6 +3390,10 @@ ngx_http_upstream_check_status_csv_format(ngx_buf_t *b,
peer = peers->peers.elts;
for (i = 0; i < peers->peers.nelts; i++) {
+ if (peer[i].delete) {
+ continue;
+ }
+
if (flag & NGX_CHECK_STATUS_DOWN) {
if (!peer[i].shm->down) {
@@ -2973,6 +3434,10 @@ ngx_http_upstream_check_status_json_format(ngx_buf_t *b,
for (i = 0; i < peers->peers.nelts; i++) {
+ if (peer[i].delete) {
+ continue;
+ }
+
if (flag & NGX_CHECK_STATUS_DOWN) {
if (!peer[i].shm->down) {
@@ -3000,6 +3465,10 @@ ngx_http_upstream_check_status_json_format(ngx_buf_t *b,
last = peers->peers.nelts - 1;
for (i = 0; i < peers->peers.nelts; i++) {
+ if (peer[i].delete) {
+ continue;
+ }
+
if (flag & NGX_CHECK_STATUS_DOWN) {
if (!peer[i].shm->down) {
@@ -3072,8 +3541,9 @@ static char *
ngx_http_upstream_check(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_str_t *value, s;
- ngx_uint_t i, port, rise, fall, default_down;
+ ngx_uint_t i, port, rise, fall, default_down, unique;
ngx_msec_t interval, timeout;
+ ngx_check_conf_t *check;
ngx_http_upstream_check_srv_conf_t *ucscf;
/* default values */
@@ -3083,6 +3553,7 @@ ngx_http_upstream_check(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
interval = 30000;
timeout = 1000;
default_down = 1;
+ unique = 0;
value = cf->args->elts;
@@ -3186,6 +3657,25 @@ ngx_http_upstream_check(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
continue;
}
+ if (ngx_strncmp(value[i].data, "unique=", 7) == 0) {
+ s.len = value[i].len - 7;
+ s.data = value[i].data + 7;
+
+ if (ngx_strcasecmp(s.data, (u_char *) "true") == 0) {
+ unique = 1;
+ } else if (ngx_strcasecmp(s.data, (u_char *) "false") == 0) {
+ unique = 0;
+ } else {
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "invalid value \"%s\", "
+ "it must be \"true\" or \"false\"",
+ value[i].data);
+ return NGX_CONF_ERROR;
+ }
+
+ continue;
+ }
+
goto invalid_check_parameter;
}
@@ -3195,12 +3685,24 @@ ngx_http_upstream_check(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
ucscf->fall_count = fall;
ucscf->rise_count = rise;
ucscf->default_down = default_down;
+ ucscf->unique = unique;
if (ucscf->check_type_conf == NGX_CONF_UNSET_PTR) {
ngx_str_set(&s, "tcp");
ucscf->check_type_conf = ngx_http_get_check_type_conf(&s);
}
+ check = ucscf->check_type_conf;
+
+ if (ucscf->send.len == 0) {
+ ucscf->send.data = check->default_send.data;
+ ucscf->send.len = check->default_send.len;
+ }
+
+ if (ucscf->code.status_alive == 0) {
+ ucscf->code.status_alive = check->default_status_alive;
+ }
+
return NGX_CONF_OK;
invalid_check_parameter:
@@ -3297,7 +3799,7 @@ ngx_http_upstream_check_http_expect_alive(ngx_conf_t *cf, ngx_command_t *cmd,
ucscf = ngx_http_conf_get_module_srv_conf(cf,
ngx_http_upstream_check_module);
- bit = ucscf->code.status_alive;
+ bit = 0;
for (i = 1; i < cf->args->nelts; i++) {
for (m = 0; mask[m].name.len != 0; m++) {
@@ -3430,12 +3932,22 @@ ngx_http_upstream_check_create_main_conf(ngx_conf_t *cf)