diff options
Diffstat (limited to 'app/nginx/src/stream/ngx_stream_upstream_least_conn_module.c')
| -rw-r--r-- | app/nginx/src/stream/ngx_stream_upstream_least_conn_module.c | 310 |
1 files changed, 0 insertions, 310 deletions
diff --git a/app/nginx/src/stream/ngx_stream_upstream_least_conn_module.c b/app/nginx/src/stream/ngx_stream_upstream_least_conn_module.c deleted file mode 100644 index 739b20a..0000000 --- a/app/nginx/src/stream/ngx_stream_upstream_least_conn_module.c +++ /dev/null @@ -1,310 +0,0 @@ - -/* - * Copyright (C) Maxim Dounin - * Copyright (C) Nginx, Inc. - */ - - -#include <ngx_config.h> -#include <ngx_core.h> -#include <ngx_stream.h> - - -static ngx_int_t ngx_stream_upstream_init_least_conn_peer( - ngx_stream_session_t *s, ngx_stream_upstream_srv_conf_t *us); -static ngx_int_t ngx_stream_upstream_get_least_conn_peer( - ngx_peer_connection_t *pc, void *data); -static char *ngx_stream_upstream_least_conn(ngx_conf_t *cf, ngx_command_t *cmd, - void *conf); - - -static ngx_command_t ngx_stream_upstream_least_conn_commands[] = { - - { ngx_string("least_conn"), - NGX_STREAM_UPS_CONF|NGX_CONF_NOARGS, - ngx_stream_upstream_least_conn, - 0, - 0, - NULL }, - - ngx_null_command -}; - - -static ngx_stream_module_t ngx_stream_upstream_least_conn_module_ctx = { - NULL, /* preconfiguration */ - NULL, /* postconfiguration */ - - NULL, /* create main configuration */ - NULL, /* init main configuration */ - - NULL, /* create server configuration */ - NULL /* merge server configuration */ -}; - - -ngx_module_t ngx_stream_upstream_least_conn_module = { - NGX_MODULE_V1, - &ngx_stream_upstream_least_conn_module_ctx, /* module context */ - ngx_stream_upstream_least_conn_commands, /* module directives */ - NGX_STREAM_MODULE, /* module type */ - NULL, /* init master */ - NULL, /* init module */ - NULL, /* init process */ - NULL, /* init thread */ - NULL, /* exit thread */ - NULL, /* exit process */ - NULL, /* exit master */ - NGX_MODULE_V1_PADDING -}; - - -static ngx_int_t -ngx_stream_upstream_init_least_conn(ngx_conf_t *cf, - ngx_stream_upstream_srv_conf_t *us) -{ - ngx_log_debug0(NGX_LOG_DEBUG_STREAM, cf->log, 0, - "init least conn"); - - if (ngx_stream_upstream_init_round_robin(cf, us) != NGX_OK) { - return NGX_ERROR; - } - - us->peer.init = ngx_stream_upstream_init_least_conn_peer; - - return NGX_OK; -} - - -static ngx_int_t -ngx_stream_upstream_init_least_conn_peer(ngx_stream_session_t *s, - ngx_stream_upstream_srv_conf_t *us) -{ - ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, - "init least conn peer"); - - if (ngx_stream_upstream_init_round_robin_peer(s, us) != NGX_OK) { - return NGX_ERROR; - } - - s->upstream->peer.get = ngx_stream_upstream_get_least_conn_peer; - - return NGX_OK; -} - - -static ngx_int_t -ngx_stream_upstream_get_least_conn_peer(ngx_peer_connection_t *pc, void *data) -{ - ngx_stream_upstream_rr_peer_data_t *rrp = data; - - time_t now; - uintptr_t m; - ngx_int_t rc, total; - ngx_uint_t i, n, p, many; - ngx_stream_upstream_rr_peer_t *peer, *best; - ngx_stream_upstream_rr_peers_t *peers; - - ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, - "get least conn peer, try: %ui", pc->tries); - - if (rrp->peers->single) { - return ngx_stream_upstream_get_round_robin_peer(pc, rrp); - } - - pc->connection = NULL; - - now = ngx_time(); - - peers = rrp->peers; - - ngx_stream_upstream_rr_peers_wlock(peers); - - best = NULL; - total = 0; - -#if (NGX_SUPPRESS_WARN) - many = 0; - p = 0; -#endif - - for (peer = peers->peer, i = 0; - peer; - peer = peer->next, i++) - { - n = i / (8 * sizeof(uintptr_t)); - m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t)); - - if (rrp->tried[n] & m) { - continue; - } - - if (peer->down) { - continue; - } - - if (peer->max_fails - && peer->fails >= peer->max_fails - && now - peer->checked <= peer->fail_timeout) - { - continue; - } - - if (peer->max_conns && peer->conns >= peer->max_conns) { - continue; - } - - /* - * select peer with least number of connections; if there are - * multiple peers with the same number of connections, select - * based on round-robin - */ - - if (best == NULL - || peer->conns * best->weight < best->conns * peer->weight) - { - best = peer; - many = 0; - p = i; - - } else if (peer->conns * best->weight == best->conns * peer->weight) { - many = 1; - } - } - - if (best == NULL) { - ngx_log_debug0(NGX_LOG_DEBUG_STREAM, pc->log, 0, - "get least conn peer, no peer found"); - - goto failed; - } - - if (many) { - ngx_log_debug0(NGX_LOG_DEBUG_STREAM, pc->log, 0, - "get least conn peer, many"); - - for (peer = best, i = p; - peer; - peer = peer->next, i++) - { - n = i / (8 * sizeof(uintptr_t)); - m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t)); - - if (rrp->tried[n] & m) { - continue; - } - - if (peer->down) { - continue; - } - - if (peer->conns * best->weight != best->conns * peer->weight) { - continue; - } - - if (peer->max_fails - && peer->fails >= peer->max_fails - && now - peer->checked <= peer->fail_timeout) - { - continue; - } - - if (peer->max_conns && peer->conns >= peer->max_conns) { - continue; - } - - peer->current_weight += peer->effective_weight; - total += peer->effective_weight; - - if (peer->effective_weight < peer->weight) { - peer->effective_weight++; - } - - if (peer->current_weight > best->current_weight) { - best = peer; - p = i; - } - } - } - - best->current_weight -= total; - - if (now - best->checked > best->fail_timeout) { - best->checked = now; - } - - pc->sockaddr = best->sockaddr; - pc->socklen = best->socklen; - pc->name = &best->name; - - best->conns++; - - rrp->current = best; - - n = p / (8 * sizeof(uintptr_t)); - m = (uintptr_t) 1 << p % (8 * sizeof(uintptr_t)); - - rrp->tried[n] |= m; - - ngx_stream_upstream_rr_peers_unlock(peers); - - return NGX_OK; - -failed: - - if (peers->next) { - ngx_log_debug0(NGX_LOG_DEBUG_STREAM, pc->log, 0, - "get least conn peer, backup servers"); - - rrp->peers = peers->next; - - n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) - / (8 * sizeof(uintptr_t)); - - for (i = 0; i < n; i++) { - rrp->tried[i] = 0; - } - - ngx_stream_upstream_rr_peers_unlock(peers); - - rc = ngx_stream_upstream_get_least_conn_peer(pc, rrp); - - if (rc != NGX_BUSY) { - return rc; - } - - ngx_stream_upstream_rr_peers_wlock(peers); - } - - ngx_stream_upstream_rr_peers_unlock(peers); - - pc->name = peers->name; - - return NGX_BUSY; -} - - -static char * -ngx_stream_upstream_least_conn(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) -{ - ngx_stream_upstream_srv_conf_t *uscf; - - uscf = ngx_stream_conf_get_module_srv_conf(cf, ngx_stream_upstream_module); - - if (uscf->peer.init_upstream) { - ngx_conf_log_error(NGX_LOG_WARN, cf, 0, - "load balancing method redefined"); - } - - uscf->peer.init_upstream = ngx_stream_upstream_init_least_conn; - - uscf->flags = NGX_STREAM_UPSTREAM_CREATE - |NGX_STREAM_UPSTREAM_WEIGHT - |NGX_STREAM_UPSTREAM_MAX_CONNS - |NGX_STREAM_UPSTREAM_MAX_FAILS - |NGX_STREAM_UPSTREAM_FAIL_TIMEOUT - |NGX_STREAM_UPSTREAM_DOWN - |NGX_STREAM_UPSTREAM_BACKUP; - - return NGX_CONF_OK; -} |