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ngx_lua-0.10.26_01-dyn_upstream_keepalive.patch
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ngx_lua-0.10.26_01-dyn_upstream_keepalive.patch
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diff --git a/bundle/ngx_lua-0.10.26/src/ngx_http_lua_balancer.c b/bundle/ngx_lua-0.10.26/src/ngx_http_lua_balancer.c
index af4da733..407c115b 100644
--- a/bundle/ngx_lua-0.10.26/src/ngx_http_lua_balancer.c
+++ b/bundle/ngx_lua-0.10.26/src/ngx_http_lua_balancer.c
@@ -16,46 +16,104 @@
#include "ngx_http_lua_directive.h"
+typedef struct {
+ ngx_uint_t size;
+ ngx_uint_t connections;
+
+ ngx_str_t cpool_name;
+
+ lua_State *lua_vm;
+
+ ngx_queue_t cache;
+ ngx_queue_t free;
+} ngx_http_lua_balancer_keepalive_pool_t;
+
+
+typedef struct {
+ ngx_queue_t queue;
+ ngx_connection_t *connection;
+
+ ngx_http_lua_balancer_keepalive_pool_t *cpool;
+} ngx_http_lua_balancer_keepalive_item_t;
+
+
struct ngx_http_lua_balancer_peer_data_s {
- /* the round robin data must be first */
- ngx_http_upstream_rr_peer_data_t rrp;
+ ngx_uint_t cpool_size;
+ ngx_uint_t keepalive_requests;
+ ngx_msec_t keepalive_timeout;
+
+ ngx_uint_t more_tries;
+ ngx_uint_t total_tries;
+
+ int last_peer_state;
- ngx_http_lua_srv_conf_t *conf;
- ngx_http_request_t *request;
+ ngx_str_t cpool_name;
- ngx_uint_t more_tries;
- ngx_uint_t total_tries;
+ void *data;
- struct sockaddr *sockaddr;
- socklen_t socklen;
+ ngx_event_get_peer_pt original_get_peer;
+ ngx_event_free_peer_pt original_free_peer;
+
+#if (NGX_HTTP_SSL)
+ ngx_event_set_peer_session_pt original_set_session;
+ ngx_event_save_peer_session_pt original_save_session;
+#endif
- ngx_str_t *host;
- in_port_t port;
+ ngx_http_request_t *request;
+ ngx_http_lua_srv_conf_t *conf;
+ ngx_http_lua_balancer_keepalive_pool_t *cpool;
- int last_peer_state;
+ ngx_str_t *host;
+
+ struct sockaddr *sockaddr;
+ socklen_t socklen;
+
+ unsigned keepalive:1;
#if !(HAVE_NGX_UPSTREAM_TIMEOUT_FIELDS)
- unsigned cloned_upstream_conf; /* :1 */
+ unsigned cloned_upstream_conf:1;
#endif
};
-#if (NGX_HTTP_SSL)
-static ngx_int_t ngx_http_lua_balancer_set_session(ngx_peer_connection_t *pc,
- void *data);
-static void ngx_http_lua_balancer_save_session(ngx_peer_connection_t *pc,
- void *data);
-#endif
+static ngx_int_t ngx_http_lua_balancer_by_chunk(lua_State *L,
+ ngx_http_request_t *r);
static ngx_int_t ngx_http_lua_balancer_init(ngx_conf_t *cf,
ngx_http_upstream_srv_conf_t *us);
static ngx_int_t ngx_http_lua_balancer_init_peer(ngx_http_request_t *r,
ngx_http_upstream_srv_conf_t *us);
static ngx_int_t ngx_http_lua_balancer_get_peer(ngx_peer_connection_t *pc,
void *data);
-static ngx_int_t ngx_http_lua_balancer_by_chunk(lua_State *L,
- ngx_http_request_t *r);
static void ngx_http_lua_balancer_free_peer(ngx_peer_connection_t *pc,
void *data, ngx_uint_t state);
+static ngx_int_t ngx_http_lua_balancer_create_keepalive_pool(lua_State *L,
+ ngx_log_t *log, ngx_str_t *cpool_name, ngx_uint_t cpool_size,
+ ngx_http_lua_balancer_keepalive_pool_t **cpool);
+static void ngx_http_lua_balancer_get_keepalive_pool(lua_State *L,
+ ngx_log_t *log, ngx_str_t *cpool_name,
+ ngx_http_lua_balancer_keepalive_pool_t **cpool);
+static void ngx_http_lua_balancer_free_keepalive_pool(ngx_log_t *log,
+ ngx_http_lua_balancer_keepalive_pool_t *cpool);
+static void ngx_http_lua_balancer_close(ngx_connection_t *c);
+static void ngx_http_lua_balancer_dummy_handler(ngx_event_t *ev);
+static void ngx_http_lua_balancer_close_handler(ngx_event_t *ev);
+#if (NGX_HTTP_SSL)
+static ngx_int_t ngx_http_lua_balancer_set_session(ngx_peer_connection_t *pc,
+ void *data);
+static void ngx_http_lua_balancer_save_session(ngx_peer_connection_t *pc,
+ void *data);
+#endif
+
+
+#define ngx_http_lua_balancer_keepalive_is_enabled(bp) \
+ (bp->keepalive)
+
+#define ngx_http_lua_balancer_peer_set(bp) \
+ (bp->sockaddr && bp->socklen)
+
+
+static char ngx_http_lua_balancer_keepalive_pools_table_key;
+static struct sockaddr *ngx_http_lua_balancer_default_server_sockaddr;
ngx_int_t
@@ -102,6 +160,61 @@ ngx_http_lua_balancer_handler_inline(ngx_http_request_t *r,
}
+static ngx_int_t
+ngx_http_lua_balancer_by_chunk(lua_State *L, ngx_http_request_t *r)
+{
+ u_char *err_msg;
+ size_t len;
+ ngx_int_t rc;
+
+ /* init nginx context in Lua VM */
+ ngx_http_lua_set_req(L, r);
+
+#ifndef OPENRESTY_LUAJIT
+ ngx_http_lua_create_new_globals_table(L, 0 /* narr */, 1 /* nrec */);
+
+ /* {{{ make new env inheriting main thread's globals table */
+ lua_createtable(L, 0, 1 /* nrec */); /* the metatable for the new env */
+ ngx_http_lua_get_globals_table(L);
+ lua_setfield(L, -2, "__index");
+ lua_setmetatable(L, -2); /* setmetatable({}, {__index = _G}) */
+ /* }}} */
+
+ lua_setfenv(L, -2); /* set new running env for the code closure */
+#endif /* OPENRESTY_LUAJIT */
+
+ lua_pushcfunction(L, ngx_http_lua_traceback);
+ lua_insert(L, 1); /* put it under chunk and args */
+
+ /* protected call user code */
+ rc = lua_pcall(L, 0, 1, 1);
+
+ lua_remove(L, 1); /* remove traceback function */
+
+ dd("rc == %d", (int) rc);
+
+ if (rc != 0) {
+ /* error occurred when running loaded code */
+ err_msg = (u_char *) lua_tolstring(L, -1, &len);
+
+ if (err_msg == NULL) {
+ err_msg = (u_char *) "unknown reason";
+ len = sizeof("unknown reason") - 1;
+ }
+
+ ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+ "failed to run balancer_by_lua*: %*s", len, err_msg);
+
+ lua_settop(L, 0); /* clear remaining elems on stack */
+
+ return NGX_ERROR;
+ }
+
+ lua_settop(L, 0); /* clear remaining elems on stack */
+ return rc;
+}
+
+
char *
ngx_http_lua_balancer_by_lua_block(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf)
@@ -125,18 +238,20 @@ char *
ngx_http_lua_balancer_by_lua(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf)
{
- size_t chunkname_len;
- u_char *chunkname;
- u_char *cache_key = NULL;
- u_char *name;
- ngx_str_t *value;
- ngx_http_lua_srv_conf_t *lscf = conf;
-
+ size_t chunkname_len;
+ u_char *chunkname;
+ u_char *cache_key = NULL;
+ u_char *name;
+ ngx_str_t *value;
+ ngx_url_t url;
ngx_http_upstream_srv_conf_t *uscf;
+ ngx_http_upstream_server_t *us;
+ ngx_http_lua_srv_conf_t *lscf = conf;
dd("enter");
- /* must specify a content handler */
+ /* content handler setup */
+
if (cmd->post == NULL) {
return NGX_CONF_ERROR;
}
@@ -188,11 +303,42 @@ ngx_http_lua_balancer_by_lua(ngx_conf_t *cf, ngx_command_t *cmd,
lscf->balancer.src_key = cache_key;
+ /* balancer setup */
+
uscf = ngx_http_conf_get_module_srv_conf(cf, ngx_http_upstream_module);
+ if (uscf->servers->nelts == 0) {
+ us = ngx_array_push(uscf->servers);
+ if (us == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ ngx_memzero(us, sizeof(ngx_http_upstream_server_t));
+ ngx_memzero(&url, sizeof(ngx_url_t));
+
+ ngx_str_set(&url.url, "0.0.0.1");
+ url.default_port = 80;
+
+ if (ngx_parse_url(cf->pool, &url) != NGX_OK) {
+ return NGX_CONF_ERROR;
+ }
+
+ us->name = url.url;
+ us->addrs = url.addrs;
+ us->naddrs = url.naddrs;
+
+ ngx_http_lua_balancer_default_server_sockaddr = us->addrs[0].sockaddr;
+ }
+
if (uscf->peer.init_upstream) {
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"load balancing method redefined");
+
+ lscf->balancer.original_init_upstream = uscf->peer.init_upstream;
+
+ } else {
+ lscf->balancer.original_init_upstream =
+ ngx_http_upstream_init_round_robin;
}
uscf->peer.init_upstream = ngx_http_lua_balancer_init;
@@ -208,14 +354,18 @@ ngx_http_lua_balancer_by_lua(ngx_conf_t *cf, ngx_command_t *cmd,
static ngx_int_t
-ngx_http_lua_balancer_init(ngx_conf_t *cf,
- ngx_http_upstream_srv_conf_t *us)
+ngx_http_lua_balancer_init(ngx_conf_t *cf, ngx_http_upstream_srv_conf_t *us)
{
- if (ngx_http_upstream_init_round_robin(cf, us) != NGX_OK) {
+ ngx_http_lua_srv_conf_t *lscf;
+
+ lscf = ngx_http_conf_upstream_srv_conf(us, ngx_http_lua_module);
+
+ if (lscf->balancer.original_init_upstream(cf, us) != NGX_OK) {
return NGX_ERROR;
}
- /* this callback is called upon individual requests */
+ lscf->balancer.original_init_peer = us->peer.init;
+
us->peer.init = ngx_http_lua_balancer_init_peer;
return NGX_OK;
@@ -226,33 +376,38 @@ static ngx_int_t
ngx_http_lua_balancer_init_peer(ngx_http_request_t *r,
ngx_http_upstream_srv_conf_t *us)
{
- ngx_http_lua_srv_conf_t *bcf;
+ ngx_http_lua_srv_conf_t *lscf;
ngx_http_lua_balancer_peer_data_t *bp;
- bp = ngx_pcalloc(r->pool, sizeof(ngx_http_lua_balancer_peer_data_t));
- if (bp == NULL) {
+ lscf = ngx_http_conf_upstream_srv_conf(us, ngx_http_lua_module);
+
+ if (lscf->balancer.original_init_peer(r, us) != NGX_OK) {
return NGX_ERROR;
}
- r->upstream->peer.data = &bp->rrp;
-
- if (ngx_http_upstream_init_round_robin_peer(r, us) != NGX_OK) {
+ bp = ngx_pcalloc(r->pool, sizeof(ngx_http_lua_balancer_peer_data_t));
+ if (bp == NULL) {
return NGX_ERROR;
}
+ bp->conf = lscf;
+ bp->request = r;
+ bp->data = r->upstream->peer.data;
+ bp->original_get_peer = r->upstream->peer.get;
+ bp->original_free_peer = r->upstream->peer.free;
+
+ r->upstream->peer.data = bp;
r->upstream->peer.get = ngx_http_lua_balancer_get_peer;
r->upstream->peer.free = ngx_http_lua_balancer_free_peer;
#if (NGX_HTTP_SSL)
+ bp->original_set_session = r->upstream->peer.set_session;
+ bp->original_save_session = r->upstream->peer.save_session;
+
r->upstream->peer.set_session = ngx_http_lua_balancer_set_session;
r->upstream->peer.save_session = ngx_http_lua_balancer_save_session;
#endif
- bcf = ngx_http_conf_upstream_srv_conf(us, ngx_http_lua_module);
-
- bp->conf = bcf;
- bp->request = r;
-
return NGX_OK;
}
@@ -260,25 +415,26 @@ ngx_http_lua_balancer_init_peer(ngx_http_request_t *r,
static ngx_int_t
ngx_http_lua_balancer_get_peer(ngx_peer_connection_t *pc, void *data)
{
- lua_State *L;
- ngx_int_t rc;
- ngx_http_request_t *r;
- ngx_http_lua_ctx_t *ctx;
- ngx_http_lua_srv_conf_t *lscf;
- ngx_http_lua_main_conf_t *lmcf;
- ngx_http_lua_balancer_peer_data_t *bp = data;
+ lua_State *L;
+ ngx_int_t rc;
+ ngx_queue_t *q;
+ ngx_connection_t *c;
+ ngx_http_request_t *r;
+ ngx_http_lua_ctx_t *ctx;
+ ngx_http_lua_srv_conf_t *lscf;
+ ngx_http_lua_balancer_keepalive_item_t *item;
+ ngx_http_lua_balancer_peer_data_t *bp = data;
+ void *pdata;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0,
- "lua balancer peer, tries: %ui", pc->tries);
-
- lscf = bp->conf;
+ "lua balancer: get peer, tries: %ui", pc->tries);
r = bp->request;
+ lscf = bp->conf;
ngx_http_lua_assert(lscf->balancer.handler && r);
ctx = ngx_http_get_module_ctx(r, ngx_http_lua_module);
-
if (ctx == NULL) {
ctx = ngx_http_lua_create_ctx(r);
if (ctx == NULL) {
@@ -296,21 +452,23 @@ ngx_http_lua_balancer_get_peer(ngx_peer_connection_t *pc, void *data)
ctx->context = NGX_HTTP_LUA_CONTEXT_BALANCER;
+ bp->cpool = NULL;
bp->sockaddr = NULL;
bp->socklen = 0;
bp->more_tries = 0;
+ bp->cpool_size = 0;
+ bp->keepalive_requests = 0;
+ bp->keepalive_timeout = 0;
+ bp->keepalive = 0;
bp->total_tries++;
- lmcf = ngx_http_get_module_main_conf(r, ngx_http_lua_module);
-
- /* balancer_by_lua does not support yielding and
- * there cannot be any conflicts among concurrent requests,
- * thus it is safe to store the peer data in the main conf.
- */
- lmcf->balancer_peer_data = bp;
+ pdata = r->upstream->peer.data;
+ r->upstream->peer.data = bp;
rc = lscf->balancer.handler(r, lscf, L);
+ r->upstream->peer.data = pdata;
+
if (rc == NGX_ERROR) {
return NGX_ERROR;
}
@@ -332,79 +490,88 @@ ngx_http_lua_balancer_get_peer(ngx_peer_connection_t *pc, void *data)
}
}
- if (bp->sockaddr && bp->socklen) {
+ if (ngx_http_lua_balancer_peer_set(bp)) {
pc->sockaddr = bp->sockaddr;
pc->socklen = bp->socklen;
+ pc->name = bp->host;
pc->cached = 0;
pc->connection = NULL;
- pc->name = bp->host;
-
- bp->rrp.peers->single = 0;
if (bp->more_tries) {
r->upstream->peer.tries += bp->more_tries;
}
- dd("tries: %d", (int) r->upstream->peer.tries);
-
- return NGX_OK;
- }
-
- return ngx_http_upstream_get_round_robin_peer(pc, &bp->rrp);
-}
+ if (ngx_http_lua_balancer_keepalive_is_enabled(bp)) {
+ ngx_http_lua_balancer_get_keepalive_pool(L, pc->log,
+ &bp->cpool_name,
+ &bp->cpool);
+ if (bp->cpool == NULL
+ && ngx_http_lua_balancer_create_keepalive_pool(L, pc->log,
+ &bp->cpool_name,
+ bp->cpool_size,
+ &bp->cpool)
+ != NGX_OK)
+ {
+ return NGX_ERROR;
+ }
-static ngx_int_t
-ngx_http_lua_balancer_by_chunk(lua_State *L, ngx_http_request_t *r)
-{
- u_char *err_msg;
- size_t len;
- ngx_int_t rc;
+ ngx_http_lua_assert(bp->cpool);
- /* init nginx context in Lua VM */
- ngx_http_lua_set_req(L, r);
+ if (!ngx_queue_empty(&bp->cpool->cache)) {
+ q = ngx_queue_head(&bp->cpool->cache);
-#ifndef OPENRESTY_LUAJIT
- ngx_http_lua_create_new_globals_table(L, 0 /* narr */, 1 /* nrec */);
+ item = ngx_queue_data(q, ngx_http_lua_balancer_keepalive_item_t,
+ queue);
+ c = item->connection;
- /* {{{ make new env inheriting main thread's globals table */
- lua_createtable(L, 0, 1 /* nrec */); /* the metatable for the new env */
- ngx_http_lua_get_globals_table(L);
- lua_setfield(L, -2, "__index");
- lua_setmetatable(L, -2); /* setmetatable({}, {__index = _G}) */
- /* }}} */
+ ngx_queue_remove(q);
+ ngx_queue_insert_head(&bp->cpool->free, q);
- lua_setfenv(L, -2); /* set new running env for the code closure */
-#endif /* OPENRESTY_LUAJIT */
+ c->idle = 0;
+ c->sent = 0;
+ c->log = pc->log;
+ c->read->log = pc->log;
+ c->write->log = pc->log;
+ c->pool->log = pc->log;
- lua_pushcfunction(L, ngx_http_lua_traceback);
- lua_insert(L, 1); /* put it under chunk and args */
+ if (c->read->timer_set) {
+ ngx_del_timer(c->read);
+ }
- /* protected call user code */
- rc = lua_pcall(L, 0, 1, 1);
+ pc->cached = 1;
+ pc->connection = c;
- lua_remove(L, 1); /* remove traceback function */
+ ngx_log_debug3(NGX_LOG_DEBUG_HTTP, pc->log, 0,
+ "lua balancer: keepalive reusing connection %p, "
+ "requests: %ui, cpool: %p",
+ c, c->requests, bp->cpool);
- dd("rc == %d", (int) rc);
+ return NGX_DONE;
+ }
- if (rc != 0) {
- /* error occurred when running loaded code */
- err_msg = (u_char *) lua_tolstring(L, -1, &len);
+ bp->cpool->connections++;
- if (err_msg == NULL) {
- err_msg = (u_char *) "unknown reason";
- len = sizeof("unknown reason") - 1;
+ ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0,
+ "lua balancer: keepalive no free connection, "
+ "cpool: %p", bp->cpool);
}
- ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
- "failed to run balancer_by_lua*: %*s", len, err_msg);
+ return NGX_OK;
+ }
- lua_settop(L, 0); /* clear remaining elems on stack */
+ rc = bp->original_get_peer(pc, bp->data);
+ if (rc == NGX_ERROR) {
+ return rc;
+ }
+
+ if (pc->sockaddr == ngx_http_lua_balancer_default_server_sockaddr) {
+ ngx_log_error(NGX_LOG_ERR, pc->log, 0,
+ "lua balancer: no peer set");
return NGX_ERROR;
}
- lua_settop(L, 0); /* clear remaining elems on stack */
return rc;
}
@@ -413,24 +580,354 @@ static void
ngx_http_lua_balancer_free_peer(ngx_peer_connection_t *pc, void *data,
ngx_uint_t state)
{
- ngx_http_lua_balancer_peer_data_t *bp = data;
+ ngx_queue_t *q;
+ ngx_connection_t *c;
+ ngx_http_upstream_t *u;
+ ngx_http_lua_balancer_keepalive_item_t *item;
+ ngx_http_lua_balancer_keepalive_pool_t *cpool;
+ ngx_http_lua_balancer_peer_data_t *bp = data;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0,
- "lua balancer free peer, tries: %ui", pc->tries);
+ "lua balancer: free peer, tries: %ui", pc->tries);
+
+ u = bp->request->upstream;
+ c = pc->connection;
- if (bp->sockaddr && bp->socklen) {
+ if (ngx_http_lua_balancer_peer_set(bp)) {
bp->last_peer_state = (int) state;
if (pc->tries) {
pc->tries--;
}
+ if (ngx_http_lua_balancer_keepalive_is_enabled(bp)) {
+ cpool = bp->cpool;
+
+ if (state & NGX_PEER_FAILED
+ || c == NULL
+ || c->read->eof
+ || c->read->error
+ || c->read->timedout
+ || c->write->error
+ || c->write->timedout)
+ {
+ goto invalid;
+ }
+
+ if (bp->keepalive_requests
+ && c->requests >= bp->keepalive_requests)
+ {
+ goto invalid;
+ }
+
+ if (!u->keepalive) {
+ goto invalid;
+ }
+
+ if (!u->request_body_sent) {
+ goto invalid;
+ }
+
+ if (ngx_terminate || ngx_exiting) {
+ goto invalid;
+ }
+
+ if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
+ goto invalid;
+ }
+
+ if (ngx_queue_empty(&cpool->free)) {
+ q = ngx_queue_last(&cpool->cache);
+ ngx_queue_remove(q);
+
+ item = ngx_queue_data(q, ngx_http_lua_balancer_keepalive_item_t,
+ queue);
+
+ ngx_http_lua_balancer_close(item->connection);
+
+ } else {
+ q = ngx_queue_head(&cpool->free);
+ ngx_queue_remove(q);
+
+ item = ngx_queue_data(q, ngx_http_lua_balancer_keepalive_item_t,
+ queue);
+ }
+
+ ngx_log_debug3(NGX_LOG_DEBUG_HTTP, pc->log, 0,
+ "lua balancer: keepalive saving connection %p, "
+ "cpool: %p, connections: %ui",
+ c, cpool, cpool->connections);
+
+ ngx_queue_insert_head(&cpool->cache, q);
+
+ item->connection = c;
+
+ pc->connection = NULL;
+
+ if (bp->keepalive_timeout) {
+ c->read->delayed = 0;
+ ngx_add_timer(c->read, bp->keepalive_timeout);
+
+ } else if (c->read->timer_set) {
+ ngx_del_timer(c->read);
+ }
+
+ if (c->write->timer_set) {
+ ngx_del_timer(c->write);
+ }
+
+ c->write->handler = ngx_http_lua_balancer_dummy_handler;
+ c->read->handler = ngx_http_lua_balancer_close_handler;
+
+ c->data = item;
+ c->idle = 1;
+ c->log = ngx_cycle->log;
+ c->read->log = ngx_cycle->log;
+ c->write->log = ngx_cycle->log;
+ c->pool->log = ngx_cycle->log;
+
+ if (c->read->ready) {
+ ngx_http_lua_balancer_close_handler(c->read);
+ }
+
+ return;
+
+invalid:
+
+ cpool->connections--;
+
+ ngx_log_debug3(NGX_LOG_DEBUG_HTTP, pc->log, 0,
+ "lua balancer: keepalive not saving connection %p, "
+ "cpool: %p, connections: %ui",
+ c, cpool, cpool->connections);
+
+ if (cpool->connections == 0) {
+ ngx_http_lua_balancer_free_keepalive_pool(pc->log, cpool);
+ }
+ }
+
+ return;
+ }
+
+ bp->original_free_peer(pc, bp->data, state);
+}
+
+
+static ngx_int_t
+ngx_http_lua_balancer_create_keepalive_pool(lua_State *L, ngx_log_t *log,
+ ngx_str_t *cpool_name, ngx_uint_t cpool_size,
+ ngx_http_lua_balancer_keepalive_pool_t **cpool)
+{
+ size_t size;
+ ngx_uint_t i;
+ ngx_http_lua_balancer_keepalive_pool_t *upool;
+ ngx_http_lua_balancer_keepalive_item_t *items;
+
+ /* get upstream connection pools table */
+ lua_pushlightuserdata(L, ngx_http_lua_lightudata_mask(
+ balancer_keepalive_pools_table_key));
+ lua_rawget(L, LUA_REGISTRYINDEX); /* pools? */
+
+ ngx_http_lua_assert(lua_istable(L, -1));
+
+ lua_pushlstring(L, (const char *)cpool_name->data, cpool_name->len);
+
+ size = sizeof(ngx_http_lua_balancer_keepalive_pool_t) +
+ sizeof(ngx_http_lua_balancer_keepalive_item_t) * cpool_size;
+
+ upool = lua_newuserdata(L, size + cpool_name->len); /* pools upool */
+ if (upool == NULL) {
+ return NGX_ERROR;
+ }
+
+ ngx_log_debug2(NGX_LOG_DEBUG_HTTP, log, 0,
+ "lua balancer: keepalive create pool, "
+ "name: %V, size: %ui",
+ cpool_name, cpool_size);
+
+ upool->lua_vm = L;
+ upool->size = cpool_size;
+ upool->connections = 0;
+
+ upool->cpool_name.len = cpool_name->len;
+ upool->cpool_name.data = (u_char *)(upool) + size;
+ ngx_memcpy(upool->cpool_name.data, cpool_name->data, cpool_name->len);
+
+ ngx_queue_init(&upool->cache);
+ ngx_queue_init(&upool->free);
+
+ lua_rawset(L, -3); /* pools */
+ lua_pop(L, 1); /* orig stack */
+
+ items = (ngx_http_lua_balancer_keepalive_item_t *) (&upool->free + 1);
+
+
+
+ for (i = 0; i < cpool_size; i++) {
+ ngx_queue_insert_head(&upool->free, &items[i].queue);
+ items[i].cpool = upool;
+ }
+
+ *cpool = upool;
+
+ return NGX_OK;
+}
+
+
+static void
+ngx_http_lua_balancer_get_keepalive_pool(lua_State *L,
+ ngx_log_t *log, ngx_str_t *cpool_name,
+ ngx_http_lua_balancer_keepalive_pool_t **cpool)
+{
+ ngx_http_lua_balancer_keepalive_pool_t *upool;
+
+ /* get upstream connection pools table */
+ lua_pushlightuserdata(L, ngx_http_lua_lightudata_mask(
+ balancer_keepalive_pools_table_key));
+ lua_rawget(L, LUA_REGISTRYINDEX); /* pools? */
+
+ if (lua_isnil(L, -1)) {
+ lua_pop(L, 1); /* orig stack */
+
+ /* create upstream connection pools table */
+ lua_createtable(L, 0, 0); /* pools */
+ lua_pushlightuserdata(L, ngx_http_lua_lightudata_mask(
+ balancer_keepalive_pools_table_key));
+ lua_pushvalue(L, -2); /* pools pools_table_key pools */
+ lua_rawset(L, LUA_REGISTRYINDEX); /* pools */
+ }
+
+ ngx_http_lua_assert(lua_istable(L, -1));
+
+ lua_pushlstring(L, (const char *)cpool_name->data, cpool_name->len);
+ lua_rawget(L, -2);
+
+ upool = lua_touserdata(L, -1);
+ lua_pop(L, 2); /* orig stack */
+
+ ngx_log_debug2(NGX_LOG_DEBUG_HTTP, log, 0,
+ "lua balancer: keepalive get pool, "
+ "name: %V, cpool: %p",
+ cpool_name, upool);
+
+ *cpool = upool;
+}
+
+
+static void
+ngx_http_lua_balancer_free_keepalive_pool(ngx_log_t *log,
+ ngx_http_lua_balancer_keepalive_pool_t *cpool)
+{
+ lua_State *L;
+
+ ngx_http_lua_assert(cpool->connections == 0);
+
+ L = cpool->lua_vm;
+
+ /* get upstream connection pools table */
+ lua_pushlightuserdata(L, ngx_http_lua_lightudata_mask(
+ balancer_keepalive_pools_table_key));
+ lua_rawget(L, LUA_REGISTRYINDEX); /* pools? */
+
+ if (lua_isnil(L, -1)) {
+ lua_pop(L, 1); /* orig stack */
+ return;
+ }
+
+ ngx_http_lua_assert(lua_istable(L, -1));
+
+ lua_pushlstring(L, (const char *)cpool->cpool_name.data, cpool->cpool_name.len);
+ lua_pushnil(L); /* pools nil */
+ lua_rawset(L, -3); /* pools */
+
+ ngx_log_debug2(NGX_LOG_DEBUG_HTTP, log, 0,
+ "lua balancer: keepalive free pool, "
+ "name: %V, cpool: %p",
+ &cpool->cpool_name, cpool);
+
+ lua_pop(L, 1); /* orig stack */
+}
+
+
+static void
+ngx_http_lua_balancer_close(ngx_connection_t *c)
+{
+ ngx_http_lua_balancer_keepalive_item_t *item;
+
+ item = c->data;
+
+#if (NGX_HTTP_SSL)
+ if (c->ssl) {
+ c->ssl->no_wait_shutdown = 1;
+ c->ssl->no_send_shutdown = 1;
+
+ if (ngx_ssl_shutdown(c) == NGX_AGAIN) {
+ c->ssl->handler = ngx_http_lua_balancer_close;
+ return;
+ }
+ }
+#endif
+
+ ngx_destroy_pool(c->pool);
+ ngx_close_connection(c);
+
+ item->cpool->connections--;
+
+ ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0,
+ "lua balancer: keepalive closing connection %p, cpool: %p, "
+ "connections: %ui",
+ c, item->cpool, item->cpool->connections);
+}
+
+
+static void
+ngx_http_lua_balancer_dummy_handler(ngx_event_t *ev)
+{
+ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ev->log, 0,
+ "lua balancer: dummy handler");
+}
+
+
+static void
+ngx_http_lua_balancer_close_handler(ngx_event_t *ev)
+{
+ ngx_http_lua_balancer_keepalive_item_t *item;
+
+ int n;
+ char buf[1];
+ ngx_connection_t *c;
+
+ c = ev->data;
+
+ if (c->close || c->read->timedout) {
+ goto close;
+ }
+
+ n = recv(c->fd, buf, 1, MSG_PEEK);
+
+ if (n == -1 && ngx_socket_errno == NGX_EAGAIN) {
+ ev->ready = 0;
+
+ if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
+ goto close;
+ }
+
return;
}
- /* fallback */
+close:
+
+ item = c->data;
+ c->log = ev->log;
- ngx_http_upstream_free_round_robin_peer(pc, data, state);
+ ngx_http_lua_balancer_close(c);
+
+ ngx_queue_remove(&item->queue);
+ ngx_queue_insert_head(&item->cpool->free, &item->queue);
+
+ if (item->cpool->connections == 0) {
+ ngx_http_lua_balancer_free_keepalive_pool(ev->log, item->cpool);
+ }
}
@@ -441,12 +938,12 @@ ngx_http_lua_balancer_set_session(ngx_peer_connection_t *pc, void *data)
{
ngx_http_lua_balancer_peer_data_t *bp = data;
- if (bp->sockaddr && bp->socklen) {
+ if (ngx_http_lua_balancer_peer_set(bp)) {
/* TODO */
return NGX_OK;
}
- return ngx_http_upstream_set_round_robin_peer_session(pc, &bp->rrp);
+ return bp->original_set_session(pc, bp->data);
}
@@ -455,13 +952,12 @@ ngx_http_lua_balancer_save_session(ngx_peer_connection_t *pc, void *data)
{
ngx_http_lua_balancer_peer_data_t *bp = data;
- if (bp->sockaddr && bp->socklen) {
+ if (ngx_http_lua_balancer_peer_set(bp)) {
/* TODO */
return;
}
- ngx_http_upstream_save_round_robin_peer_session(pc, &bp->rrp);
- return;
+ bp->original_save_session(pc, bp->data);
}
#endif
@@ -469,14 +965,14 @@ ngx_http_lua_balancer_save_session(ngx_peer_connection_t *pc, void *data)
int
ngx_http_lua_ffi_balancer_set_current_peer(ngx_http_request_t *r,
- const u_char *addr, size_t addr_len, int port, char **err)
+ const u_char *addr, size_t addr_len, int port,
+ const u_char *cpool_name, size_t cpool_name_len,
+ unsigned int cpool_size, char **err)
{
- ngx_url_t url;
- ngx_http_lua_ctx_t *ctx;
- ngx_http_upstream_t *u;
-
- ngx_http_lua_main_conf_t *lmcf;
- ngx_http_lua_balancer_peer_data_t *bp;
+ ngx_url_t url;
+ ngx_http_upstream_t *u;
+ ngx_http_lua_ctx_t *ctx;
+ ngx_http_lua_balancer_peer_data_t *bp;
if (r == NULL) {
*err = "no request found";
@@ -501,18 +997,6 @@ ngx_http_lua_ffi_balancer_set_current_peer(ngx_http_request_t *r,
return NGX_ERROR;
}
- lmcf = ngx_http_get_module_main_conf(r, ngx_http_lua_module);
-
- /* we cannot read r->upstream->peer.data here directly because
- * it could be overridden by other modules like
- * ngx_http_upstream_keepalive_module.
- */
- bp = lmcf->balancer_peer_data;
- if (bp == NULL) {
- *err = "no upstream peer data found";
- return NGX_ERROR;
- }
-
ngx_memzero(&url, sizeof(ngx_url_t));
url.url.data = ngx_palloc(r->pool, addr_len);
@@ -536,6 +1020,8 @@ ngx_http_lua_ffi_balancer_set_current_peer(ngx_http_request_t *r,
return NGX_ERROR;
}
+ bp = (ngx_http_lua_balancer_peer_data_t *) u->peer.data;
+
if (url.addrs && url.addrs[0].sockaddr) {
bp->sockaddr = url.addrs[0].sockaddr;
bp->socklen = url.addrs[0].socklen;
@@ -546,6 +1032,72 @@ ngx_http_lua_ffi_balancer_set_current_peer(ngx_http_request_t *r,
return NGX_ERROR;
}
+ if (cpool_name_len == 0) {
+ bp->cpool_name = *bp->host;
+
+ } else {
+ bp->cpool_name.data = ngx_palloc(r->pool, cpool_name_len);
+ if (bp->cpool_name.data == NULL) {
+ *err = "no memory";
+ return NGX_ERROR;
+ }
+
+ ngx_memcpy(bp->cpool_name.data, cpool_name, cpool_name_len);
+ bp->cpool_name.len = cpool_name_len;
+ }
+
+ bp->cpool_size = (ngx_uint_t) cpool_size;
+