/**
* swap the server connection with a connection from
* the connection pool
*
* we can only switch backends if we have a authed connection in the pool.
*
* @return NULL if swapping failed
* the new backend on success
*/
network_socket *network_connection_pool_lua_swap(network_mysqld_con *con, int backend_ndx, GHashTable *pwd_table) {
network_backend_t *backend = NULL;
network_socket *send_sock;
network_mysqld_con_lua_t *st = con->plugin_con_state;
// GString empty_username = { "", 0, 0 };
/*
* we can only change to another backend if the backend is already
* in the connection pool and connected
*/
backend = network_backends_get(con->srv->backends, backend_ndx);
if (!backend) return NULL;
/**
* get a connection from the pool which matches our basic requirements
* - username has to match
* - default_db should match
*/
#ifdef DEBUG_CONN_POOL
g_debug("%s: (swap) check if we have a connection for this user in the pool '%s'", G_STRLOC, con->client->response ? con->client->response->username->str: "empty_user");
#endif
int flag = 0;
network_connection_pool* pool = chassis_event_thread_pool(backend);
if (NULL == (send_sock = network_connection_pool_get(pool))) {
/**
* no connections in the pool
*/
flag = 1;
if (NULL == (send_sock = self_connect(con, backend, pwd_table))) {
st->backend_ndx = -1;
return NULL;
}
}
/* the backend is up and cool, take and move the current backend into the pool */
#ifdef DEBUG_CONN_POOL
g_debug("%s: (swap) added the previous connection to the pool", G_STRLOC);
#endif
// network_connection_pool_lua_add_connection(con);
/* connect to the new backend */
st->backend = backend;
// st->backend->connected_clients++;
st->backend_ndx = backend_ndx;
if (flag == 0 && !g_atomic_int_compare_and_exchange(&st->backend->connected_clients, 0, 0)) {
g_atomic_int_dec_and_test(&st->backend->connected_clients);
//g_critical("pool_lua_swap:%08x's connected_clients is %d\n", backend, backend->connected_clients);
}
return send_sock;
}
int backend_load_balance_get(network_mysqld_con* con) {
int ret = -1;
gint i, load_value, count, flag = 0;
double cv, connect_value;
network_backend_t* backend;
network_connection_pool* pool;
if(con->config->max_connections == 0) return ret;
network_backends_t* backends = con->srv->priv->backends;
count = network_backends_count(backends);
load_value = con->config->max_connections;
for(i = 0; i < count; i++) {
backend = network_backends_get(backends, i);
if (backend == NULL) continue;
pool = chassis_event_thread_pool(backend);
if (pool == NULL) continue;
if (backend->type == BACKEND_TYPE_RO && backend->state == BACKEND_STATE_UP && backend->connected_clients >= load_value) {
flag = 1;
connect_value = backend->connected_clients / (double)backend->weight;
break;
}
}
if(flag == 0) return ret;
for(i = 0; i < count; i++) {
backend = network_backends_get(backends, i);
if (backend == NULL) continue;
pool = chassis_event_thread_pool(backend);
if (pool == NULL) continue;
if (backend->type == BACKEND_TYPE_RO && backend->state == BACKEND_STATE_UP) {
cv = backend->connected_clients / (double)backend->weight;
if(cv <= connect_value) {
ret = i;
connect_value = cv;
}
}
}
return ret;
}
/**
* swap the server connection with a connection from
* the connection pool
*
* we can only switch backends if we have a authed connection in the pool.
*
* @return NULL if swapping failed
* the new backend on success
*/
network_socket *network_connection_pool_lua_swap(network_mysqld_con *con, int backend_ndx) {
network_backend_t *backend = NULL;
network_socket *send_sock;
network_mysqld_con_lua_t *st = con->plugin_con_state;
chassis_private *g = con->srv->priv;
// GString empty_username = { "", 0, 0 };
/*
* we can only change to another backend if the backend is already
* in the connection pool and connected
*/
backend = network_backends_get(g->backends, backend_ndx);
if (!backend) return NULL;
/**
* get a connection from the pool which matches our basic requirements
* - username has to match
* - default_db should match
*/
#ifdef DEBUG_CONN_POOL
g_debug("%s: (swap) check if we have a connection for this user in the pool '%s'", G_STRLOC, con->client->response ? con->client->response->username->str: "empty_user");
#endif
network_connection_pool* pool = chassis_event_thread_pool(backend);
if (NULL == (send_sock = network_connection_pool_get(pool))) {
/**
* no connections in the pool
*/
if (NULL == (send_sock = self_connect(con, backend))) {
st->backend_ndx = -1;
return NULL;
}
}
/* the backend is up and cool, take and move the current backend into the pool */
#ifdef DEBUG_CONN_POOL
g_debug("%s: (swap) added the previous connection to the pool", G_STRLOC);
#endif
// network_connection_pool_lua_add_connection(con);
/* connect to the new backend */
st->backend = backend;
// st->backend->connected_clients++;
st->backend_ndx = backend_ndx;
return send_sock;
}
/**
* get proxy.global.backends[ndx]
*
* get the backend from the array of mysql backends.
*
* @return nil or the backend
* @see proxy_backend_get
*/
static int proxy_backends_get(lua_State *L) {
network_backend_t *backend;
network_backend_t **backend_p;
network_backends_t *bs = *(network_backends_t **)luaL_checkself(L);
int backend_ndx = luaL_checkinteger(L, 2) - 1; /** lua is indexes from 1, C from 0 */
/* check that we are in range for a _int_ */
if (NULL == (backend = network_backends_get(bs, backend_ndx))) {
lua_pushnil(L);
return 1;
}
backend_p = lua_newuserdata(L, sizeof(backend)); /* the table underneath proxy.global.backends[ndx] */
*backend_p = backend;
network_backend_lua_getmetatable(L);
lua_setmetatable(L, -2);
return 1;
}
int idle_rw(network_mysqld_con* con) {
int ret = -1;
guint i;
network_backends_t* backends = con->srv->priv->backends;
guint count = network_backends_count(backends);
for (i = 0; i < count; ++i) {
network_backend_t* backend = network_backends_get(backends, i);
if (backend == NULL) continue;
network_connection_pool* pool = chassis_event_thread_pool(backend);
if (pool == NULL) continue;
if (backend->type == BACKEND_TYPE_RW && backend->state == BACKEND_STATE_UP) {
ret = i;
break;
}
}
return ret;
}
int idle_ro(network_mysqld_con* con) {
int max_conns = -1;
guint i;
network_backends_t* backends = con->srv->priv->backends;
guint count = network_backends_count(backends);
for(i = 0; i < count; ++i) {
network_backend_t* backend = network_backends_get(backends, i);
if (backend == NULL) continue;
network_connection_pool* pool = chassis_event_thread_pool(backend);
if (pool == NULL) continue;
if (backend->type == BACKEND_TYPE_RO && backend->state == BACKEND_STATE_UP) {
if (max_conns == -1 || backend->connected_clients < max_conns) {
max_conns = backend->connected_clients;
}
}
}
return max_conns;
}
int wrr_ro(network_mysqld_con *con) {
guint i, j;
network_backends_t* backends = con->srv->priv->backends;
g_wrr_poll* rwsplit = backends->global_wrr;
guint ndx_num = network_backends_count(backends);
if (rwsplit->next_ndx >= ndx_num)
rwsplit->next_ndx = 0;
gint backend_ndx = backend_load_balance_get(con);
if(0 < backend_ndx) return backend_ndx;
// set max weight if no init
if (rwsplit->max_weight == 0) {
for(i = 0; i < ndx_num; ++i) {
network_backend_t* backend = network_backends_get(backends, i);
if (backend == NULL || backend->state != BACKEND_STATE_UP) continue;
if (rwsplit->max_weight < backend->weight) {
rwsplit->max_weight = backend->weight;
rwsplit->cur_weight = backend->weight;
}
}
}
guint max_weight = rwsplit->max_weight;
gint cur_weight = rwsplit->cur_weight;
guint next_ndx = rwsplit->next_ndx;
// get backend index by slave wrr
gint ndx = -1;
for(i = 0; i < ndx_num; ++i) {
network_backend_t* backend = network_backends_get(backends, next_ndx);
if (backend == NULL) goto next;
network_connection_pool* pool = chassis_event_thread_pool(backend);
if (pool == NULL) goto next;
if (backend->type == BACKEND_TYPE_RO && backend->weight >= cur_weight) {
if(backend->state == BACKEND_STATE_UP) {
ndx = next_ndx;
}else {
for(j = 0; j < ndx_num; ++j) {
network_backend_t* b = network_backends_get(backends, j);
if(b == NULL) continue;
network_connection_pool* p = chassis_event_thread_pool(b);
if(p == NULL) continue;
if(b->type == BACKEND_TYPE_RO && b->state == BACKEND_STATE_UP) ndx = j;
}
}
}
next:
if (next_ndx >= ndx_num - 1) {
--cur_weight;
next_ndx = 0;
if (cur_weight <= 0) cur_weight = max_weight;
} else {
++next_ndx;
}
if (ndx != -1) break;
}
rwsplit->cur_weight = cur_weight;
rwsplit->next_ndx = next_ndx;
return ndx;
}
/**
* swap the server connection with a connection from
* the connection pool
*
* we can only switch backends if we have a authed connection in the pool.
*
* @return NULL if swapping failed
* the new backend on success
*/
network_socket* network_connection_pool_lua_swap(network_mysqld_con *con, int backend_ndx, int need_keep_conn, int *err) {
network_backend_t *backend = NULL;
network_socket *send_sock;
network_connection_pool *pool, *second_pool;
network_mysqld_con_lua_t *st = con->plugin_con_state;
chassis_private *g = con->srv->priv;
/*
* we can only change to another backend if the backend is already
* in the connection pool and connected
*/
backend = network_backends_get(g->backends, backend_ndx);
if (!backend) return NULL;
/**
* get a connection from the pool which matches our basic requirements
* - username has to match
* - default_db should match
*/
#ifdef DEBUG_CONN_POOL
g_debug("%s: (swap) check if we have a connection for this user in the pool '%s'", G_STRLOC, con->client->response ? con->client->response->username->str: "empty_user");
#endif
if(need_keep_conn == 0) {
pool = chassis_event_thread_pool(backend);
send_sock = network_connection_pool_get(pool);
if(send_sock == NULL) {
second_pool = chassis_event_thread_secondpool(backend);
send_sock = network_expiretime_connection_pool_get(second_pool, con);
}
}else {
second_pool = chassis_event_thread_secondpool(backend);
send_sock = network_connection_secondpool_get(second_pool, con);
if(send_sock == NULL) g_message("%s:the connection need keep, but it's not in the pool now.", G_STRLOC);
}
if (NULL == send_sock ) {
/**
* no connections in the pool
*/
if ((con->config->max_connections <= 0) || (backend->connected_clients < con->config->max_connections)) {
if (NULL == (send_sock = self_connect(con, backend))) {
st->backend_ndx = -1;
return NULL;
}
} else {
st->backend_ndx = -1;
*err = -1;
return NULL;
}
}
/* the backend is up and cool, take and move the current backend into the pool */
#ifdef DEBUG_CONN_POOL
g_debug("%s: (swap) added the previous connection to the pool", G_STRLOC);
#endif
/* connect to the new backend */
st->backend = backend;
g_atomic_int_inc(&(st->backend->connected_clients));
st->backend_ndx = backend_ndx;
return send_sock;
}
/**
* 测试zabbix没有启动的情况
* @return
*/
void test_admin_backend_mange_Add(void) {
/** 初始化内存变量*/
network_backend_t *b = NULL;
chassis *srv1 = g_new0(chassis, 1);
srv1->priv = g_new0(chassis_private, 1);
srv1->priv->backends = network_backends_new();
srv1->xml_filename = "test_config.xml";
network_backends_add(srv1->priv->backends, "X.X.X.X:3306#2#UP", BACKEND_TYPE_RW);
b = network_backends_get(srv1->priv->backends, 0);
g_mutex_init(&(b->mutex[0]));
g_mutex_init(&(b->mutex[1]));
network_backends_add(srv1->priv->backends, "X.X.X.X:3306#3#UP", BACKEND_TYPE_RO);
b = network_backends_get(srv1->priv->backends, 1);
g_mutex_init(&(b->mutex[0]));
g_mutex_init(&(b->mutex[1]));
network_mysqld_con *con = network_mysqld_con_new();
con->client = network_socket_new();
con->srv = srv1;
con->srv->detect_threads = g_ptr_array_new();
//network_mysqld_add_connection(srv1, con);
gchar *cmd = g_strdup("addBackend --backend=X.X.X.X:3306");
g_assert_cmpint(COMMAND_PROCESS_ERROR, ==, admin_command_process(con, cmd));
g_free(cmd);
cmd = NULL;
cmd = g_strdup("addBackend");
g_assert_cmpint(COMMAND_PROCESS_ERROR, ==, admin_command_process(con, cmd));
g_free(cmd);
cmd = NULL;
g_assert(COMMAND_NO_QUERY_SPECIFIED == admin_command_process(con, NULL));
cmd = g_strdup("addBackend --backend=X.X.X.X:3307");
g_assert(COMMAND_PROCESS_ERROR == admin_command_process(con, cmd));
g_free(cmd);
cmd = NULL;
cmd = g_strdup("addBackend --backend=X.X.X.X:3307#1#up --bktype=rw");
g_assert(COMMAND_PROCESS_ERROR == admin_command_process(con, cmd));
g_free(cmd);
cmd = NULL;
cmd = g_strdup("addBackend --backend=X.X.X.X:3307 --bktype=ro");
g_assert(COMMAND_PROCESS_SUCCESS == admin_command_process(con, cmd));
network_backend_t *backend = network_backends_get_by_name(srv1->priv->backends, "X.X.X.X:3307");
g_assert(backend);
g_free(cmd);
cmd = NULL;
cmd = g_strdup("addBackend --backend=192.1968.x.xx:3308");
g_assert(COMMAND_PROCESS_ERROR == admin_command_process(con, cmd));
g_free(cmd);
cmd = NULL;
cmd = g_strdup("addBackend --backends=X.X.X.X:3308");
g_assert(COMMAND_PROCESS_ERROR == admin_command_process(con, cmd));
g_free(cmd);
cmd = NULL;
cmd = g_strdup("addBackend --backend=X.X.X.X:103307");
g_assert(COMMAND_PROCESS_ERROR == admin_command_process(con, cmd));
g_free(cmd);
cmd = NULL;
cmd = g_strdup("addBackends --backend=X.X.X.X:3308");
g_assert(COMMAND_NOT_SUPPORT == admin_command_process(con, cmd));
g_free(cmd);
cmd = NULL;
// g_ptr_array_free(con->srv->detect_threads, TRUE);
// con->srv->detect_threads = NULL;
//network_mysqld_con_free(con);
//con = NULL;
//network_backends_free(srv1->priv->backends);
//srv1->priv->backends = NULL;
//g_free(srv1->priv);
//srv1->priv = NULL;
//g_free(srv1);
//srv1 = NULL;
}
void test_adjust_backend(void) {
network_backend_t *b = NULL;
guint health = 0;
network_backends_add(srv1->priv->backends, "192.168.x.x:3306#2#UN", BACKEND_TYPE_RO);
network_backends_add(srv1->priv->backends, "192.168.x.x:3306#4#UN", BACKEND_TYPE_RO);
network_backends_add(srv1->priv->backends, "192.168.x.x:3306#1#UN", BACKEND_TYPE_RO);
b = network_backends_get(srv1->priv->backends, 0);
adjust_backend(BACKEND_STATE_UP, srv1, b);
g_assert_cmpint(b->state, ==, BACKEND_STATE_UP);
health = b->health_check.rise + b->health_check.fall - 1;
g_assert_cmpint(b->health_check.health, == , health);
g_assert_cmpint(b->type, ==, BACKEND_TYPE_RW);
adjust_backend(BACKEND_STATE_DOWN, srv1, b);
g_assert_cmpint(b->state, ==, BACKEND_STATE_UP);
health--;
g_assert_cmpint(b->health_check.health, == , health);
g_assert_cmpint(b->type, ==, BACKEND_TYPE_RW);
adjust_backend(BACKEND_STATE_UP, srv1, b);
g_assert_cmpint(b->state, ==, BACKEND_STATE_UP);
health = b->health_check.rise + b->health_check.fall - 1;
g_assert_cmpint(b->health_check.health, == , health);
g_assert_cmpint(b->type, ==, BACKEND_TYPE_RW);
adjust_backend(BACKEND_STATE_DOWN, srv1, b);
g_assert_cmpint(b->state, ==, BACKEND_STATE_UP);
health--;
g_assert_cmpint(b->health_check.health, == , health);
g_assert_cmpint(b->type, ==, BACKEND_TYPE_RW);
adjust_backend(BACKEND_STATE_DOWN, srv1, b);
g_assert_cmpint(b->state, ==, BACKEND_STATE_UP);
health--;
g_assert_cmpint(b->health_check.health, == , health);
g_assert_cmpint(b->type, ==, BACKEND_TYPE_RW);
adjust_backend(BACKEND_STATE_DOWN, srv1, b);
g_assert_cmpint(b->state, ==, BACKEND_STATE_DOWN);
health = 0;
g_assert_cmpint(b->health_check.health, == , health);
g_assert_cmpint(b->type, ==, BACKEND_TYPE_RO);
adjust_backend(BACKEND_STATE_UP, srv1, b);
g_assert_cmpint(b->state, ==, BACKEND_STATE_DOWN);
health++;
g_assert_cmpint(b->health_check.health, == , health);
g_assert_cmpint(b->type, ==, BACKEND_TYPE_RO);
adjust_backend(BACKEND_STATE_DOWN, srv1, b);
g_assert_cmpint(b->state, ==, BACKEND_STATE_DOWN);
health = 0;
g_assert_cmpint(b->health_check.health, == , health);
g_assert_cmpint(b->type, ==, BACKEND_TYPE_RO);
adjust_backend(BACKEND_STATE_UP, srv1, b);
g_assert_cmpint(b->state, ==, BACKEND_STATE_DOWN);
health++;
g_assert_cmpint(b->health_check.health, == , health);
g_assert_cmpint(b->type, ==, BACKEND_TYPE_RO);
adjust_backend(BACKEND_STATE_UP, srv1, b);
g_assert_cmpint(b->state, ==, BACKEND_STATE_UP);
health = b->health_check.rise + b->health_check.fall - 1;
g_assert_cmpint(b->health_check.health, == , health);
g_assert_cmpint(b->type, ==, BACKEND_TYPE_RW);
network_backends_free(srv1->priv->backends);
srv1->priv->backends = NULL;
}