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src/stream/ngx_stream_upstream.c - nginx source code
Global variables defined
Functions defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_stream.h>
- static ngx_int_t ngx_stream_upstream_add_variables(ngx_conf_t *cf);
- static ngx_int_t ngx_stream_upstream_addr_variable(ngx_stream_session_t *s,
- ngx_stream_variable_value_t *v, uintptr_t data);
- static ngx_int_t ngx_stream_upstream_response_time_variable(
- ngx_stream_session_t *s, ngx_stream_variable_value_t *v, uintptr_t data);
- static ngx_int_t ngx_stream_upstream_bytes_variable(ngx_stream_session_t *s,
- ngx_stream_variable_value_t *v, uintptr_t data);
- static char *ngx_stream_upstream(ngx_conf_t *cf, ngx_command_t *cmd,
- void *dummy);
- static char *ngx_stream_upstream_server(ngx_conf_t *cf, ngx_command_t *cmd,
- void *conf);
- #if (NGX_STREAM_UPSTREAM_ZONE)
- static char *ngx_stream_upstream_resolver(ngx_conf_t *cf, ngx_command_t *cmd,
- void *conf);
- #endif
- static void *ngx_stream_upstream_create_main_conf(ngx_conf_t *cf);
- static char *ngx_stream_upstream_init_main_conf(ngx_conf_t *cf, void *conf);
- static ngx_command_t ngx_stream_upstream_commands[] = {
- { ngx_string("upstream"),
- NGX_STREAM_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE1,
- ngx_stream_upstream,
- 0,
- 0,
- NULL },
- { ngx_string("server"),
- NGX_STREAM_UPS_CONF|NGX_CONF_1MORE,
- ngx_stream_upstream_server,
- NGX_STREAM_SRV_CONF_OFFSET,
- 0,
- NULL },
- #if (NGX_STREAM_UPSTREAM_ZONE)
- { ngx_string("resolver"),
- NGX_STREAM_UPS_CONF|NGX_CONF_1MORE,
- ngx_stream_upstream_resolver,
- NGX_STREAM_SRV_CONF_OFFSET,
- 0,
- NULL },
- { ngx_string("resolver_timeout"),
- NGX_STREAM_UPS_CONF|NGX_CONF_TAKE1,
- ngx_conf_set_msec_slot,
- NGX_STREAM_SRV_CONF_OFFSET,
- offsetof(ngx_stream_upstream_srv_conf_t, resolver_timeout),
- NULL },
- #endif
- ngx_null_command
- };
- static ngx_stream_module_t ngx_stream_upstream_module_ctx = {
- ngx_stream_upstream_add_variables,
- NULL,
- ngx_stream_upstream_create_main_conf,
- ngx_stream_upstream_init_main_conf,
- NULL,
- NULL
- };
- ngx_module_t ngx_stream_upstream_module = {
- NGX_MODULE_V1,
- &ngx_stream_upstream_module_ctx,
- ngx_stream_upstream_commands,
- NGX_STREAM_MODULE,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NGX_MODULE_V1_PADDING
- };
- static ngx_stream_variable_t ngx_stream_upstream_vars[] = {
- { ngx_string("upstream_addr"), NULL,
- ngx_stream_upstream_addr_variable, 0,
- NGX_STREAM_VAR_NOCACHEABLE, 0 },
- { ngx_string("upstream_bytes_sent"), NULL,
- ngx_stream_upstream_bytes_variable, 0,
- NGX_STREAM_VAR_NOCACHEABLE, 0 },
- { ngx_string("upstream_connect_time"), NULL,
- ngx_stream_upstream_response_time_variable, 2,
- NGX_STREAM_VAR_NOCACHEABLE, 0 },
- { ngx_string("upstream_first_byte_time"), NULL,
- ngx_stream_upstream_response_time_variable, 1,
- NGX_STREAM_VAR_NOCACHEABLE, 0 },
- { ngx_string("upstream_session_time"), NULL,
- ngx_stream_upstream_response_time_variable, 0,
- NGX_STREAM_VAR_NOCACHEABLE, 0 },
- { ngx_string("upstream_bytes_received"), NULL,
- ngx_stream_upstream_bytes_variable, 1,
- NGX_STREAM_VAR_NOCACHEABLE, 0 },
- ngx_stream_null_variable
- };
- static ngx_int_t
- ngx_stream_upstream_add_variables(ngx_conf_t *cf)
- {
- ngx_stream_variable_t *var, *v;
- for (v = ngx_stream_upstream_vars; v->name.len; v++) {
- var = ngx_stream_add_variable(cf, &v->name, v->flags);
- if (var == NULL) {
- return NGX_ERROR;
- }
- var->get_handler = v->get_handler;
- var->data = v->data;
- }
- return NGX_OK;
- }
- static ngx_int_t
- ngx_stream_upstream_addr_variable(ngx_stream_session_t *s,
- ngx_stream_variable_value_t *v, uintptr_t data)
- {
- u_char *p;
- size_t len;
- ngx_uint_t i;
- ngx_stream_upstream_state_t *state;
- v->valid = 1;
- v->no_cacheable = 0;
- v->not_found = 0;
- if (s->upstream_states == NULL || s->upstream_states->nelts == 0) {
- v->not_found = 1;
- return NGX_OK;
- }
- len = 0;
- state = s->upstream_states->elts;
- for (i = 0; i < s->upstream_states->nelts; i++) {
- if (state[i].peer) {
- len += state[i].peer->len;
- }
- len += 2;
- }
- p = ngx_pnalloc(s->connection->pool, len);
- if (p == NULL) {
- return NGX_ERROR;
- }
- v->data = p;
- i = 0;
- for ( ;; ) {
- if (state[i].peer) {
- p = ngx_cpymem(p, state[i].peer->data, state[i].peer->len);
- }
- if (++i == s->upstream_states->nelts) {
- break;
- }
- *p++ = ',';
- *p++ = ' ';
- }
- v->len = p - v->data;
- return NGX_OK;
- }
- static ngx_int_t
- ngx_stream_upstream_bytes_variable(ngx_stream_session_t *s,
- ngx_stream_variable_value_t *v, uintptr_t data)
- {
- u_char *p;
- size_t len;
- ngx_uint_t i;
- ngx_stream_upstream_state_t *state;
- v->valid = 1;
- v->no_cacheable = 0;
- v->not_found = 0;
- if (s->upstream_states == NULL || s->upstream_states->nelts == 0) {
- v->not_found = 1;
- return NGX_OK;
- }
- len = s->upstream_states->nelts * (NGX_OFF_T_LEN + 2);
- p = ngx_pnalloc(s->connection->pool, len);
- if (p == NULL) {
- return NGX_ERROR;
- }
- v->data = p;
- i = 0;
- state = s->upstream_states->elts;
- for ( ;; ) {
- if (data == 1) {
- p = ngx_sprintf(p, "%O", state[i].bytes_received);
- } else {
- p = ngx_sprintf(p, "%O", state[i].bytes_sent);
- }
- if (++i == s->upstream_states->nelts) {
- break;
- }
- *p++ = ',';
- *p++ = ' ';
- }
- v->len = p - v->data;
- return NGX_OK;
- }
- static ngx_int_t
- ngx_stream_upstream_response_time_variable(ngx_stream_session_t *s,
- ngx_stream_variable_value_t *v, uintptr_t data)
- {
- u_char *p;
- size_t len;
- ngx_uint_t i;
- ngx_msec_int_t ms;
- ngx_stream_upstream_state_t *state;
- v->valid = 1;
- v->no_cacheable = 0;
- v->not_found = 0;
- if (s->upstream_states == NULL || s->upstream_states->nelts == 0) {
- v->not_found = 1;
- return NGX_OK;
- }
- len = s->upstream_states->nelts * (NGX_TIME_T_LEN + 4 + 2);
- p = ngx_pnalloc(s->connection->pool, len);
- if (p == NULL) {
- return NGX_ERROR;
- }
- v->data = p;
- i = 0;
- state = s->upstream_states->elts;
- for ( ;; ) {
- if (data == 1) {
- ms = state[i].first_byte_time;
- } else if (data == 2) {
- ms = state[i].connect_time;
- } else {
- ms = state[i].response_time;
- }
- if (ms != -1) {
- ms = ngx_max(ms, 0);
- p = ngx_sprintf(p, "%T.%03M", (time_t) ms / 1000, ms % 1000);
- } else {
- *p++ = '-';
- }
- if (++i == s->upstream_states->nelts) {
- break;
- }
- *p++ = ',';
- *p++ = ' ';
- }
- v->len = p - v->data;
- return NGX_OK;
- }
- static char *
- ngx_stream_upstream(ngx_conf_t *cf, ngx_command_t *cmd, void *dummy)
- {
- char *rv;
- void *mconf;
- ngx_str_t *value;
- ngx_url_t u;
- ngx_uint_t m;
- ngx_conf_t pcf;
- ngx_stream_module_t *module;
- ngx_stream_conf_ctx_t *ctx, *stream_ctx;
- ngx_stream_upstream_srv_conf_t *uscf;
- ngx_memzero(&u, sizeof(ngx_url_t));
- value = cf->args->elts;
- u.host = value[1];
- u.no_resolve = 1;
- u.no_port = 1;
- uscf = ngx_stream_upstream_add(cf, &u, NGX_STREAM_UPSTREAM_CREATE
- |NGX_STREAM_UPSTREAM_MODIFY
- |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);
- if (uscf == NULL) {
- return NGX_CONF_ERROR;
- }
- ctx = ngx_pcalloc(cf->pool, sizeof(ngx_stream_conf_ctx_t));
- if (ctx == NULL) {
- return NGX_CONF_ERROR;
- }
- stream_ctx = cf->ctx;
- ctx->main_conf = stream_ctx->main_conf;
-
- ctx->srv_conf = ngx_pcalloc(cf->pool,
- sizeof(void *) * ngx_stream_max_module);
- if (ctx->srv_conf == NULL) {
- return NGX_CONF_ERROR;
- }
- ctx->srv_conf[ngx_stream_upstream_module.ctx_index] = uscf;
- uscf->srv_conf = ctx->srv_conf;
- for (m = 0; cf->cycle->modules[m]; m++) {
- if (cf->cycle->modules[m]->type != NGX_STREAM_MODULE) {
- continue;
- }
- module = cf->cycle->modules[m]->ctx;
- if (module->create_srv_conf) {
- mconf = module->create_srv_conf(cf);
- if (mconf == NULL) {
- return NGX_CONF_ERROR;
- }
- ctx->srv_conf[cf->cycle->modules[m]->ctx_index] = mconf;
- }
- }
- uscf->servers = ngx_array_create(cf->pool, 4,
- sizeof(ngx_stream_upstream_server_t));
- if (uscf->servers == NULL) {
- return NGX_CONF_ERROR;
- }
-
- pcf = *cf;
- cf->ctx = ctx;
- cf->cmd_type = NGX_STREAM_UPS_CONF;
- rv = ngx_conf_parse(cf, NULL);
- *cf = pcf;
- if (rv != NGX_CONF_OK) {
- return rv;
- }
- if (uscf->servers->nelts == 0) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "no servers are inside upstream");
- return NGX_CONF_ERROR;
- }
- return rv;
- }
- static char *
- ngx_stream_upstream_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
- {
- ngx_stream_upstream_srv_conf_t *uscf = conf;
- time_t fail_timeout;
- ngx_str_t *value, s;
- ngx_url_t u;
- ngx_int_t weight, max_conns, max_fails;
- ngx_uint_t i;
- #if (NGX_STREAM_UPSTREAM_ZONE)
- ngx_uint_t resolve;
- #endif
- ngx_stream_upstream_server_t *us;
- us = ngx_array_push(uscf->servers);
- if (us == NULL) {
- return NGX_CONF_ERROR;
- }
- ngx_memzero(us, sizeof(ngx_stream_upstream_server_t));
- value = cf->args->elts;
- weight = 1;
- max_conns = 0;
- max_fails = 1;
- fail_timeout = 10;
- #if (NGX_STREAM_UPSTREAM_ZONE)
- resolve = 0;
- #endif
- for (i = 2; i < cf->args->nelts; i++) {
- if (ngx_strncmp(value[i].data, "weight=", 7) == 0) {
- if (!(uscf->flags & NGX_STREAM_UPSTREAM_WEIGHT)) {
- goto not_supported;
- }
- weight = ngx_atoi(&value[i].data[7], value[i].len - 7);
- if (weight == NGX_ERROR || weight == 0) {
- goto invalid;
- }
- continue;
- }
- if (ngx_strncmp(value[i].data, "max_conns=", 10) == 0) {
- if (!(uscf->flags & NGX_STREAM_UPSTREAM_MAX_CONNS)) {
- goto not_supported;
- }
- max_conns = ngx_atoi(&value[i].data[10], value[i].len - 10);
- if (max_conns == NGX_ERROR) {
- goto invalid;
- }
- continue;
- }
- if (ngx_strncmp(value[i].data, "max_fails=", 10) == 0) {
- if (!(uscf->flags & NGX_STREAM_UPSTREAM_MAX_FAILS)) {
- goto not_supported;
- }
- max_fails = ngx_atoi(&value[i].data[10], value[i].len - 10);
- if (max_fails == NGX_ERROR) {
- goto invalid;
- }
- continue;
- }
- if (ngx_strncmp(value[i].data, "fail_timeout=", 13) == 0) {
- if (!(uscf->flags & NGX_STREAM_UPSTREAM_FAIL_TIMEOUT)) {
- goto not_supported;
- }
- s.len = value[i].len - 13;
- s.data = &value[i].data[13];
- fail_timeout = ngx_parse_time(&s, 1);
- if (fail_timeout == (time_t) NGX_ERROR) {
- goto invalid;
- }
- continue;
- }
- if (ngx_strcmp(value[i].data, "backup") == 0) {
- if (!(uscf->flags & NGX_STREAM_UPSTREAM_BACKUP)) {
- goto not_supported;
- }
- us->backup = 1;
- continue;
- }
- if (ngx_strcmp(value[i].data, "down") == 0) {
- if (!(uscf->flags & NGX_STREAM_UPSTREAM_DOWN)) {
- goto not_supported;
- }
- us->down = 1;
- continue;
- }
- #if (NGX_STREAM_UPSTREAM_ZONE)
- if (ngx_strcmp(value[i].data, "resolve") == 0) {
- resolve = 1;
- continue;
- }
- if (ngx_strncmp(value[i].data, "service=", 8) == 0) {
- us->service.len = value[i].len - 8;
- us->service.data = &value[i].data[8];
- if (us->service.len == 0) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "service is empty");
- return NGX_CONF_ERROR;
- }
- continue;
- }
- #endif
- goto invalid;
- }
- ngx_memzero(&u, sizeof(ngx_url_t));
- u.url = value[1];
- #if (NGX_STREAM_UPSTREAM_ZONE)
- if (resolve) {
-
- u.no_resolve = 1;
- }
- if (us->service.len && !resolve) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "service upstream \"%V\" requires "
- "\"resolve\" parameter",
- &u.url);
- return NGX_CONF_ERROR;
- }
- #endif
- if (ngx_parse_url(cf->pool, &u) != NGX_OK) {
- if (u.err) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "%s in upstream \"%V\"", u.err, &u.url);
- }
- return NGX_CONF_ERROR;
- }
- if (u.no_port
- #if (NGX_STREAM_UPSTREAM_ZONE)
- && us->service.len == 0
- #endif
- )
- {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "no port in upstream \"%V\"", &u.url);
- return NGX_CONF_ERROR;
- }
- us->name = u.url;
- #if (NGX_STREAM_UPSTREAM_ZONE)
- if (us->service.len && !u.no_port) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "service upstream \"%V\" may not have port",
- &us->name);
- return NGX_CONF_ERROR;
- }
- if (us->service.len && u.naddrs) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "service upstream \"%V\" requires domain name",
- &us->name);
- return NGX_CONF_ERROR;
- }
- if (resolve && u.naddrs == 0) {
- ngx_addr_t *addr;
-
- addr = ngx_pcalloc(cf->pool, sizeof(ngx_addr_t));
- if (addr == NULL) {
- return NGX_CONF_ERROR;
- }
- addr->sockaddr = ngx_palloc(cf->pool, u.socklen);
- if (addr->sockaddr == NULL) {
- return NGX_CONF_ERROR;
- }
- ngx_memcpy(addr->sockaddr, &u.sockaddr, u.socklen);
- addr->socklen = u.socklen;
- us->addrs = addr;
- us->naddrs = 1;
- us->host = u.host;
- } else {
- us->addrs = u.addrs;
- us->naddrs = u.naddrs;
- }
- #else
- us->addrs = u.addrs;
- us->naddrs = u.naddrs;
- #endif
- us->weight = weight;
- us->max_conns = max_conns;
- us->max_fails = max_fails;
- us->fail_timeout = fail_timeout;
- return NGX_CONF_OK;
- invalid:
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "invalid parameter \"%V\"", &value[i]);
- return NGX_CONF_ERROR;
- not_supported:
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "balancing method does not support parameter \"%V\"",
- &value[i]);
- return NGX_CONF_ERROR;
- }
- #if (NGX_STREAM_UPSTREAM_ZONE)
- static char *
- ngx_stream_upstream_resolver(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
- {
- ngx_stream_upstream_srv_conf_t *uscf = conf;
- ngx_str_t *value;
- if (uscf->resolver) {
- return "is duplicate";
- }
- value = cf->args->elts;
- uscf->resolver = ngx_resolver_create(cf, &value[1], cf->args->nelts - 1);
- if (uscf->resolver == NULL) {
- return NGX_CONF_ERROR;
- }
- return NGX_CONF_OK;
- }
- #endif
- ngx_stream_upstream_srv_conf_t *
- ngx_stream_upstream_add(ngx_conf_t *cf, ngx_url_t *u, ngx_uint_t flags)
- {
- ngx_uint_t i;
- ngx_stream_upstream_server_t *us;
- ngx_stream_upstream_srv_conf_t *uscf, **uscfp;
- ngx_stream_upstream_main_conf_t *umcf;
- if (!(flags & NGX_STREAM_UPSTREAM_CREATE)) {
- if (ngx_parse_url(cf->pool, u) != NGX_OK) {
- if (u->err) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "%s in upstream \"%V\"", u->err, &u->url);
- }
- return NULL;
- }
- }
- umcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_upstream_module);
- uscfp = umcf->upstreams.elts;
- for (i = 0; i < umcf->upstreams.nelts; i++) {
- if (uscfp[i]->host.len != u->host.len
- || ngx_strncasecmp(uscfp[i]->host.data, u->host.data, u->host.len)
- != 0)
- {
- continue;
- }
- if ((flags & NGX_STREAM_UPSTREAM_CREATE)
- && (uscfp[i]->flags & NGX_STREAM_UPSTREAM_CREATE))
- {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "duplicate upstream \"%V\"", &u->host);
- return NULL;
- }
- if ((uscfp[i]->flags & NGX_STREAM_UPSTREAM_CREATE) && !u->no_port) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "upstream \"%V\" may not have port %d",
- &u->host, u->port);
- return NULL;
- }
- if ((flags & NGX_STREAM_UPSTREAM_CREATE) && !uscfp[i]->no_port) {
- ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
- "upstream \"%V\" may not have port %d in %s:%ui",
- &u->host, uscfp[i]->port,
- uscfp[i]->file_name, uscfp[i]->line);
- return NULL;
- }
- if (uscfp[i]->port != u->port) {
- continue;
- }
- if (flags & NGX_STREAM_UPSTREAM_CREATE) {
- uscfp[i]->flags = flags;
- }
- return uscfp[i];
- }
- uscf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_srv_conf_t));
- if (uscf == NULL) {
- return NULL;
- }
- uscf->flags = flags;
- uscf->host = u->host;
- uscf->file_name = cf->conf_file->file.name.data;
- uscf->line = cf->conf_file->line;
- uscf->port = u->port;
- uscf->no_port = u->no_port;
- #if (NGX_STREAM_UPSTREAM_ZONE)
- uscf->resolver_timeout = NGX_CONF_UNSET_MSEC;
- #endif
- if (u->naddrs == 1 && (u->port || u->family == AF_UNIX)) {
- uscf->servers = ngx_array_create(cf->pool, 1,
- sizeof(ngx_stream_upstream_server_t));
- if (uscf->servers == NULL) {
- return NULL;
- }
- us = ngx_array_push(uscf->servers);
- if (us == NULL) {
- return NULL;
- }
- ngx_memzero(us, sizeof(ngx_stream_upstream_server_t));
- us->addrs = u->addrs;
- us->naddrs = 1;
- }
- uscfp = ngx_array_push(&umcf->upstreams);
- if (uscfp == NULL) {
- return NULL;
- }
- *uscfp = uscf;
- return uscf;
- }
- static void *
- ngx_stream_upstream_create_main_conf(ngx_conf_t *cf)
- {
- ngx_stream_upstream_main_conf_t *umcf;
- umcf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_main_conf_t));
- if (umcf == NULL) {
- return NULL;
- }
- if (ngx_array_init(&umcf->upstreams, cf->pool, 4,
- sizeof(ngx_stream_upstream_srv_conf_t *))
- != NGX_OK)
- {
- return NULL;
- }
- return umcf;
- }
- static char *
- ngx_stream_upstream_init_main_conf(ngx_conf_t *cf, void *conf)
- {
- ngx_stream_upstream_main_conf_t *umcf = conf;
- ngx_uint_t i;
- ngx_stream_upstream_init_pt init;
- ngx_stream_upstream_srv_conf_t **uscfp;
- uscfp = umcf->upstreams.elts;
- for (i = 0; i < umcf->upstreams.nelts; i++) {
- init = uscfp[i]->peer.init_upstream
- ? uscfp[i]->peer.init_upstream
- : ngx_stream_upstream_init_round_robin;
- if (init(cf, uscfp[i]) != NGX_OK) {
- return NGX_CONF_ERROR;
- }
- }
- return NGX_CONF_OK;
- }
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