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260
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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660
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4 * Copyright (C) Nginx, Inc.
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260
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_http.h>
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11
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12
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372
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13 static ngx_int_t ngx_http_upstream_cmp_servers(const void *one,
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14 const void *two);
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324
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15 static ngx_uint_t
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16 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peers_t *peers);
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17
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632
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18 #if (NGX_HTTP_SSL)
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19
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20 static ngx_int_t ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc,
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21 void *data);
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22 static void ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc,
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23 void *data);
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24
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25 #endif
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26
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324
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27
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260
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28 ngx_int_t
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29 ngx_http_upstream_init_round_robin(ngx_conf_t *cf,
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30 ngx_http_upstream_srv_conf_t *us)
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31 {
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32 ngx_url_t u;
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33 ngx_uint_t i, j, n;
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34 ngx_http_upstream_server_t *server;
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326
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35 ngx_http_upstream_rr_peers_t *peers, *backup;
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260
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36
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37 us->peer.init = ngx_http_upstream_init_round_robin_peer;
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38
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39 if (us->servers) {
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40 server = us->servers->elts;
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41
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326
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42 n = 0;
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43
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260
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44 for (i = 0; i < us->servers->nelts; i++) {
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326
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45 if (server[i].backup) {
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46 continue;
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47 }
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48
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260
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49 n += server[i].naddrs;
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50 }
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51
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52 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t)
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53 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1));
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54 if (peers == NULL) {
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55 return NGX_ERROR;
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56 }
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57
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326
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58 peers->single = (n == 1);
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260
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59 peers->number = n;
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60 peers->name = &us->host;
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61
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62 n = 0;
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63
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64 for (i = 0; i < us->servers->nelts; i++) {
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65 for (j = 0; j < server[i].naddrs; j++) {
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326
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66 if (server[i].backup) {
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67 continue;
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68 }
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69
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260
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70 peers->peer[n].sockaddr = server[i].addrs[j].sockaddr;
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71 peers->peer[n].socklen = server[i].addrs[j].socklen;
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72 peers->peer[n].name = server[i].addrs[j].name;
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73 peers->peer[n].max_fails = server[i].max_fails;
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74 peers->peer[n].fail_timeout = server[i].fail_timeout;
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75 peers->peer[n].down = server[i].down;
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326
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76 peers->peer[n].weight = server[i].down ? 0 : server[i].weight;
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77 peers->peer[n].current_weight = peers->peer[n].weight;
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260
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78 n++;
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79 }
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80 }
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81
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82 us->peer.data = peers;
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83
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326
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84 ngx_sort(&peers->peer[0], (size_t) n,
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85 sizeof(ngx_http_upstream_rr_peer_t),
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86 ngx_http_upstream_cmp_servers);
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87
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88 /* backup servers */
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89
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90 n = 0;
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91
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92 for (i = 0; i < us->servers->nelts; i++) {
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93 if (!server[i].backup) {
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94 continue;
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95 }
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96
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97 n += server[i].naddrs;
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98 }
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99
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100 if (n == 0) {
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101 return NGX_OK;
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102 }
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103
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104 backup = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t)
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105 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1));
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106 if (backup == NULL) {
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107 return NGX_ERROR;
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108 }
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109
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110 peers->single = 0;
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111 backup->single = 0;
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112 backup->number = n;
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113 backup->name = &us->host;
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114
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115 n = 0;
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116
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117 for (i = 0; i < us->servers->nelts; i++) {
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118 for (j = 0; j < server[i].naddrs; j++) {
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119 if (!server[i].backup) {
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120 continue;
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121 }
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122
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123 backup->peer[n].sockaddr = server[i].addrs[j].sockaddr;
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124 backup->peer[n].socklen = server[i].addrs[j].socklen;
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125 backup->peer[n].name = server[i].addrs[j].name;
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126 backup->peer[n].weight = server[i].weight;
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127 backup->peer[n].current_weight = server[i].weight;
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128 backup->peer[n].max_fails = server[i].max_fails;
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129 backup->peer[n].fail_timeout = server[i].fail_timeout;
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130 backup->peer[n].down = server[i].down;
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131 n++;
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132 }
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133 }
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134
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135 peers->next = backup;
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136
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137 ngx_sort(&backup->peer[0], (size_t) n,
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138 sizeof(ngx_http_upstream_rr_peer_t),
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139 ngx_http_upstream_cmp_servers);
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140
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260
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141 return NGX_OK;
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142 }
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143
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144
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145 /* an upstream implicitly defined by proxy_pass, etc. */
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146
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266
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147 if (us->port == 0 && us->default_port == 0) {
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148 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
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149 "no port in upstream \"%V\" in %s:%ui",
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336
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150 &us->host, us->file_name, us->line);
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266
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151 return NGX_ERROR;
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152 }
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153
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260
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154 ngx_memzero(&u, sizeof(ngx_url_t));
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155
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156 u.host = us->host;
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266
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157 u.port = (in_port_t) (us->port ? us->port : us->default_port);
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260
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158
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340
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159 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) {
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260
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160 if (u.err) {
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161 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
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262
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162 "%s in upstream \"%V\" in %s:%ui",
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336
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163 u.err, &us->host, us->file_name, us->line);
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260
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164 }
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165
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166 return NGX_ERROR;
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167 }
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168
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169 n = u.naddrs;
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170
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171 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t)
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172 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1));
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173 if (peers == NULL) {
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174 return NGX_ERROR;
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175 }
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176
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326
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177 peers->single = (n == 1);
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260
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178 peers->number = n;
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179 peers->name = &us->host;
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180
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181 for (i = 0; i < u.naddrs; i++) {
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340
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182 peers->peer[i].sockaddr = u.addrs[i].sockaddr;
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183 peers->peer[i].socklen = u.addrs[i].socklen;
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184 peers->peer[i].name = u.addrs[i].name;
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185 peers->peer[i].weight = 1;
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186 peers->peer[i].current_weight = 1;
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187 peers->peer[i].max_fails = 1;
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188 peers->peer[i].fail_timeout = 10;
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260
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189 }
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190
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191 us->peer.data = peers;
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192
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326
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193 /* implicitly defined upstream has no backup servers */
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194
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260
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195 return NGX_OK;
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196 }
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197
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198
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372
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199 static ngx_int_t
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326
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200 ngx_http_upstream_cmp_servers(const void *one, const void *two)
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201 {
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202 ngx_http_upstream_rr_peer_t *first, *second;
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203
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204 first = (ngx_http_upstream_rr_peer_t *) one;
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205 second = (ngx_http_upstream_rr_peer_t *) two;
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206
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207 return (first->weight < second->weight);
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208 }
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209
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210
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260
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211 ngx_int_t
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212 ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r,
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213 ngx_http_upstream_srv_conf_t *us)
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214 {
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215 ngx_uint_t n;
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216 ngx_http_upstream_rr_peer_data_t *rrp;
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217
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218 rrp = r->upstream->peer.data;
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219
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220 if (rrp == NULL) {
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221 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t));
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222 if (rrp == NULL) {
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223 return NGX_ERROR;
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224 }
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225
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226 r->upstream->peer.data = rrp;
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227 }
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228
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229 rrp->peers = us->peer.data;
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230 rrp->current = 0;
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231
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634
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232 n = rrp->peers->number;
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233
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234 if (rrp->peers->next && rrp->peers->next->number > n) {
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235 n = rrp->peers->next->number;
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236 }
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237
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238 if (n <= 8 * sizeof(uintptr_t)) {
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260
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239 rrp->tried = &rrp->data;
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240 rrp->data = 0;
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241
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242 } else {
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634
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243 n = (n + (8 * sizeof(uintptr_t) - 1)) / (8 * sizeof(uintptr_t));
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260
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244
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245 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t));
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246 if (rrp->tried == NULL) {
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247 return NGX_ERROR;
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248 }
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249 }
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250
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251 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer;
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252 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer;
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253 r->upstream->peer.tries = rrp->peers->number;
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254 #if (NGX_HTTP_SSL)
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318
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255 r->upstream->peer.set_session =
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256 ngx_http_upstream_set_round_robin_peer_session;
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257 r->upstream->peer.save_session =
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258 ngx_http_upstream_save_round_robin_peer_session;
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260
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259 #endif
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260
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261 return NGX_OK;
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262 }
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263
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264
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265 ngx_int_t
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348
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266 ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r,
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267 ngx_http_upstream_resolved_t *ur)
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268 {
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269 u_char *p;
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270 size_t len;
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271 ngx_uint_t i, n;
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272 struct sockaddr_in *sin;
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273 ngx_http_upstream_rr_peers_t *peers;
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274 ngx_http_upstream_rr_peer_data_t *rrp;
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275
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276 rrp = r->upstream->peer.data;
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277
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278 if (rrp == NULL) {
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279 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t));
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280 if (rrp == NULL) {
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281 return NGX_ERROR;
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282 }
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283
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284 r->upstream->peer.data = rrp;
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285 }
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286
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287 peers = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_rr_peers_t)
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288 + sizeof(ngx_http_upstream_rr_peer_t) * (ur->naddrs - 1));
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289 if (peers == NULL) {
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290 return NGX_ERROR;
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291 }
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292
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293 peers->single = (ur->naddrs == 1);
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294 peers->number = ur->naddrs;
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295 peers->name = &ur->host;
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296
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434
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297 if (ur->sockaddr) {
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298 peers->peer[0].sockaddr = ur->sockaddr;
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299 peers->peer[0].socklen = ur->socklen;
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300 peers->peer[0].name = ur->host;
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301 peers->peer[0].weight = 1;
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302 peers->peer[0].current_weight = 1;
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303 peers->peer[0].max_fails = 1;
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304 peers->peer[0].fail_timeout = 10;
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348
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305
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434
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306 } else {
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307
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308 for (i = 0; i < ur->naddrs; i++) {
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348
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309
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434
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310 len = NGX_INET_ADDRSTRLEN + sizeof(":65536") - 1;
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311
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312 p = ngx_pnalloc(r->pool, len);
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313 if (p == NULL) {
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314 return NGX_ERROR;
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315 }
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348
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316
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434
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317 len = ngx_inet_ntop(AF_INET, &ur->addrs[i], p, NGX_INET_ADDRSTRLEN);
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318 len = ngx_sprintf(&p[len], ":%d", ur->port) - p;
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348
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319
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434
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320 sin = ngx_pcalloc(r->pool, sizeof(struct sockaddr_in));
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321 if (sin == NULL) {
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322 return NGX_ERROR;
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323 }
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348
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324
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434
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325 sin->sin_family = AF_INET;
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326 sin->sin_port = htons(ur->port);
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327 sin->sin_addr.s_addr = ur->addrs[i];
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328
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329 peers->peer[i].sockaddr = (struct sockaddr *) sin;
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330 peers->peer[i].socklen = sizeof(struct sockaddr_in);
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331 peers->peer[i].name.len = len;
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332 peers->peer[i].name.data = p;
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333 peers->peer[i].weight = 1;
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334 peers->peer[i].current_weight = 1;
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335 peers->peer[i].max_fails = 1;
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336 peers->peer[i].fail_timeout = 10;
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337 }
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348
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338 }
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339
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340 rrp->peers = peers;
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341 rrp->current = 0;
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342
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343 if (rrp->peers->number <= 8 * sizeof(uintptr_t)) {
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344 rrp->tried = &rrp->data;
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345 rrp->data = 0;
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346
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347 } else {
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348 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1))
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349 / (8 * sizeof(uintptr_t));
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350
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351 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t));
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352 if (rrp->tried == NULL) {
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353 return NGX_ERROR;
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354 }
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355 }
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356
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357 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer;
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358 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer;
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359 r->upstream->peer.tries = rrp->peers->number;
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360 #if (NGX_HTTP_SSL)
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632
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361 r->upstream->peer.set_session = ngx_http_upstream_empty_set_session;
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362 r->upstream->peer.save_session = ngx_http_upstream_empty_save_session;
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348
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363 #endif
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364
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365 return NGX_OK;
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366 }
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367
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368
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369 ngx_int_t
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260
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370 ngx_http_upstream_get_round_robin_peer(ngx_peer_connection_t *pc, void *data)
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371 {
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372 ngx_http_upstream_rr_peer_data_t *rrp = data;
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373
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326
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374 time_t now;
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375 uintptr_t m;
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376 ngx_int_t rc;
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377 ngx_uint_t i, n;
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378 ngx_connection_t *c;
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379 ngx_http_upstream_rr_peer_t *peer;
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380 ngx_http_upstream_rr_peers_t *peers;
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260
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381
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382 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0,
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383 "get rr peer, try: %ui", pc->tries);
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384
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|
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385 now = ngx_time();
|
|
|
386
|
|
|
387 /* ngx_lock_mutex(rrp->peers->mutex); */
|
|
|
388
|
|
|
389 if (rrp->peers->last_cached) {
|
|
|
390
|
|
|
391 /* cached connection */
|
|
|
392
|
|
|
393 c = rrp->peers->cached[rrp->peers->last_cached];
|
|
|
394 rrp->peers->last_cached--;
|
|
|
395
|
|
|
396 /* ngx_unlock_mutex(ppr->peers->mutex); */
|
|
|
397
|
|
|
398 #if (NGX_THREADS)
|
|
|
399 c->read->lock = c->read->own_lock;
|
|
|
400 c->write->lock = c->write->own_lock;
|
|
|
401 #endif
|
|
|
402
|
|
|
403 pc->connection = c;
|
|
|
404 pc->cached = 1;
|
|
|
405
|
|
|
406 return NGX_OK;
|
|
|
407 }
|
|
|
408
|
|
|
409 pc->cached = 0;
|
|
|
410 pc->connection = NULL;
|
|
|
411
|
|
326
|
412 if (rrp->peers->single) {
|
|
260
|
413 peer = &rrp->peers->peer[0];
|
|
|
414
|
|
|
415 } else {
|
|
|
416
|
|
|
417 /* there are several peers */
|
|
|
418
|
|
|
419 if (pc->tries == rrp->peers->number) {
|
|
|
420
|
|
|
421 /* it's a first try - get a current peer */
|
|
|
422
|
|
330
|
423 i = pc->tries;
|
|
|
424
|
|
260
|
425 for ( ;; ) {
|
|
324
|
426 rrp->current = ngx_http_upstream_get_peer(rrp->peers);
|
|
|
427
|
|
|
428 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
|
429 "get rr peer, current: %ui %i",
|
|
|
430 rrp->current,
|
|
|
431 rrp->peers->peer[rrp->current].current_weight);
|
|
260
|
432
|
|
|
433 n = rrp->current / (8 * sizeof(uintptr_t));
|
|
302
|
434 m = (uintptr_t) 1 << rrp->current % (8 * sizeof(uintptr_t));
|
|
260
|
435
|
|
|
436 if (!(rrp->tried[n] & m)) {
|
|
|
437 peer = &rrp->peers->peer[rrp->current];
|
|
|
438
|
|
|
439 if (!peer->down) {
|
|
|
440
|
|
|
441 if (peer->max_fails == 0
|
|
|
442 || peer->fails < peer->max_fails)
|
|
|
443 {
|
|
|
444 break;
|
|
|
445 }
|
|
|
446
|
|
644
|
447 if (now - peer->checked > peer->fail_timeout) {
|
|
|
448 peer->checked = now;
|
|
260
|
449 break;
|
|
|
450 }
|
|
|
451
|
|
324
|
452 peer->current_weight = 0;
|
|
|
453
|
|
260
|
454 } else {
|
|
|
455 rrp->tried[n] |= m;
|
|
|
456 }
|
|
|
457
|
|
|
458 pc->tries--;
|
|
|
459 }
|
|
|
460
|
|
330
|
461 if (pc->tries == 0) {
|
|
|
462 goto failed;
|
|
260
|
463 }
|
|
|
464
|
|
330
|
465 if (--i == 0) {
|
|
|
466 ngx_log_error(NGX_LOG_ALERT, pc->log, 0,
|
|
|
467 "round robin upstream stuck on %ui tries",
|
|
|
468 pc->tries);
|
|
|
469 goto failed;
|
|
|
470 }
|
|
260
|
471 }
|
|
|
472
|
|
|
473 peer->current_weight--;
|
|
|
474
|
|
|
475 } else {
|
|
330
|
476
|
|
|
477 i = pc->tries;
|
|
|
478
|
|
260
|
479 for ( ;; ) {
|
|
|
480 n = rrp->current / (8 * sizeof(uintptr_t));
|
|
302
|
481 m = (uintptr_t) 1 << rrp->current % (8 * sizeof(uintptr_t));
|
|
260
|
482
|
|
|
483 if (!(rrp->tried[n] & m)) {
|
|
|
484
|
|
|
485 peer = &rrp->peers->peer[rrp->current];
|
|
|
486
|
|
|
487 if (!peer->down) {
|
|
|
488
|
|
|
489 if (peer->max_fails == 0
|
|
|
490 || peer->fails < peer->max_fails)
|
|
|
491 {
|
|
|
492 break;
|
|
|
493 }
|
|
|
494
|
|
644
|
495 if (now - peer->checked > peer->fail_timeout) {
|
|
|
496 peer->checked = now;
|
|
260
|
497 break;
|
|
|
498 }
|
|
|
499
|
|
324
|
500 peer->current_weight = 0;
|
|
|
501
|
|
260
|
502 } else {
|
|
|
503 rrp->tried[n] |= m;
|
|
|
504 }
|
|
|
505
|
|
|
506 pc->tries--;
|
|
|
507 }
|
|
|
508
|
|
|
509 rrp->current++;
|
|
|
510
|
|
|
511 if (rrp->current >= rrp->peers->number) {
|
|
|
512 rrp->current = 0;
|
|
|
513 }
|
|
|
514
|
|
330
|
515 if (pc->tries == 0) {
|
|
|
516 goto failed;
|
|
260
|
517 }
|
|
|
518
|
|
330
|
519 if (--i == 0) {
|
|
|
520 ngx_log_error(NGX_LOG_ALERT, pc->log, 0,
|
|
|
521 "round robin upstream stuck on %ui tries",
|
|
|
522 pc->tries);
|
|
|
523 goto failed;
|
|
|
524 }
|
|
260
|
525 }
|
|
|
526
|
|
|
527 peer->current_weight--;
|
|
|
528 }
|
|
|
529
|
|
|
530 rrp->tried[n] |= m;
|
|
|
531 }
|
|
|
532
|
|
|
533 pc->sockaddr = peer->sockaddr;
|
|
|
534 pc->socklen = peer->socklen;
|
|
|
535 pc->name = &peer->name;
|
|
|
536
|
|
|
537 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
|
538
|
|
326
|
539 if (pc->tries == 1 && rrp->peers->next) {
|
|
|
540 pc->tries += rrp->peers->next->number;
|
|
|
541
|
|
|
542 n = rrp->peers->next->number / (8 * sizeof(uintptr_t)) + 1;
|
|
|
543 for (i = 0; i < n; i++) {
|
|
|
544 rrp->tried[i] = 0;
|
|
|
545 }
|
|
|
546 }
|
|
|
547
|
|
260
|
548 return NGX_OK;
|
|
|
549
|
|
|
550 failed:
|
|
|
551
|
|
326
|
552 peers = rrp->peers;
|
|
|
553
|
|
|
554 if (peers->next) {
|
|
|
555
|
|
|
556 /* ngx_unlock_mutex(peers->mutex); */
|
|
|
557
|
|
|
558 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, "backup servers");
|
|
|
559
|
|
|
560 rrp->peers = peers->next;
|
|
|
561 pc->tries = rrp->peers->number;
|
|
|
562
|
|
|
563 n = rrp->peers->number / (8 * sizeof(uintptr_t)) + 1;
|
|
|
564 for (i = 0; i < n; i++) {
|
|
|
565 rrp->tried[i] = 0;
|
|
|
566 }
|
|
|
567
|
|
|
568 rc = ngx_http_upstream_get_round_robin_peer(pc, rrp);
|
|
|
569
|
|
|
570 if (rc != NGX_BUSY) {
|
|
|
571 return rc;
|
|
|
572 }
|
|
|
573
|
|
|
574 /* ngx_lock_mutex(peers->mutex); */
|
|
|
575 }
|
|
|
576
|
|
260
|
577 /* all peers failed, mark them as live for quick recovery */
|
|
|
578
|
|
326
|
579 for (i = 0; i < peers->number; i++) {
|
|
|
580 peers->peer[i].fails = 0;
|
|
260
|
581 }
|
|
|
582
|
|
326
|
583 /* ngx_unlock_mutex(peers->mutex); */
|
|
260
|
584
|
|
326
|
585 pc->name = peers->name;
|
|
260
|
586
|
|
|
587 return NGX_BUSY;
|
|
|
588 }
|
|
|
589
|
|
|
590
|
|
324
|
591 static ngx_uint_t
|
|
|
592 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peers_t *peers)
|
|
|
593 {
|
|
634
|
594 ngx_uint_t i, n, reset = 0;
|
|
324
|
595 ngx_http_upstream_rr_peer_t *peer;
|
|
|
596
|
|
|
597 peer = &peers->peer[0];
|
|
|
598
|
|
|
599 for ( ;; ) {
|
|
|
600
|
|
|
601 for (i = 0; i < peers->number; i++) {
|
|
|
602
|
|
|
603 if (peer[i].current_weight <= 0) {
|
|
|
604 continue;
|
|
|
605 }
|
|
|
606
|
|
|
607 n = i;
|
|
|
608
|
|
|
609 while (i < peers->number - 1) {
|
|
|
610
|
|
|
611 i++;
|
|
|
612
|
|
|
613 if (peer[i].current_weight <= 0) {
|
|
|
614 continue;
|
|
|
615 }
|
|
|
616
|
|
|
617 if (peer[n].current_weight * 1000 / peer[i].current_weight
|
|
336
|
618 > peer[n].weight * 1000 / peer[i].weight)
|
|
324
|
619 {
|
|
|
620 return n;
|
|
|
621 }
|
|
|
622
|
|
|
623 n = i;
|
|
|
624 }
|
|
|
625
|
|
|
626 if (peer[i].current_weight > 0) {
|
|
|
627 n = i;
|
|
|
628 }
|
|
|
629
|
|
|
630 return n;
|
|
|
631 }
|
|
|
632
|
|
634
|
633 if (reset++) {
|
|
|
634 return 0;
|
|
|
635 }
|
|
|
636
|
|
324
|
637 for (i = 0; i < peers->number; i++) {
|
|
364
|
638 peer[i].current_weight = peer[i].weight;
|
|
324
|
639 }
|
|
|
640 }
|
|
|
641 }
|
|
|
642
|
|
|
643
|
|
260
|
644 void
|
|
|
645 ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, void *data,
|
|
|
646 ngx_uint_t state)
|
|
|
647 {
|
|
|
648 ngx_http_upstream_rr_peer_data_t *rrp = data;
|
|
|
649
|
|
|
650 time_t now;
|
|
|
651 ngx_http_upstream_rr_peer_t *peer;
|
|
|
652
|
|
|
653 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
|
654 "free rr peer %ui %ui", pc->tries, state);
|
|
|
655
|
|
|
656 if (state == 0 && pc->tries == 0) {
|
|
|
657 return;
|
|
|
658 }
|
|
|
659
|
|
|
660 /* TODO: NGX_PEER_KEEPALIVE */
|
|
|
661
|
|
326
|
662 if (rrp->peers->single) {
|
|
260
|
663 pc->tries = 0;
|
|
|
664 return;
|
|
|
665 }
|
|
|
666
|
|
644
|
667 peer = &rrp->peers->peer[rrp->current];
|
|
|
668
|
|
260
|
669 if (state & NGX_PEER_FAILED) {
|
|
|
670 now = ngx_time();
|
|
|
671
|
|
|
672 /* ngx_lock_mutex(rrp->peers->mutex); */
|
|
|
673
|
|
|
674 peer->fails++;
|
|
|
675 peer->accessed = now;
|
|
644
|
676 peer->checked = now;
|
|
260
|
677
|
|
400
|
678 if (peer->max_fails) {
|
|
|
679 peer->current_weight -= peer->weight / peer->max_fails;
|
|
|
680 }
|
|
324
|
681
|
|
|
682 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
|
683 "free rr peer failed: %ui %i",
|
|
|
684 rrp->current, peer->current_weight);
|
|
|
685
|
|
|
686 if (peer->current_weight < 0) {
|
|
|
687 peer->current_weight = 0;
|
|
260
|
688 }
|
|
|
689
|
|
|
690 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
644
|
691
|
|
|
692 } else {
|
|
|
693
|
|
|
694 /* mark peer live if check passed */
|
|
|
695
|
|
|
696 if (peer->accessed < peer->checked) {
|
|
|
697 peer->fails = 0;
|
|
|
698 }
|
|
260
|
699 }
|
|
|
700
|
|
|
701 rrp->current++;
|
|
|
702
|
|
|
703 if (rrp->current >= rrp->peers->number) {
|
|
|
704 rrp->current = 0;
|
|
|
705 }
|
|
|
706
|
|
|
707 if (pc->tries) {
|
|
|
708 pc->tries--;
|
|
|
709 }
|
|
|
710
|
|
|
711 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
|
712 }
|
|
|
713
|
|
|
714
|
|
|
715 #if (NGX_HTTP_SSL)
|
|
|
716
|
|
318
|
717 ngx_int_t
|
|
|
718 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc,
|
|
|
719 void *data)
|
|
260
|
720 {
|
|
|
721 ngx_http_upstream_rr_peer_data_t *rrp = data;
|
|
|
722
|
|
318
|
723 ngx_int_t rc;
|
|
260
|
724 ngx_ssl_session_t *ssl_session;
|
|
|
725 ngx_http_upstream_rr_peer_t *peer;
|
|
|
726
|
|
318
|
727 peer = &rrp->peers->peer[rrp->current];
|
|
|
728
|
|
|
729 /* TODO: threads only mutex */
|
|
|
730 /* ngx_lock_mutex(rrp->peers->mutex); */
|
|
|
731
|
|
|
732 ssl_session = peer->ssl_session;
|
|
|
733
|
|
|
734 rc = ngx_ssl_set_session(pc->connection, ssl_session);
|
|
|
735
|
|
|
736 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
332
|
737 "set session: %p:%d",
|
|
|
738 ssl_session, ssl_session ? ssl_session->references : 0);
|
|
318
|
739
|
|
|
740 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
|
741
|
|
|
742 return rc;
|
|
|
743 }
|
|
|
744
|
|
|
745
|
|
|
746 void
|
|
|
747 ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc,
|
|
|
748 void *data)
|
|
|
749 {
|
|
|
750 ngx_http_upstream_rr_peer_data_t *rrp = data;
|
|
|
751
|
|
|
752 ngx_ssl_session_t *old_ssl_session, *ssl_session;
|
|
|
753 ngx_http_upstream_rr_peer_t *peer;
|
|
|
754
|
|
260
|
755 ssl_session = ngx_ssl_get_session(pc->connection);
|
|
|
756
|
|
|
757 if (ssl_session == NULL) {
|
|
|
758 return;
|
|
|
759 }
|
|
|
760
|
|
318
|
761 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
332
|
762 "save session: %p:%d", ssl_session, ssl_session->references);
|
|
318
|
763
|
|
260
|
764 peer = &rrp->peers->peer[rrp->current];
|
|
|
765
|
|
318
|
766 /* TODO: threads only mutex */
|
|
260
|
767 /* ngx_lock_mutex(rrp->peers->mutex); */
|
|
318
|
768
|
|
|
769 old_ssl_session = peer->ssl_session;
|
|
260
|
770 peer->ssl_session = ssl_session;
|
|
318
|
771
|
|
260
|
772 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
|
773
|
|
318
|
774 if (old_ssl_session) {
|
|
|
775
|
|
|
776 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
332
|
777 "old session: %p:%d",
|
|
318
|
778 old_ssl_session, old_ssl_session->references);
|
|
|
779
|
|
260
|
780 /* TODO: may block */
|
|
318
|
781
|
|
|
782 ngx_ssl_free_session(old_ssl_session);
|
|
260
|
783 }
|
|
|
784 }
|
|
|
785
|
|
632
|
786
|
|
|
787 static ngx_int_t
|
|
|
788 ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc, void *data)
|
|
|
789 {
|
|
|
790 return NGX_OK;
|
|
|
791 }
|
|
|
792
|
|
|
793
|
|
|
794 static void
|
|
|
795 ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc, void *data)
|
|
|
796 {
|
|
|
797 return;
|
|
|
798 }
|
|
|
799
|
|
260
|
800 #endif
|
