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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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670
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52 if (n == 0) {
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53 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
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54 "no servers in upstream \"%V\" in %s:%ui",
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55 &us->host, us->file_name, us->line);
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56 return NGX_ERROR;
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57 }
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58
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260
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59 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t)
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60 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1));
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61 if (peers == NULL) {
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62 return NGX_ERROR;
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63 }
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64
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326
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65 peers->single = (n == 1);
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260
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66 peers->number = n;
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67 peers->name = &us->host;
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68
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69 n = 0;
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70
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71 for (i = 0; i < us->servers->nelts; i++) {
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72 for (j = 0; j < server[i].naddrs; j++) {
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326
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73 if (server[i].backup) {
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74 continue;
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75 }
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76
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260
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77 peers->peer[n].sockaddr = server[i].addrs[j].sockaddr;
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78 peers->peer[n].socklen = server[i].addrs[j].socklen;
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79 peers->peer[n].name = server[i].addrs[j].name;
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80 peers->peer[n].max_fails = server[i].max_fails;
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81 peers->peer[n].fail_timeout = server[i].fail_timeout;
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82 peers->peer[n].down = server[i].down;
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326
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83 peers->peer[n].weight = server[i].down ? 0 : server[i].weight;
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84 peers->peer[n].current_weight = peers->peer[n].weight;
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260
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85 n++;
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86 }
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87 }
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88
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89 us->peer.data = peers;
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90
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326
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91 ngx_sort(&peers->peer[0], (size_t) n,
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92 sizeof(ngx_http_upstream_rr_peer_t),
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93 ngx_http_upstream_cmp_servers);
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94
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95 /* backup servers */
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96
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97 n = 0;
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98
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99 for (i = 0; i < us->servers->nelts; i++) {
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100 if (!server[i].backup) {
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101 continue;
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102 }
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103
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104 n += server[i].naddrs;
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105 }
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106
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107 if (n == 0) {
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108 return NGX_OK;
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109 }
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110
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111 backup = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t)
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112 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1));
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113 if (backup == NULL) {
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114 return NGX_ERROR;
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115 }
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116
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117 peers->single = 0;
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118 backup->single = 0;
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119 backup->number = n;
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120 backup->name = &us->host;
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121
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122 n = 0;
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123
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124 for (i = 0; i < us->servers->nelts; i++) {
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125 for (j = 0; j < server[i].naddrs; j++) {
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126 if (!server[i].backup) {
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127 continue;
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128 }
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129
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130 backup->peer[n].sockaddr = server[i].addrs[j].sockaddr;
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131 backup->peer[n].socklen = server[i].addrs[j].socklen;
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132 backup->peer[n].name = server[i].addrs[j].name;
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133 backup->peer[n].weight = server[i].weight;
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134 backup->peer[n].current_weight = server[i].weight;
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135 backup->peer[n].max_fails = server[i].max_fails;
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136 backup->peer[n].fail_timeout = server[i].fail_timeout;
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137 backup->peer[n].down = server[i].down;
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138 n++;
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139 }
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140 }
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141
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142 peers->next = backup;
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143
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144 ngx_sort(&backup->peer[0], (size_t) n,
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145 sizeof(ngx_http_upstream_rr_peer_t),
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146 ngx_http_upstream_cmp_servers);
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147
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260
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148 return NGX_OK;
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149 }
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150
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151
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152 /* an upstream implicitly defined by proxy_pass, etc. */
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153
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266
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154 if (us->port == 0 && us->default_port == 0) {
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155 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
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156 "no port in upstream \"%V\" in %s:%ui",
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336
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157 &us->host, us->file_name, us->line);
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266
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158 return NGX_ERROR;
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159 }
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160
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260
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161 ngx_memzero(&u, sizeof(ngx_url_t));
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162
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163 u.host = us->host;
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266
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164 u.port = (in_port_t) (us->port ? us->port : us->default_port);
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260
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165
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340
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166 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) {
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260
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167 if (u.err) {
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168 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
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262
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169 "%s in upstream \"%V\" in %s:%ui",
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336
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170 u.err, &us->host, us->file_name, us->line);
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260
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171 }
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172
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173 return NGX_ERROR;
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174 }
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175
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176 n = u.naddrs;
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177
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178 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t)
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179 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1));
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180 if (peers == NULL) {
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181 return NGX_ERROR;
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182 }
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183
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326
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184 peers->single = (n == 1);
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260
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185 peers->number = n;
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186 peers->name = &us->host;
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187
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188 for (i = 0; i < u.naddrs; i++) {
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340
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189 peers->peer[i].sockaddr = u.addrs[i].sockaddr;
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190 peers->peer[i].socklen = u.addrs[i].socklen;
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191 peers->peer[i].name = u.addrs[i].name;
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192 peers->peer[i].weight = 1;
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193 peers->peer[i].current_weight = 1;
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194 peers->peer[i].max_fails = 1;
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195 peers->peer[i].fail_timeout = 10;
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260
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196 }
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197
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198 us->peer.data = peers;
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199
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326
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200 /* implicitly defined upstream has no backup servers */
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201
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260
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202 return NGX_OK;
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203 }
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204
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205
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372
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206 static ngx_int_t
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326
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207 ngx_http_upstream_cmp_servers(const void *one, const void *two)
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208 {
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209 ngx_http_upstream_rr_peer_t *first, *second;
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210
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211 first = (ngx_http_upstream_rr_peer_t *) one;
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212 second = (ngx_http_upstream_rr_peer_t *) two;
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213
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214 return (first->weight < second->weight);
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215 }
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216
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217
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260
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218 ngx_int_t
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219 ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r,
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220 ngx_http_upstream_srv_conf_t *us)
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221 {
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222 ngx_uint_t n;
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223 ngx_http_upstream_rr_peer_data_t *rrp;
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224
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225 rrp = r->upstream->peer.data;
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226
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227 if (rrp == NULL) {
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228 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t));
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229 if (rrp == NULL) {
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230 return NGX_ERROR;
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231 }
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232
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233 r->upstream->peer.data = rrp;
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234 }
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235
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236 rrp->peers = us->peer.data;
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237 rrp->current = 0;
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238
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634
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239 n = rrp->peers->number;
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240
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241 if (rrp->peers->next && rrp->peers->next->number > n) {
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242 n = rrp->peers->next->number;
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243 }
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244
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245 if (n <= 8 * sizeof(uintptr_t)) {
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260
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246 rrp->tried = &rrp->data;
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247 rrp->data = 0;
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248
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249 } else {
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634
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250 n = (n + (8 * sizeof(uintptr_t) - 1)) / (8 * sizeof(uintptr_t));
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260
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251
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252 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t));
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253 if (rrp->tried == NULL) {
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254 return NGX_ERROR;
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255 }
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256 }
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257
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258 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer;
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259 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer;
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260 r->upstream->peer.tries = rrp->peers->number;
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261 #if (NGX_HTTP_SSL)
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318
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262 r->upstream->peer.set_session =
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263 ngx_http_upstream_set_round_robin_peer_session;
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264 r->upstream->peer.save_session =
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265 ngx_http_upstream_save_round_robin_peer_session;
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260
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266 #endif
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267
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268 return NGX_OK;
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269 }
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270
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271
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272 ngx_int_t
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348
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273 ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r,
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274 ngx_http_upstream_resolved_t *ur)
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275 {
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276 u_char *p;
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277 size_t len;
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278 ngx_uint_t i, n;
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279 struct sockaddr_in *sin;
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280 ngx_http_upstream_rr_peers_t *peers;
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281 ngx_http_upstream_rr_peer_data_t *rrp;
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282
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283 rrp = r->upstream->peer.data;
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284
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285 if (rrp == NULL) {
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286 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t));
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287 if (rrp == NULL) {
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288 return NGX_ERROR;
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289 }
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290
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291 r->upstream->peer.data = rrp;
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292 }
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293
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294 peers = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_rr_peers_t)
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295 + sizeof(ngx_http_upstream_rr_peer_t) * (ur->naddrs - 1));
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296 if (peers == NULL) {
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297 return NGX_ERROR;
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298 }
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299
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300 peers->single = (ur->naddrs == 1);
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301 peers->number = ur->naddrs;
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302 peers->name = &ur->host;
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303
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434
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304 if (ur->sockaddr) {
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305 peers->peer[0].sockaddr = ur->sockaddr;
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306 peers->peer[0].socklen = ur->socklen;
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307 peers->peer[0].name = ur->host;
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308 peers->peer[0].weight = 1;
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309 peers->peer[0].current_weight = 1;
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310 peers->peer[0].max_fails = 1;
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311 peers->peer[0].fail_timeout = 10;
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348
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312
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434
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313 } else {
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314
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315 for (i = 0; i < ur->naddrs; i++) {
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348
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316
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434
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317 len = NGX_INET_ADDRSTRLEN + sizeof(":65536") - 1;
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318
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319 p = ngx_pnalloc(r->pool, len);
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320 if (p == NULL) {
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321 return NGX_ERROR;
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322 }
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348
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323
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434
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324 len = ngx_inet_ntop(AF_INET, &ur->addrs[i], p, NGX_INET_ADDRSTRLEN);
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325 len = ngx_sprintf(&p[len], ":%d", ur->port) - p;
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348
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326
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434
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327 sin = ngx_pcalloc(r->pool, sizeof(struct sockaddr_in));
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328 if (sin == NULL) {
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329 return NGX_ERROR;
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330 }
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348
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331
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434
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332 sin->sin_family = AF_INET;
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333 sin->sin_port = htons(ur->port);
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334 sin->sin_addr.s_addr = ur->addrs[i];
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335
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336 peers->peer[i].sockaddr = (struct sockaddr *) sin;
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337 peers->peer[i].socklen = sizeof(struct sockaddr_in);
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338 peers->peer[i].name.len = len;
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339 peers->peer[i].name.data = p;
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340 peers->peer[i].weight = 1;
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341 peers->peer[i].current_weight = 1;
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342 peers->peer[i].max_fails = 1;
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343 peers->peer[i].fail_timeout = 10;
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344 }
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348
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345 }
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346
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347 rrp->peers = peers;
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348 rrp->current = 0;
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349
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350 if (rrp->peers->number <= 8 * sizeof(uintptr_t)) {
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351 rrp->tried = &rrp->data;
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352 rrp->data = 0;
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353
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354 } else {
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355 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1))
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356 / (8 * sizeof(uintptr_t));
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357
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358 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t));
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359 if (rrp->tried == NULL) {
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360 return NGX_ERROR;
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361 }
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362 }
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363
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364 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer;
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365 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer;
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366 r->upstream->peer.tries = rrp->peers->number;
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367 #if (NGX_HTTP_SSL)
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632
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368 r->upstream->peer.set_session = ngx_http_upstream_empty_set_session;
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369 r->upstream->peer.save_session = ngx_http_upstream_empty_save_session;
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348
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370 #endif
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371
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372 return NGX_OK;
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373 }
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374
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375
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376 ngx_int_t
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260
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377 ngx_http_upstream_get_round_robin_peer(ngx_peer_connection_t *pc, void *data)
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378 {
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379 ngx_http_upstream_rr_peer_data_t *rrp = data;
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380
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326
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381 time_t now;
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382 uintptr_t m;
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383 ngx_int_t rc;
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384 ngx_uint_t i, n;
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385 ngx_connection_t *c;
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|
|
386 ngx_http_upstream_rr_peer_t *peer;
|
|
|
387 ngx_http_upstream_rr_peers_t *peers;
|
|
260
|
388
|
|
|
389 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
|
390 "get rr peer, try: %ui", pc->tries);
|
|
|
391
|
|
|
392 now = ngx_time();
|
|
|
393
|
|
|
394 /* ngx_lock_mutex(rrp->peers->mutex); */
|
|
|
395
|
|
|
396 if (rrp->peers->last_cached) {
|
|
|
397
|
|
|
398 /* cached connection */
|
|
|
399
|
|
|
400 c = rrp->peers->cached[rrp->peers->last_cached];
|
|
|
401 rrp->peers->last_cached--;
|
|
|
402
|
|
|
403 /* ngx_unlock_mutex(ppr->peers->mutex); */
|
|
|
404
|
|
|
405 #if (NGX_THREADS)
|
|
|
406 c->read->lock = c->read->own_lock;
|
|
|
407 c->write->lock = c->write->own_lock;
|
|
|
408 #endif
|
|
|
409
|
|
|
410 pc->connection = c;
|
|
|
411 pc->cached = 1;
|
|
|
412
|
|
|
413 return NGX_OK;
|
|
|
414 }
|
|
|
415
|
|
|
416 pc->cached = 0;
|
|
|
417 pc->connection = NULL;
|
|
|
418
|
|
326
|
419 if (rrp->peers->single) {
|
|
260
|
420 peer = &rrp->peers->peer[0];
|
|
|
421
|
|
|
422 } else {
|
|
|
423
|
|
|
424 /* there are several peers */
|
|
|
425
|
|
|
426 if (pc->tries == rrp->peers->number) {
|
|
|
427
|
|
|
428 /* it's a first try - get a current peer */
|
|
|
429
|
|
330
|
430 i = pc->tries;
|
|
|
431
|
|
260
|
432 for ( ;; ) {
|
|
324
|
433 rrp->current = ngx_http_upstream_get_peer(rrp->peers);
|
|
|
434
|
|
|
435 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
|
436 "get rr peer, current: %ui %i",
|
|
|
437 rrp->current,
|
|
|
438 rrp->peers->peer[rrp->current].current_weight);
|
|
260
|
439
|
|
|
440 n = rrp->current / (8 * sizeof(uintptr_t));
|
|
302
|
441 m = (uintptr_t) 1 << rrp->current % (8 * sizeof(uintptr_t));
|
|
260
|
442
|
|
|
443 if (!(rrp->tried[n] & m)) {
|
|
|
444 peer = &rrp->peers->peer[rrp->current];
|
|
|
445
|
|
|
446 if (!peer->down) {
|
|
|
447
|
|
|
448 if (peer->max_fails == 0
|
|
|
449 || peer->fails < peer->max_fails)
|
|
|
450 {
|
|
|
451 break;
|
|
|
452 }
|
|
|
453
|
|
644
|
454 if (now - peer->checked > peer->fail_timeout) {
|
|
|
455 peer->checked = now;
|
|
260
|
456 break;
|
|
|
457 }
|
|
|
458
|
|
324
|
459 peer->current_weight = 0;
|
|
|
460
|
|
260
|
461 } else {
|
|
|
462 rrp->tried[n] |= m;
|
|
|
463 }
|
|
|
464
|
|
|
465 pc->tries--;
|
|
|
466 }
|
|
|
467
|
|
330
|
468 if (pc->tries == 0) {
|
|
|
469 goto failed;
|
|
260
|
470 }
|
|
|
471
|
|
330
|
472 if (--i == 0) {
|
|
|
473 ngx_log_error(NGX_LOG_ALERT, pc->log, 0,
|
|
|
474 "round robin upstream stuck on %ui tries",
|
|
|
475 pc->tries);
|
|
|
476 goto failed;
|
|
|
477 }
|
|
260
|
478 }
|
|
|
479
|
|
|
480 peer->current_weight--;
|
|
|
481
|
|
|
482 } else {
|
|
330
|
483
|
|
|
484 i = pc->tries;
|
|
|
485
|
|
260
|
486 for ( ;; ) {
|
|
|
487 n = rrp->current / (8 * sizeof(uintptr_t));
|
|
302
|
488 m = (uintptr_t) 1 << rrp->current % (8 * sizeof(uintptr_t));
|
|
260
|
489
|
|
|
490 if (!(rrp->tried[n] & m)) {
|
|
|
491
|
|
|
492 peer = &rrp->peers->peer[rrp->current];
|
|
|
493
|
|
|
494 if (!peer->down) {
|
|
|
495
|
|
|
496 if (peer->max_fails == 0
|
|
|
497 || peer->fails < peer->max_fails)
|
|
|
498 {
|
|
|
499 break;
|
|
|
500 }
|
|
|
501
|
|
644
|
502 if (now - peer->checked > peer->fail_timeout) {
|
|
|
503 peer->checked = now;
|
|
260
|
504 break;
|
|
|
505 }
|
|
|
506
|
|
324
|
507 peer->current_weight = 0;
|
|
|
508
|
|
260
|
509 } else {
|
|
|
510 rrp->tried[n] |= m;
|
|
|
511 }
|
|
|
512
|
|
|
513 pc->tries--;
|
|
|
514 }
|
|
|
515
|
|
|
516 rrp->current++;
|
|
|
517
|
|
|
518 if (rrp->current >= rrp->peers->number) {
|
|
|
519 rrp->current = 0;
|
|
|
520 }
|
|
|
521
|
|
330
|
522 if (pc->tries == 0) {
|
|
|
523 goto failed;
|
|
260
|
524 }
|
|
|
525
|
|
330
|
526 if (--i == 0) {
|
|
|
527 ngx_log_error(NGX_LOG_ALERT, pc->log, 0,
|
|
|
528 "round robin upstream stuck on %ui tries",
|
|
|
529 pc->tries);
|
|
|
530 goto failed;
|
|
|
531 }
|
|
260
|
532 }
|
|
|
533
|
|
|
534 peer->current_weight--;
|
|
|
535 }
|
|
|
536
|
|
|
537 rrp->tried[n] |= m;
|
|
|
538 }
|
|
|
539
|
|
|
540 pc->sockaddr = peer->sockaddr;
|
|
|
541 pc->socklen = peer->socklen;
|
|
|
542 pc->name = &peer->name;
|
|
|
543
|
|
|
544 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
|
545
|
|
326
|
546 if (pc->tries == 1 && rrp->peers->next) {
|
|
|
547 pc->tries += rrp->peers->next->number;
|
|
|
548
|
|
|
549 n = rrp->peers->next->number / (8 * sizeof(uintptr_t)) + 1;
|
|
|
550 for (i = 0; i < n; i++) {
|
|
|
551 rrp->tried[i] = 0;
|
|
|
552 }
|
|
|
553 }
|
|
|
554
|
|
260
|
555 return NGX_OK;
|
|
|
556
|
|
|
557 failed:
|
|
|
558
|
|
326
|
559 peers = rrp->peers;
|
|
|
560
|
|
|
561 if (peers->next) {
|
|
|
562
|
|
|
563 /* ngx_unlock_mutex(peers->mutex); */
|
|
|
564
|
|
|
565 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, "backup servers");
|
|
|
566
|
|
|
567 rrp->peers = peers->next;
|
|
|
568 pc->tries = rrp->peers->number;
|
|
|
569
|
|
|
570 n = rrp->peers->number / (8 * sizeof(uintptr_t)) + 1;
|
|
|
571 for (i = 0; i < n; i++) {
|
|
|
572 rrp->tried[i] = 0;
|
|
|
573 }
|
|
|
574
|
|
|
575 rc = ngx_http_upstream_get_round_robin_peer(pc, rrp);
|
|
|
576
|
|
|
577 if (rc != NGX_BUSY) {
|
|
|
578 return rc;
|
|
|
579 }
|
|
|
580
|
|
|
581 /* ngx_lock_mutex(peers->mutex); */
|
|
|
582 }
|
|
|
583
|
|
260
|
584 /* all peers failed, mark them as live for quick recovery */
|
|
|
585
|
|
326
|
586 for (i = 0; i < peers->number; i++) {
|
|
|
587 peers->peer[i].fails = 0;
|
|
260
|
588 }
|
|
|
589
|
|
326
|
590 /* ngx_unlock_mutex(peers->mutex); */
|
|
260
|
591
|
|
326
|
592 pc->name = peers->name;
|
|
260
|
593
|
|
|
594 return NGX_BUSY;
|
|
|
595 }
|
|
|
596
|
|
|
597
|
|
324
|
598 static ngx_uint_t
|
|
|
599 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peers_t *peers)
|
|
|
600 {
|
|
634
|
601 ngx_uint_t i, n, reset = 0;
|
|
324
|
602 ngx_http_upstream_rr_peer_t *peer;
|
|
|
603
|
|
|
604 peer = &peers->peer[0];
|
|
|
605
|
|
|
606 for ( ;; ) {
|
|
|
607
|
|
|
608 for (i = 0; i < peers->number; i++) {
|
|
|
609
|
|
|
610 if (peer[i].current_weight <= 0) {
|
|
|
611 continue;
|
|
|
612 }
|
|
|
613
|
|
|
614 n = i;
|
|
|
615
|
|
|
616 while (i < peers->number - 1) {
|
|
|
617
|
|
|
618 i++;
|
|
|
619
|
|
|
620 if (peer[i].current_weight <= 0) {
|
|
|
621 continue;
|
|
|
622 }
|
|
|
623
|
|
|
624 if (peer[n].current_weight * 1000 / peer[i].current_weight
|
|
336
|
625 > peer[n].weight * 1000 / peer[i].weight)
|
|
324
|
626 {
|
|
|
627 return n;
|
|
|
628 }
|
|
|
629
|
|
|
630 n = i;
|
|
|
631 }
|
|
|
632
|
|
|
633 if (peer[i].current_weight > 0) {
|
|
|
634 n = i;
|
|
|
635 }
|
|
|
636
|
|
|
637 return n;
|
|
|
638 }
|
|
|
639
|
|
634
|
640 if (reset++) {
|
|
|
641 return 0;
|
|
|
642 }
|
|
|
643
|
|
324
|
644 for (i = 0; i < peers->number; i++) {
|
|
364
|
645 peer[i].current_weight = peer[i].weight;
|
|
324
|
646 }
|
|
|
647 }
|
|
|
648 }
|
|
|
649
|
|
|
650
|
|
260
|
651 void
|
|
|
652 ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, void *data,
|
|
|
653 ngx_uint_t state)
|
|
|
654 {
|
|
|
655 ngx_http_upstream_rr_peer_data_t *rrp = data;
|
|
|
656
|
|
|
657 time_t now;
|
|
|
658 ngx_http_upstream_rr_peer_t *peer;
|
|
|
659
|
|
|
660 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
|
661 "free rr peer %ui %ui", pc->tries, state);
|
|
|
662
|
|
|
663 if (state == 0 && pc->tries == 0) {
|
|
|
664 return;
|
|
|
665 }
|
|
|
666
|
|
|
667 /* TODO: NGX_PEER_KEEPALIVE */
|
|
|
668
|
|
326
|
669 if (rrp->peers->single) {
|
|
260
|
670 pc->tries = 0;
|
|
|
671 return;
|
|
|
672 }
|
|
|
673
|
|
644
|
674 peer = &rrp->peers->peer[rrp->current];
|
|
|
675
|
|
260
|
676 if (state & NGX_PEER_FAILED) {
|
|
|
677 now = ngx_time();
|
|
|
678
|
|
|
679 /* ngx_lock_mutex(rrp->peers->mutex); */
|
|
|
680
|
|
|
681 peer->fails++;
|
|
|
682 peer->accessed = now;
|
|
644
|
683 peer->checked = now;
|
|
260
|
684
|
|
400
|
685 if (peer->max_fails) {
|
|
|
686 peer->current_weight -= peer->weight / peer->max_fails;
|
|
|
687 }
|
|
324
|
688
|
|
|
689 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
|
690 "free rr peer failed: %ui %i",
|
|
|
691 rrp->current, peer->current_weight);
|
|
|
692
|
|
|
693 if (peer->current_weight < 0) {
|
|
|
694 peer->current_weight = 0;
|
|
260
|
695 }
|
|
|
696
|
|
|
697 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
644
|
698
|
|
|
699 } else {
|
|
|
700
|
|
|
701 /* mark peer live if check passed */
|
|
|
702
|
|
|
703 if (peer->accessed < peer->checked) {
|
|
|
704 peer->fails = 0;
|
|
|
705 }
|
|
260
|
706 }
|
|
|
707
|
|
|
708 rrp->current++;
|
|
|
709
|
|
|
710 if (rrp->current >= rrp->peers->number) {
|
|
|
711 rrp->current = 0;
|
|
|
712 }
|
|
|
713
|
|
|
714 if (pc->tries) {
|
|
|
715 pc->tries--;
|
|
|
716 }
|
|
|
717
|
|
|
718 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
|
719 }
|
|
|
720
|
|
|
721
|
|
|
722 #if (NGX_HTTP_SSL)
|
|
|
723
|
|
318
|
724 ngx_int_t
|
|
|
725 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc,
|
|
|
726 void *data)
|
|
260
|
727 {
|
|
|
728 ngx_http_upstream_rr_peer_data_t *rrp = data;
|
|
|
729
|
|
318
|
730 ngx_int_t rc;
|
|
260
|
731 ngx_ssl_session_t *ssl_session;
|
|
|
732 ngx_http_upstream_rr_peer_t *peer;
|
|
|
733
|
|
318
|
734 peer = &rrp->peers->peer[rrp->current];
|
|
|
735
|
|
|
736 /* TODO: threads only mutex */
|
|
|
737 /* ngx_lock_mutex(rrp->peers->mutex); */
|
|
|
738
|
|
|
739 ssl_session = peer->ssl_session;
|
|
|
740
|
|
|
741 rc = ngx_ssl_set_session(pc->connection, ssl_session);
|
|
|
742
|
|
|
743 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
332
|
744 "set session: %p:%d",
|
|
|
745 ssl_session, ssl_session ? ssl_session->references : 0);
|
|
318
|
746
|
|
|
747 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
|
748
|
|
|
749 return rc;
|
|
|
750 }
|
|
|
751
|
|
|
752
|
|
|
753 void
|
|
|
754 ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc,
|
|
|
755 void *data)
|
|
|
756 {
|
|
|
757 ngx_http_upstream_rr_peer_data_t *rrp = data;
|
|
|
758
|
|
|
759 ngx_ssl_session_t *old_ssl_session, *ssl_session;
|
|
|
760 ngx_http_upstream_rr_peer_t *peer;
|
|
|
761
|
|
260
|
762 ssl_session = ngx_ssl_get_session(pc->connection);
|
|
|
763
|
|
|
764 if (ssl_session == NULL) {
|
|
|
765 return;
|
|
|
766 }
|
|
|
767
|
|
318
|
768 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
332
|
769 "save session: %p:%d", ssl_session, ssl_session->references);
|
|
318
|
770
|
|
260
|
771 peer = &rrp->peers->peer[rrp->current];
|
|
|
772
|
|
318
|
773 /* TODO: threads only mutex */
|
|
260
|
774 /* ngx_lock_mutex(rrp->peers->mutex); */
|
|
318
|
775
|
|
|
776 old_ssl_session = peer->ssl_session;
|
|
260
|
777 peer->ssl_session = ssl_session;
|
|
318
|
778
|
|
260
|
779 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
|
780
|
|
318
|
781 if (old_ssl_session) {
|
|
|
782
|
|
|
783 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
332
|
784 "old session: %p:%d",
|
|
318
|
785 old_ssl_session, old_ssl_session->references);
|
|
|
786
|
|
260
|
787 /* TODO: may block */
|
|
318
|
788
|
|
|
789 ngx_ssl_free_session(old_ssl_session);
|
|
260
|
790 }
|
|
|
791 }
|
|
|
792
|
|
632
|
793
|
|
|
794 static ngx_int_t
|
|
|
795 ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc, void *data)
|
|
|
796 {
|
|
|
797 return NGX_OK;
|
|
|
798 }
|
|
|
799
|
|
|
800
|
|
|
801 static void
|
|
|
802 ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc, void *data)
|
|
|
803 {
|
|
|
804 return;
|
|
|
805 }
|
|
|
806
|
|
260
|
807 #endif
|
