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