Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_stub_status_module.c @ 4622:0dfdc3f732cb
Upstream: fixed ip_hash rebalancing with the "down" flag.
Due to weight being set to 0 for down peers, order of peers after sorting
wasn't the same as without the "down" flag (with down peers at the end),
resulting in client rebalancing for clients on other servers. The only
rebalancing which should happen after adding "down" to a server is one
for clients on the server.
The problem was introduced in r1377 (which fixed endless loop by setting
weight to 0 for down servers). The loop is no longer possible with new
smooth algorithm, so preserving original weight is safe.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 14 May 2012 09:58:07 +0000 |
parents | 2b6cb7528409 |
children | 1c472e3b8c10 |
rev | line source |
---|---|
577 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
577 | 5 */ |
6 | |
487 | 7 |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_http.h> | |
11 | |
12 | |
13 static char *ngx_http_set_status(ngx_conf_t *cf, ngx_command_t *cmd, | |
14 void *conf); | |
577 | 15 |
487 | 16 static ngx_command_t ngx_http_status_commands[] = { |
17 | |
18 { ngx_string("stub_status"), | |
19 NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, | |
20 ngx_http_set_status, | |
21 0, | |
22 0, | |
23 NULL }, | |
24 | |
25 ngx_null_command | |
577 | 26 }; |
487 | 27 |
28 | |
577 | 29 |
667 | 30 static ngx_http_module_t ngx_http_stub_status_module_ctx = { |
509 | 31 NULL, /* preconfiguration */ |
32 NULL, /* postconfiguration */ | |
487 | 33 |
34 NULL, /* create main configuration */ | |
35 NULL, /* init main configuration */ | |
577 | 36 |
487 | 37 NULL, /* create server configuration */ |
38 NULL, /* merge server configuration */ | |
577 | 39 |
487 | 40 NULL, /* create location configuration */ |
41 NULL /* merge location configuration */ | |
42 }; | |
43 | |
44 | |
45 ngx_module_t ngx_http_stub_status_module = { | |
509 | 46 NGX_MODULE_V1, |
487 | 47 &ngx_http_stub_status_module_ctx, /* module context */ |
48 ngx_http_status_commands, /* module directives */ | |
49 NGX_HTTP_MODULE, /* module type */ | |
541 | 50 NULL, /* init master */ |
487 | 51 NULL, /* init module */ |
541 | 52 NULL, /* init process */ |
53 NULL, /* init thread */ | |
54 NULL, /* exit thread */ | |
55 NULL, /* exit process */ | |
56 NULL, /* exit master */ | |
57 NGX_MODULE_V1_PADDING | |
487 | 58 }; |
59 | |
60 | |
61 static ngx_int_t ngx_http_status_handler(ngx_http_request_t *r) | |
62 { | |
495 | 63 size_t size; |
64 ngx_int_t rc; | |
65 ngx_buf_t *b; | |
66 ngx_chain_t out; | |
67 ngx_atomic_int_t ap, hn, ac, rq, rd, wr; | |
577 | 68 |
487 | 69 if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) { |
70 return NGX_HTTP_NOT_ALLOWED; | |
71 } | |
72 | |
1370
cc114c85be0f
rename ngx_http_discard_body() to ngx_http_discard_request_body()
Igor Sysoev <igor@sysoev.ru>
parents:
667
diff
changeset
|
73 rc = ngx_http_discard_request_body(r); |
487 | 74 |
1374 | 75 if (rc != NGX_OK) { |
487 | 76 return rc; |
77 } | |
78 | |
3516
dd1570b6f237
ngx_str_set() and ngx_str_null()
Igor Sysoev <igor@sysoev.ru>
parents:
1563
diff
changeset
|
79 ngx_str_set(&r->headers_out.content_type, "text/plain"); |
487 | 80 |
81 if (r->method == NGX_HTTP_HEAD) { | |
82 r->headers_out.status = NGX_HTTP_OK; | |
83 | |
84 rc = ngx_http_send_header(r); | |
85 | |
86 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) { | |
87 return rc; | |
88 } | |
89 } | |
90 | |
495 | 91 size = sizeof("Active connections: \n") + NGX_ATOMIC_T_LEN |
487 | 92 + sizeof("server accepts handled requests\n") - 1 |
495 | 93 + 6 + 3 * NGX_ATOMIC_T_LEN |
94 + sizeof("Reading: Writing: Waiting: \n") + 3 * NGX_ATOMIC_T_LEN; | |
487 | 95 |
501 | 96 b = ngx_create_temp_buf(r->pool, size); |
97 if (b == NULL) { | |
487 | 98 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
99 } | |
100 | |
101 out.buf = b; | |
102 out.next = NULL; | |
103 | |
104 ap = *ngx_stat_accepted; | |
495 | 105 hn = *ngx_stat_handled; |
487 | 106 ac = *ngx_stat_active; |
107 rq = *ngx_stat_requests; | |
108 rd = *ngx_stat_reading; | |
109 wr = *ngx_stat_writing; | |
110 | |
509 | 111 b->last = ngx_sprintf(b->last, "Active connections: %uA \n", ac); |
487 | 112 |
113 b->last = ngx_cpymem(b->last, "server accepts handled requests\n", | |
114 sizeof("server accepts handled requests\n") - 1); | |
115 | |
509 | 116 b->last = ngx_sprintf(b->last, " %uA %uA %uA \n", ap, hn, rq); |
487 | 117 |
509 | 118 b->last = ngx_sprintf(b->last, "Reading: %uA Writing: %uA Waiting: %uA \n", |
493 | 119 rd, wr, ac - (rd + wr)); |
487 | 120 |
121 r->headers_out.status = NGX_HTTP_OK; | |
122 r->headers_out.content_length_n = b->last - b->pos; | |
123 | |
4611
2b6cb7528409
Allows particular modules to handle subrequests properly.
Andrey Belov <defan@nginx.com>
parents:
4412
diff
changeset
|
124 b->last_buf = (r == r->main) ? 1 : 0; |
487 | 125 |
126 rc = ngx_http_send_header(r); | |
127 | |
128 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) { | |
129 return rc; | |
130 } | |
131 | |
1563
022ec9420f80
style fix: remove double semicolons
Igor Sysoev <igor@sysoev.ru>
parents:
1374
diff
changeset
|
132 return ngx_http_output_filter(r, &out); |
487 | 133 } |
134 | |
135 | |
136 static char *ngx_http_set_status(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
137 { | |
138 ngx_http_core_loc_conf_t *clcf; | |
139 | |
140 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module); | |
141 clcf->handler = ngx_http_status_handler; | |
142 | |
143 return NGX_CONF_OK; | |
144 } |