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ssl - nginx stream_ssl_preread 模块无法读取 ssl_preread_server_name

转载 作者:太空宇宙 更新时间:2023-11-03 14:27:39 29 4
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我正在尝试设置 nginx 以根据 SNI 服务器名称将 TLS 连接映射到不同的后端。据我所知,我的客户端正在发送服务器名称,但预读模块只读取一个连字符。

这是我的 nginx 配置:

stream  {
map_hash_bucket_size 64;

############################################################
### logging
log_format log_stream '$remote_addr [$time_local] $protocol [$ssl_preread_server_name] [$ssl_preread_alpn_protocols] [$instanceport] '
'$status $bytes_sent $bytes_received $session_time';

error_log /usr/home/glance/Logs/pservernginx.error.log info;
access_log /usr/home/glance/Logs/pservernginx.access.log log_stream;

############################################################
### ssl configuration

ssl_certificate /usr/home/glance/GlanceReleases/star.myglance.org.pem;
ssl_certificate_key /usr/home/glance/GlanceReleases/star.myglance.org.pem;

ssl_protocols TLSv1.1 TLSv1.2;
ssl_ciphers HIGH:!aNULL:!MD5:!RC4;

limit_conn_zone $binary_remote_addr zone=ip_addr:10m;

########################################################################
### Raw TLS PServer Connections
### Listen for TLS on 5501 and forward to TCP sock 6500 (socket port)

### https://nginx.org/en/docs/stream/ngx_stream_ssl_preread_module.html
map $ssl_preread_server_name $instanceport {
presence.myglance.org 6500;
presence-1.myglance.org 6501;
presence-2.myglance.org 6502;
default glance-no-upstream-instance-configured;
}

server {

listen 5501 ssl;
ssl_preread on;
proxy_connect_timeout 20s; # max time to connect to pserver
proxy_timeout 30s; # max time between successive reads or writes
proxy_pass 127.0.0.1:$instanceport;
}
}

wireshark 显示服务器名称 header : enter image description here

nginx 访问日志只显示预读变量的连字符:

108.49.96.66 [12/Apr/2019:11:50:58 +0000] TCP [-] [-] [glance-no-upstream-instance-configured] 500 0 0 0.066

我在 FreeBSD 上运行 nginx 1.14.2。我如何调试预读模块中发生的事情?

================更新===============打开调试日志记录。也许 “ssl preread: not a handshake” 是一个线索。

2019/04/12 14:49:50 [info] 61420#0: *9 client 108.49.96.66:54740 connected to 0.0.0.0:5501
2019/04/12 14:49:50 [debug] 61420#0: *9 posix_memalign: 0000000801C35000:256 @16
2019/04/12 14:49:50 [debug] 61419#0: accept on 0.0.0.0:5501, ready: 1
2019/04/12 14:49:50 [debug] 61419#0: accept() not ready (35: Resource temporarily unavailable)
2019/04/12 14:49:50 [debug] 61420#0: *9 posix_memalign: 0000000801C35600:256 @16
2019/04/12 14:49:50 [debug] 61420#0: *9 generic phase: 0
2019/04/12 14:49:50 [debug] 61420#0: *9 generic phase: 1
2019/04/12 14:49:50 [debug] 61420#0: *9 generic phase: 2
2019/04/12 14:49:50 [debug] 61420#0: *9 tcp_nodelay
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_do_handshake: -1
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_get_error: 2
2019/04/12 14:49:50 [debug] 61420#0: *9 kevent set event: 5: ft:-1 fl:0025
2019/04/12 14:49:50 [debug] 61420#0: *9 event timer add: 5: 60000:29203481224
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL handshake handler: 0
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_do_handshake: 1
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL: TLSv1.2, cipher: "ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD"
2019/04/12 14:49:50 [debug] 61420#0: *9 event timer del: 5: 29203481224
2019/04/12 14:49:50 [debug] 61420#0: *9 generic phase: 2
2019/04/12 14:49:50 [debug] 61420#0: *9 ssl preread handler
2019/04/12 14:49:50 [debug] 61420#0: *9 malloc: 0000000801CFF000:16384
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_read: -1
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_get_error: 2
2019/04/12 14:49:50 [debug] 61420#0: *9 ssl preread handler
2019/04/12 14:49:50 [debug] 61420#0: *9 posix_memalign: 0000000801C35900:256 @16
2019/04/12 14:49:50 [debug] 61420#0: *9 event timer add: 5: 30000:29203451252
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_read: 81
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_read: -1
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_get_error: 2
2019/04/12 14:49:50 [debug] 61420#0: *9 ssl preread handler
2019/04/12 14:49:50 [debug] 61420#0: *9 ssl preread: not a handshake
2019/04/12 14:49:50 [debug] 61420#0: *9 event timer del: 5: 29203451252
2019/04/12 14:49:50 [debug] 61420#0: *9 proxy connection handler
2019/04/12 14:49:50 [debug] 61420#0: *9 malloc: 0000000801DF7000:400
2019/04/12 14:49:50 [debug] 61420#0: *9 malloc: 0000000801CD9000:16384
2019/04/12 14:49:50 [debug] 61420#0: *9 stream map started
2019/04/12 14:49:50 [debug] 61420#0: *9 stream map: "" "glance-no-upstream-instance-configured"

================= 更新 2 ======================

我用

测试过
openssl s_client -connect ... -servername ...

而不是我的客户。现在看来预读模块阻塞等待数据30秒(错误码2为WANT_READ):

2019/04/23 13:04:30 [debug] 61419#0: *12844 SSL: TLSv1.2, cipher: "ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD"
2019/04/23 13:04:30 [debug] 61419#0: *12844 event timer del: 3: 30147561850
2019/04/23 13:04:30 [debug] 61419#0: *12844 generic phase: 2
2019/04/23 13:04:30 [debug] 61419#0: *12844 ssl preread handler
2019/04/23 13:04:30 [debug] 61419#0: *12844 malloc: 0000000801CA6140:16384
2019/04/23 13:04:30 [debug] 61419#0: *12844 SSL_read: -1
2019/04/23 13:04:30 [debug] 61419#0: *12844 SSL_get_error: 2
2019/04/23 13:04:30 [debug] 61419#0: *12844 ssl preread handler
2019/04/23 13:04:30 [debug] 61419#0: *12844 posix_memalign: 0000000801DB3400:256 @16
2019/04/23 13:04:30 [debug] 61419#0: *12844 event timer add: 3: 30000:30147531898
2019/04/23 13:05:00 [debug] 61419#0: *12844 event timer del: 3: 30147531898
2019/04/23 13:05:00 [debug] 61419#0: *12844 finalize stream session: 200
2019/04/23 13:05:00 [debug] 61419#0: *12844 stream log handler
2019/04/23 13:05:00 [debug] 61419#0: *12844 stream map started
2019/04/23 13:05:00 [debug] 61419#0: *12844 stream script var: ""

最佳答案

我发现了问题:

listen                  5501 **ssl**;
ssl_preread on;
listen 指令中的

ssl 导致 nginx 服务器执行 ssl 握手。当通知预读模块时,握手字节已经被消耗掉,这与我看到的行为完全一致。就我而言,我仍然希望 nginx 卸载加密。所以我创建了一组 nginx 服务器指令来终止 ssl 连接,然后再传递到我的后端。这是修复后我的 nginx 配置的相关部分。请注意,最后一个服务器指令(使用 ssl_preread 的指令)不会终止 SSL 连接。

########################################################################
### TLS Connections
### Listen for TLS on 5501 and forward to TCP sock 6500 (socket port)

### https://nginx.org/en/docs/stream/ngx_stream_ssl_preread_module.html
map $ssl_preread_server_name $instanceport {
presence.myglance.org 5502;
presence-1.myglance.org 5503;
presence-2.myglance.org 5504;
default glance-no-upstream-instance-configured;
}

server {
listen 5502 ssl;
ssl_preread off;
proxy_pass 127.0.0.1:6502;
}

server {
listen 5503 ssl;
ssl_preread off;
proxy_pass 127.0.0.1:6503;
}

server {
listen 5504 ssl;
ssl_preread off;
proxy_pass 127.0.0.1:6504;
}

server {
listen 5501;
ssl_preread on;
proxy_connect_timeout 20s; # max time to connect to pserver
proxy_timeout 30s; # max time between successive reads or writes
proxy_pass 127.0.0.1:$instanceport;
}

关于ssl - nginx stream_ssl_preread 模块无法读取 ssl_preread_server_name,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55651402/

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