Кто нибудь использовал nginx_upstream_check_module?

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Я собрал nginx 1.14 и nginx 1.16 c nginx_upstream_check_module из мастер ветки c помощью https://github.com/TinkoffCreditSystems/Nginx-builder

Конфиг Nginx-builder:

nginx_version: 1.14.2
output_package: rpm
modules:
  - module:
      name: nginx-module-vts
      git_url: https://github.com/vozlt/nginx-module-vts.git
      git_tag: v0.1.18
  - module:
      name: nginx_upstream_check_module
      git_url: https://github.com/yaoweibin/nginx_upstream_check_module.git
      git_branch: master

Для эмуляции сервиса использовал mockify. Конфиг mockify:

routes200.yaml:

---
- route: "/"
  methods:
    - GET
  responses:
    - uri: "/"
      method: GET
      statusCode: 200
      body:
        message: 200\n

routes503.yaml:

---
- route: "/"
  methods:
    - GET
  responses:
    - uri: "/"
      method: GET
      statusCode: 503
      body:
        message: 503\n

Конфиг nginx.conf:

user  nginx;
worker_processes  auto;
worker_rlimit_nofile 40960;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    use epoll;
    worker_connections 1024;
    multi_accept on;
}

http {
    vhost_traffic_status_zone;
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log /var/log/nginx/access.log main;
    #access_log off;

    sendfile on;
    tcp_nodelay on;
    tcp_nopush on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;
    open_file_cache max=200000 inactive=20s;
    open_file_cache_valid 30s;
    open_file_cache_min_uses 2;
    open_file_cache_errors on;

}

Конфиг виртуального хоста:

upstream backend {
    server 127.0.0.1:8002; # 200 http code
    server 127.0.0.1:8003; # 200 http code
    server 127.0.0.1:8004; # 200 http code
    server 127.0.0.1:8005; # 200 http code
    server 127.0.0.1:8006; # 503 http code
    check interval=3000 rise=2 fall=5 timeout=1000 default_down=true type=http;
    check_http_send "HEAD / HTTP/1.0\r\n\r\n";
    check_http_expect_alive http_2xx http_3xx;
}

server {
    listen   80;
    server_name vhost1;
    location / {
            proxy_pass http://backend;
    }

    location /status {
        check_status;
    }

}

Запускаю проверку с помощью curl в цикле:

while true; do curl -i  http://vhost1/; sleep 1; done

Получаю вот что:

200\nHTTP/1.1 200 OK
Server: nginx/1.14.2
Date: Tue, 19 Nov 2019 12:50:05 GMT
Content-Type: text/plain; charset=utf-8
Content-Length: 5
Connection: keep-alive

200\nHTTP/1.1 503 Service Unavailable
Server: nginx/1.14.2
Date: Tue, 19 Nov 2019 12:50:06 GMT
Content-Type: text/plain; charset=utf-8
Content-Length: 5
Connection: keep-alive

503\nHTTP/1.1 503 Service Unavailable
Server: nginx/1.14.2
Date: Tue, 19 Nov 2019 12:50:07 GMT
Content-Type: text/plain; charset=utf-8
Content-Length: 5
Connection: keep-alive

Проверка модулей:

nginx -V
nginx version: nginx/1.14.2
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC) 
configure arguments: 
--prefix=/etc/nginx 
--sbin-path=/usr/sbin/nginx 
--conf-path=/etc/nginx/nginx.conf 
--modules-path=/usr/lib/nginx/modules 
--error-log-path=/var/log/nginx/error.log 
--pid-path=/var/run/nginx.pid 
--lock-path=/var/lock/nginx.lock 
--http-log-path=/var/log/nginx/access.log 
--http-client-body-temp-path=/var/cache/nginx/client_temp 
--http-proxy-temp-path=/var/cache/nginx/proxy_temp 
--http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp 
--http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp 
--http-scgi-temp-path=/var/cache/nginx/scgi_temp 
--with-debug 
--user=nginx 
--group=nginx 
--with-pcre-jit 
--with-compat 
--with-file-aio 
--with-threads 
--with-stream 
--with-cc-opt= 
--with-ld-opt= 
--add-module=/root/rpmbuild/SOURCES/modules/nginx-module-vts 
--add-module=/root/rpmbuild/SOURCES/modules/nginx_upstream_check_module 
--with-cc-opt='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong 
--param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -fPIC' 
--with-ld-opt='-Wl,-z,relro -Wl,-z,now -pie'

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