Доброго дня!
Решили попробовать nginx plus и модуль healt_heck.
Собственно отрывок из конфига:
match backend {
status 200-403;
}
upstream backend {
zone upstream_backend 64k;
queue 1024;
server .... slow_start=60s max_cons=1024;
least_conn;
}
server {
listen 80;
location / {
health_check match=backend;
proxy_pass http://backend;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_connect_timeout 1s;
proxy_next_upstream error timeout invalid_header;
proxy_http_version 1.1;
proxy_set_header Connection "";
proxy_buffers 4 256k;
}
location = /status {
stub_status on;
access_log off;
}
location = /status.json {
status;
}
location /upstream_conf {
upstream_conf;
}
}
Есть часть бэкендов которые в данный момент выключены физически, но они прописаны в upstream backend. При этом запросы на эти бэкенды продолжают сыпаться, а health_check не отправляет health requests на бэкенды, о чем можно догадаться прочитав статус:
{
"active": 0,
"backup": false,
"downstart": 1407244491219,
"downtime": 515646,
"fails": 78,
"health_checks": {
"checks": 0,
"fails": 0,
"unhealthy": 0
},
"id": 28,
"keepalive": 0,
"max_conns": 1024,
"received": 0,
"requests": 78,
"responses": {
"1xx": 0,
"2xx": 0,
"3xx": 0,
"4xx": 0,
"5xx": 0,
"total": 0
},
"sent": 0,
"server": "....:80",
"state": "unavail",
"unavail": 1,
"weight": 1
}
root@<hostname>:/etc/nginx# uname -a
Linux <hostname> 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
root@<hostname>:/etc/nginx# nginx -V
nginx version: nginx/1.7.3 (nginx-plus-r4)
built by gcc 4.8.2 (Ubuntu 4.8.2-19ubuntu1)
TLS SNI support enabled
configure arguments: --build=nginx-plus-r4 --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --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 --user=nginx --group=nginx --with-http_ssl_module --with-http_realip_module --with-http_addition_module --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_f4f_module --with-http_hls_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_session_log_module --with-http_stub_status_module --with-http_auth_request_module --with-mail --with-mail_ssl_module --with-file-aio --with-http_spdy_module --with-ipv6 --with-cc-opt='-g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,--as-needed'
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