NGINX heartbeat
upstream springboot {
server 10.3.73.223:8080 max_fails=2 fail_timeout=30s;
server 10.3.73.223:8090 max_fails=2 fail_timeout=30s;
}
server {
listen 80;
server_name localhost;
location /test {
proxy_pass http://springboot;
}
}
In the 30s (fail_timeout, the default value is 10s), NGINX middleware communication fails twice (max_fails, a default value is set to 0 is considered to have been available server), a middleware is considered unavailable
Not available middleware and communications NGINX success twice in the 30s, is considered middleware recovery.
When upstream of a middleware fails to respond, the request will be forwarded to the next station Nginx middleware, until all of the middleware sent a request, if still unable to get a response at this time successful, the client will receive Finally, a response returned intermediate results.