nginx [emerg] invalid host in upstream

sunnygupta.kr · 2015-09-06T05:37:36+00:00

Thanks agentzh,Your feedback really helps. Cheers,MartinOn Friday, September 4, 2015 at 2:53:29 PM UTC-5, Martin Gee wrote:I have a use-case where...

nginx [emerg] invalid host in upstream

sunnygupta.kr

#### nginx.conf

http {


    lua_package_path "./lua/?.lua;;";

    resolver 8.8.8.8;

    #Basic reverse proxy server
    upstream backend{
        server  http://0.0.0.0:5000/api/v1/ssjs; #some remote server
    }


    server {
        listen 8080;
        lua_code_cache off; # for development only

        location / {
            content_by_lua_file ./lua/nginx_ss.lua;
        }

        #Proxy_pass the request to remote server
        location /v1/secure/proxy_shield_square/ {
            internal;
            resolver 8.8.8.8;
            #### Any remote server end-point
            proxy_set_header HOST $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

            proxy_pass   http://backend;
            #proxy_pass  http://some.remoteserver.com/serverendpoint;
            # http://0.0.0.0:5000/api/v1/ssjs;
        }

    }


#in nginx_ss.lua file . I am catching incoming req making some changes in header, setting new body and passing to location.capture 
# /v1/secure/proxy_shield_square/ that is supposed to proxy pass my request to remote server

#############################################
# this is nginx_ss.lua 

# body preparation as string in json format
local final_json = table.concat(api_table);
--ngx.print(final_json);

ngx.req.read_body();

local res = ngx.location.capture("/v1/secure/proxy_shield_square/", { body = final_json });
ngx.say("\n\n--------Response Headers from Remote server-------------");
ngx.say("status : ", res.status);
ngx.say("method : ", res.method);
ngx.say("body :", res.body);

for k,v in pairs(res.header) do
    ngx.say(k,'-', v);
end

##################################################
Command to reload nginx conf
$ nginx -p `pwd` -s reload

nginx: [emerg] invalid host in upstream "http://0.0.0.0:5000/api/v1/ssjs" in /home/lautner/CodeCave/open_nginx/conf/nginx.conf:15

Is there is something wrong i am doing right now?
when i proxy_pass directly this http://0.0.0.0:5000/api/v1/ssjs , i am getting all request at this running server locally. 
but when using upstream directive, it throwing this above error. Please someone having this knowledge regarding this issue, help me out? Thanks%

doujiang24

Hi,

http://nginx.org/en/docs/http/ngx_http_upstream_module.html#upstream

You can try like this:

upstream backend {

server 0.0.0.0:5000;

}

proxy_pass http://backend/api/v1/ss.js;

2015-09-06 5:37 GMT+08:00 Sunny GUPTA <sunnyg...@gmail.com>:

#### nginx.conf http { lua_package_path "./lua/?.lua;;"; resolver 8.8.8.8; #Basic reverse proxy server upstream backend{ server http://0.0.0.0:5000/api/v1/ssjs; #some remote server } server { listen 8080; lua_code_cache off; # for development only location / { content_by_lua_file ./lua/nginx_ss.lua; } #Proxy_pass the request to remote server location /v1/secure/proxy_shield_square/ { internal; resolver 8.8.8.8; #### Any remote server end-point proxy_set_header HOST $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_pass http://backend; #proxy_pass http://some.remoteserver.com/serverendpoint; # http://0.0.0.0:5000/api/v1/ssjs; } } #in nginx_ss.lua file . I am catching incoming req making some changes in header, setting new body and passing to location.capture # /v1/secure/proxy_shield_square/ that is supposed to proxy pass my request to remote server ############################################# # this is nginx_ss.lua # body preparation as string in json format local final_json = table.concat(api_table); --ngx.print(final_json); ngx.req.read_body(); local res = ngx.location.capture("/v1/secure/proxy_shield_square/", { body = final_json }); ngx.say("\n\n--------Response Headers from Remote server-------------"); ngx.say("status : ", res.status); ngx.say("method : ", res.method); ngx.say("body :", res.body); for k,v in pairs(res.header) do ngx.say(k,'-', v); end ################################################## Command to reload nginx conf $ nginx -p `pwd` -s reload nginx: [emerg] invalid host in upstream "http://0.0.0.0:5000/api/v1/ssjs" in /home/lautner/CodeCave/open_nginx/conf/nginx.conf:15 Is there is something wrong i am doing right now? when i proxy_pass directly this http://0.0.0.0:5000/api/v1/ssjs , i am getting all request at this running server locally. but when using upstream directive, it throwing this above error. Please someone having this knowledge regarding this issue, help me out? Thanks%

.

sunnygupta.kr

Thanks DeJiang, its working now.. But what about my actual server endpoint. that is something like http://servername.com/getdata ; do i need to mention the ip address of that server_name that correspond to that server?

On Sunday, September 6, 2015 at 3:07:36 AM UTC+5:30, Sunny GUPTA wrote:

#### nginx.conf http { lua_package_path "./lua/?.lua;;"; resolver 8.8.8.8; #Basic reverse proxy server upstream backend{ server http://0.0.0.0:5000/api/v1/ssjs; #some remote server } server { listen 8080; lua_code_cache off; # for development only location / { content_by_lua_file ./lua/nginx_ss.lua; } #Proxy_pass the request to remote server location /v1/secure/proxy_shield_square/ { internal; resolver 8.8.8.8; #### Any remote server end-point proxy_set_header HOST $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_pass http://backend; #proxy_pass http://some.remoteserver.com/serverendpoint; # http://0.0.0.0:5000/api/v1/ssjs; } } #in nginx_ss.lua file . I am catching incoming req making some changes in header, setting new body and passing to location.capture # /v1/secure/proxy_shield_square/ that is supposed to proxy pass my request to remote server ############################################# # this is nginx_ss.lua # body preparation as string in json format local final_json = table.concat(api_table); --ngx.print(final_json); ngx.req.read_body(); local res = ngx.location.capture("/v1/secure/proxy_shield_square/", { body = final_json }); ngx.say("\n\n--------Response Headers from Remote server-------------"); ngx.say("status : ", res.status); ngx.say("method : ", res.method); ngx.say("body :", res.body); for k,v in pairs(res.header) do ngx.say(k,'-', v); end ################################################## Command to reload nginx conf $ nginx -p `pwd` -s reload nginx: [emerg] invalid host in upstream "http://0.0.0.0:5000/api/v1/ssjs" in /home/lautner/CodeCave/open_nginx/conf/nginx.conf:15 Is there is something wrong i am doing right now? when i proxy_pass directly this http://0.0.0.0:5000/api/v1/ssjs , i am getting all request at this running server locally. but when using upstream directive, it throwing this above error. Please someone having this knowledge regarding this issue, help me out? Thanks%