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I'm trying to proxy a backend server running ELK. Here's my environment info:

root@proxy:~#

root@proxy:~# cat /etc/*release

DISTRIB_ID=Ubuntu

DISTRIB_RELEASE=18.04

DISTRIB_CODENAME=bionic

DISTRIB_DESCRIPTION="Ubuntu 18.04.1 LTS"

NAME="Ubuntu"

VERSION="18.04.1 LTS (Bionic Beaver)"

ID=ubuntu

ID_LIKE=debian

PRETTY_NAME="Ubuntu 18.04.1 LTS"

VERSION_ID="18.04"

HOME_URL="https://www.ubuntu.com/"

SUPPORT_URL="https://help.ubuntu.com/"

BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"

PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"

VERSION_CODENAME=bionic

UBUNTU_CODENAME=bionic

root@proxy:~#

root@proxy:~# nginx -v

nginx version: nginx/1.14.0 (Ubuntu)

root@proxy:~#

root@proxy:~# cat /etc/nginx/nginx.conf

user www-data;

worker_processes auto;

pid /run/nginx.pid;

include /etc/nginx/modules-enabled/*.conf;

events {

        worker_connections 768;

}

http {

        sendfile on;

        tcp_nopush on;

        tcp_nodelay on;

        keepalive_timeout 65;

        types_hash_max_size 2048;

        include /etc/nginx/mime.types;

        default_type application/octet-stream;

        ssl_prefer_server_ciphers on;

        access_log /var/log/nginx/access.log;

        error_log /var/log/nginx/error.log;

        gzip on;

        include /etc/nginx/conf.d/*.conf;

        include /etc/nginx/sites-enabled/*;



}

root@proxy:~#

root@proxy:~# cat /etc/nginx/conf.d/elk.conf

server {

    listen 80;

    server_name domain.tld;

    return 301 https://$host$request_uri;

}



server {

    listen 443 default_server ssl;

    server_name domain.tld;



    ssl_certificate /etc/letsencrypt/live/domain.tld/fullchain.pem;

    ssl_certificate_key /etc/letsencrypt/live/domain.tld/privkey.pem;



    location / {

        root /usr/share/nginx/html;

        index index.html;

    }



    location /elk {

        proxy_pass http://1.2.3.4:5601;

        proxy_http_version 1.1;

        proxy_set_header Connection "Keep-Alive";

        proxy_set_header Proxy-Connection "Keep-Alive";

    }

}

root@proxy:~#

With the above configurations, when I go to https://domain.tld, I can view my static site without issues but when I go to https://domain.tld/elk, I get a 404 Not Found. Here's the Raw Data of the 404:

{"statusCode":404,"error":"Not Found","message":"Not Found"}

Here's the Headers:

Connection: keep-alive

Content-Type: application/json; charset=utf-8

Date: Fri, 04 Jan 2019 11:42:55 GMT

Server: nginx/1.14.0 (Ubuntu)

Transfer-Encoding: chunked

cache-control: no-cache

content-encoding: gzip

kbn-name: kibana

kbn-xpack-sig: d39f386737f81acb1fe7cc2cc4d80109

vary: accept-encoding



Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

Accept-Encoding: gzip, deflate, br

Accept-Language: en-US,en;q=0.5

Connection: keep-alive

DNT: 1

Host: domain.tld

Referer: https://domain.tld/

Upgrade-Insecure-Requests: 1

User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:64.0) Gecko/20100101 Firefox/64.0

If I make my config as this:

root@proxy:~# cat /etc/nginx/conf.d/elk.conf

server {

    listen 80;

    server_name domain.tld;

    return 301 https://$host$request_uri;

}



server {

    listen 443 default_server ssl;

    server_name domain.tld;



    ssl_certificate /etc/letsencrypt/live/domain.tld/fullchain.pem;

    ssl_certificate_key /etc/letsencrypt/live/domain.tld/privkey.pem;



    location / {

        proxy_pass http://1.2.3.4:5601;

        proxy_http_version 1.1;

        proxy_set_header Connection "Keep-Alive";

        proxy_set_header Proxy-Connection "Keep-Alive";

    }

}

root@proxy:~#

and go to https://domain.tld, it will proxy back to ELK correctly and the Kibana dashboard loads properly.

Been tinkering around, researched online and adjusted the samples accordingly but cannot make it to work the way I wanted. Appreciate your help. Thanks!

Basically, you need to make two changes to solve the issue. First, please add slashes at the end of location and proxy_pass directive in Nginx server block file as follows:

location /elk/ {

        proxy_pass http://1.2.3.4:5601/;

        proxy_http_version 1.1;

        proxy_set_header Connection "Keep-Alive";

        proxy_set_header Proxy-Connection "Keep-Alive";

}

Second, please uncomment server.basePath setting and give the value of /elk in kibana.yml config file:

server.basePath: "/elk"

Finally, you must restart both Nginx and Kibana before giving it another try.