How to make an application be accessed as a sub path of a main application

[meteo...@gmail.com]

Hello, all

I am using CF v1, and we had some requirement like this:

we had several apps and their URLs like

prefix1.abc.com

admin.prefix1.abc.com

We want to make them protected by wildcard "*.abc.com", but "admin.prefix1.abc.com" is not in that case.

An alternative approach we think is, we can proxy request to backend application like this

prefix1.abc.com/admin  ==>>>  admin.prefix1.abc.com

Is it doable?

I tried to add location /admin like below, but it always make the CF components failed to communicate with cloud controller, any suggestion?

server {

    # use chunkin-http

    chunkin on;

    error_page 411 = @my_411_error;

    location @my_411_error {

      chunkin_resume;

    }

    # end of http-chunkin

    listen       80;

    client_max_body_size 1024M;

    server_name  _;

    server_name_in_redirect off;

    #TODO: how to make this internal location totally transparent to outside

    location = /vcapuls {

      internal;

      # We should use rewrite_by_lua to scrub subrequest headers

      # as uls doesn't care those headers at all.

      # Given there are some exceptions to clear some headers,

      # we just leave them as is.

      keepalive_requests 200;

      proxy_pass http://127.0.0.1:8081/;

      # Don't use unix sockets.

      # See https://groups.google.com/a/cloudfoundry.org/forum/?fromgroups=#!topic/vcap-dev/UbcRVnmN4jw

      #proxy_pass http://unix:/tmp/router.sock:/;

    }

    location /nginx {

        autoindex    on;

        root   /var/www;

        expires     max;

    }

    # Make sure there is a /var/www/nginx/404/404.html page

    error_page  404 /nginx/404/404.html;

    location /admin {

    

    }

    location / {

      access_log   /home/ubuntu/cloudfoundry/.deployments/intalio_devbox/log/nginx/nginx_router_access.log main;

      proxy_buffering             off;

      proxy_set_header            Host $host;

      proxy_set_header            X-Real_IP $remote_addr;

      proxy_set_header            X-Forwarded-For $proxy_add_x_forwarded_for;

      proxy_set_header            X-Forwarded-Proto http;

      proxy_redirect              off;

      proxy_connect_timeout       40;

      proxy_send_timeout          480;

      proxy_read_timeout          480;

      set $health_monitor '';

      set $app_id 0;

      if ($http_user_agent = "HTTP-Monitor/1.1") {

        set $health_monitor T;

      }

      if ($http_host = "") {

        set $health_monitor "${health_monitor}T";

      }

      if ($health_monitor = TT) {

        # Trigger a subrequest to sync the latest few stats of the worker to uls,

        # if we have multiple workers, there will be still few stats not synced for

        # the workers which don't get this monitor request.

        access_by_lua '

          local uls = require ("uls")

          ngx.log(ngx.DEBUG, "monitor trigger stats syncup")

          local req = uls.generate_stats_request()

          -- generate one subrequest to uls to update stats

          ngx.location.capture(

            "/vcapuls", { body = req }

          )

        ';

        more_set_input_headers "Authorization: Basic YWRtaW46cGFzc3dvcmQ=";

        rewrite ^.*$ /healthz break;

        proxy_pass                 http://router_status;

      }

      # We intend to have one "if" block to avoid the above monitor location

      # to twist with below upstream locator server handling.

      # ("if" block effectively creates a nested location and will inherit

      # all the rewrite/access phase handlers of outer location)

      if ($health_monitor != TT) {

        # The following variables are used by lua module code.

        # DO NOT remove or rename any of them!

        set $backend_addr ''; # Backend server address returned from uls for this request

        set $uls_req_tags ''; # Request tags returned from uls for this request to catalog statistics

        set $router_ip '';

        set $timestamp 0;

        set $trace '';

        set $sticky '';

        access_by_lua '

          local uls = require ("uls")

          uls.pre_process_subrequest(ngx, "222")

          local req = uls.generate_uls_request(ngx)

          -- generate one subrequest to uls for querying

          local res = ngx.location.capture(

            "/vcapuls", { body = req }

          )

          uls.post_process_subrequest(ngx, res)

        ';

        proxy_pass http://$backend_addr;

        # Handling response from backend servers

        header_filter_by_lua '

          local uls = require ("uls")

          uls.post_process_response(ngx)

        ';

      }

    }

[meteorping]

In simple word, I just want to the sub domain application as a sub path of the main application.

abc.com which is the main application.

sub domain as a sub path

admin.abc.com  ==>>> abc.com/admin

I want to do it in nginx router.

Any suggestion how to do it?

[James Bayer]

since the router doesn't support context path based routing yet, you could have app1 resolve to abc.com and essentially be a proxy. you can write a simple java app to do that with rewrite rules. v1 didn't have buildpacks, so it's not as easy to use something like the https://github.com/cloudfoundry-incubator/staticfile-buildpack

have app2 be admin.abc.com

in app1 rewrite all requests to abc.com/admin and to admin.abc.com and forward

it's really not all that different from the pattern shown here: https://blog.starkandwayne.com/2014/10/31/public-and-private-microservices-on-the-same-cloud-foundry/

except you don't need the 2nd private load balancer

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Thank you,

James Bayer