chore: add nixops ssh wrapper scripts

- add utilities for measuring resource usage
- use root nginx location for nixops

Author: steve-chavez

nix/nginx/conf/custom.conf

@@ -1,3 +1,7 @@
+location / {
+  echo 'Hello world';
+}
+
 location /slow-reply {
   echo_sleep 2;
   echo 'this text will come in response body with HTTP 200 after 2 seconds';

nix/nginx/conf/nginx.conf

@@ -14,10 +14,6 @@ http {
   server {
     listen 8080;
 
-    location / {
-      echo 'Hello world';
-    }
-
     include custom.conf;
   }
 

nix/nixops.nix

@@ -126,6 +126,10 @@ in {
     };
 
     environment.systemPackages = [
+      pkgs.bcc
+      pkgs.pgmetrics
+      pkgs.pg_activity
+      pkgs.htop
       pkgs.vegeta
       (
         pkgs.writeShellScriptBin "vegeta-bench" ''

nix/nixopsScripts.nix

@@ -30,6 +30,15 @@ let
 
         ${nixopsBin} ssh -d pg_net client
       '';
+  nixopsSSHServer =
+    writeShellScriptBin ("net-cloud-ssh-server")
+      ''
+        set -euo pipefail
+
+        cd nix
+
+        ${nixopsBin} ssh -d pg_net server
+      '';
   nixopsReproTimeouts =
     writeShellScriptBin ("net-cloud-reproduce-timeouts")
       ''
@@ -50,10 +59,21 @@ let
 
         ${nixopsBin} delete -d pg_net
       '';
+  nixopsInfo =
+    writeShellScriptBin ("net-cloud-info")
+      ''
+        set -euo pipefail
+
+        cd nix
+
+        ${nixopsBin} info
+      '';
 in
 [
   nixopsDeploy
   nixopsSSH
+  nixopsSSHServer
   nixopsReproTimeouts
   nixopsDestroy
+  nixopsInfo
 ]