nginx: Add test for canary deployment

Two different backend services are placed in the same upstream, which
load balances between them.   Only one virtual host is defined.

See docs/usage/canary.md

Signed-off-by: Euan Harris <[email protected]>

extensions/nginx/testdata/canary_1.in

@@ -0,0 +1,22 @@
+[
+  {
+    "name": "blue",
+    "hosts": [
+      "demo.example.com"
+    ],
+    "targets": [
+      "10.0.0.1:80"
+    ],
+    "port": 80
+  },
+  {
+    "name": "green",
+    "hosts": [
+      "demo.example.com"
+    ],
+    "targets": [
+      "192.168.0.1:80"
+    ],
+    "port": 80
+  }
+]

extensions/nginx/testdata/canary_1.out

@@ -0,0 +1,165 @@
+# interlock config version 
+user nginx;
+worker_processes 1;
+
+
+
+error_log  /dev/stdout warn;
+pid        /var/run/proxy.pid;
+
+
+events {
+    worker_connections 1024;
+}
+
+http {
+    include       /etc/nginx/mime.types;
+    default_type  application/octet-stream;
+    server_names_hash_bucket_size 128;
+
+
+
+    log_format  main '$remote_addr - $remote_user [$time_local] "$request" '
+		    '$status $body_bytes_sent "$http_referer" '
+		    '"$http_user_agent" "$http_x_forwarded_for"';
+
+    log_format trace '$remote_addr - $remote_user [$time_local] "$request" $status '
+		    '$body_bytes_sent "$http_referer" "$http_user_agent" '
+		    '"$http_x_forwarded_for" $request_id $msec $request_time '
+		    '$upstream_connect_time $upstream_header_time $upstream_response_time';
+
+    access_log  /dev/stdout main;
+
+    sendfile        on;
+    #tcp_nopush     on;
+
+    keepalive_timeout  75s;
+    client_max_body_size 1m;
+    client_body_buffer_size 8k;
+    client_header_buffer_size 1k;
+    large_client_header_buffers 4 8k;
+    client_body_timeout 60s;
+    underscores_in_headers off;
+
+    add_header x-request-id $request_id;
+    add_header x-proxy-id $hostname;
+    add_header x-server-info "interlock/2.0.0-dev (HEAD) linux/amd64";
+    add_header x-upstream-addr $upstream_addr;
+    add_header x-upstream-response-time $upstream_response_time;
+
+    proxy_connect_timeout 600;
+    proxy_send_timeout 600;
+    proxy_read_timeout 600;
+    proxy_set_header        X-Real-IP         $remote_addr;
+    proxy_set_header        X-Forwarded-For   $proxy_add_x_forwarded_for;
+    proxy_set_header        Host              $http_host;
+    proxy_set_header x-request-id $request_id;
+    send_timeout 600;
+    proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
+
+    ssl_prefer_server_ciphers on;
+    ssl_ciphers HIGH:!aNULL:!MD5;
+    ssl_protocols TLSv1.2;
+
+
+    map $http_upgrade $connection_upgrade {
+        default upgrade;
+        ''      close;
+    }
+
+
+    # default host return 503
+    server {
+	listen 80 default_server;
+	server_name _;
+
+	root /usr/share/nginx/html;
+
+	error_page   503 /50x.html;
+	location = /50x.html {
+	    try_files /50x.html @error;
+	    internal;
+	}
+
+	location @error {
+	    root /usr/share/nginx/html;
+	}
+
+	location / {
+	    return 503;
+	}
+
+	location /nginx_status {
+	    stub_status on;
+	    access_log off;
+	}
+    }
+
+
+
+
+
+    upstream up-demo.example.com {
+        zone up-demo.example.com_backend 64k;
+
+
+        server 10.0.0.1:80;
+
+
+        server 192.168.0.1:80;
+
+
+    }
+
+    server {
+        listen 80;
+	server_name demo.example.com;
+
+
+
+
+
+        location / {
+            proxy_pass http://up-demo.example.com;
+        }
+
+
+
+
+        location /nginx_status {
+            stub_status on;
+            access_log off;
+        }
+
+    }
+
+
+
+
+
+
+
+
+    include       /etc/nginx/conf.d/*.conf;
+}
+
+stream {
+    # main log compatible format
+    log_format stream '$remote_addr - - [$time_local] "$ssl_preread_server_name -> $name ($protocol)" '
+                          '$status $bytes_sent "" "" "" ';
+
+    map $ssl_preread_server_name $name {
+
+    }
+
+
+
+
+    server {
+	listen 443;
+	proxy_pass $name;
+	proxy_protocol on;
+	ssl_preread on;
+	access_log /dev/stdout stream;
+    }
+}