Expose healthcheck endpoint (#269)

* Expose healthcheck endpoint

* Wait for service to be live before running tests

docker/integtest/0-wait-for-services.sh

@@ -41,6 +41,16 @@ wait_for_appinsights() {
   log "Appinsights is running"
 }
 
+wait_for_api() {
+  while ! curl -fs "http://nginx:8888/healthcheck/ping" >/dev/null; do
+    log "Waiting for api"
+    sleep "${polling_interval_seconds}s"
+  done
+
+  log "Api is running"
+}
+
 wait_for_rabbitmq
 wait_for_postgres
 wait_for_appinsights
+wait_for_api

docker/nginx/nginx.conf.template

@@ -22,6 +22,14 @@ http {
 
   keepalive_timeout 65;
 
+  upstream healthcheck_hosts {
+    server ${HOSTNAME_EMAIL_RECEIVE};
+    server ${HOSTNAME_CLIENT_METRICS};
+    server ${HOSTNAME_CLIENT_WRITE};
+    server ${HOSTNAME_CLIENT_READ};
+    server ${HOSTNAME_CLIENT_REGISTER};
+  }
+
   server {
     listen ${PORT};
 
@@ -37,6 +45,10 @@ http {
       root /static;
     }
 
+    location /healthcheck {
+      proxy_pass http://healthcheck_hosts;
+    }
+
     location /api/email/sendgrid {
       proxy_pass http://${HOSTNAME_EMAIL_RECEIVE};
     }