docker: enable profiling with xdebug

docker-compose.yml

@@ -21,11 +21,12 @@ services:
   php:
       build:
         context: .
-        dockerfile: ./docker/php/Dockerfile
+        dockerfile: ./docker/php/Dockerfile.profile
       volumes:
           - ./local-www:/var/www
           - ./docker/php/www.conf:/usr/local/etc/php-fpm.d/www.conf
           - ./docker/php/jit.ini:/usr/local/etc/php/conf.d/jit.ini
+          - ./docker/php/xdebug-prof.ini:/usr/local/etc/php/conf.d/xdebug-prof.ini
       networks:
         vichan_net:
           ipv4_address: 172.20.0.4

docker/php/Dockerfile.profile

@@ -0,0 +1,16 @@
+# syntax = devthefuture/dockerfile-x
+INCLUDE ./docker/php/Dockerfile
+
+RUN apk add --no-cache \
+        linux-headers \
+        $PHPIZE_DEPS \
+    && pecl update-channels \
+    && pecl install xdebug \
+    && docker-php-ext-enable xdebug \
+    && apk del \
+        linux-headers \
+        $PHPIZE_DEPS \
+    && rm -rf /var/cache/*
+
+ENV XDEBUG_OUT_DIR=/var/www/xdebug_out
+CMD [ "bootstrap.sh" ]

docker/php/bootstrap.sh

@@ -24,6 +24,14 @@ if [ ! -w /var/www ] ; then
     exit 1
 fi
 
+if [ -z "$XDEBUG_OUT_DIR" ] ; then
+    echo "INFO: Initializing xdebug out directory at $XDEBUG_OUT_DIR"
+    mkdir -p "$XDEBUG_OUT_DIR"
+    chown www-data "$XDEBUG_OUT_DIR"
+    chgrp www-data "$XDEBUG_OUT_DIR"
+    chmod 755 "$XDEBUG_OUT_DIR"
+fi
+
 # Link the entrypoints from the exposed directory.
 ln -nfs \
     /code/tools/ \

docker/php/xdebug-prof.ini

@@ -0,0 +1,7 @@
+zend_extension=xdebug
+
+[xdebug]
+xdebug.mode = profile
+xdebug.start_with_request = start
+error_reporting = E_ALL
+xdebug.output_dir = /var/www/xdebug_out