Slim version of Docker using Firefox. (#2914)

* Slim version of Docker using Firefox.

At the moment this is not using xvfb, ffmpeg, imagemagick, python,
visual metrics etc. #2913

.travis.yml

@@ -18,9 +18,11 @@ matrix:
       addons:
       install:
         - docker build -t sitespeedio/sitespeed.io .
+        - docker build -t sitespeedio/sitespeed.io:slim --file Dockerfile-slim .
       script: 
         - docker run --rm sitespeedio/sitespeed.io https://www.sitespeed.io -n 1 -b chrome
         - docker run --rm sitespeedio/sitespeed.io https://www.sitespeed.io -n 1 -b firefox
+        - docker run --rm sitespeedio/sitespeed.io:slim https://www.sitespeed.io -n 1
     - name: "Browser tests on Linux"
       sudo: required
       dist: bionic

Dockerfile-slim

@@ -0,0 +1,43 @@
+FROM node:12.16.1-buster-slim
+
+ENV SITESPEED_IO_BROWSERTIME__DOCKER true
+ENV SITESPEED_IO_BROWSERTIME__VIDEO false
+ENV SITESPEED_IO_BROWSERTIME__BROWSER firefox
+ENV SITESPEED_IO_BROWSERTIME__VISUAL_METRICS false
+ENV SITESPEED_IO_BROWSERTIME__HEADLESS true
+
+ENV FIREFOX_VERSION 74.0
+
+ENV PATH="/usr/local/bin:${PATH}"
+
+RUN buildDeps='wget bzip2' && apt-get update && apt -y install $buildDeps && \
+    # Download and unpack the correct Firefox version
+    wget https://ftp.mozilla.org/pub/firefox/releases/${FIREFOX_VERSION}/linux-x86_64/en-US/firefox-${FIREFOX_VERSION}.tar.bz2 && \
+    tar -xjf firefox-${FIREFOX_VERSION}.tar.bz2 && \
+    rm firefox-${FIREFOX_VERSION}.tar.bz2 && \
+    mv firefox /opt/ && \
+    ln -s /opt/firefox/firefox /usr/local/bin/firefox && \
+    # Install dependencies for Firefox
+    apt-get install -y --no-install-recommends --no-install-suggests \
+        `apt-cache depends firefox-esr | awk '/Depends:/{print$2}'` && \
+    # iproute2 = tc
+    apt -y install tcpdump iproute2 ca-certificates sudo --no-install-recommends --no-install-suggests && \
+    # Cleanup
+    apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false $toolDeps \
+    && rm -rf /var/lib/apt/lists/* /tmp/* 
+
+# Install sitespeed.io
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+COPY . /usr/src/app
+RUN CHROMEDRIVER_SKIP_DOWNLOAD=true EGDEDRIVER_SKIP_DOWNLOAD=true npm install --production
+WORKDIR /usr/src/app
+COPY docker/scripts/start-slim.sh /start.sh
+
+# Allow all users to run commands needed by sitespeedio/throttle via sudo
+# See https://github.com/sitespeedio/throttle/blob/master/lib/tc.js
+RUN echo 'ALL ALL=NOPASSWD: /usr/sbin/tc, /usr/sbin/route, /usr/sbin/ip' > /etc/sudoers.d/tc
+
+ENTRYPOINT ["bash","/start.sh"]
+VOLUME /sitespeed.io
+WORKDIR /sitespeed.io

docker/scripts/start-slim.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+firefox --version
+
+SITESPEEDIO=/usr/src/app/bin/sitespeed.js
+
+MAX_OLD_SPACE_SIZE="${MAX_OLD_SPACE_SIZE:-2048}"
+
+WORKDIR_UID=$(stat -c "%u" .)
+WORKDIR_GID=$(stat -c "%g" .)
+
+# Create user with the same UID and GID as the owner of the working directory, which will be used
+# to execute node. This is partly for security and partly so output files won't be owned by root.
+groupadd --non-unique --gid $WORKDIR_GID sitespeedio
+useradd --non-unique --uid $WORKDIR_UID --gid $WORKDIR_GID --home-dir /tmp sitespeedio
+
+# Need to explictly override the HOME directory to prevent dconf errors like:
+# (firefox:2003): dconf-CRITICAL **: 00:31:23.379: unable to create directory '/root/.cache/dconf': Permission denied.  dconf will not work properly.
+export HOME=/tmp
+
+
+# Inspired by docker-selenium way of shutting down
+function shutdown {
+  kill -s SIGTERM ${PID}
+  wait $PID
+}
+
+chroot --skip-chdir --userspec='sitespeedio:sitespeedio' / node --max-old-space-size=$MAX_OLD_SPACE_SIZE $SITESPEEDIO "$@" &
+
+PID=$!
+
+trap shutdown SIGTERM SIGINT
+wait $PID
+
+

release.sh

@@ -17,7 +17,10 @@ PACKAGE_VERSION=$(node -e 'console.log(require("./package").version)')
 
 docker build --no-cache -t sitespeedio/sitespeed.io:$PACKAGE_VERSION -t sitespeedio/sitespeed.io:latest .
 docker push sitespeedio/sitespeed.io:$PACKAGE_VERSION
-# docker push sitespeedio/sitespeed.io:latest
+docker push sitespeedio/sitespeed.io:latest
+
+docker build --no-cache -t sitespeedio/sitespeed.io:$PACKAGE_VERSION-slim --file Dockerfile-slim .
+docker push sitespeedio/sitespeed.io:$PACKAGE_VERSION-slim
 
 docker build -t sitespeedio/sitespeed.io:$PACKAGE_VERSION-action --build-arg version=$PACKAGE_VERSION --file docker/github-action/Dockerfile .
 docker push sitespeedio/sitespeed.io:$PACKAGE_VERSION-action