use docker layer to cache build process

images/nginx/Dockerfile

@@ -17,10 +17,40 @@ FROM BASEIMAGE
 
 CROSS_BUILD_COPY qemu-ARCH-static /usr/bin/
 
-COPY build.sh /
-
 RUN clean-install bash
 
+RUN mkdir -p /etc/nginx
+
+# install required packages to build
+RUN apt-get update && apt-get dist-upgrade -y && \
+  clean-install \
+  bash \
+  build-essential \
+  curl ca-certificates \
+  libgeoip1 \
+  libgeoip-dev \
+  patch \
+  libpcre3 \
+  libpcre3-dev \
+  libssl-dev \
+  zlib1g \
+  zlib1g-dev \
+  libaio1 \
+  libaio-dev \
+  openssl \
+  libperl-dev \
+  cmake \
+  util-linux \
+  lmdb-utils \
+  libjemalloc1 libjemalloc-dev \
+  wget \
+  libcurl4-openssl-dev \
+  procps \
+  git g++ pkgconf flex bison doxygen libyajl-dev liblmdb-dev libtool dh-autoreconf libxml2 libpcre++-dev libxml2-dev \
+  lua-cjson \
+  || exit 1
+
+COPY build.sh /
 RUN /build.sh
 
 # Create symlinks to redirect nginx logs to stdout and stderr docker log collector

images/nginx/build.sh

@@ -56,41 +56,6 @@ if [[ ${ARCH} == "ppc64le" ]]; then
   clean-install software-properties-common
 fi
 
-apt-get update && apt-get dist-upgrade -y
-
-# install required packages to build
-clean-install \
-  bash \
-  build-essential \
-  curl ca-certificates \
-  libgeoip1 \
-  libgeoip-dev \
-  patch \
-  libpcre3 \
-  libpcre3-dev \
-  libssl-dev \
-  zlib1g \
-  zlib1g-dev \
-  libaio1 \
-  libaio-dev \
-  openssl \
-  libperl-dev \
-  cmake \
-  util-linux \
-  lua5.1 liblua5.1-0 liblua5.1-dev \
-  lmdb-utils \
-  libjemalloc1 libjemalloc-dev \
-  wget \
-  libcurl4-openssl-dev \
-  procps \
-  git g++ pkgconf flex bison doxygen libyajl-dev liblmdb-dev libtool dh-autoreconf libxml2 libpcre++-dev libxml2-dev \
-  lua-cjson \
-  || exit 1
-
-ln -s /usr/lib/x86_64-linux-gnu/liblua5.1.so /usr/lib/liblua.so
-
-mkdir -p /etc/nginx
-
 if [[ ${ARCH} == "s390x" ]]; then
   # avoid error:
   # git: ../nptl/pthread_mutex_lock.c:81: __pthread_mutex_lock: Assertion `mutex->__data.__owner == 0' failed.