feature: (OpenAtomFoundation#879)

update config file using environment variable while docker create

Dockerfile

@@ -1,7 +1,16 @@
-FROM centos:centos7
-MAINTAINER left2right <[email protected]>
+ FROM centos:7
 
-RUN rpm -ivh https://mirrors.ustc.edu.cn/epel/epel-release-latest-7.noarch.rpm && \
+LABEL maintainer="[email protected], [email protected]"
+
+ENV PIKA  /pika
+ENV PIKA_BUILD_DIR /tmp/pika
+ENV PATH ${PIKA}:${PIKA}/bin:${PATH}
+
+COPY . ${PIKA_BUILD_DIR}
+
+WORKDIR ${PIKA_BUILD_DIR}
+
+RUN rpm -ivh https://mirrors.aliyun.com/epel/epel-release-latest-7.noarch.rpm && \
     yum -y makecache && \
     yum -y install snappy-devel && \
     yum -y install protobuf-devel && \
@@ -15,17 +24,16 @@ RUN rpm -ivh https://mirrors.ustc.edu.cn/epel/epel-release-latest-7.noarch.rpm &
     yum -y install make && \
     yum -y install which && \
     yum -y install git && \
-    make && \
+    make -j24 && \
     cp -r ${PIKA_BUILD_DIR}/output ${PIKA} && \
+    cp -r ${PIKA_BUILD_DIR}/entrypoint.sh ${PIKA} && \
     yum -y remove gcc-c++ && \
     yum -y remove make && \
     yum -y remove which && \
     yum -y remove git && \
-    yum -y clean all && \
-    rm -rf /var/cache/yum && \
-    rm -rf .git && \
-    rm -rf ${PIKA_BUILD_DIR}
+    yum -y clean all 
 
 WORKDIR ${PIKA}
 
-CMD ["sh", "-c", "${PIKA}/bin/pika -c ${PIKA}/conf/pika.conf"]
+ENTRYPOINT ["/pika/entrypoint.sh"]
+CMD ["/pika/bin/pika", "-c", "/pika/conf/pika.conf"]

entrypoint.sh

@@ -0,0 +1,126 @@
+#!/bin/sh
+#
+# CONFIG(path1;path2)
+# You can add the path of configuration file or folder to the CONFIG
+# environment variable, and use semicolon to separate them. This script
+# will catch all SUNKAISENS_ prefix environment variable and match it
+# in configuration files. e.g. 'SUNKAISENS_HELLO__ZHANG_XIANG_LONG' may
+# be converted to 'hello.zhang_xiang_long'. This is borrowed from the
+# emqx's docker-entrypoint.sh.
+#
+# VAR_CASE(CamelCase,snake_case,spinal-case,ignore-case,raw-case)
+# We use 'raw-case' by default, if you set the VAR_CASE environment
+# variable to 'CamelCase', that will be converted to 'hello.zhangXiangLong'.
+# Of course, we also support case-insensitive variable name matching by
+# setting VAR_CASE to 'ignore-case', but it is not recommended because you
+# need to ensure that the variable name is unique when the case is ignored.
+#
+# VAR_SEPARATOR('=' or ':')
+# VAR_SEPARATOR environment variable is used to separate the name and
+# value of variables, we use '=' by default, you can also use ':'.
+#
+# WAIT_FOR_SERVICE(IP1[:Port1];IP2[:Port2])
+# In addition, you can add services that you want wait for to the WAIT_FOR_SERVICE
+# environment variable, such as database service. This script will wait
+# for these services until they are available.
+#
+# ZhangXiangLong <[email protected]>
+
+set -eo pipefail
+
+CONFIG=/pika/conf/pika.conf
+VAR_CASE=spinal-case
+VAR_SEPARATOR=":"
+
+case $VAR_SEPARATOR in
+:)
+    ;;
+=)
+    ;;
+*)
+    VAR_SEPARATOR="=";;
+esac
+
+array=(${CONFIG//;/ })
+for path in ${array[@]}; do
+    if [[ -f $path ]]; then
+        file_list=$file_list";"$path
+    elif [[ -d $path ]]; then
+        for var in $(ls $path); do
+            if [[ -f $path/$var ]]; then
+                file_list=$file_list";"$path/$var
+            fi
+        done
+    fi
+done
+file_array=(${file_list//;/ })
+
+var_replace() {
+    for file in ${file_array[@]}; do
+        if [[ -n "$(cat $file | grep -E "^(^|^#*|^#*\s*)$var_name")" ]]; then
+            echo "$var_name${VAR_SEPARATOR}$(eval echo \$$var_full_name)"
+            echo "$(sed -r "s/(^#*\s*)($var_name)\s*${VAR_SEPARATOR}\s*(.*)/\2${VAR_SEPARATOR}$(eval echo \$$var_full_name | sed 's/[[:punct:]]/\\&/g')/g" $file)" > $file
+        fi
+    done
+}
+
+var_replace_i() {
+    for file in ${file_array[@]}; do
+        if [[ -n "$(cat $file | grep -i -E "^(^|^#*|^#*\s*)$var_name")" ]]; then
+            echo "$var_name${VAR_SEPARATOR}$(eval echo \$$var_full_name)"
+            echo "$(sed -r "s/(^#*\s*)($var_name)\s*${VAR_SEPARATOR}\s*(.*)/\2${VAR_SEPARATOR}$(eval echo \$$var_full_name | sed 's/[[:punct:]]/\\&/g')/gI" $file)" > $file
+        fi
+    done
+}
+
+for var in $(env); do
+    if [[ -n "$(echo $var | grep -E "^PIKA_")" ]]; then
+        var_name=$(echo "$var" | sed -r "s/PIKA_([^=]*)=.*/\1/g" | sed -r "s/__/\./g")
+        var_full_name=$(echo "$var" | sed -r "s/([^=]*)=.*/\1/g")
+        case $VAR_CASE in
+        CamelCase)
+            var_name=$(echo "$var_name" | tr '[:upper:]' '[:lower:]' | sed -r "s/_([^_])/\u\1/g")
+            var_replace;;
+        snake_case)
+            var_name=$(echo "$var_name" | tr '[:upper:]' '[:lower:]')
+            var_replace;;
+        spinal-case)
+            var_name=$(echo "$var_name" | tr '[:upper:]' '[:lower:]' | tr '_' '-')
+            var_replace;;
+        ignore-case)
+            var_name=$(echo "$var_name" | tr '[:upper:]' '[:lower:]')
+            var_replace_i;;
+        raw-case | *)
+            var_replace;;
+        esac
+    fi
+done
+
+# https://docs.docker.com/compose/startup-order/
+# https://github.com/vishnubob/wait-for-it
+if [[ -n "$WAIT_FOR_SERVICE" ]]; then
+    serv_array=(${WAIT_FOR_SERVICE//;/ })
+    for serv in ${serv_array[@]}; do
+        serv_addr=(${serv//:/ })
+        serv_host=${serv_addr[0]}
+        serv_port=${serv_addr[1]}
+        case ${#serv_addr[*]} in
+        1)
+            until host $serv_host; do
+                sleep 3
+            done
+            echo "$serv_host OK.";;
+        2)
+            until host $serv_host; do
+                sleep 3
+            done
+            echo "$serv_host OK."
+
+            wait-for-it.sh -t 0 $serv;;
+        *)
+            ;;
+        esac
+    done
+fi
+
+exec "$@"