update

kafka/ADD/ccmd

@@ -0,0 +1,76 @@
+#!/bin/bash
+
+##################################################
+# Mount dir                                      #
+# - /opt/kafka/data                              #
+# - /opt/kafka/logs                              #
+# ENV                                            #
+# - KAFKA_OPTS                                   #
+# - _CONF_*                                      #
+##################################################
+
+set -euo pipefail
+export LANG=en_US.UTF-8
+trap Quit EXIT
+
+PIDS=
+GOT_SIGTERM=
+
+function Print {
+    local file=/dev/null
+    [ '-f' = "$1" ] && file=$2 && shift && shift
+    date +"[%F %T] $*" | tee -a $file
+}
+
+function Quit {
+    while :; do
+        pkill -f java && Print killing java ... || break
+        sleep 1
+    done
+    Print Container stopped.
+    test -n "$GOT_SIGTERM"
+}
+
+function Usage {
+    Print 'This container should run with
+    **root user**
+    **/opt/kafka/{data,logs} mounted from host**
+    '
+}
+
+function ModifyConf {
+    Print Modify server.properties ...
+    local kv=
+    local conf='config/server.properties'
+    while read kv; do
+        [ -z "$kv" ] && break
+        Print Modify property: ${kv%%=*} ...
+        sed -i "/^${kv%%=*} *=/d" $conf
+        echo "$kv" >> $conf
+    done <<< "$(env | grep '^_CONF_' | sed 's/_CONF_//')"
+}
+
+function StartProc {
+    Print Start kafka ...
+    ./bin/kafka-server-start.sh ./config/server.properties --override log.dirs=./data \
+        &>> logs/kafka.out &
+    PIDS="$PIDS $!"
+}
+
+function Main {
+    local pid=
+    cd /opt/kafka
+    Usage
+    ModifyConf
+    StartProc
+    trap "GOT_SIGTERM=1; Print Got SIGTERM ..." SIGTERM
+    while [ -z "$GOT_SIGTERM" ] && sleep 1; do
+        for pid in $PIDS; do
+            [ ! -e /proc/$pid ] && Print Unexpected error! && exit
+        done
+    done
+}
+
+# Start here
+Main
+