與運行Java應用程序和Web服務器不工作

Question

我是個新的碼頭工人，容器泊塢窗，我想創建一個容器中運行多個服務， 使用該文檔：Run multiple services in a container

我已經成功地得到Java和安裝在containe的NodeJS，最終導致在Dockerfile結束作爲入口點運行此腳本：

#!/bin/bash 
 
# Start the first process 
 
/tmp/cliffer/bin/startup.sh & 
 
status=$? 
 
if [ $status -ne 0 ]; then 
 
    echo "Failed to start my_first_process: $status" 
 
    exit $status 
 
fi 
 

 
# Start the second process 
 
npm start & 
 
status=$? 
 
if [ $status -ne 0 ]; then 
 
    echo "Failed to start my_second_process: $status" 
 
    exit $status 
 
fi 
 

 
# Naive check runs checks once a minute to see if either of the processes exited. 
 
# This illustrates part of the heavy lifting you need to do if you want to run 
 
# more than one service in a container. The container will exit with an error 
 
# if it detects that either of the processes has exited. 
 
# Otherwise it will loop forever, waking up every 60 seconds 
 
    
 
while /bin/true; do 
 
    PROCESS_1_STATUS=$(ps aux |grep -q my_first_process |grep -v grep) 
 
    PROCESS_2_STATUS=$(ps aux |grep -q my_second_process | grep -v grep) 
 
    # If the greps above find anything, they will exit with 0 status 
 
    # If they are not both 0, then something is wrong 
 
    if [ $PROCESS_1_STATUS -ne 0 -o $PROCESS_2_STATUS -ne 0 ]; then 
 
    echo "One of the processes has already exited." 
 
    exit -1 
 
    fi 
 
    sleep 60 
 
done

這兩個服務都在後臺運行，結果是npm start，啓動一個web服務器，但立即關閉。 這是輸出IM從npm start &

[--:--:--][CONSOLE] [09:19:11] [Start] Listening at port 3000 
[09:19:11] [Stop] Shutting down 

讓我單獨在自己的容器它的作品完美運行與每個服務的容器。

有什麼想法爲什麼？

Answer 1

Docker需要一個進程在前臺運行，否則它將退出。您的前臺程序是睡眠60秒的入口點，並檢查兩個進程是否仍在後臺。

該檢查針對進程名稱「my_first_process」。這應該是您的實例是這樣的「java」

所以不是

ps aux |grep -q my_first_process |grep -v grep 
ps aux |grep -q my_second_process |grep -v grep 

嘗試

ps aux |grep -q java |grep -v grep 
ps aux |grep -q npm |grep -v grep 

喬爾的評論仍然有效，更有意義運行兩個不同的碼頭工人集裝箱爲你的使用情況。