Solution to the error when docker executes exec: 1. Replace the first line in the script with "/bin/bash"; 2. Execute "docker exec -d service_name /bin/bash -c '/opt /start.sh'".

The operating environment of this article: centos7 system, Docker version 20.10.11, Dell G3 computer.

Docker exec failed to execute script solution

##Background introduction

Original script

docker exec -it service_name /bin/bash -c '/opt/start.sh'

#!/bash
nohup start1.sh > start1.log 2>&1 &
sleep 5
nohup start2.sh 2>&1 &
echo 'server started'

Problem location

1. Irregular script writing

/bin/bash And the script What is specified in is indeed /bash. We all know that the content of the first line of the script specifies the path of the shell script interpreter, and this specified path can only be placed on the first line of the file. Therefore, you need to replace the first line in the script with /bin/bash so that they use the same interpreter

2. There is a problem with the startup parameters

-it parameter is used during the execution of docker exec.

-t allows docker to allocate a pseudo terminal and bind it to the container's standard Enter
-i to keep the standard input of the container open.

docker exec -d service_name /bin/bash -c '/opt/start.sh'

Copy after login

#!/bin/bash
nohup start1.sh > start1.log 2>&1 &
sleep 5
nohup start2.sh 2>&1 &
echo 'server started'

Copy after login

Recommended learning: "

docker tutorial"

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