[JENKINS-65545] env vars are not consistent

Type: Bug
Resolution: Unresolved
Priority: Minor
Component/s: docker-workflow-plugin
Labels:
None
Environment:
jenkins 2.287
docker-plugin: 1.2.2
docker-workflow: 1.2.6

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I'm trying to do something like this:

node {
    stage('reproduce') {
        sh """
            echo '1'
            printenv PATH
            echo "$PATH"
        """
        docker.image('python:3.6.4-slim').inside {
            sh """
                echo '2'
                printenv PATH
                echo "$PATH"
            """
            withEnv(["PATH=$PATH:/my/custom/path"]) {
                sh """
                    echo '3'
                    printenv PATH
                    echo "$PATH"
                """
            }
        }
    }
}

sh (1) gives me:

+ printenv PATH
/opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ echo /opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin 
/opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

all is good so far

sh (2) gives me:

+ printenv PATH
/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ echo /opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin 
/opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

which is already confusing

sh (3) gives:

+ printenv PATH
/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ echo /opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/my/custom/path 
/opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/my/custom/path

I have couple of questions about this:

why printenv and echo in sh(2) show different results? sounds like printenv prints original env which comes from docker image while echo prints value from host jenkins.
why withEnv which is executed inside docker container does not modify docker's PATH but modifies Jenkins's PATH.

Stanislav Pugachov created issue - 2021-05-05 09:58

Stanislav Pugachov made changes - 2021-05-05 10:20

Description

Original: I'm trying to do something like this:
{code:java}
node {
    stage('reproduce') {
        sh """
            echo '1'
            printenv PATH
            echo "$PATH"
        """
        docker.image('python:3.6.4-slim').inside {
            sh """
                echo '2'
                printenv PATH
                echo "$PATH"
            """
            withEnv(["PATH=$PATH:/my/custom/path"]) {
                sh """
                    echo '3'
                    printenv PATH
                    echo "$PATH"
                """
            }
        }
    }
}
{code}
sh (1) gives me:
{noformat}
+ printenv PATH /opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ echo /opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin /opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin{noformat}
all is good so far

sh (2) gives me:
{noformat}
+ printenv PATH /usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ echo /opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin /opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin{noformat}
which is already confusing

sh (3) gives:
{noformat}
+ printenv PATH /usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ echo /opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/my/custom/path /opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/my/custom/path{noformat}

I have couple of questions about this:
* why printenv and echo in sh(2) show different results? sounds like printenv prints original env which comes from docker image while echo prints value from host jenkins.
* why withEnv which is executed inside docker container does not modify docker's PATH but modifies Jenkins's PATH.

New: I'm trying to do something like this:
{code:java}
node {
    stage('reproduce') {
        sh """
            echo '1'
            printenv PATH
            echo "$PATH"
        """
        docker.image('python:3.6.4-slim').inside {
            sh """
                echo '2'
                printenv PATH
                echo "$PATH"
            """
            withEnv(["PATH=$PATH:/my/custom/path"]) {
                sh """
                    echo '3'
                    printenv PATH
                    echo "$PATH"
                """
            }
        }
    }
}
{code}
sh (1) gives me:
{noformat}
+ printenv PATH
/opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ echo /opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
/opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin{noformat}
all is good so far

sh (2) gives me:
{noformat}
+ printenv PATH
/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ echo /opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
/opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin{noformat}
which is already confusing

sh (3) gives:
{noformat}
+ printenv PATH
/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ echo /opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/my/custom/path
/opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/my/custom/path{noformat}

I have couple of questions about this:
* why printenv and echo in sh(2) show different results? sounds like printenv prints original env which comes from docker image while echo prints value from host jenkins.
* why withEnv which is executed inside docker container does not modify docker's PATH but modifies Jenkins's PATH.

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