We are migrating to IBM Liberty from IBM ND, created an image based on "22.0.0.5-full-java11-openj9", unable to replace ENV variables while creating the container(docker run -e DB_HOST=xxx), any recommendation?


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ram mohan
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Hi Ram,

that is interesting, I never experienced such an issue. That said, 

• what do you mean by replace? DB_HOST should not have a pre-defined value.
• How do you access those values, and where?

Keep in mind: If you enter ${my.env.var} in the server.xml file, it looks for environment variables with the following names: You only need the ${env.} prefix for 19.0.0.3 and earlier.
HTH,
Ben

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Benjamin Marwell
System Engineer // IBM Champion // Apache Shiro PMC
Finanz Informatik
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While browsing in the issues, I found this: 
Environment variables not correctly resolved in server.xml variables · Issue #8298 · OpenLiberty/open-liberty (github.com)

After checking whether the docs are correct: If they are not, you might want to subscribe to that issue on GitHub.

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Benjamin Marwell
System Engineer // IBM Champion // Apache Shiro PMC
Finanz Informatik
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Original Message:
Sent: Wed June 15, 2022 01:57 AM
From: Benjamin Marwell
Subject: Datasource credentials in IBM Liberty Docker container

Hi Ram,

that is interesting, I never experienced such an issue. That said, 

• what do you mean by replace? DB_HOST should not have a pre-defined value.
• How do you access those values, and where?

Keep in mind: If you enter ${my.env.var} in the server.xml file, it looks for environment variables with the following names:

1. my.env.var

2. my_env_var

3. MY_ENV_VAR

You only need the ${env.} prefix for 19.0.0.3 and earlier.
HTH,
Ben

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Benjamin Marwell
System Engineer // IBM Champion // Apache Shiro PMC
Finanz Informatik
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