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dockerdockerfileenvironment-variablesdocker-entrypoint

Date is not being read in Dockerfile ENTRYPOINT

The problem for first time is works fine but, for next it fails to write the file with same name, So I tried adding pod_id to make it unique but seems pod id to remains same when it restarts after failing, so tried adding timestamp to the filename, but date function is being treated as string, so again the file name remains same for every restarts and heap dump file doesn't get generated next time.

ENTRYPOINT ["java","-XX:+HeapDumpOnOutOfMemoryError","-XX:HeapDumpPath=mountpath-heapdump/$MY_POD_ID$(date +'%Y-%m-%d_%H-%M-%S')_heapdump.bin","-jar", "/app.jar"])

I also without double quotes:

ENTRYPOINT java -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=mountpath-heapdump/$MY_POD_ID$(date +'%Y-%m-%d_%H-%M-%S')_heapdump.bin -jar app.jar

working fine in POC but for my project application, environment variables are not reflecting, spring-profile was not picked. Even other environments variable too was not picked. So I am trying the first approach only I need help to append timestamp in the filename.

Solution

  • Answer provided by @rzlvmp worked for me.

    You may try to run java inside shell ENTRYPOINT ["bash", "-c", "java -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=mountpath-heapdump/$MY_POD_ID$(date +'%Y-%m-%d_%H-%M-%S')_heapdump.bin -jar /app.jar"]