error while loading shared libraries when running prehook pod - openshift

Question

I am new to OpenShift, I am deploying my flask app onto it, but encountered some problem. My app/container name is flog.
I set up a lifecycle prehook to ensure the database is created correctly for the app deployment. Here is my config(critical part):
spec:
replicas: 1
selector:
deploymentconfig: flog
strategy:
activeDeadlineSeconds: 21600
resources: {}
rollingParams:
intervalSeconds: 1
maxSurge: 25%
maxUnavailable: 25%
pre:
execNewPod:
command:
- flask
- init
containerName: flog
env:
- name: FLASK_APP
value: wsgi.py
failurePolicy: Abort
timeoutSeconds: 600
updatePeriodSeconds: 1
type: Rolling
It works correctly in building but breaks in prehook
--> pre: Running hook pod ...
/opt/app-root/bin/python3: error while loading shared libraries: libpython3.5m.so.rh-python35-1.0: cannot open shared object file: No such file or directory
However, when I debug in terminal and type python3 command, it works well.
Thanks in advance for any help.

Answer 1

You will need to add a shell script into your image which in turns then runs your command. The shell script wrapper is needed as initialisation of the shell environment has the side effect of enabling the Python environment, including setting environment variables so it can find the Python shared library.
So change:
command:
- flask
- init
to:
command:
- somescript
And in somescript have:
#!/bin/bash
flask init