Python error when running os.system("kinit") - sh: 1: kinit: not found

Question

I am building a python docker image and am testing out the kinit capability. When I run the following `os.system('kinit') I am receiving an error

FROM python:3.5.7-buster

ADD krb5.conf /etc/krb5.conf
ADD krb5.keytab /etc/krb5.keytab

COPY requirements.txt .

RUN apt-get update && apt-get install -y libsasl2-dev libsasl2-2 libsasl2-modules-gssapi-mit openssl libkrb5-dev krb5-config kinit kinit-dev
RUN pip install --no-cache-dir -r requirements.txt

Requirements:

impyla==0.15.0 sasl==0.2.1 thrift_sasl==0.2.1 thriftpy==0.3.9 thriftpy2==0.4.0 numpy pandas openssl-python==0.1.1 kerberos

Python code:

import ssl
from impala.dbapi import connect
import os

os.system("kinit")

I get the error sh: 1: kinit: not found

Answer 1

The kinit Debian package is not-related to Kerberos:

# apt-cache search kinit
kinit - process launcher to speed up launching KDE applications
kinit-dev - process launcher to speed up launching KDE applications

The package that contains the /usr/bin/kinit binary is the krb5-user package:

# dpkg -S /usr/bin/kinit
krb5-user: /usr/bin/kinit

# apt-cache search krb5-user
krb5-user - basic programs to authenticate using MIT Kerberos

Your Dockerfile should look like this:

FROM python:3.5.7-buster

ADD krb5.conf /etc/krb5.conf
ADD krb5.keytab /etc/krb5.keytab

COPY requirements.txt .

ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update && apt-get install -y libsasl2-dev libsasl2-2 libsasl2-modules-gssapi-mit openssl libkrb5-dev krb5-config krb5-user
RUN pip install --no-cache-dir -r requirements.txt

Note: krb5-user installation is interactive, you need to set DEBIAN_FRONTEND=noninteractive to make it unattended.