How to reference env directories of openshift in a python script?

Question

OpenShift has these default dir's:

# $_ENV['OPENSHIFT_INTERNAL_IP']  - IP Address assigned to the application
# $_ENV['OPENSHIFT_GEAR_NAME']  - Application name
# $_ENV['OPENSHIFT_GEAR_DIR']   - Application dir
# $_ENV['OPENSHIFT_DATA_DIR']  - For persistent storage (between pushes)
# $_ENV['OPENSHIFT_TMP_DIR']   - Temp storage (unmodified files deleted after 10 days)

How do reference them in a python script? Example script "created a log file in log directory and log in data directory?

from time import strftime

now= strftime("%Y-%m-%d %H:%M:%S")
fn  = "${OPENSHIFT_LOG_DIR}/test.log"
fn2 = "${OPENSHIFT_DATA_DIR}/test.log"
#fn  = "test.txt"

input = "appended text " + now + " \n"

with open(fn, "ab")  as f: 
       f.write(input)
with open(fn2, "ab") as f: 
       f.write(input)

Can these script be used with cron?

EDIT the BASH File:

#! /bin/bash

#date >> ${OPENSHIFT_LOG_DIR}/new.log
source $OPENSHIFT_HOMEDIR/python-2.6/virtenv/bin/activate
python file.py
date >> ${OPENSHIFT_DATA_DIR}/new2data.log

Calvin Cheng · Accepted Answer · 2012-11-06 05:10:23Z

3

import os

os.getenv("OPENSHIFT_INTERNAL_IP")

should work.

So with your example, modify to:-

import os
OPENSHIFT_LOG_DIR = os.getenv("OPENSHIFT_LOG_DIR") 
fn  = os.path.join(OPENSHIFT_LOG_DIR, "test.log")

And, yes, you can call this python script with a cron by referencing your bash script if you want... Like this for example:-

 #!/bin/bash
 date >> ${OPENSHIFT_LOG_DIR}/status.log
 chmod +x status
 cd ${OPENSHIFT_REPO_DIR}/wsgi/crawler
 nohup python file.py 2>&1 &

edited Nov 6, 2012 at 5:10

answered Nov 5, 2012 at 1:28

Calvin Cheng

36.7k40 gold badges121 silver badges171 bronze badges

Sign up to request clarification or add additional context in comments.

8 Comments

Merlin Over a year ago

Can this file.py be in the cron directories or does this file.py have to be referenced in file.sh script?

Calvin Cheng Over a year ago

You can directly call this script in your cron by referring to it as python /path/to/your/file.py in your crontab. Cron will use the python program to execute this script as expected.

Merlin Over a year ago

OpenShift doesnt have crontab. I have file.py in cron/minutely.

Calvin Cheng Over a year ago

Executing your python script and relinquishing control after that so there's no stdout and the program runs in the background. See cyberciti.biz/tips/…

Calvin Cheng Over a year ago

Are you able to execute python file.py in your openshift server after ssh-ing in your bash environment?

|

ramr · Accepted Answer · 2012-11-06 03:29:13Z

2

Those variables OPENSHIFT_* are provided as environment variables on OpenShift -- so the $_ENV["OPENSHIFT_LOG_DIR"] is an example to get the value inside a php script.

In python, the equivalent would just be os.getenv("OPENSHIFT_LOG_DIR"). Made edits to Calvin's post above and submitted 'em.

Re: the question of where file.py exists -- use os.getenv("OPENSHIFT_REPO_DIR") as the base directory where all your code would be located on the gear where you app is running. So if your file is located in .openshift/misc/file.py -- then just use:

os.path.join(os.getenv("OPENSHIFT_REPO_DIR"), ".openshift", "misc", "file.py")

to get the full path.

Or in bash, the equivalent would be:

$OPENSHIFT_REPO_DIR/.openshift/misc/file.py

HTH

answered Nov 6, 2012 at 3:29

ramr

562 bronze badges

1 Comment

Calvin Cheng Over a year ago

Once you clarified that your env variables in your question above are php variables, the syntax changes below. Updated my answer.

Collectives™ on Stack Overflow

How to reference env directories of openshift in a python script?

2 Answers 2

8 Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

8 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related