Openshift MySQL环境vars在PHP中不起作用

Question

I cant seem to get the MySQL Vars for Openshift to work in my PHP application. I created a test.php file to try to get to the bottom of it.

test.php

<?php
define( "DB_SERVER", getenv('OPENSHIFT_MYSQL_DB_HOST'));
echo "Host1 define: ".DB_SERVER;
echo "<br>Host2 getenv: ". getenv('OPENSHIFT_MYSQL_DB_HOST');
echo "<br>Host3 _env: ". $_ENV['OPENSHIFT_MYSQL_DB_HOST'];
echo "<br>Host4 _server: ". $_SERVER['OPENSHIFT_MYSQL_DB_HOST'];
echo "<br>Openshift App Name: ". $_ENV['OPENSHIFT_APP_NAME'];
?>

Output in browser:

Host1 define:
Host2 getenv:
Host3 _env:
Host4 _server:
Openshift App Name: web

I added in the Openshift App Name Var to show that some Openshift Vars are indeed working, but the MySQL ones are not for some reason.

PHP Cartridge version: 5.4 MySQL version: 5.5

Any ideas on how to further debug? I have started from a clean install, so this is very strange.

Note:

Running echo $OPENSHIFT_MYSQL_DB_HOST in the Openshift SSH console DOES give me an IP address for the host. I have also tried restarting the cartridge from the Openshift admin page, no luck.

More than happy to give more info, I'm very keen on writing clear SO questions.

Answer 1

Finally found it! Do a git push to trigger the mysql vars to work.

Create a dummy file in your git directory (example below for linux), commit, then push:

touch test
git add test
git commit -m "Test file for triggering git push deploy process"
git push

Remember to delete the test file in your next commit.

Even though I had tried to restart the cartridge from the Openshift web control panel, the thing that solved it was to push 'something' to git, and something in that deploy process allowed those variables for mysql to work.

I found a answer here ( https://stackoverflow.com/a/26898911/339803 ) that suggested to push to git at least once, but I didnt try that as I had already pushed to git to change the PHP DB config file from static values to $_ENV values. So I assumed that doing it again wouldnt help.

Nevertheless, as soon as I created a test file and pushed to git, the mysql variables worked.