Unable to pass IPv6 MySQL host

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Feature request from joelvardy, posted on GitHub Nov 28, 2014

I am unable to specify an IPv6 address as the database hostname with the following command line arguments:

--db_host=2a01:7e00::xxxx:xxxx:xxxx:xxxx
--db_host="2a01:7e00::xxxx:xxxx:xxxx:xxxx"

Error received is:

Zend_Db_Adapter_Exception
 SQLSTATE[HY000] [2005] Unknown MySQL server host '2a01' (2)

An IPv4 address works as expected.

This was also an issue in Magento 1.x

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Comment from verklov, posted on GitHub Dec 01, 2014

@joelvardy, thank you for reporting this issue to us! We will get back to you once we have resolution for this issue.

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Comment from vpelipenko, posted on GitHub Jan 29, 2015

Internal ticket: MAGETWO-31246

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Comment from ilol, posted on GitHub Mar 02, 2015

Comment from @buskamuza :

Here is the problem - lib/internal/Magento/Framework/DB/Adapter/Pdo/Mysql.php:314

} else if (strpos($this->_config['host'], ':') !== false) { list($this->_config['host'], $this->_config['port']) = explode(':', $this->_config['host']); }