TL;DR: composer install fails when the post-install scripts can't see a MySQL server
I'm building a docker container for a Symfony application, and during the build I do something like this
RUN export SYMFONY_ENV=prod && \
composer install --prefer-dist --optimize-autoloader
Towards the end of the install, it fails with this
Generating optimized autoload files
[Doctrine\DBAL\Exception\DriverException]
An exception occured in driver: SQLSTATE[HY000] [2003] Can't connect to MySQL server on '127.0.0.1' (111)
[Doctrine\DBAL\Driver\PDOException]
SQLSTATE[HY000] [2003] Can't connect to MySQL server on '127.0.0.1' (111)
[PDOException]
SQLSTATE[HY000] [2003] Can't connect to MySQL server on '127.0.0.1' (111)
Script Sensio\Bundle\DistributionBundle\Composer\ScriptHandler::clearCache handling the post-install-cmd event terminated with an exception
[RuntimeException]
An error occurred when executing the "'cache:clear --no-warmup'" command.
Now, I could use --no-scripts
but then presumably I'd need to run composer install
again after starting a container, and I'd like my container to be as ready as possible.
As I've not found many references to similar problems, there might be something in my application at fault, and I suspect I'll be answering my own question. My hope was that in describing it, I would figure it out. Alas, I haven't. Clues are welcome :)