I have set up a local dev docker environment with the Drupal social distribution. My issue is that Drush commands do not work and whenever I run a Drush command, it takes approximately 45 seconds to get a response. Generally, the output is always the same or similar to the following.
[warning] proc_open(): unable to dup File-Handle for descriptor 2 - Too many open files exec.inc:243
[warning] proc_get_status() expects parameter 1 to be resource, boolean given exec.inc:244
[warning] proc_close() expects parameter 1 to be resource, boolean given exec.inc:245
I am unsure what the reason for this response is or what I may have done wrong to get to this point. I tried googling the warning errors but without getting a usable answer. If someone has had similar problems and managed to solve it, some directions on what to do would be appreciated.
I also want to state that outside the docker environment I have setup multiple Drush setups; Drush commands work normally without any delay outside of it.
My environment is Ubuntu 16.04 with 15.5 GB RAM, i7-6500U CPU 2.5 GHz x4 Processor, 200GB DDR disk.
I googled some more and found out that for running Drush inside a docker environment you need
docker-compose run drush "drush command here" since Drush container gets run only for one specific command and then shuts back down, but now I am getting different errors.
docker-compose run drush cache-rebuild --verbose --debug gives this as output.
Phar detected. Proceeding to drush_main().Drush preflight prepare loaded autoloader at [0 sec, 2.92 MB] [preflight]
Starting Drush preflight. [0 sec, 2.92 MB] [preflight]
Cache HIT cid: 8.1.2-commandfiles-0-9c75c37463d39480ab97163ab2be3712 [0.01 sec, 2.96 MB] [debug]
Scanning into /etc/drush for /.*aliases.drush(8|)rc.php$/ [0.02 sec, 5.02 MB] [debug]
Scanning into /etc/drush for /self.alias.drush(8|)rc.php$/ [0.02 sec, 5.02 MB] [debug]
Scanning into phar:///usr/local/bin/drush/includes/.. for /.*aliases.drush(8|)rc.php$/ [debug] [0.02 sec, 5.02 MB]
Scanning into phar:///usr/local/bin/drush/includes/.. for /self.alias.drush(8|)rc.php$/ [debug] [0.03 sec, 5.03 MB]
Scanning into /root/.drush for /.*aliases.drush(8|)rc.php$/ [0.04 sec, 5.03 MB] [debug]
Scanning into /root/.drush for /self.alias.drush(8|)rc.php$/ [0.04 sec, 5.03 MB] [debug]
Bootstrap to phase 0. [0.05 sec, 6.01 MB] [bootstrap]
Bootstrap to phase 2. [0.05 sec, 6.01 MB] [bootstrap]
Command cache-rebuild needs a higher bootstrap level to run - you will need to invoke drush from a more functional Drupal environment to run this command. [error] [0.05 sec, 6.01 MB]
Command cache-rebuild requires Drupal core version 8+ to run. [0.05 sec, 6.01 MB] [error]
The drush command 'cache-rebuild' could not be executed. [0.05 sec, 6.01 MB]
Hope that gives you a clue of what is the matter here.