I'm attempting to create a job for running selenium tests. I have three services: * Web server service * MYSQL service * Selenium service In this use case all the services need to be able to talk to each other. But I couldn't get it working, so I wrote a web script to `cat /etc/hosts` in the web container, then curled it from the job script and saw this: ``` $ curl -s https://local.company.com/dummydebug.php 2>&1 string(174) "127.0.0.1 localhost ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters 172.17.0.8 e76cd5e56588 " ``` Here's an excerpt of my job: ``` end_to_end: stage: 'test' image: 'copmany/ci:production' script: - 'php artisan --env=local migrate --seed' - 'curl -s https://local.company.com/user/login 2>&1' - './vendor/bin/phpunit --group=BrowserTests' services: - 'mysql:5.7' - name: 'company/testdummy:staging' alias: 'local.company.com' - name: 'selenium/standalone-chrome' alias: 'selenium' ``` As you can see the web container doesn't have host entries for any of the services! However if I do a `cat /etc/hosts` in the job script I see: ``` 127.0.0.1 localhost ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters 172.17.0.7 local.company.com 9748c399f5f6 runner-UCu_5zqb-project-6070333-concurrent-0-company__testdummy-2 172.17.0.8 selenium__standalone-chrome 7122907a8059 runner-UCu_5zqb-project-6070333-concurrent-0-selenium__standalone-chrome-3 172.17.0.8 selenium-standalone-chrome 7122907a8059 runner-UCu_5zqb-project-6070333-concurrent-0-selenium__standalone-chrome-3 172.17.0.8 selenium 7122907a8059 runner-UCu_5zqb-project-6070333-concurrent-0-selenium__standalone-chrome-3 172.17.0.2 mysql 0ce6ef257424 runner-UCu_5zqb-project-6070333-concurrent-0-mysql-0 172.17.0.7 company__testdummy 9748c399f5f6 runner-UCu_5zqb-project-6070333-concurrent-0-company__testdummy-2 172.17.0.7 company-testdummy 9748c399f5f6 runner-UCu_5zqb-project-6070333-concurrent-0-company__testdummy-2 172.17.0.9 runner-UCu_5zqb-project-6070333-concurrent-0 ``` Giving services a way to communicate between each other would open up a lot of possibilities in this use case.