add CentOS 7 support

[seth-shaw-unlv]

GitHub Issue: Islandora/documentation/issues/946

What does this Pull Request do?

Creates the Ubuntu Apache conf directories in CentOs so playbooks that expect them won't crash.

What's new?

A new task restricted to RedHat/CentOS hosts that creates conf-available and conf-enabled in httpd.

How should this be tested?

• export ISLANDORA_DISTRO="centos/7"
• update your playbook requirements.yml to target https://github.com/seth-shaw-unlv/ansible-role-matomo instead of https://github.com/Islandora-Devops/ansible-role-matomo and remove the version tag
• vagrant up --provision
• Check that localhost:8000/matomo works.

Matomo should install on CentOS.

Interested parties

@Natkeeran, @Islandora-CLAW/committers

[dannylamb]

vagrant up 🚀

[dannylamb]

After pointing to your fork in the requirements file and removing the version tag, I'm getting the following after running ISLANDORA_DISTRO="centos/7" vagrant up:

TASK [Islandora-Devops.matomo : Install matomo httpd config file] **************
Tuesday 23 October 2018  17:02:22 -0300 (0:00:00.058)       0:42:42.378 ******* 
fatal: [default]: FAILED! => {"changed": false, "checksum": "19ad871bc132b61eac279ab208fbf9f19cd09bc9", "msg": "Destination directory /etc/httpd/conf-available does not exist"}

[seth-shaw-unlv]

@dannylamb
Hmmm... perhaps vagrant didn't update your copy of the role in roles/external. Can you verify that config_webserver.yml has the added task ("Create httpd config directories for CentOS")?

If the change wasn't applied you can either rm -rf roles/external to force a re-download or manually patch it.

[dannylamb]

@seth-shaw-unlv I just blew up roles/external and am trying again. I searched my terminal output for "Create httpd config directories for CentOS" and got zero hits, so it probably is pulling from its cache instead of grabbing your version of the role.

[dannylamb]

Works as expected