added roles/ansible-gentoo_install/

roles/ansible-gentoo_install/README.md

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+# Ansible role: Gentoo_install
+
+Performs an installation of Gentoo Linux against an InstallCD environment.
+
+This role handles all steps required to install Gentoo Linux when run against
+the InstallCD environment. It will partition, format/mount filesystems,
+download/extract the stage tarball, configure locales and timezone, build a
+kernel (using genkernel), install/configure syslog and cron daemons, install
+grub, unmount filesystems, and reboot.
+
+In order to use this role, you will need to boot the InstallCD image with
+parameters like:
+
+    gentoo dosshd passwd=some_root_pass
+
+create a playbook:
+
+    ---
+    - hosts: all
+      remote_user: root
+      vars:
+        # The 'portage' module breaks on py3, which is the default in the stage
+        # tarball
+        ansible_python_interpreter: /usr/bin/python2
+      roles:
+        - gentoo_install
+
+and then run ansible with something like:
+
+    $ ansible-playbook -i <IP address>, -e ansible_password=some_root_pass -e gentoo_install_hostname=myhostname gentoo_install.yml