copr: auto-setup the ipv6 configuration

Turns out that, even though IPv6 is configured on the initial VM boot,
the IPv6 needs manual tweeks and reboot (or nmcli dance).  Related to:
https://pavel.raiskup.cz/blog/switch-fedora-box-to-ipv6-in-aws.html

inventory/group_vars/copr_back_dev_aws

@@ -47,3 +47,5 @@ tcp_ports: [
     9100,
 ]
 services_disabled: false
+
+aws_ipv6_addr: "2600:1f18:8ee:ae00:6c8c:e094:1c5b:c2f9/128"

inventory/group_vars/copr_dist_git_dev_aws

@@ -13,3 +13,5 @@ letsencrypt:
   predefined_deploy_script: httpd
 tcp_ports: [22, 80, 443]
 services_disabled: false
+
+aws_ipv6_addr: "2600:1f18:8ee:ae00:691b:4103:dbcd:a64a/128"

inventory/group_vars/copr_front_dev_aws

@@ -28,3 +28,5 @@ letsencrypt:
   predefined_deploy_script: httpd
 tcp_ports: [22, 80, 443]
 services_disabled: false
+
+aws_ipv6_addr: "2600:1f18:8ee:ae00:66a:fd15:3f16:4092/128"

inventory/group_vars/copr_keygen_dev_aws

@@ -6,3 +6,5 @@ datacenter: aws
 freezes: false
 tcp_ports: [22]
 services_disabled: false
+
+aws_ipv6_addr: "2600:1f18:8ee:ae00:3cbb:7920:d83:e607/128"

roles/copr/base/tasks/main.yml

@@ -86,5 +86,28 @@
   - config
   when: datacenter != "aws"
 
+- name: setup ipv6 networking general
+  lineinfile:
+    dest: /etc/sysconfig/network-scripts/ifcfg-eth0
+    backup: yes
+    state: present
+    line: "{{ item }}"
+  with_items:
+    - IPV6INIT=yes
+    - IPV6_DEFROUTE=yes
+    - IPV6_AUTOCONF=yes
+  when: aws_ipv6_addr is defined
+  tags: ipv6_config
+
+- name: setup ipv6 address
+  lineinfile:
+    dest: /etc/sysconfig/network-scripts/ifcfg-eth0
+    backup: yes
+    state: present
+    line: "{{ aws_ipv6_addr }}"
+    regex: ^IPV6ADDR=
+  when: aws_ipv6_addr is defined
+  tags: ipv6_config
+
 # - name: enable and run logrotate service
 #   service: name="logrotate" state=started