refactor firewall management into new role

- Add os_firewall role
- Remove firewall settings from base_os, add wait task to os_firewall
- Added a iptables firewall module for maintaining the following (in a mostly
  naive manner):
  - ensure the OPENSHIFT_ALLOW chain is defined
  - ensure that there is a jump rule in the INPUT chain for OPENSHIFT_ALLOW
  - adds or removes entries from the OPENSHIFT_ALLOW chain
  - issues '/usr/libexec/iptables/iptables.init save' when rules are changed
- Limitations of iptables firewall module
  - only allows setting of ports/protocols to open
  - no testing on ipv6 support
- made os_firewall a dependency of openshift_common
- Hardcoded openshift_common to use iptables (through the vars directory)
  until upstream support is in place for firewalld

1 files changed, 53 insertions, 0 deletions

diff --git a/roles/os_firewall/tasks/firewall/iptables.yml b/roles/os_firewall/tasks/firewall/iptables.yml
new file mode 100644
index 000000000..4f051c2bd
--- /dev/null
+++ b/roles/os_firewall/tasks/firewall/iptables.yml
@@ -0,0 +1,53 @@
+---
+- name: Install iptables packages
+  yum:
+    name: "{{ item }}"
+    state: present
+  with_items:
+  - iptables
+  - iptables-services
+
+- name: Start and enable iptables services
+  service:
+    name: "{{ os_firewall_svc }}"
+    state: started
+    enabled: yes
+  with_items:
+  - iptables
+  - ip6tables
+  register: result
+
+- name: need to pause here, otherwise the iptables service starting can sometimes cause ssh to fail
+  pause: seconds=10
+  when: result | changed
+
+- name: Ensure firewalld service is not enabled
+  service:
+    name: firewalld
+    state: stopped
+    enabled: no
+
+- name: Mask firewalld service
+  command: systemctl mask firewalld
+  register: result
+  failed_when: result.rc != 0
+  changed_when: False
+  ignore_errors: yes
+
+- name: Add iptables allow rules
+  os_firewall_manage_iptables:
+    name: "{{ item.service }}"
+    action: add
+    protocol: "{{ item.port.split('/')[1] }}"
+    port: "{{ item.port.split('/')[0] }}"
+  with_items: allow
+  when: allow is defined
+
+- name: Remove iptables rules
+  os_firewall_manage_iptables:
+    name: "{{ item.service }}"
+    action: remove
+    protocol: "{{ item.port.split('/')[1] }}"
+    port: "{{ item.port.split('/')[0] }}"
+  with_items: deny
+  when: deny is defined