roles/zabbix-agent: Deploy Zabbix agent

The *zabbix-agent* role installs the Zabbix monitoring agent on the
managed node, and sets it up to communicate with the Zabbix server
specified by the `zabbix_server` variable. This role "should" be
compatible with most distributions; it has been tested with Fedora and
Gentoo.

roles/zabbix-agent/tasks/main.yml

@@ -0,0 +1,47 @@
+- name: load distribution-specifc values
+  include_vars: '{{ item }}'
+  with_first_found:
+  - '{{ ansible_distribution }}-{{ ansible_distribution_major_version }}.yml'
+  - '{{ ansible_distribution }}.yml'
+  - '{{ ansible_os_family }}.yml'
+  - defaults.yml
+
+- name: ensure zabbix agent is installed
+  package:
+    name={{ zbx_agent_required_packages|join('') }}
+    state=present
+  tags:
+  - install
+
+- name: ensure zabbix agent is configured
+  template:
+    src={{ zbx_agent_config_tmpl }}
+    dest={{ zbx_agent_config }}
+    mode=0644
+  notify: restart zabbix agent
+- name: ensure zabbix agent config drop-in directory exists
+  file:
+    path={{ zbx_agent_config_dir }}
+    mode=0755
+    seuser=system_u
+    setype=etc_t
+    state=directory
+- name: ensure zabbix is allowed in the firewall
+  firewalld:
+    port=10050/tcp
+    permanent=no
+    immediate=yes
+    state=enabled
+  tags:
+  - firewalld
+  notify: save firewalld configuration
+
+- name: ensure zabbix agent starts at boot
+  service:
+    name={{ zbx_agent_svc }}
+    enabled=yes
+- meta: flush_handlers
+- name: ensure zabbix agent is running
+  service:
+    name={{ zbx_agent_svc }}
+    state=started