Add support for unix upstreams (#266)

Resolves #232

Author: alessfg

molecule/common/playbook_default.yml

@@ -17,7 +17,7 @@
     - name: "Enable Nginx @CentOS-AppStream dnf modules"
       shell:
       args:
-        cmd: dnf module info nginx | grep -q 'Stream.*\[e\]' && echo -n ENABLED || dnf module enable -y nginx # noqa 204 303
+        cmd: dnf module info nginx | grep -q 'Stream.*\[e\]' && echo -n ENABLED || dnf module enable -y nginx  # noqa 204 303
       register: dnf_module_enable
       changed_when: dnf_module_enable.stdout != 'ENABLED'
       when: ansible_os_family == "RedHat" and ansible_distribution_major_version == "8"

molecule/common/playbook_template.yml

@@ -221,6 +221,10 @@
                 port: 8082
                 weight: 1
                 health_check: max_fails=3 fail_timeout=5s
+              backend_server_2:
+                address: unix:/var/run/control.unit.sock
+                weight: 1
+                health_check: max_fails=3 fail_timeout=5s
       frontend:
         template_file: http/default.conf.j2
         conf_file_name: frontend_default.conf

templates/http/default.conf.j2

@@ -10,7 +10,7 @@ upstream {{ item.value.upstreams[upstream].name }} {
     zone {{ item.value.upstreams[upstream].zone_name }} {{ item.value.upstreams[upstream].zone_size }};
 {% endif %}
 {% for server in item.value.upstreams[upstream].servers %}
-    server {{ item.value.upstreams[upstream].servers[server].address }}:{{ item.value.upstreams[upstream].servers[server].port }} weight={{ item.value.upstreams[upstream].servers[server].weight|default("1") }} {{ item.value.upstreams[upstream].servers[server].health_check|default("") }};
+    server {{ item.value.upstreams[upstream].servers[server].address }}{{(":" + item.value.upstreams[upstream].servers[server].port | string) if item.value.upstreams[upstream].servers[server].port is defined}} weight={{ item.value.upstreams[upstream].servers[server].weight | default("1") }} {{ item.value.upstreams[upstream].servers[server].health_check | default("") }};
 {% endfor %}
 {% if item.value.upstreams[upstream].sticky_cookie %}
     sticky cookie srv_id expires=1h  path=/;