add network

README.md

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+Configure interfaces and pbr for RHEL and its derivatives
+Supported iterface types for network-scripts:
+- ethernet (default)
+- loopback
+
+For RHEL8 use:
+
+    network:
+      network_manager:
+        iface:
+          - conn_name: ens256
+            ip4:
+              - "100.127.2.2/29"
+          - conn_name: dummy0
+            type: dummy
+            ip4:
+              - "18.12.3.1/32"
+            routes4:
+              - 0.0.0.0/0 100.127.2.6 table=200
+              - 100.127.2.0/29 100.127.2.2 table=200
+            routes_rule4:
+              - priority 5 from 100.127.2.2 table 200
+              - priority 5 from 18.12.3.1 table 200
+    
+For RHEL7 use: 
+
+    network:
+      network_scripts:
+        iface:
+          - name: ens256
+            ip:
+              - ipaddr: "100.127.2.2"
+                prefix: "/29"
+          - name: lo
+            type: loopback
+            ip:
+              - ipaddr: "18.12.3.1"
+                prefix: "/32"
+            route:
+              - default table 200 via 100.127.2.6
+              - 100.127.2.0/29 table 200 via 100.127.2.2
+            rule:
+              - from 100.127.2.2 table 200
+              - from 18.12.3.1 table 200
+        pbr:
+          table:
+            - number: 200
+              name: "prod"