Add examples/basic_rift

examples/basic_rift/README.md

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+
+# RIFT: Routing In Fat Tree
+
+This is evaluation of rift-python powered by IETF.
+
+- draft-ietf-rift-rift-03 https://tools.ietf.org/html/draft-ietf-rift-rift-03
+- rift-python https://github.com/brunorijsman/rift-python
+- juniper's explanation (ppt) https://www.ripe.net/participate/forms/uploads/fobi_plugins/file/see7/Szarkowicz_RIFT_RIPE_TM_bbd50ec4-6dab-4c14-acea-1e767ef7f9da.pptx
+- Kobayashi-san's good explanation jp, (this is talking about rift-01).
+  https://www.slideshare.net/MasayukiKobayashi/rift-a-new-routing-protocol-for-ip-fabrics
+- Miyasaka-san's good explanation jp about IETF100-report that includes about RIFT.
+  https://www.isoc.jp/wiki.cgi?action=ATTACH&file=s4%2Dmiyasaka%2Epdf&page=IETF100Update
+
+
+![](./topo.png)
+
+```
+tn upconf | sudo sh
+docker exec -it Spine1 telnet localhost `docker exec Spine1 cat /rift`
+Trying 127.0.0.1...
+Connected to localhost.
+Escape character is '^]'.
+Spine1> show interfaces
++-----------+------------+-----------+-----------+
+| Interface | Neighbor   | Neighbor  | Neighbor  |
+| Name      | Name       | System ID | State     |
++-----------+------------+-----------+-----------+
+| net0      | Leaf1:net0 | 1001      | THREE_WAY |
++-----------+------------+-----------+-----------+
+| net1      | Leaf2:net0 | 1002      | THREE_WAY |
++-----------+------------+-----------+-----------+
+```
+
+Basically In the RIFT world, Southbound side was received to-Northbound-route
+as a default-route (0.0.0.0/0, 0::/0). We can check that with following cli
+```
+docker exec Leaf1 ip -4 route list
+default proto 99
+        nexthop via 99.1.2.2 dev net0 weight 2
+        nexthop via 99.3.4.4 dev net1 weight 2
+77.1.0.0/24 dev net2 proto kernel scope link src 77.1.0.1
+99.1.2.0/24 dev net0 proto kernel scope link src 99.1.2.1
+99.3.4.0/24 dev net1 proto kernel scope link src 99.3.4.3
+```

examples/basic_rift/ietf_rift_python/meta_topology_2c_2x2.yaml

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+nr-leaf-nodes-per-pod: 2
+nr-spine-nodes-per-pod: 2

examples/basic_rift/ietf_rift_python/rift_leaf1.yaml

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+shards:
+  - id: 0
+    nodes:
+      - name: Leaf1
+        level: 0
+        systemid: 1001
+        interfaces:
+          - name: net0 # leaf1:net0 -> spine1:net0
+          - name: net1 # leaf1:net1 -> spine2:net0
+          - name: net2
+        v4prefixes:
+          - address: 88.0.1.1
+            mask: 32
+            metric: 1
+          - address: 77.1.0.0
+            mask: 24
+            metric: 1

examples/basic_rift/ietf_rift_python/rift_leaf2.yaml

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+shards:
+  - id: 0
+    nodes:
+      - name: Leaf2
+        level: 0
+        systemid: 1002
+        interfaces:
+          - name: net0 # leaf2:net0 -> spine1:net1
+          - name: net1 # leaf2:net1 -> spine2:net1
+          - name: net2
+        v4prefixes:
+          - address: 88.0.2.1
+            mask: 32
+            metric: 1
+          - address: 77.2.0.0
+            mask: 24
+            metric: 1

examples/basic_rift/ietf_rift_python/rift_spine1.yaml

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+shards:
+  - id: 0
+    nodes:
+      - name: Spine1
+        level: 1
+        systemid: 101
+        interfaces:
+          - name: net0 # spine1:net0 -> leaf1:net0
+          - name: net1 # spine1:net1 -> leaf2:net0
+        v4prefixes:
+          - address: 88.1.1.1
+            mask: 32
+            metric: 1

examples/basic_rift/ietf_rift_python/rift_spine2.yaml

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+shards:
+  - id: 0
+    nodes:
+      - name: Spine2
+        level: 1
+        systemid: 102
+        interfaces:
+          - name: net0 # spine2:net0 -> leaf1:net1
+          - name: net1 # spine2:net1 -> leaf2:net1
+        v4prefixes:
+          - address: 88.1.2.1
+            mask: 32
+            metric: 1

examples/basic_rift/spec.yaml

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+
+postinit:
+  - cmds:
+    - cmd: docker cp ietf_rift_python/rift_spine1.yaml Spine1:/root/config.yaml
+    - cmd: docker cp ietf_rift_python/rift_spine2.yaml Spine2:/root/config.yaml
+    - cmd: docker cp ietf_rift_python/rift_leaf1.yaml Leaf1:/root/config.yaml
+    - cmd: docker cp ietf_rift_python/rift_leaf2.yaml Leaf2:/root/config.yaml
+
+nodes:
+  - name: Spine1
+    image: slankdev/rift:ietf-rift-03
+    interfaces:
+      - { name: net0, type: direct, args: Leaf1#net0 }
+      - { name: net1, type: direct, args: Leaf2#net0 }
+  - name: Spine2
+    image: slankdev/rift:ietf-rift-03
+    interfaces:
+      - { name: net0, type: direct, args: Leaf1#net1 }
+      - { name: net1, type: direct, args: Leaf2#net1 }
+  - name: Leaf1
+    image: slankdev/rift:ietf-rift-03
+    interfaces:
+      - { name: net0, type: direct, args: Spine1#net0 }
+      - { name: net1, type: direct, args: Spine2#net0 }
+      - { name: net2, type: direct, args: Serv1#net0 }
+  - name: Leaf2
+    image: slankdev/rift:ietf-rift-03
+    interfaces:
+      - { name: net0, type: direct, args: Spine1#net1 }
+      - { name: net1, type: direct, args: Spine2#net1 }
+      - { name: net2, type: direct, args: Serv2#net0 }
+  - name: Serv1
+    image: slankdev/ubuntu:18.04
+    interfaces: [ { name: net0, type: direct, args: Leaf1#net2 } ]
+  - name: Serv2
+    image: slankdev/ubuntu:18.04
+    interfaces: [ { name: net0, type: direct, args: Leaf2#net2 } ]
+
+node_configs:
+  - name: Spine1
+    cmds:
+      - cmd: ip addr add 88.1.1.1/32 dev lo
+      - cmd: ip addr add 99.1.2.2/24 dev net0
+      - cmd: ip addr add 99.5.6.6/24 dev net1
+      - cmd: >-
+          nohup bash -c "source rift-python/env/bin/activate;
+          python rift-python/rift --telnet-port-file /rift config.yaml" &
+  - name: Spine2
+    cmds:
+      - cmd: ip addr add 88.1.2.1/32 dev lo
+      - cmd: ip addr add 99.3.4.4/24 dev net0
+      - cmd: ip addr add 99.7.8.8/24 dev net1
+      - cmd: >-
+          nohup bash -c "source rift-python/env/bin/activate;
+          python rift-python/rift --telnet-port-file /rift config.yaml" &
+  - name: Leaf1
+    cmds:
+      - cmd: ip addr add 88.0.1.1/32 dev lo
+      - cmd: ip addr add 99.1.2.1/24 dev net0
+      - cmd: ip addr add 99.3.4.3/24 dev net1
+      - cmd: ip addr add 77.1.0.1/24 dev net2
+      - cmd: >-
+          nohup bash -c "source rift-python/env/bin/activate;
+          python rift-python/rift --telnet-port-file /rift config.yaml" &
+  - name: Leaf2
+    cmds:
+      - cmd: ip addr add 88.0.2.1/32 dev lo
+      - cmd: ip addr add 99.5.6.5/24 dev net0
+      - cmd: ip addr add 99.7.8.7/24 dev net1
+      - cmd: ip addr add 77.2.0.1/24 dev net2
+      - cmd: >-
+          nohup bash -c "source rift-python/env/bin/activate;
+          python rift-python/rift --telnet-port-file /rift config.yaml" &
+  - name: Serv1
+    cmds:
+      - cmd: ip addr add 77.1.0.2/24 dev net0
+      - cmd: ip route add default via 77.1.0.1
+  - name: Serv2
+    cmds:
+      - cmd: ip addr add 77.2.0.2/24 dev net0
+      - cmd: ip route add default via 77.2.0.1
+
+test:
+  - name: p2p
+    cmds:
+    - cmd: echo slankdev slankdev
+    - cmd: echo slankdev slankdev
+