Initial commit

.gitignore

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+/plugin/
+__pycache__/
+
+.vscode/

Dockerfile

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+FROM python:3-alpine
+
+COPY requirements.txt /opt/
+RUN pip install -r /opt/requirements.txt
+
+RUN mkdir -p /opt/plugin /run/docker/plugins
+COPY plugin.sh /opt/plugin/launch.sh
+COPY net-dhcp/ /opt/plugin/net_dhcp
+WORKDIR /opt/plugin
+ENV GUNICORN_OPTS="--log-level=DEBUG"
+ENTRYPOINT [ "/opt/plugin/launch.sh" ]

Makefile

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+PLUGIN_NAME = devplayer0/net-dhcp
+PLUGIN_TAG ?= latest
+
+all: clean rootfs create
+
+clean:
+	@echo "### rm ./plugin"
+	@rm -rf ./plugin
+
+rootfs:
+	@echo "### docker build: rootfs image with net-dhcp"
+	@docker build -t ${PLUGIN_NAME}:rootfs .
+	@echo "### create rootfs directory in ./plugin/rootfs"
+	@mkdir -p ./plugin/rootfs
+	@docker create --name tmp ${PLUGIN_NAME}:rootfs
+	@docker export tmp | tar -x -C ./plugin/rootfs
+	@echo "### copy config.json to ./plugin/"
+	@cp config.json ./plugin/
+	@docker rm -vf tmp
+
+create:
+	@echo "### remove existing plugin ${PLUGIN_NAME}:${PLUGIN_TAG} if exists"
+	@docker plugin rm -f ${PLUGIN_NAME}:${PLUGIN_TAG} || true
+	@echo "### create new plugin ${PLUGIN_NAME}:${PLUGIN_TAG} from ./plugin"
+	@docker plugin create ${PLUGIN_NAME}:${PLUGIN_TAG} ./plugin
+
+enable:		
+	@echo "### enable plugin ${PLUGIN_NAME}:${PLUGIN_TAG}"		
+	@docker plugin enable ${PLUGIN_NAME}:${PLUGIN_TAG}
+
+push:  clean rootfs create enable
+	@echo "### push plugin ${PLUGIN_NAME}:${PLUGIN_TAG}"
+	@docker plugin push ${PLUGIN_NAME}:${PLUGIN_TAG}

config.json

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+{
+    "description": "Docker host bridge DHCP networking",
+    "interface": {
+        "socket": "net-dhcp.sock",
+        "types": [
+            "docker.networkdriver/1.0",
+            "docker.ipamdriver/1.0"
+        ]
+    },
+    "entrypoint": [ "/opt/plugin/launch.sh" ],
+    "workdir": "/opt/plugin",
+    "network": {
+        "type": "host"
+    },
+    "linux": {
+        "capabilities": [
+            "CAP_SYS_ADMIN"
+        ]
+    },
+    "env": [
+        {
+            "name": "GUNICORN_OPTS",
+            "settable": [
+                "value"
+            ],
+            "value": "--log-level DEBUG --log-file /var/log/net-dhcp.log"
+        }
+    ]
+}

net-dhcp/__init__.py

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+from flask import Flask
+
+app = Flask(__name__)
+
+from . import network, ipam

net-dhcp/ipam.py

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+from flask import jsonify
+
+from . import app
+
+@app.route('/IpamDriver.GetCapabilities')
+def ipam_get_capabilities():
+    return jsonify({
+        'RequiresMACAddress': True,
+        'RequiresRequestReplay': False
+    })

net-dhcp/network.py

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+from flask import jsonify
+
+from . import app
+
+@app.route('/NetworkDriver.GetCapabilities')
+def net_get_capabilities():
+    return jsonify({
+        'Scope': 'local',
+        'ConnectivityScope': 'global'
+    })

plugin.sh

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+#!/bin/sh
+exec gunicorn $GUNICORN_OPTS --workers 1 --bind unix:/run/docker/plugins/net-dhcp.sock net_dhcp:app

requirements.txt

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+flask==1.1.1
+gunicorn==19.9.0