Added initial nginx services

- Proxy allows ingress traffic to be sent to another element in
service mesh
- Mirroring is also in the default configuration
- Default configuration is to proxy to a clover-server and mirror
to snort-ids
- A location_path (URI in HTTP requests) can be reconfigured to
restrict proxing; default to '/'
- A proxy_path can be reconfigured to specify an alternate destination
- A mirror path can be reconfigured to specify where traffic
will be spanned
- The default server_port (listen port) for the proxy is 9180 but can be
reconfigured
- The default server_name is http-proxy but can be reconfigured
- Reconfiguration is done over GRPC with jinja2 template for nginx
- Currently snort ids sends alerts to proxy with stub code in GRPC

- Refactored the code to have a nginx base with subservices
- Proxy, Load Balancer (lb), and Server can share code - mainly GRPC
server
- Nginx subservices have separate docker builds

- Improved build scripts for CI
- Render yaml manifests dynamically
- Improve nginx_client for runtime modifications (but not really
useful yet)

Change-Id: Icbff6890021bcc8a8da4690c9261205d6e1ca43a
Signed-off-by: Eddie Arrage <eddie.arrage@huawei.com>

1 files changed, 64 insertions, 0 deletions

diff --git a/samples/services/nginx/yaml/render_yaml.py b/samples/services/nginx/yaml/render_yaml.py
new file mode 100644
index 0000000..527ba8d
--- /dev/null
+++ b/samples/services/nginx/yaml/render_yaml.py
@@ -0,0 +1,64 @@
+# Copyright (c) Authors of Clover
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+
+import argparse
+
+from jinja2 import Template
+
+
+def render_yaml(args):
+    template_file = 'manifest.template'
+    server_port = '9180'
+    grpc_port = '50054'
+    if args['service_type'] == 'lb':
+        out_file = 'lb.yaml'
+        deploy_name = 'http-lb'
+    elif args['service_type'] == 'proxy':
+        out_file = 'proxy.yaml'
+        deploy_name = 'proxy-access-control'
+    elif args['service_type'] == 'server':
+        out_file = 'server.yaml'
+        deploy_name = 'clover-server'
+    else:
+        return "Invalid service type: {}".format(args['service_type'])
+
+    try:
+        with open(template_file) as f:
+            tmpl = Template(f.read())
+        output = tmpl.render(
+            image_path=args['image_path'],
+            image_name=args['image_name'],
+            image_tag=args['image_tag'],
+            deploy_name=deploy_name,
+            server_port=server_port,
+            grpc_port=grpc_port
+        )
+        with open(out_file, "wb") as fh:
+            fh.write(output)
+        return "Generated manifest for {}".format(args['service_type'])
+    except Exception as e:
+        print(e)
+        return "Unable to generate manifest for {}".format(
+                                        args['service_type'])
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+            '--service_type', required=True,
+            help='The service to generate k8s manifest for')
+    parser.add_argument(
+            '--image_name', required=True,
+            help='The image name to use')
+    parser.add_argument(
+            '--image_path', default='localhost:5000',
+            help='The path to the images to use')
+    parser.add_argument(
+            '--image_tag', default='latest',
+            help='The image tag to use')
+    args = parser.parse_args()
+    print(render_yaml(vars(args)))