Add read service

apps/init_server/config/httpd.ini

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+[httpd]
+host = localhost 
+port = 8000

apps/init_server/config/state.ini

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+[state]
+base_dir = /run/cic_init

apps/init_server/requirements.txt

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+confini>=0.3.6rc4,<0.5.0

apps/init_server/server.py

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+# standard import
+import json
+import os
+import logging
+import argparse
+import sys
+from http.server import (
+        HTTPServer,
+        BaseHTTPRequestHandler,
+    )
+
+# external imports
+import confini
+
+
+logging.basicConfig(level=logging.WARNING)
+logg = logging.getLogger()
+
+default_config_dir = os.environ.get('CONFINI_DIR', './config')
+
+argparser = argparse.ArgumentParser()
+argparser.add_argument('-c', '--config', dest='c',  default=default_config_dir, type=str, help='rpc provider')
+argparser.add_argument('--host', type=str, help='httpd host')
+argparser.add_argument('--port', type=str, help='httpd port')
+argparser.add_argument('--state-dir', dest='state_dir', type=str, help='directory to read state from')
+argparser.add_argument('--env-prefix', default=os.environ.get('CONFINI_ENV_PREFIX'), dest='env_prefix', type=str, help='environment prefix for variables to overwrite configuration')
+argparser.add_argument('-v', action='store_true', help='be verbose')
+argparser.add_argument('-vv', action='store_true', help='be more verbose')
+args = argparser.parse_args()
+
+if args.vv:
+    logging.getLogger().setLevel(logging.DEBUG)
+elif args.v:
+    logging.getLogger().setLevel(logging.INFO)
+
+config = confini.Config(args.c, args.env_prefix)
+config.process()
+# override args
+args_override = {
+        'HTTPD_HOST': getattr(args, 'host'),
+        'HTTPD_PORT': getattr(args, 'port'),
+        'STATE_BASE_DIR': getattr(args, 'state_dir'),
+        }
+config.dict_override(args_override, 'cli flag')
+logg.debug('loaded config: {}\n'.format(config))
+
+
+class StateRequestHandler(BaseHTTPRequestHandler):
+
+    state_store_dir = None
+
+    def do_GET(self):
+        init_path = os.path.join(self.state_store_dir, 'init')
+        init_level = 0
+        registry_address = None
+        try:
+            f = open(init_path, 'r')
+            init_level = f.read()
+            init_level = init_level.rstrip()
+            f.close()
+        except FileNotFoundError:
+            pass
+
+        registry_path = os.path.join(self.state_store_dir, 'registry')
+        try:
+            f = open(registry_path, 'r')
+            registry_address = f.read()
+            registry_address = registry_address.rstrip()
+            f.close()
+        except FileNotFoundError:
+            pass
+
+
+        o = {
+            'init': init_level,
+            'registry': registry_address,
+                }
+
+        logg.debug('headers {}'.format(self.headers))
+        logg.debug('i {}'.format(o))
+
+        self.send_response(200, 'yarr')
+        self.end_headers()
+        self.wfile.write(json.dumps(o).encode('utf-8'))
+
+
+def run(store, host=None, port=None):
+    port = int(port, 10)
+    server_address = (host, port)
+    httpd = HTTPServer(server_address, StateRequestHandler)
+    httpd.serve_forever()
+
+
+if __name__ == '__main__':
+    try:
+        os.stat(config.get('STATE_BASE_DIR'))
+    except FileNotFoundError:
+        os.makedirs(config.get('STATE_BASE_DIR'))
+    store = StateRequestHandler.state_store_dir=config.get('STATE_BASE_DIR')
+    run(store, host=config.get('HTTPD_HOST'), port=config.get('HTTPD_PORT'))