add rc-scripts and confs. Make log message clear when host is not found

hack/conf.d/ucloud-host

@@ -0,0 +1 @@
+HOSTNAME=server1.place10

hack/rc-scripts/ucloud-api

@@ -0,0 +1,8 @@
+#!/sbin/openrc-run
+
+name="$RC_SVCNAME"
+pidfile="/var/run/${name}.pid"
+command="$(which pipenv)"
+command_args="run python ucloud.py api"
+command_background="true"
+directory="/root/ucloud"

hack/rc-scripts/ucloud-host

@@ -0,0 +1,8 @@
+#!/sbin/openrc-run
+
+name="$RC_SVCNAME"
+pidfile="/var/run/${name}.pid"
+command="$(which pipenv)"
+command_args="run python ucloud.py host ${HOSTNAME}"
+command_background="true"
+directory="/root/ucloud"

hack/rc-scripts/ucloud-scheduler

@@ -0,0 +1,8 @@
+#!/sbin/openrc-run
+
+name="$RC_SVCNAME"
+pidfile="/var/run/${name}.pid"
+command="$(which pipenv)"
+command_args="run python ucloud.py scheduler"
+command_background="true"
+directory="/root/ucloud"

host/main.py

@@ -76,7 +76,7 @@ def main(hostname):
 
     host_pool = HostPool(etcd_client, env_vars.get('HOST_PREFIX'))
     host = next(filter(lambda h: h.hostname == hostname, host_pool.hosts), None)
-    assert host is not None, "No such host"
+    assert host is not None, "No such host with name = {}".format(hostname)
 
     try:
         heartbeat_updating_process.start()