Stop platform services for minor upgrade

This section describes how to stop platform services on all servers.

if there are operations in progress, DO NOT STOP the platform services because this can cause serious issues with your platform.
See Check for operations in progress on the platform and wait for all operations to complete

To stop platform services:

Stop the API on the API server or monolithic server
```
systemctl stop abiquo-tomcat
```
Stop the UI on the API server or monolithic server or dedicated UI server
```
systemctl stop httpd
```
Stop remote services server
```
systemctl stop abiquo-tomcat
```
V2V Server
You do not need to stop anything because the BPM remote service is run on-demand only

Stop monitoring server

systemctl stop abiquo-delorean
systemctl stop abiquo-emmett
systemctl stop kairosdb
systemctl stop cassandra

On the monitoring server, check if Cassandra is really dead
```
ps auwx | grep cassandra
```
Get the process number for Cassandra (the first number in the output of the previous command), and kill it. In this example, Cassandra is process 12345.
```
kill -9 12345
```

All processes on platform servers should now be halted.