Changing XenServer Host Passwords In CloudStack

Most of us have a business requirement to change system passwords regularly and when we do, it usually ends up in a mess. Thankfully, Apache CloudStack has an API that allows you to modify XenServer host passwords without mucking around the database and encryption.

The API to change XenServer host password is updateHostPassword which you can use via CloudMonkey CLI tool. The steps to change the XenServer password would roughly be as below:

1. Login to XenCentre and change the pool password
2. Via the CloudMonkey CLI tool, update host password by specifying the clusterid and hostid of all the hosts in the pool.
   [text]
   $ cloudmonkey update hostpassword hostid=efc7f959-d20f-4946-b187-9ba048145c45 clusterid=e8121b66-7de2-4518-a753-5b5decefb841 username=root password=change_this
   [/text]
3. Restart all CloudStack management servers

Below is a little script get_host_uuid.sh to fetch cluster ids and host ids of all XenServer hosts in CloudStack using the CloudMonkey CLI tool.

[text]
[root@csman11 ~]# cat get_host_uuid.sh
#!/bin/bash

cli=`which cloudmonkey`

password=change_this

hosts=`$cli list hosts hypervisor=XenServer|awk -F’ = ‘ ‘/^name/{print $2}’`

for aa in ${hosts}; do
clusterid=`$cli list hosts name=${aa} | awk -F" = " ‘/^clusterid/{print $2}’`
hostid=`$cli list hosts name=${aa} | awk -F" = " ‘/^id/{print $2}’`
echo $cli update hostpassword hostid=${hostid} clusterid=${clusterid} username=root password=${password}
done
[root@csman11 ~]#
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