Thanks for quick response.
we already knew this and we are passing following xml when calling Start action.
<action>
<vm>
<initialization>
<cloud_init>
<host>
<address>vm-cloud-init-restapi</address>
</host>
<authorized_keys>
<authorized_key>
<user>
<user_name>root</user_name>
</user>
<key>ssh-rsa restapi-cloud-init-ssh-key root@localdomain</key>
</authorized_key>
</authorized_keys>
<regenerate_ssh_keys>true</regenerate_ssh_keys>
<timezone>Atlantic/Reykjavik</timezone>
<users>
<user>
<user_name>root</user_name>
<password>SuperSecretPassword!</password>
</user>
</users>
<network_configuration>
<nics>
<nic>
<name>eth0</name>
<boot_protocol>STATIC</boot_protocol>
<network>
<ip address="192.168.2.11" netmask="255.255.255.0" gateway="192.168.2.254" />
</network>
<on_boot>true</on_boot>
</nic>
<nic>
<name>eth1</name>
<boot_protocol>DHCP</boot_protocol>
<on_boot>true</on_boot>
</nic>
</nics>
<dns>
<servers>
<host>
<address>10.20.30.100</address>
</host>
</servers>
<search_domains>
<host>
</host>
</search_domains>
</dns>
</network_configuration>
<files>
<file>
<name>/tmp/file1.txt</name>
<content>line 1
line 2
and now something special
!@#$%^&*()_+</content>
<type>PLAINTEXT</type>
</file>
</files>
</cloud_init>
</initialization>
</vm>
</action>
we also found following link . is this related to my issue?