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9.4. Deploy a Stack Using Orchestration Templates
The Orchestration engine service uses templates (defined as
.template files) to launch instances, IPs, volumes, or other types of stacks. The heat utility is a command-line interface that allows you to create, configure, and launch stacks.
Note
The openstack-heat-templates package provides sample templates that you can use to test core Orchestration features. It also contains template-related scripts and conversion tools. To install this package, run the following command:
yum install -y openstack-heat-templates
# yum install -y openstack-heat-templates
Some Orchestration templates launch instances that require access to the
openstack-heat-api-cfn service. Such instances must be able to communicate with the openstack-heat-api-cloudwatch service and the openstack-heat-api-cfn service. The IPs and ports used by these services are the values set in the /etc/heat/heat.conf file as heat_metadata_server_url and heat_watch_server_url.
To allow access to these services, you must open the ports used by
openstack-heat-api-cloudwatch (8003), openstack-heat-api-cfn (8000), and openstack-api (8004).
Procedure 9.8. Deploying a Stack Using Orchestration Templates
- Open the
/etc/sysconfig/iptablesfile in a text editor. - Add the following INPUT rules to allow TCP traffic on ports
8003,8000, and8004:-A INPUT -i BR -p tcp --dport 8003 -j ACCEPT -A INPUT -i BR -p tcp --dport 8000 -j ACCEPT -A INPUT -p tcp -m multiport --dports 8004 -j ACCEPT
-A INPUT -i BR -p tcp --dport 8003 -j ACCEPT -A INPUT -i BR -p tcp --dport 8000 -j ACCEPT -A INPUT -p tcp -m multiport --dports 8004 -j ACCEPTCopy to Clipboard Copied! Toggle word wrap Toggle overflow Replace BR with the interface of the bridge used by the instances launched from Orchestration templates. Do not include the-i BRparameter in theINPUTrules if you are not usingnova-network, or if the Orchestration service andnova-computeare not hosted on the same server. - Save the changes to the
/etc/sysconfig/iptablesfile. - Restart the
iptablesservice for the firewall changes to take effect:systemctl restart iptables.service
# systemctl restart iptables.serviceCopy to Clipboard Copied! Toggle word wrap Toggle overflow - Launch an application:
heat stack-create STACKNAME \ --template-file=PATH_TEMPLATE \ --parameters="PARAMETERS"
# heat stack-create STACKNAME \ --template-file=PATH_TEMPLATE \ --parameters="PARAMETERS"Copy to Clipboard Copied! Toggle word wrap Toggle overflow Replace the following values:- Replace STACKNAME with the name to assign to the stack. This name will appear when you run the
heat stack-listcommand. - Replace PATH_TEMPLATE with the path to your
.templatefile. - Replace PARAMETERS with a semicolon-delimited list of stack creation parameters to use. Supported parameters are defined in the template file itself.