= CloudFormation template generation
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When creating a config, you can either have the config under the `configs/{{env_type}}/files/cloud_providers/ec2_cloud_template.j2`, or use the default template.
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If you choose to use the default template, you can still customize it to your needs.
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Have a look at the link:../../configs/just-some-nodes-example/env_vars.yml[env_vars.yml] file from the link:../../configs/just-some-nodes-example/[just-some-nodes-example] config.
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=== Current status and features of the default template
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Resources created by the default template:
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* Instances
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** [x] ElasticIP
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** [x] Storage
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* DNS
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** Mandatory Variables:
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*** `subdomain_base`: the AWS top-level Zone to update, for example `.openshift.opentlc.com`
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** [ ] TODO: Public DNS Zone
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*** [ ] TODO: Allow route53User to access only the delegated zone
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** [x] Internal DNS Zone
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** [x] Cloud DNS load balancer records
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* [x] SecurityGroup
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** [x] SecurityGroup rules
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* [x] Subnet
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* [ ] TODO: S3 Buckets
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** [ ] TODO: Create a bucket and a user that has access to it
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== Security Groups
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The default template comes with 2 default security groups:
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* DefaultSG (allow all connections from the bastion)
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* BastionSG (allow SSH and mosh connection from the internet)
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Have a look at link:defaults/main.yml[defaults/main.yml].
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You can add more security group using the `security_groups` variables.
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Then you can pick the security group**s** you want for any of the instances defined in the `instances` list.
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