Terraform module to define a generic Bastion host with parameterized user_data and support for AWS SSM Session Manager for remote access with IAM authentication.
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| Benchmark | Description |
|---|---|
| Infrastructure Security Compliance | |
| Center for Internet Security, KUBERNETES Compliance | |
| Center for Internet Security, AWS Compliance | |
| Center for Internet Security, AZURE Compliance | |
| Payment Card Industry Data Security Standards Compliance | |
| National Institute of Standards and Technology Compliance | |
| Information Security Management System, ISO/IEC 27001 Compliance | |
| Service Organization Control 2 Compliance | |
| Center for Internet Security, GCP Compliance | |
| Health Insurance Portability and Accountability Compliance |
Available targets:
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lint Lint terraform code
| Name | Version |
|---|---|
| terraform | >= 0.13.0 |
| aws | >= 2.55 |
| template | >= 2.1 |
| Name | Version |
|---|---|
| aws | >= 2.55 |
| template | >= 2.1 |
| Name | Source | Version |
|---|---|---|
| dns | cloudposse/route53-cluster-hostname/aws | 0.12.2 |
| security_group | cloudposse/security-group/aws | 0.3.3 |
| this | cloudposse/label/null | 0.25.0 |
| Name | Type |
|---|---|
| aws_eip.default | resource |
| aws_iam_instance_profile.default | resource |
| aws_iam_role.default | resource |
| aws_iam_role_policy.main | resource |
| aws_instance.default | resource |
| aws_ami.default | data source |
| aws_iam_policy_document.default | data source |
| aws_iam_policy_document.main | data source |
| aws_region.default | data source |
| aws_route53_zone.domain | data source |
| template_file.user_data | data source |
| Name | Description | Type | Default | Required |
|---|---|---|---|---|
| additional_tag_map | Additional key-value pairs to add to each map in tags_as_list_of_maps. Not added to tags or id.This is for some rare cases where resources want additional configuration of tags and therefore take a list of maps with tag key, value, and additional configuration. |
map(string) |
{} |
no |
| ami_filter | List of maps used to create the AMI filter for the action runner AMI. | map(list(string)) |
{ |
no |
| ami_owners | The list of owners used to select the AMI of action runner instances. | list(string) |
[ |
no |
| assign_eip_address | Assign an Elastic IP address to the instance | bool |
true |
no |
| associate_public_ip_address | Whether to associate a public IP to the instance. | bool |
false |
no |
| attributes | ID element. Additional attributes (e.g. workers or cluster) to add to id,in the order they appear in the list. New attributes are appended to the end of the list. The elements of the list are joined by the delimiterand treated as a single ID element. |
list(string) |
[] |
no |
| context | Single object for setting entire context at once. See description of individual variables for details. Leave string and numeric variables as null to use default value.Individual variable settings (non-null) override settings in context object, except for attributes, tags, and additional_tag_map, which are merged. |
any |
{ |
no |
| delimiter | Delimiter to be used between ID elements. Defaults to - (hyphen). Set to "" to use no delimiter at all. |
string |
null |
no |
| descriptor_formats | Describe additional descriptors to be output in the descriptors output map.Map of maps. Keys are names of descriptors. Values are maps of the form {<br> format = string<br> labels = list(string)<br>}(Type is any so the map values can later be enhanced to provide additional options.)format is a Terraform format string to be passed to the format() function.labels is a list of labels, in order, to pass to format() function.Label values will be normalized before being passed to format() so they will beidentical to how they appear in id.Default is {} (descriptors output will be empty). |
any |
{} |
no |
| disable_api_termination | Enable EC2 Instance Termination Protection | bool |
false |
no |
| ebs_block_device_encrypted | Whether to encrypt the EBS block device | bool |
true |
no |
| ebs_block_device_volume_size | The volume size (in GiB) to provision for the EBS block device. Creation skipped if size is 0 | number |
0 |
no |
| ebs_delete_on_termination | Whether the EBS volume should be destroyed on instance termination | bool |
true |
no |
| ebs_device_name | The name of the EBS block device to mount on the instance | string |
"/dev/sdh" |
no |
| enabled | Set to false to prevent the module from creating any resources | bool |
null |
no |
| environment | ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT' | string |
null |
no |
| host_name | The Bastion hostname created in Route53 | string |
"bastion" |
no |
| id_length_limit | Limit id to this many characters (minimum 6).Set to 0 for unlimited length.Set to null for keep the existing setting, which defaults to 0.Does not affect id_full. |
number |
null |
no |
| instance_profile | A pre-defined profile to attach to the instance (default is to build our own) | string |
"" |
no |
| instance_type | Bastion instance type | string |
"t2.micro" |
no |
| key_name | Key name | string |
"" |
no |
| label_key_case | Controls the letter case of the tags keys (label names) for tags generated by this module.Does not affect keys of tags passed in via the tags input.Possible values: lower, title, upper.Default value: title. |
string |
null |
no |
| label_order | The order in which the labels (ID elements) appear in the id.Defaults to ["namespace", "environment", "stage", "name", "attributes"]. You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present. |
list(string) |
null |
no |
| label_value_case | Controls the letter case of ID elements (labels) as included in id,set as tag values, and output by this module individually. Does not affect values of tags passed in via the tags input.Possible values: lower, title, upper and none (no transformation).Set this to title and set delimiter to "" to yield Pascal Case IDs.Default value: lower. |
string |
null |
no |
| labels_as_tags | Set of labels (ID elements) to include as tags in the tags output.Default is to include all labels. Tags with empty values will not be included in the tags output.Set to [] to suppress all generated tags.Notes: The value of the name tag, if included, will be the id, not the name.Unlike other null-label inputs, the initial setting of labels_as_tags cannot bechanged in later chained modules. Attempts to change it will be silently ignored. |
set(string) |
[ |
no |
| metadata_http_endpoint_enabled | Whether the metadata service is available | bool |
true |
no |
| metadata_http_put_response_hop_limit | The desired HTTP PUT response hop limit (between 1 and 64) for instance metadata requests. | number |
1 |
no |
| metadata_http_tokens_required | Whether or not the metadata service requires session tokens, also referred to as Instance Metadata Service Version 2. | bool |
true |
no |
| monitoring | Launched EC2 instance will have detailed monitoring enabled | bool |
true |
no |
| name | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'. This is the only ID element not also included as a tag.The "name" tag is set to the full id string. There is no tag with the value of the name input. |
string |
null |
no |
| namespace | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | string |
null |
no |
| regex_replace_chars | Terraform regular expression (regex) string. Characters matching the regex will be removed from the ID elements. If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits. |
string |
null |
no |
| root_block_device_encrypted | Whether to encrypt the root block device | bool |
true |
no |
| root_block_device_volume_size | The volume size (in GiB) to provision for the root block device. It cannot be smaller than the AMI it refers to. | number |
8 |
no |
| security_group_description | The Security Group description. | string |
"Bastion host security group" |
no |
| security_group_enabled | Whether to create default Security Group for bastion host. | bool |
true |
no |
| security_group_rules | A list of maps of Security Group rules. The values of map is fully complated with aws_security_group_rule resource. To get more info see https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/security_group_rule . |
list(any) |
[ |
no |
| security_group_use_name_prefix | Whether to create a default Security Group with unique name beginning with the normalized prefix. | bool |
false |
no |
| security_groups | A list of Security Group IDs to associate with bastion host. | list(string) |
[] |
no |
| ssh_user | Default SSH user for this AMI. e.g. ec2-user for Amazon Linux and ubuntu for Ubuntu systems |
string |
"ec2-user" |
no |
| ssm_enabled | Enable SSM Agent on Host. | bool |
true |
no |
| stage | ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' | string |
null |
no |
| subnets | AWS subnet IDs | list(string) |
n/a | yes |
| tags | Additional tags (e.g. {'BusinessUnit': 'XYZ'}).Neither the tag keys nor the tag values will be modified by this module. |
map(string) |
{} |
no |
| tenant | ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for | string |
null |
no |
| user_data | User data content. Will be ignored if user_data_base64 is set |
list(string) |
[] |
no |
| user_data_base64 | The Base64-encoded user data to provide when launching the instances. If this is set then user_data will not be used. |
string |
"" |
no |
| user_data_template | User Data template to use for provisioning EC2 Bastion Host | string |
"user_data/amazon-linux.sh" |
no |
| vpc_id | VPC ID | string |
n/a | yes |
| zone_id | Route53 DNS Zone ID | string |
"" |
no |
| Name | Description |
|---|---|
| arn | ARN of the instance |
| hostname | DNS hostname |
| id | Disambiguated ID of the instance |
| instance_id | Instance ID |
| name | Instance name |
| private_dns | Private DNS of instance |
| private_ip | Private IP of the instance |
| public_dns | Public DNS of instance (or DNS of EIP) |
| public_ip | Public IP of the instance (or EIP) |
| role | Name of AWS IAM Role associated with the instance |
| security_group_arn | Bastion host Security Group ARN |
| security_group_id | Bastion host Security Group ID |
| security_group_ids | IDs on the AWS Security Groups associated with the instance |
| security_group_name | Bastion host Security Group name |
| ssh_user | SSH user |
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Check out these related projects.
- bastion - 🔒Secure Bastion implemented as Docker Container running Alpine Linux with Google Authenticator & DUO MFA support
- terraform-aws-ec2-instance - Terraform module for providing a general EC2 instance provisioned by Ansible
- terraform-aws-ec2-ami-backup - Terraform module for automatic & scheduled AMI creation
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