add ucloud packer docs
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---
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description: |
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The `ucloud-uhost` Packer builder plugin provide the capability to build
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customized images based on an existing base images.
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layout: docs
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page_title: UCloud Image Builder
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sidebar_current: 'docs-builders-ucloud-uhost'
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---
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# UCloud Image Builder
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Type: `ucloud-uhost`
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The `ucloud-uhost` Packer builder plugin provide the capability to build
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customized images based on an existing base images.
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This builder builds an UCloud image by launching an UHost instance from a source image,
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provisioning that running machine, and then creating an image from that machine.
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## Configuration Reference
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The following configuration options available for building UCloud images. They are
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segmented below into two categories: required and optional parameters.
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In addition to the options listed here, a
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[communicator](../templates/communicator.html) can be configured for this
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builder.
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### Required:
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- `public_key` - (string) This is the UCloud public key. It must be provided, but it can also be sourced from the `UCLOUD_PUBLIC_KEY` environment variable.
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- `private_key` - (string) This is the UCloud private key. It must be provided, but it can also be sourced from the `UCLOUD_PRIVATE_KEY` environment variable.
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- `project_id` - (string) This is the UCloud project id. It must be provided, but it can also be sourced from the `UCLOUD_PROJECT_ID` environment variables.
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- `region` - (string) This is the UCloud region. It must be provided, but it can also be sourced from the `UCLOUD_REGION` environment variables.
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- `availability_zone` - (string) This is the UCloud availability zone where UHost instance is located. such as: `cn-bj2-02`. You may refer to [list of c zone](https://docs.ucloud.cn/api/summary/regionlist)
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- `instance_type` - (string) The type of UHost instance. You may refer to [list of instance type](https://docs.ucloud.cn/compute/terraform/specification/instance)
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- `image_name` - (string) The name of the user-defined image, which contains 1-63 characters and only support Chinese, English, numbers, '-_,.:[]'.
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- `source_image_id` (string) - This is the base image id which you want to create your customized images.
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### Optional:
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- `use_ssh_private_ip` - (boolean) - If this value is true, packer will connect to the created UHost instance through private ip instead of allocating an EIP (elastic public ip).(Default: `false`).
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- `internet_bandwidth` - (string) Maximum bandwidth to the EIP (elastic public ip), measured in Mbps (Mega bit per second).
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The ranges for bandwidth are: 1-200 for pay by traffic, 1-800 for pay by bandwith. (Default: `1`).
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- `internet_charge_mode` -(Optional) The EIP (elastic public ip) charge mode associated to UHost instance. Possible values are: `traffic` as pay by traffic, `bandwidth` as pay by bandwidth. (Default: `traffic`).
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- `vpc_id` - (string) The ID of VPC linked to the UHost instance. If not defined `vpc_id`, the instance will use the default VPC in the current region.
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- `subnet_id` - (string) The ID of subnet. If defined `vpc_id`, the `subnet_id` is Required. If not defined `vpc_id` and `subnet_id`, the instance will use the default subnet in the current region.
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- `security_group` - (string) The ID of the fire wall associate to UHost instance. If not defined `security_group`,
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the instance will use the recommend non web fire wall, which default opened port include 22, 3389.
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You may refer to [security group](https://docs.ucloud.cn/network/firewall/firewall.html).
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- `image_description` (string) - The description of the image.
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- `instance_name` (string) - The name of instance, which contains 1-63 characters and only support Chinese, English, numbers, '-', '_', '.'.
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- `boot_disk_type` - (string) The type of boot disk about UHost instance.
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Possible values are: `cloud_normal` and `cloud_ssd` for cloud boot disk. (Default: `cloud_ssd`).
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The `local_ssd`, `cloud_normal` and `cloud_ssd` are not fully support by all regions as boot disk type, please proceed to UCloud console for more details.
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- `image_copy_mappings` (array of copied image mappings) - The array of mappings about copy to the destination regions under the project.
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- `image_copy_project_id` (string) - The the UCloud project id, where copying image in.
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- `image_copy_region` (string) - The the UCloud region, where copying image in.
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- `image_copy_name` (string) - The copied image name.
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- `image_copy_description` (number) - The copied image description.
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## Basic Example
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Here is a basic example for build UCloud image.
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``` json
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{
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"variables": {
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"ucloud_public_key": "{{env `UCLOUD_PUBLIC_KEY`}}",
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"ucloud_private_key": "{{env `UCLOUD_PRIVATE_KEY`}}"
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},
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"builders": [{
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"type":"ucloud-uhost",
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"public_key":"{{user `ucloud_public_key`}}",
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"private_key":"{{user `ucloud_private_key`}}",
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"region":"cn-bj2",
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"image_name":"packer_test_{{timestamp}}",
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"source_image":"uimage-u3d50m",
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"ssh_username":"root",
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"instance_type":"n-basic-2",
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}]
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}
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```
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-> **Note:** Packer can also read the public key and private key from
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environmental variables. See the configuration reference in the section above
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for more information on what environmental variables Packer will look for.
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\~> **Note:** Source image may be deprecated after a while, you can use the tools like `UCloud CLI` to run `ucloud image list` to find one that exists.
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