Packer piplines and workflow

packer对docker和aws AMI的支持都很好，来上个图：

配套的模版长这样:

{
	"variables": {
		"name": "webimage",
		"namespace": "jamtur01",
		"fqdn": "webapp.example.com",
		"osName": "ubuntu",
		"osVersion": "17.04",
		"ami": "ami-a025aeb6",
		"aws_region": "us-east-1",
		"aws_access_key": "",
		"aws_secret_key": ""
	},
	"builders": [{
			"type": "docker",
			"image": "{{user `osName`}}:{{user `osVersion`}}",
			"commit": true
		},
		{
			"type": "amazon-ebs",
			"access_key": "{{user `aws_access_key`}}",
			"secret_key": "{{user `aws_secret_key`}}",
			"region": "{{user `aws_region`}}",
			"source_ami": "{{user `ami`}}",
			"instance_type": "t2.micro",
			"ssh_username": "ubuntu",
			"ami_name": "{{user `fqdn`}}-{{timestamp | clean_ami_name}}",
			"ami_description": "Web Application Image",
			"tags": {
				"name": "{{user `name`}}",
				"namespace": "{{user `namespace`}}",
				"fqn": "{{user `fqdn`}}",
				"os": "{{user `osName`}} {{user `osVersion`}}",
				"built": "{{isotime}}"
			}
		}
	],
	"provisioners": [
    {
	    "type": "file",
	    "source": "Gemfile",
	    "destination": "/tmp/Gemfile"
    },
		{
			"type": "shell",
			"script": "provision.sh",
			"override": {
				"amazon-ebs": {
					"execute_command": "sudo {{.Path}}"
				}
			}
		}
	],
	"post-processors": [
		[
		  {
        "type": "docker-tag",
				"repository": "{{user `namespace`}}/{{user `name`}}",
				"tag": "{{user `fqdn`}}",
				"only": ["docker"]
      },
			{
				"type": "docker-push",
				"only": ["docker"]
			}
		]
	]
}

再来一张在CI中使用packer的图：