Difference between revisions of "Packer"
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Revision as of 23:53, 29 August 2018
HashiCorp Packer is a tool to automate the creation of any type of machine image. It embraces modern configuration management by encouraging you to use automated scripts to install and configure the software within your Packer-made images. Packer brings machine images into the modern age, unlocking untapped potential and opening new opportunities.
Example
- Create an AWS AMI using Ubuntu 16.04 as a base image with Docker 17.03 pre-installed
- Packer template:
$ cat << EOF > packer-docker-17.03-ubuntu-16.04.json { "variables": { "aws_access_key": "", "aws_secret_key": "", "region": "us-west-2" }, "builders": [ { "type": "amazon-ebs", "access_key": "{{user `aws_access_key`}}", "secret_key": "{{user `aws_secret_key`}}", "region": "us-west-2", "source_ami_filter": { "filters": { "virtualization-type": "hvm", "name": "ubuntu/images/*ubuntu-xenial-16.04-amd64-server-*", "root-device-type": "ebs" }, "owners": [ "099720109477" ], "most_recent": true }, "instance_type": "t2.micro", "ssh_username": "ubuntu", "ami_name": "packer-docker-17.03-ubuntu-16.04" } ], "provisioners": [ { "type": "shell", "script": "./docker-install-17.03-ubuntu-16.04.sh" } ] } EOF
- Docker install script:
$ cat << EOF >docker-install-17.03-ubuntu-16.04.sh #!/bin/bash # Install Docker 17.03.2 on Ubuntu 16.04 sudo apt-get install -y apt-transport-https ca-certificates curl software-properties-common curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable" sudo apt-get update -y apt-cache madison docker-ce sudo apt-get install -y docker-ce=17.03.2~ce-0~ubuntu-xenial echo "docker-ce hold" | sudo dpkg --set-selections sudo apt-get dselect-upgrade sudo usermod -aG docker ubuntu sudo systemctl enable docker sudo systemctl restart docker EOF
- Create Packer run script:
$ cat << EOF > packer-run.sh #!/bin/bash AWS_ACCESS_KEY="$1" AWS_SECRET_KEY="$2" JSON=$3 packer build \ -var "aws_access_key=${AWS_ACCESS_KEY}" \ -var "aws_secret_key=${AWS_SECRET_KEY}" \ $3
- Run Packer script (example):
$ bash packer-run.sh "<your_aws_access_key>" "<your_aws_secret_key>" packer-docker-17.03-ubuntu-16.04.json
If the above packer run completes successfully, you should see something like the following:
==> Builds finished. The artifacts of successful builds are: --> amazon-ebs: AMIs were created: us-west-2: ami-000000000000000
You can now use this Packer-created AMI to launch EC2 instances in AWS.