I am using Packer with Ansible to create an AWS EC2 image (AMI). Ansible is used to install Java 8, install the database (Cassandra), install Ansible and upload an Ansible playbook (I know that I should push the playbook to git and pull it but I will do it when this is working). I am installing Ansible and uploading the playbook, because I have to change some of the Cassandra properties when an instance is launched from the AMI (add the current instance IP in the Cassandra options for example). In order to accomplish this I wrote a simple bash script, that is added as the user-data-file
property. This is the script:
#cloud-boothook
#!/bin/bash
#cloud-config
output: {all: '| tee -a /var/log/cloud-init-output.log'}
ansible-playbook -i "localhost," -c local /usr/local/etc/replace_cassandra.yaml
As you can see I am executing the ansible-playbook in a localhost mode.
The problem is that when I start the instance, I am finding an error inside the /var/log/cloud-init.log
file. The error states, that ansible-playbook
could not be found. So I added an ls
line inside the user-data script to check the content of the /usr/bin/
folder (the folder where Ansible is installed) and there were no Ansible in it, but when I access the instance with ssh I can see that Ansible is present inside the /usr/bin/
folder and there is no problem executing the ansible-playbook.
Has anyone encountered a similar problem? I think that this should be a quite popular use case for Ansible with EC2.
EDIT
After some logging I found out that not only there is no Ansible, during the execution of the user data, but the database is missing as well.
Is it possible, that some of the code (or all of it) in the Ansible provisioner in Packer, is executed when the instance is launched?
EDIT2
I have found out what is happening here. When I add the user data via packer trough the user_data_file
property, the user data is executed when packer lunches an instance to build the AMI. The script is launched before the Ansible provisioner is executed, and that is why Ansible is missing.
What I want to do is to automatically add a user data to the AMI, so that when an instance is launched from the AMI, the user data will be executed then, and not when packer builds the said AMI.
Any ideas on how to do this?
bootcmd:
like this doc – David Leeansible-playbook
in the/usr/bin
folder and that is the reason why the code does not work. – Ivan Stoyanovpip install ansible
actually installs ansible. I am using apt and it required for the ansible repo to be added, before it can be installed. – Ivan Stoyanov