Ansible Playbook Implementation

Ansible playbooks automate VM lifecycle operations for Citrix VDA deployment. These are automation scripts written in YAML that define a series of tasks to be executed on remote systems. They describe the desired state of your infrastructure and document the steps needed to achieve it.

How playbooks work:

A playbook contains one or more "plays," each targeting specific hosts and executing a sequence of tasks:

1. Inventory defines which hosts to target (e.g., the hosts group containing your physical Mac machines)

2. Tasks specify actions to perform (deploy VM, install software, configure settings)

3. Variables customize behavior for different environments or use cases

4. Handlers respond to changes (restart services after configuration updates)

An example of an inventory file:

[hosts]
10.0.0.31
10.0.0.32
10.0.0.33

Playbooks eliminate manual work by automating repetitive tasks, ensuring consistency, rapid recovery, providing audit trails, and simplifying updates. Each task in a playbook runs sequentially, and if any task fails, Ansible reports the error and stops execution, preventing partial deployments.

Core Ansible Playbook Examples

VM Deploy

# Plan deployment (dry-run)
ansible-playbook -i inventory deploy.yml -e "vm_group=citrix-vda" -e "desired_vms=1" --tags plan

# Execute deployment
ansible-playbook -i inventory deploy.yml -e "vm_group=citrix-vda" -e "desired_vms=1" 

Delete a single VM 

ansible-playbook -i inventory vm.yml -e "vm_name=citrix-vda-abc123" -e "desired_state=absent"

Delete multiple VMs matching a specific naming convention

# Plan deletion (dry-run)
ansible-playbook -i inventory delete.yml -e "vm_group=citrix-vda-test" -e "delete_count=5" --tags plan

# Execute deletion
ansible-playbook -i inventory delete.yml -e "vm_group=citrix-vda-test" -e "delete_count=5"

Note: This deletes a defined number of VMs from the group with that name. To delete a VM on a specific host, use:

ansible-playbook -i inventory vm.yml -e "vm_name=citrix-vda-abc123" -e "desired_state=absent" --limit 10.0.100.10

Create backup file(s) before deleting a VM

Note: This implementation does not have a dedicated backup Ansible playbook. To preserve VM configurations:

1. Use create_image.yml to create versioned images

2. Store images in your OCI registry

3. To restore: Deploy new VMs from the backed-up image version

VM deletion playbook workflow:

1. Deletes VM from Orka Engine

2. Frees up resources on host

Create a VM Image

ansible-playbook -i inventory create_image.yml -e "vm_image=ghcr.io/macstadium/orka-images/sonoma:latest" -e "remote_image_name=registry.example.com/citrix-vda/sonoma-golden:v1.0"

Before running:

1. Place your configuration scripts (VDA install, etc.) in the /scripts directory

2. Scripts will be executed in alphabetical order

3. Example scripts:

- 01_install_dotnet.sh 
- 02_install_citrix_vda.sh 
- 03_configure_system.sh

Cache a VM Image

ansible-playbook -i inventory pull_image.yml -e "remote_image_name=registry.example.com/citrix-vda/sonoma-finance:v2.0" 

Note: pull_image.yml automatically caches the image on all hosts in the inventory.

Recreate a VM Image

This implementation doesn’t have a dedicated playbook. To refresh VMs with a new image:

ansible-playbook -i inventory vm.yml "vm_name=citrix-vda-abc123" -e "desired_state=absent"

VM recreation playbook workflow:

1. Delete existing VM

2. Create a new VM from specified image

Playbook customization for your environment

The Ansible playbook examples referenced throughout this document will require additional customization to match your infrastructure and organizational requirements.

Environment-specific variables:

Create a group_vars/all.yml file with the following settings as an example:

ansible_user: admin
vm_image: registry.example.com/citrix-vda/sonoma-finance:latest
max_vms_per_host: 2

Test Basic VM Lifecycle Operations

Before deploying to production, validate all playbook operations in a test environment.

Test sequence:

1. Test connectivity

2. Test image operations

3. Test VM deployment

4. Test VDA registration

5. Test VM lifecycle

6. Test image creation

7. Test VM recreation

8. Test VM deletion

9. Test end-to-end user sessions

10. Use verbose output for troubleshooting:

ansible-playbook -i inventory create_orka_vm.yml -vvv -e "vm_name=test-vm-debug" -e "image_source=sonoma-test"