These files were used to create the demo given at DevConf.cz 2021.

• Pre-recorded presentation
• Demo

Note that there is no inventory/inventory.yml file. I create this dynamically from my OpenStack demo environment. The basic idea is that you need to have 3 hosts, and pick one of them to be the logging, metrics, and NFS server. Depending on how you deployed the machines, you might not need ansible_host if your hosts like host1.example.com resolve both from the controller host and the managed hosts. ansible_user is some user created during node provisioning time. See the demo-heat-template.yaml for how I created this user and specified the ssh key to use and the sudo setup for ansible_become. I also created the storage data volume using the demo-heat-template.yaml and got the device name from the template output. The logging_domain should be a domain which matches all of the client hosts. One more thing - for the sake of sanity I allowed all connections from all ports in my OpenStack cluster - see demo-heat-template.yaml demo_security_group - depending on your provisioning system, you may have to allow specified ports to be opened between your nodes. I used extra_setup.yml to create the ethernet devices used for the network role.

```yaml all: hosts: host1.example.com: ansible_host: xxx.xxx.xxx.xxx ansible_ssh_common_args: -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no ansible_user: demo ansible_become: true host2.example.com: ansible_host: xxx.xxx.xxx.xxx ansible_ssh_common_args: -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no ansible_user: demo ansible_become: true host3.example.com: ansible_host: xxx.xxx.xxx.xxx ansible_ssh_common_args: -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no ansible_user: demo ansible_become: true vars: metrics_server: host1.example.com logging_server: host1.example.com logging_domain: example.com vpn_connections: - hosts: host1.example.com: hostname: host1.example.com host2.example.com: hostname: host2.example.com host3.example.com: hostname: host3.example.com auto: start rekey: true children: logging_servers: hosts: host1.example.com: metrics_servers: hosts: host1.example.com: vars: metrics_monitored_hosts: - host2.example.com - host3.example.com nfs_servers: hosts: host1.example.com: vars: storage_data_volume: /dev/vdb