CloudForms 4.6 provided the ability to run embedded Ansible playbooks as methods, and it can be useful to include such a playbook in an existing workflow such as the VM Provision state machine.
In this example an Ansible playbook method is used at the AcquireIPAddress state to insert an IP address, netmask and gateway into the VM provisioning workflow. A cloud-init script is then used at first boot to set the values in the new VM using nmcli.
Creating the Instance and Method
A new acquire_ip_address instance and method are defined in the usual manner. The method is of Type: playbook and is defined to run on Hosts: localhost
The input parameters for the playbook method are dynamic. Two parameters miq_provision_request_id (the request ID) and miq_provision_id (the task ID), are defined as follows:
The new instance is added to the AcquireIPAddress state of the VM Provision state machine:
Inserting the IP Details into the VM Provision Workflow
The playbook can write the acquired IP details back into the provision task’s options hash in either of two ways: using the RESTful API, or using an Ansible role.
Calling the CloudForms RESTful API
The first example playbook uses the CloudForms RESTful API to write the retrieved IP details back in to the provision task’s options hash. To simplify the example the IP address, netmask and gateway are defined as static vars; in reality these would be retrieved from a corporate IPAM solution such as Infobox.
—
– name: Acquire and Set an IP Address
hosts: all
gather_facts: no
vars:
– ip_addr: 192.168.1.66
– netmask: 24
– gateway: 192.168.1.254
tasks:
– debug: var=miq_provision_id
– debug: var=miq_provision_request_id
– name: Update Task with New IP and Hostname Information
uri:
url: “{{ manageiq.api_url }}/api/provision_requests/{{ miq_provision_request_id }}/request_tasks/{{ miq_provision_id }}”
method: POST
body_format: json
body:
action: edit
resource:
options:
addr_mode: [“static”, “Static”]
ip_addr: “{{ ip_addr }}”
subnet_mask: “{{ netmask }}”
gateway: “{{ gateway }}”
validate_certs: no
headers:
X-Auth-Token: “{{ manageiq.api_token }}”
body_format: json
status_code: 200
Using the manageiq-vmdb Ansible Role
The second example playbook uses the manageiq-vmdb Ansible role (GitHub – syncrou/manageiq-vmdb: Manageiq Role to modify / lookup vmdb objects ) to write the retrieved IP details back into the provision task’s options hash. Once again the IP address, netmask and gateway are defined as static vars for simplicity of illustration.
—
– name: Acquire and Set an IP Address
hosts: all
gather_facts: no
vars:
– ip_addr: 192.168.1.66
– netmask: 24
– gateway: 192.168.1.254
– auto_commit: true
– manageiq_validate_certs: false
roles:
– syncrou.manageiq-vmdb
tasks:
– debug: var=miq_provision_id
– debug: var=miq_provision_request_id
– name: Get the task vmdb object
manageiq_vmdb:
href: “provision_requests/{{ miq_provision_request_id }}/request_tasks/{{ miq_provision_id }}”
register: task_object
– name: Update Task with new IP and Hostname Information
manageiq_vmdb:
vmdb: “{{ task_object }}”
action: edit
data:
options:
addr_mode: [“static”, “Static”]
ip_addr: “{{ ip_addr }}”
subnet_mask: “{{ netmask }}”
gateway: “{{ gateway }}”
In these example playbooks the netmask variable is defined in CIDR format rather than as octets, to be compatible with nmcli.
Configuring the IP Address at First Boot
Configuring a NIC with IP address details is a guest operating system operation, and so must be performed when the VM or instance first boots. For this example a template cloud-init script is defined in Compute -> Infrastructure -> PXE -> Customization Templates in the WebUI, as follows:
<%
root_password = MiqPassword.decrypt(evm[:root_password])
hostname = evm[:hostname]
ip_addr = evm[:ip_addr]
subnet_mask = evm[:subnet_mask]
gateway = evm[:gateway]
dns_servers = evm[:dns_servers]
dns_suffixes = evm[:dns_suffixes]
%>
#cloud-config
ssh_pwauth: true
disable_root: false
users:
– default
– name: ansible-remote
shell: /bin/bash
sudo: [‘ALL=(ALL) NOPASSWD:ALL’]
ssh_authorized_keys:
– ssh-rsa AAAAB3NzaC1yc2E…
chpasswd:
list: |
root:<%= root_password %>
expire: false
runcmd:
## Setup motd
– echo Welcome to VM <%= hostname %>, provisioned by Red Hat CloudForms on $(date) > /etc/motd
– rm -f /root/*
– nmcli –fields UUID con show | awk ‘!/UUID/ {print}’ | while read line; do nmcli con delete uuid $line; done
– nmcli con add con-name eth0 ifname eth0 type ethernet
ip4 “<%= ip_addr %>/<%= subnet_mask %>”
gw4 “<%= gateway %>”
– nmcli con mod eth0
ipv4.dns “<%= dns_servers %>”
ipv4.dns-search “<%= dns_suffixes %>”
connection.autoconnect yes
– nmcli con up eth0
– hostnamectl set-hostname <%= hostname %>
– systemctl mask cloud-init-local cloud-init cloud-config cloud-final
If the cloud-init script is selected from the Customize tab of the provisioning dialog, CloudForms will make the variable substitutions at run-time and inject the resultant script into the VM or instance to be run at first boot.
Quelle: CloudForms
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