Using Ansible with OpenStack – Gather informations from OpenStack GUI to configure Ansible


Our openstack tenant is already set:

  • a virtual lan gives instances private IP
  • a virtual router map public IP to private IP
  • a security key has been generated
  • we have default firewall configuration for ssh and port 80
  • we are able to launch an instance thanks to the OpenStack web interface

Let gather all needed informations from this web interface.

Authentication informations can be found in the openstack.rc file. this file can be downloaded using the OpenStack webinterface in [access and security/API Access].

$cat openstack.rc
#!/bin/bash
 
# To use an OpenStack cloud you need to authenticate against the Identity
# service named keystone, which returns a **Token** and **Service Catalog**.
# The catalog contains the endpoints for all services the user/tenant has
# access to - such as Compute, Image Service, Identity, Object Storage, Block
# Storage, and Networking (code-named nova, glance, keystone, swift,
# cinder, and neutron).
#
# *NOTE*: Using the 2.0 *Identity API* does not necessarily mean any other
# OpenStack API is version 2.0. For example, your cloud provider may implement
# Image API v1.1, Block Storage API v2, and Compute API v2.0. OS_AUTH_URL is
# only for the Identity API served through keystone.
export OS_AUTH_URL=https://openstack-identity.mycompany.com/v3

# With the addition of Keystone we have standardized on the term **tenant**
# as the entity that owns the resources.
export OS_TENANT_ID=1ac99fef77ee40148d7d5ba3e070caae
export OS_TENANT_NAME="TrainingIC"
export OS_PROJECT_NAME="TrainingIC"

# In addition to the owning entity (tenant), OpenStack stores the entity
# performing the action as the **user**.
export OS_USERNAME="UserTrainingIC"

# With Keystone you pass the keystone password.
echo "Please enter your OpenStack Password: "
read -sr OS_PASSWORD_INPUT
export OS_PASSWORD=$OS_PASSWORD_INPUT

# If your configuration has multiple regions, we set that information here.
# OS_REGION_NAME is optional and only valid in certain environments.
export OS_REGION_NAME="fr"
# Don't leave a blank variable, unset it if it was empty
if [ -z "$OS_REGION_NAME" ]; then unset OS_REGION_NAME; fi 

We get OS_AUTH_URL, OS_TENANT_NAME, OS_USERNAME.

Authentication API version : OS_AUTH_URL

Beware of authentication API version. By default v3 is activated, but ansible needs the v2.0. We get the url and set V2.0 instead of V3 : https://openstack-identity.mycompany.com/v2.0

VM informations

Create an instance using the OpenStack web interface and get the name for image, flavor, key, network, security group.

Create a ./group_vars/all file with all the needed informations.

$vi ./group_vars/all
# Authentication
AuthUserName: UserTrainingIC
AuthPassword: PasswordTrainingIC
TenantName: TrainingIC

# VM infos
ImageName: CentOS-7-x86_64-GenericCloud-1607
FlavorName: m1.1cpu.1gb
InfraKey: KeyTrainingIC
NetworkName: NetPrivateTrainingIC
SecurityGroup: default

if you want to reproduce, please indicate the source:
Using Ansible with OpenStack – Gather informations from OpenStack GUI to configure Ansible - CodeDay