openstack-ansible/doc/source/install-guide/deploymenthost.rst

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Chapter 2. Deployment host

Figure 2.1. Installation work flow

The OSA installation process recommends one deployment host. The deployment host contains Ansible and orchestrates the OpenStack-Ansible installation on the target hosts. We recommend using separate deployment and target hosts. You could alternatively use one of the target hosts, preferably one of the infrastructure variants, as the deployment host. To use a deployment host as a target host, follow the steps in Chapter 3, Target hosts on the deployment host.

Installing the operating system

Install the Ubuntu Server 14.04 (Trusty Tahr) LTS 64-bit operating system on the deployment host. Configure at least one network interface to access the Internet or suitable local repositories.

Configuring the operating system

Install additional software packages and configure NTP.

1. Install additional software packages if not already installed during operating system installation:

   # apt-get install aptitude build-essential git ntp ntpdate \
     openssh-server python-dev sudo

2. Configure NTP to synchronize with a suitable time source.

Configuring the network

Ansible deployments fail if the deployment server is unable to SSH to the containers. Configure the deployment host to be on the same network designated for container management. This configuration reduces the rate of failure due to connectivity issues.

The following network information is used as an example:

Container management: 172.29.236.0/22 (VLAN 10)

Select an IP from this range to assign to the deployment host.

Installing source and dependencies

Install the source and dependencies for the deployment host.

1. Clone the OSA repository into the /opt/openstack-ansible directory:

   # git clone -b TAG https://github.com/openstack/openstack-ansible.git /opt/openstack-ansible

   Replace TAG with the current stable release tag.

2. Change to the /opt/openstack-ansible directory, and run the Ansible bootstrap script:

   # scripts/bootstrap-ansible.sh

Configuring Secure Shell (SSH) keys

Ansible uses Secure Shell (SSH) with public key authentication for connectivity between the deployment and target hosts. To reduce user interaction during Ansible operations, do not include pass phrases with key pairs. However, if a pass phrase is required, consider using the ssh-agent and ssh-add commands to temporarily store the pass phrase before performing Ansible operations.

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