202 lines
6.4 KiB
ReStructuredText
202 lines
6.4 KiB
ReStructuredText
.. _deployment-host:
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===========================
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Prepare the deployment host
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===========================
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.. figure:: figures/installation-workflow-deploymenthost.png
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:width: 100%
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When you install OpenStack in a production environment, we recommend using a
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separate deployment host that contains Ansible and orchestrates the
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OpenStack-Ansible (OSA) installation on the target hosts. In a test
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environment, we recommend using one of the infrastructure target hosts as the
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deployment host.
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To use a target host as a deployment host, follow the steps in
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:deploy_guide:`Prepare the target hosts <targethosts.html>` on
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the deployment host.
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Configuring the operating system
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================================
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Install the operating system
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Install one of the following supported operating systems on the deployment
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hosts:
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* `Ubuntu server 18.04 (Bionic Beaver) LTS 64-bit <http://releases.ubuntu.com/18.04/>`_
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* `Ubuntu server 20.04 (Focal Fossa) LTS 64-bit <http://releases.ubuntu.com/20.04/>`_
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* `Debian 10 (Buster) LTS 64-bit <https://www.debian.org/distrib/>`_
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* `Centos 8 64-bit <http://isoredirect.centos.org/centos/8/isos/x86_64/>`_
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Configure at least one network interface to access the Internet or suitable
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local repositories.
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Configure Ubuntu
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~~~~~~~~~~~~~~~~
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Install additional software packages and configure Network Time Protocol (NTP).
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Before you begin, we recommend upgrading your system packages and kernel.
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#. Update package source lists:
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.. code-block:: shell-session
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# apt update
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#. Upgrade the system packages and kernel:
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.. code-block:: shell-session
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# apt dist-upgrade
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#. Reboot the host.
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#. Install additional software packages if they were not installed
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during the operating system installation:
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.. code-block:: shell-session
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# apt install build-essential git chrony openssh-server python3-dev sudo
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#. Configure NTP to synchronize with a suitable time source.
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Configure CentOS
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~~~~~~~~~~~~~~~~
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Install additional software packages and configure Network Time Protocol (NTP).
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Before you begin, we recommend upgrading your system packages and kernel.
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#. Upgrade the system packages and kernel
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.. code-block:: shell-session
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# dnf upgrade
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#. Reboot the host.
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#. Install additional software packages if they were not installed
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during the operating system installation:
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.. parsed-literal::
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# dnf install \https://repos.fedorapeople.org/repos/openstack/openstack-|rdo_series|/rdo-release-|rdo_series|.el8.rpm
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# dnf install git chrony openssh-server python3-devel sudo
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# dnf group install "Development Tools"
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#. Configure NTP to synchronize with a suitable time source.
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#. The ``firewalld`` service is enabled on most CentOS systems by default and
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its default ruleset prevents OpenStack components from communicating
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properly. Stop the ``firewalld`` service and mask it to prevent it from
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starting:
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.. code-block:: shell-session
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# systemctl stop firewalld
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# systemctl mask firewalld
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.. note::
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There is `future work planned <https://bugs.launchpad.net/openstack-ansible/+bug/1657518>`_
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to create proper firewall rules for OpenStack services in OpenStack-Ansible
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deployments. Until that work is complete, deployers must maintain their
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own firewall rulesets or disable the firewall entirely.
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Configure SSH keys
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==================
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Ansible uses SSH with public key authentication to connect the
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deployment host and target hosts. To reduce user
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interaction during Ansible operations, do not include passphrases with
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key pairs. However, if a passphrase is required, consider using the
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``ssh-agent`` and ``ssh-add`` commands to temporarily store the
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passphrase before performing Ansible operations.
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Configure the network
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=====================
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Ansible deployments fail if the deployment server can't use Secure Shell (SSH)
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to connect to the containers.
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Configure the deployment host (where Ansible is executed) to be on
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the same layer 2 network as the network designated for container management. By
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default, this is the ``br-mgmt`` network. This configuration reduces the rate
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of failure caused by connectivity issues.
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Select an IP address from the following example range to assign to the
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deployment host:
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.. code-block:: ini
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Container management: 172.29.236.0/22 (VLAN 10)
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Install the source and dependencies
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===================================
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Install the source and dependencies for the deployment host.
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.. note::
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If you are installing with limited connectivity, please review
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:dev_docs:`Installing with limited connectivity
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<user/limited-connectivity/index.html>`
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before proceeding.
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#. Clone the latest stable release of the OpenStack-Ansible Git repository in
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the ``/opt/openstack-ansible`` directory:
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.. parsed-literal::
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# git clone -b |latest_tag| \https://opendev.org/openstack/openstack-ansible /opt/openstack-ansible
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If opendev.org can not be accessed to run git clone, github.com can be used
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as an alternative repo:
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.. parsed-literal::
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# git clone -b |latest_tag| \https://github.com/openstack/openstack-ansible.git /opt/openstack-ansible
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#. Change to the ``/opt/openstack-ansible`` directory, and run the
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Ansible bootstrap script:
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.. code-block:: shell-session
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# scripts/bootstrap-ansible.sh
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Configure Docker with Alpine
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============================
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It is an alternative realization of deploy host configuration which includes usage of the Docker
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container as the deploy host.
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This is also neither supported nor tested in CI, so you should use it at your own risk.
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Before you begin, we recommend upgrading your Docker host system packages and kernel.
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#. Prepare your OpenStack Ansible Dockerfile
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.. parsed-literal::
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FROM alpine
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RUN apk add --no-cache bash build-base git python3-dev openssh-client openssh-keygen sudo py3-virtualenv iptables libffi-dev openssl-dev linux-headers coreutils curl
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RUN git clone -b |latest_tag| \https://git.openstack.org/openstack/openstack-ansible /opt/openstack-ansible
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WORKDIR /opt/openstack-ansible
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RUN /opt/openstack-ansible/scripts/bootstrap-ansible.sh
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ENTRYPOINT ["bash"]
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#. Build and run your deploy host container
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.. parsed-literal::
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# docker build . -t openstack-ansible:|latest_tag|
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# docker run -dit --name osa-deploy openstack-ansible:|latest_tag|
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# docker exec -it osa-deploy bash
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#. Configure NTP to synchronize with a suitable time source on the Docker host.
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