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Home OpenStack-Ansible Installation Guide

Infrastructure playbooks

Figure 6.1. Installation workflow

image

The main Ansible infrastructure playbook installs infrastructure services and performs the following operations:

  • Installs Memcached
  • Installs the repository server
  • Installs Galera
  • Installs RabbitMQ
  • Installs Rsyslog
  • Configures Rsyslog

Running the infrastructure playbook

Note

Before continuing, validate the configuration files using the guidance in Checking the integrity of your configuration files.

  1. Change to the /opt/openstack-ansible/playbooks directory.

  2. Run the infrastructure setup playbook:

    # openstack-ansible setup-infrastructure.yml

    Confirm satisfactory completion with zero items unreachable or failed:

    PLAY RECAP ********************************************************************
...
deployment_host                : ok=27   changed=0    unreachable=0    failed=0

Verify the database cluster

  1. Change to the /opt/openstack-ansible/playbooks directory.

  2. Execute the following command to show the current cluster state:

    # ansible galera_container -m shell -a "mysql \
-h localhost -e 'show status like \"%wsrep_cluster_%\";'"

    Example output:

    node3_galera_container-3ea2cbd3 | success | rc=0 >>
Variable_name             Value
wsrep_cluster_conf_id     17
wsrep_cluster_size        3
wsrep_cluster_state_uuid  338b06b0-2948-11e4-9d06-bef42f6c52f1
wsrep_cluster_status      Primary

node2_galera_container-49a47d25 | success | rc=0 >>
Variable_name             Value
wsrep_cluster_conf_id     17
wsrep_cluster_size        3
wsrep_cluster_state_uuid  338b06b0-2948-11e4-9d06-bef42f6c52f1
wsrep_cluster_status      Primary

node4_galera_container-76275635 | success | rc=0 >>
Variable_name             Value
wsrep_cluster_conf_id     17
wsrep_cluster_size        3
wsrep_cluster_state_uuid  338b06b0-2948-11e4-9d06-bef42f6c52f1
wsrep_cluster_status      Primary

    The wsrep_cluster_size field indicates the number of nodes in the cluster and the wsrep_cluster_status field indicates primary.