红帽全球峰会3.3. 启用实例 HA
undercloud 完全准备好后，您现在可以运行您下载并提取至 第 3.2 节 “准备 Undercloud” 中的规定的 playbook。这些 playbook 允许您启用带有或不为 Controller 和 Compute 节点配置 STONITH 的 Instance HA。有关 STONITH 的更多信息，请参阅 隔离控制器节点。
在以下每个命令中，将 RELEASE 替换为您的 Red Hat OpenStack Platform swig-HEKETInamely 的对应代码，即 rhos-8。
为 Controller 和 Compute 节点启用实例 HA 并配置 STONITH：
stack@director $ ansible-playbook /home/stack/ansible-instanceha/playbooks/overcloud-instance-ha.yml \ -e release="RELEASE"
stack@director $ ansible-playbook /home/stack/ansible-instanceha/playbooks/overcloud-instance-ha.yml \
-e release="RELEASE"
默认情况下，playbook 将安装启用了共享存储的 instance-ha 解决方案。如果您的 overcloud 没有使用共享存储，请使用 instance_ha_shared_storage=false 选项：
stack@director $ ansible-playbook /home/stack/ansible-instanceha/playbooks/overcloud-instance-ha.yml \ -e release="RELEASE" -e instance_ha_shared_storage=false
stack@director $ ansible-playbook /home/stack/ansible-instanceha/playbooks/overcloud-instance-ha.yml \
-e release="RELEASE" -e instance_ha_shared_storage=false注意
有关实例 HA 中的共享存储的更多信息，请参阅 第 2.1 节 “共享存储的例外”。
在不为 Controller 和 Compute 节点配置 STONITH 的情况下启用 实例 HA：
stack@director $ ansible-playbook /home/stack/ansible-instanceha/playbooks/overcloud-instance-ha.yml \ -e release="RELEASE" -e stonith_devices=”none”
stack@director $ ansible-playbook /home/stack/ansible-instanceha/playbooks/overcloud-instance-ha.yml \
-e release="RELEASE" -e stonith_devices=”none”要只在 Compute 节点上启用实例 HA 并在 Compute 节点上配置 STONITH （例如，如果在 Controller 节点上配置了 STONITH）：
stack@director $ ansible-playbook /home/stack/ansible-instanceha/playbooks/overcloud-instance-ha.yml \ -e release="RELEASE" -e stonith_devices=”computes”
stack@director $ ansible-playbook /home/stack/ansible-instanceha/playbooks/overcloud-instance-ha.yml \
-e release="RELEASE" -e stonith_devices=”computes”
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