Kolla-Ansible安裝OpenStack Ocata版ceph osd配置拷貝失敗導致nova-compute啓動超時失敗的問題
環境配置：
OpenStack版本：Ocata
節點數：4個
各節點宿主操作系統：CentOS7.7
使用Kolla-Ansible安裝OpenStack，Ocata版本，進行多節點部署時候，遇到等待計算節點nova啓動的時候，出現了超時失敗，最終部署終止。錯誤信息如下：
TASK [nova : Waiting for nova-compute service up] *****************************************************************
FAILED - RETRYING: Waiting for nova-compute service up (20 retries left).
...
FAILED - RETRYING: Waiting for nova-compute service up (1 retries left).
fatal: [172.30.220.3 -> 172.30.220.3]: FAILED! => {"attempts": 20, "changed": false, "cmd": ["docker", "exec", "kolla_toolbox", "openstack", "--os-interface", "internal", "--os-auth-url", "http://172.30.230.3:35357", "--os-identity-api-version", "3", "--os-project-domain-name", "default", "--os-tenant-name", "admin", "--os-username", "admin", "--os-password", "3PxtKnvjKDTbPg2QT3llwig08efLoAgkdEY5VVoY", "--os-user-domain-name", "default", "compute", "service", "list", "-f", "json", "--service", "nova-compute"], "delta": "0:00:02.405043", "end": "2017-10-04 16:21:35.742909", "failed": true, "rc": 0, "start": "2017-10-04 16:21:33.337866", "stderr": "", "stderr_lines": [], "stdout": "[]", "stdout_lines": ["[]"]}
往前翻日誌，發現還有一處錯誤，但是部署並沒有因爲這個錯誤終止，錯誤內容如下：
TASK [ceph : Copying over config.json files for services] ******************************************************************************************************
ok: [Controller01] => (item=ceph-mon)
ok: [Compute01] => (item=ceph-mon)
ok: [Compute02] => (item=ceph-mon)
ok: [Compute03] => (item=ceph-mon)
failed: [Compute02] (item=ceph-osd) => {"failed": true, "item": "ceph-osd", "msg": "AnsibleUndefinedVariable: 'dict object' has no attribute 'ipv4'"}
failed: [Compute01] (item=ceph-osd) => {"failed": true, "item": "ceph-osd", "msg": "AnsibleUndefinedVariable: 'dict object' has no attribute 'ipv4'"}
failed: [Compute03] (item=ceph-osd) => {"failed": true, "item": "ceph-osd", "msg": "AnsibleUndefinedVariable: 'dict object' has no attribute 'ipv4'"}
ok: [Controller01] => (item=ceph-osd)
ok: [Compute02] => (item=ceph-rgw)
ok: [Compute01] => (item=ceph-rgw)
ok: [Compute03] => (item=ceph-rgw)
ok: [Controller01] => (item=ceph-rgw)
這個錯誤很奇怪，網上查找很久也沒有專門應對這個問題的解決方案，但是從問題的錯誤信息可以看出，可能是由於網絡方面的問題導致的。後來嘗試各種方法之後，發現各個節點上的NetworkManager服務還在運行，於是禁用了各個節點上的NetworkManager服務，再次重試部署後，上邊的問題就不會出現了，計算節點的nova-compute也可以正常啓動了。
後來查閱資料，OpenStack官方不推薦使用firewalld和NetworkManager，因爲OpenStack使用iptables會和firewalld衝突，NetworkManager運行的話，會對網絡進行自動配置，而neutron`無法察覺到，會導致奇怪的現象出現。