基本

ansible速度优化

  1. #M0 开启执行速度记录插件
  2. callback_whitelist = profile_tasks
  3.     ANSIBLE_CALLBACK_WHITELIST = profile_tasks
  5. #M1.1 如可以关闭gather_fact
  7. #M1.2 设置fact缓存（支持jsonfile和redis）
  8. 设置facts缓存(缓存支持jsonfile和redis)
  9. gathering: smart|implicit|explicit
  10. smart表示默认收集facts，但facts已有的情况下不会收集，即使用缓存facts
  11. implicit表示默认收集facts，要禁止收集，必须使用gather_facts: False
  12. explicit则表示默认不收集，要显式收集，必须使用gather_facts: Ture
  13. [defaults]
  14. gathering = smart
  15. fact_caching_timeout = 86400
  16. fact_caching = jsonfile
  17. fact_caching_connection = /path/to/cachedir
  19. #M1.3 关闭秘钥检测
  20. host_key_checking = False
  21.     ANSIBLE_HOST_KEY_CHECKING = False
  23. #M1.4 关闭OpenSSH服务的DNS PTR
  24. sed  -i  '/^GSSAPI/s/yes/no/g；/UseDNS/d；/Protocol/aUseDNS no' /etc/ssh/sshd_config
  26. #M2 采用ssh多路复用（长连接方式）
  27. ssh_args = -o ControlMaster=auto -o ControlPersist=60s
  28.     ANSIBLE_SSH_ARGS = -C -o ControlMaster=auto -o ControlPersist=5d
  30. #M3 采用Pipline 
  31. #https://docs.ansible.com/ansible/latest/reference_appendices/config.html
  32.     ANSIBLE_SSH_PIPELINING = True    cat /etc/sudoers | grep requiretty
  34. #M4 修改task执行策略
  35. #修改ansible执行策略，需要ansible2.0版本以上，修改默认的配置linear --> strategy
  37. #M5 使用Mitogen的plugin插件
  38. https://mitogen.networkgenomics.com/howitworks.html
  39. wget https://files.pythonhosted.org/packages/source/m/mitogen/mitogen-0.2.7.tar.gz
  40. tar axf mitogen-0.2.7.tar.gz -C /opt/
  41. [defaults]
  42. strategy_plugins = /opt/mitogen-0.2.7/ansible_mitogen/plugins/strategy
  43. strategy = mitogen_linear

变量优先级

以下为优先级从低到高 注意：第一个不是命令行-e提供的变量， -e提供的是额外的变量是最后一个

command line values (eg “-u user”)
role defaults [1]
inventory file or script group vars [2]
inventory group_vars/all [3]
playbook group_vars/all [3]
inventory group_vars/* [3]
playbook group_vars/* [3]
inventory file or script host vars [2]
inventory host_vars/* [3]
playbook host_vars/* [3]
host facts / cached set_facts [4]
play vars
play vars_prompt
play vars_files
role vars (defined in role/vars/main.yml)
block vars (only for tasks in block)
task vars (only for the task)
include_vars
set_facts / registered vars
role (and include_role) params
include params
extra vars (always win precedence)

常见

问题：Jinja2模板空白控制及换行

#Template like this 
solr.replication.master=
    {% if ansible_eth0.ipv4.address == servermaster.eth0 %}
        false
    {% else %}
        true
    {% endif %}

solr.replication.slave=false
#And the output should look like this:
solr.replication.master=true
solr.replication.slave=false
#What I am actually getting is:
solr.replication.master=truesolr.replication.slave=false

解决： 在jinja2模板第一行加上 #jinja2: trim_blocks:False 参考

参考文档