Ansible - templates实战_ansible templates-优快云博客

本文链接：https://blog.youkuaiyun.com/hqwang4/article/details/127136876

本文介绍如何使用Ansible的template模块动态生成PostgreSQL配置文件。通过定义特定的模版文件和YAML任务，可以在多个远程主机上批量创建并更新配置。

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templates是ansible的一个模块，其功能是根据模版文件动态生成配置文件，templates文件必须存放于templates目录下，且命名为.js结尾，yaml/yml文件需要和templates目录平级，这样我们在yml文件中调用模版的时候，就不需要写模版文件的路径，否则需要描述模版文件的路径，应为template模版会自动去找template目录下的模版文件。

编写templates模版

vi templates/postgresql.conf.j2

autovacuum_naptime = {{autovacuum_naptime}}

max_files_per_process = {{max_files_per_process}}

wal_keep_size = {{wal_keep_size}}

wal_log_hints={{wal_log_hints}}

port = {{port}}

application_name = {{application_name}}

编写生成config文件Task

vi 2.1.yml

执行脚本

ansible-playbook -i ./hosts 2.1.yml -v

PLAY [all] **********************************************************************************************************************************************************************************************

TASK [create postgres config file] **********************************************************************************************************************************************************************

changed: [172.23.51.8] => {"ansible_facts": {"discovered_interpreter_python": "/usr/bin/python"}, "changed": true, "checksum": "997fb3be27548fbe969359137e6ad8d34f0d764c", "dest": "/home/postgres/data/postgresql.conf", "gid": 26, "group": "postgres", "md5sum": "8fd116b720aa6560e0d032973396003f", "mode": "0644", "owner": "postgres", "secontext": "unconfined_u:object_r:user_home_t:s0", "size": 27616, "src": "/home/postgres/.ansible/tmp/ansible-tmp-1663595136.15-25047-91312860667012/source", "state": "file", "uid": 26}

changed: [172.23.51.7] => {"ansible_facts": {"discovered_interpreter_python": "/usr/bin/python"}, "changed": true, "checksum": "997fb3be27548fbe969359137e6ad8d34f0d764c", "dest": "/home/postgres/data/postgresql.conf", "gid": 26, "group": "postgres", "md5sum": "8fd116b720aa6560e0d032973396003f", "mode": "0644", "owner": "postgres", "secontext": "unconfined_u:object_r:user_home_t:s0", "size": 27616, "src": "/home/postgres/.ansible/tmp/ansible-tmp-1663595136.13-25045-30802466220075/source", "state": "file", "uid": 26}

changed: [172.23.51.3] => {"ansible_facts": {"discovered_interpreter_python": "/usr/bin/python"}, "changed": true, "checksum": "997fb3be27548fbe969359137e6ad8d34f0d764c", "dest": "/home/postgres/data/postgresql.conf", "gid": 26, "group": "postgres", "md5sum": "8fd116b720aa6560e0d032973396003f", "mode": "0644", "owner": "postgres", "size": 27616, "src": "/home/postgres/.ansible/tmp/ansible-tmp-1663595135.89-25044-161306747051950/source", "state": "file", "uid": 26}

PLAY RECAP **********************************************************************************************************************************************************************************************

172.23.51.3 : ok=1 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0

172.23.51.7 : ok=1 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0

172.23.51.8 : ok=1 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0

在远程主机查看执行结果

ansible -i ./hosts all -m shell -a "ls /home/postgres/data/postgres*"

172.23.51.7 | CHANGED | rc=0 >>

/home/postgres/data/postgresql.conf

172.23.51.8 | CHANGED | rc=0 >>

/home/postgres/data/postgresql.conf

172.23.51.3 | CHANGED | rc=0 >>

/home/postgres/data/postgresql.conf