ANSIBLE14(block-rescue-always)
---- name: ansible (block & resuce & always)
hosts:srvgroup
gather_facts: no
tasks:
- name: block & rescue
block:
- name: test file is exists
shell: "ls /tmp/XXX"
rescue:
- name: create file
copy:
content: "welcome to XXX\n"
dest: "/tmp/XXX"
always:
- name: welcome
shell: "cat /tmp/XXX"
register: v_result
- name: Display
debug:
msg: "{{ v_result.stdout }}"
对照每一步的输出：
---
- name: ansible (block & resuce & always)
hosts:srvgroup
gather_facts: no
$ ansible-playbookv6-8_srvgroup.yml
PLAY *********************************************************************************************************************************
tasks:
- name: block & rescue
block:
- name: test file is exists
shell: "ls /tmp/XXX"
TASK ***********************************************************************************************************************************************
fatal: : FAILED! => {"ansible_facts": {"discovered_interpreter_python": "/usr/libexec/platform-python"}, "changed": true, "cmd": "ls /tmp/XXX", "delta": "0:00:00.009540", "end": "2020-08-15 16:22:07.181198", "msg": "non-zero return code", "rc": 2, "start": "2020-08-15 16:22:07.171658", "stderr": "ls: cannot access '/tmp/XXX': No such file or directory", "stderr_lines": ["ls: cannot access '/tmp/XXX': No such file or directory"], "stdout": "", "stdout_lines": []}
fatal: : FAILED! => {"ansible_facts": {"discovered_interpreter_python": "/usr/libexec/platform-python"}, "changed": true, "cmd": "ls /tmp/XXX", "delta": "0:00:00.025590", "end": "2020-08-15 16:22:07.338628", "msg": "non-zero return code", "rc": 2, "start": "2020-08-15 16:22:07.313038", "stderr": "ls: cannot access '/tmp/XXX': No such file or directory", "stderr_lines": ["ls: cannot access '/tmp/XXX': No such file or directory"], "stdout": "", "stdout_lines": []}
fatal: : FAILED! => {"ansible_facts": {"discovered_interpreter_python": "/usr/libexec/platform-python"}, "changed": true, "cmd": "ls /tmp/XXX", "delta": "0:00:00.007247", "end": "2020-08-15 16:22:07.136683", "msg": "non-zero return code", "rc": 2, "start": "2020-08-15 16:22:07.129436", "stderr": "ls: cannot access '/tmp/XXX': No such file or directory", "stderr_lines": ["ls: cannot access '/tmp/XXX': No such file or directory"], "stdout": "", "stdout_lines": []}
rescue:
- name: create file
copy:
content: "welcome to XXX\n"
dest: "/tmp/XXX"
TASK *******************************************************************************************************************************************************
changed:
changed:
changed:
always:
- name: welcome
shell: "cat /tmp/XXX"
register: v_result
TASK ***********************************************************************************************************************************************************
changed:
changed:
changed:
- name: Display
debug:
msg: "{{ v_result.stdout }}"
TASK ***********************************************************************************************************************************************************
ok: => {
"msg": "welcome to XXX"
}
ok: => {
"msg": "welcome to XXX"
}
ok: => {
"msg": "welcome to XXX"
}
另外一个例子：
---
- name: 处理任务失败的实验
hosts: server3.example.com
tasks:
- name: install services
block:
- name: install
yum:
name: http
state: latest
rescue:
- name: install mysql
yum:
name: mariadb-server
state: latest
always:
- name: restart mariadb
service:
name: mariadb
state: started
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